From patchwork Thu May 22 12:06:16 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Dubois-Briand X-Patchwork-Id: 891809 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 80672281531; Thu, 22 May 2025 12:06:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747915610; cv=none; b=Xd/2qq/A8vYXiTUaNgsgwIoH70DCYKAGhCz1jLSOh8DAf+9L0ceAzl5XSkEgOLd5ijiAM89Vzw0sWOxHsiTLFtVj/sSQAgApeSx1LXMAtvs5hliqqgJId9HnQYbbiZ5hmp/fdSUzwqP2AL1eUxqfYJWvUtr0a/RFIZdE4Y2CJQM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747915610; c=relaxed/simple; bh=dk/vOyekPaxUPGQVlP91l7WD880+k0K+cVWxAiOYEDA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=XV8GTOIvmBlbjoAp+5vZmt4SDDQ9hwQQ9mQSKGzsRz3j7S75bfcVlUawWY4CqyMEovobkMesak40HxPD4lWCqqWZOiYG4pXypebHtmuQj/PTMOKt0YQG4EF8IrxB8d8Wu6hucyTuZLt7CTlzZM7GRhVVgsMpZvxFOxj+qVcWKmQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=TKCJJNzB; arc=none smtp.client-ip=217.70.183.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="TKCJJNzB" Received: by mail.gandi.net (Postfix) with ESMTPSA id 8956A1FCEA; Thu, 22 May 2025 12:06:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1747915604; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QEoiRvlYtbFSAa8oj8odOk/YLCxewSlJ4hvGsB2qEJ8=; b=TKCJJNzBQT8TCqwazBToQYyWnotIqCdDLagiJZ3eQv1Hkr0qWY3tDLEJkNDYSb1nck1ur0 2vPVCphi+2Z6EXY3BUVHbmkxcytkdK0BggCotAbgR1jwM4x8pGNM9Oq01xNf1AljmyHNDs 9ILPln33rvJGzc6lhtMc5NQPwd9BMZKAbKs2N3e3bFbNzD0FuFx9Xnr5ks2qj2QLBN9Z7+ S2oH4R9fk7aw81QCQW6lw8J/TisTP5lk/c6z76S9bzc6SM90ivdm5B5cU2gkgtA1AZOrp0 1JV39VKlmLgqbtPwoXF4SBAs93t+3vRM9lDxFaOF2aNPXY2HCe/sttBTZGbV0g== From: Mathieu Dubois-Briand Date: Thu, 22 May 2025 14:06:16 +0200 Subject: [PATCH v9 01/11] dt-bindings: mfd: gpio: Add MAX7360 Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250522-mdb-max7360-support-v9-1-74fc03517e41@bootlin.com> References: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> In-Reply-To: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kamel Bouhara , Linus Walleij , Bartosz Golaszewski , Dmitry Torokhov , =?utf-8?q?Uwe_Kleine-K=C3=B6n?= =?utf-8?q?ig?= , Michael Walle , Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, andriy.shevchenko@intel.com, =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747915601; l=8394; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=dk/vOyekPaxUPGQVlP91l7WD880+k0K+cVWxAiOYEDA=; b=m3o7lWZtgeBUcMgCcrEn48O38fdX85w/eVT1UGG+LSjRngK/z3ndFJBs4LpKjlvaMk68a4r8Q e8HkDU6yVHSDleDRR3QQ+18LyZA1Z4RnYIFA7kjYwa2PwKlJ7ARC0kI X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddtgdehleduucdltddurdegfedvrddttddmucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepofgrthhhihgvuhcuffhusghoihhsqdeurhhirghnugcuoehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpeehjedtffefgeefleelkeetvdeggfetgedtjeetuddtveetgedtieelfefgvdeihfenucffohhmrghinhepuggvvhhitggvthhrvggvrdhorhhgpdgrnhgrlhhoghdrtghomhenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvfedprhgtphhtthhopegurghkrheskhgvrhhnvghlrdhorhhgpdhrtghpthhto heplhhinhhushdrfigrlhhlvghijheslhhinhgrrhhordhorhhgpdhrtghpthhtohepsghrohhonhhivgeskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepmhgrthhhihgvuhdrughusghoihhsqdgsrhhirghnugessghoohhtlhhinhdrtghomhdprhgtphhtthhopehthhhomhgrshdrphgvthgriiiiohhnihessghoohhtlhhinhdrtghomhdprhgtphhtthhopegsrhhglhessghguggvvhdrphhlpdhrtghpthhtohepughmihhtrhihrdhtohhrohhkhhhovhesghhmrghilhdrtghomhdprhgtphhtthhopeguvghvihgtvghtrhgvvgesvhhgvghrrdhkvghrnhgvlhdrohhrgh X-GND-Sasl: mathieu.dubois-briand@bootlin.com Add device tree bindings for Maxim Integrated MAX7360 device with support for keypad, rotary, gpios and pwm functionalities. Reviewed-by: Rob Herring (Arm) Signed-off-by: Mathieu Dubois-Briand --- .../bindings/gpio/maxim,max7360-gpio.yaml | 83 +++++++++ .../devicetree/bindings/mfd/maxim,max7360.yaml | 191 +++++++++++++++++++++ 2 files changed, 274 insertions(+) diff --git a/Documentation/devicetree/bindings/gpio/maxim,max7360-gpio.yaml b/Documentation/devicetree/bindings/gpio/maxim,max7360-gpio.yaml new file mode 100644 index 000000000000..c5c3fc4c816f --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/maxim,max7360-gpio.yaml @@ -0,0 +1,83 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/gpio/maxim,max7360-gpio.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Maxim MAX7360 GPIO controller + +maintainers: + - Kamel Bouhara + - Mathieu Dubois-Briand + +description: | + Maxim MAX7360 GPIO controller, in MAX7360 chipset + https://www.analog.com/en/products/max7360.html + + The device provides two series of GPIOs, referred here as GPIOs and GPOs. + + PORT0 to PORT7 pins can be used as GPIOs, with support for interrupts and + constant-current mode. These pins will also be used by the rotary encoder and + PWM functionalities. + + COL2 to COL7 pins can be used as GPOs, there is no input capability. COL pins + will be partitioned, with the first pins being affected to the keypad + functionality and the last ones as GPOs. + +properties: + compatible: + enum: + - maxim,max7360-gpio + - maxim,max7360-gpo + + gpio-controller: true + + "#gpio-cells": + const: 2 + + interrupt-controller: true + + "#interrupt-cells": + const: 2 + + maxim,constant-current-disable: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Bit field, each bit disables constant-current output of the associated + GPIO, starting from the least significant bit for the first GPIO. + maximum: 0xff + +required: + - compatible + - gpio-controller + +allOf: + - if: + properties: + compatible: + contains: + enum: + - maxim,max7360-gpio + ngpios: false + then: + required: + - interrupt-controller + else: + properties: + interrupt-controller: false + maxim,constant-current-disable: false + +additionalProperties: false + +examples: + - | + gpio { + compatible = "maxim,max7360-gpio"; + + gpio-controller; + #gpio-cells = <2>; + maxim,constant-current-disable = <0x06>; + + interrupt-controller; + #interrupt-cells = <2>; + }; diff --git a/Documentation/devicetree/bindings/mfd/maxim,max7360.yaml b/Documentation/devicetree/bindings/mfd/maxim,max7360.yaml new file mode 100644 index 000000000000..3fc920c8639d --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/maxim,max7360.yaml @@ -0,0 +1,191 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/maxim,max7360.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Maxim MAX7360 Keypad, Rotary encoder, PWM and GPIO controller + +maintainers: + - Kamel Bouhara + - Mathieu Dubois-Briand + +description: | + Maxim MAX7360 device, with following functions: + - keypad controller + - rotary controller + - GPIO and GPO controller + - PWM controller + + https://www.analog.com/en/products/max7360.html + +allOf: + - $ref: /schemas/input/matrix-keymap.yaml# + - $ref: /schemas/input/input.yaml# + +properties: + compatible: + enum: + - maxim,max7360 + + reg: + maxItems: 1 + + interrupts: + maxItems: 2 + + interrupt-names: + items: + - const: inti + - const: intk + + keypad-debounce-delay-ms: + description: Keypad debounce delay in ms + minimum: 9 + maximum: 40 + default: 9 + + rotary-debounce-delay-ms: + description: Rotary encoder debounce delay in ms + minimum: 0 + maximum: 15 + default: 0 + + linux,axis: + $ref: /schemas/input/rotary-encoder.yaml#/properties/linux,axis + + rotary-encoder,relative-axis: + $ref: /schemas/types.yaml#/definitions/flag + description: + Register a relative axis rather than an absolute one. + + rotary-encoder,steps: + $ref: /schemas/types.yaml#/definitions/uint32 + default: 24 + description: + Number of steps in a full turnaround of the + encoder. Only relevant for absolute axis. Defaults to 24 which is a + typical value for such devices. + + rotary-encoder,rollover: + $ref: /schemas/types.yaml#/definitions/flag + description: + Automatic rollover when the rotary value becomes + greater than the specified steps or smaller than 0. For absolute axis only. + + "#pwm-cells": + const: 3 + + gpio: + $ref: /schemas/gpio/maxim,max7360-gpio.yaml# + description: + PORT0 to PORT7 general purpose input/output pins configuration. + + gpo: + $ref: /schemas/gpio/maxim,max7360-gpio.yaml# + description: > + COL2 to COL7 general purpose output pins configuration. Allows to use + unused keypad columns as outputs. + + The MAX7360 has 8 column lines and 6 of them can be used as GPOs. GPIOs + numbers used for this gpio-controller node do correspond to the column + numbers: values 0 and 1 are never valid, values from 2 to 7 might be valid + depending on the value of the keypad,num-column property. + +patternProperties: + '-pins$': + type: object + description: + Pinctrl node's client devices use subnodes for desired pin configuration. + Client device subnodes use below standard properties. + $ref: /schemas/pinctrl/pincfg-node.yaml + + properties: + pins: + description: + List of gpio pins affected by the properties specified in this + subnode. + items: + pattern: '^(PORT[0-7]|ROTARY)$' + minItems: 1 + maxItems: 8 + + function: + description: + Specify the alternative function to be configured for the specified + pins. + enum: [gpio, pwm, rotary] + + additionalProperties: false + +required: + - compatible + - reg + - interrupts + - interrupt-names + - linux,keymap + - linux,axis + - "#pwm-cells" + - gpio + - gpo + +unevaluatedProperties: false + +examples: + - | + #include + #include + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + io-expander@38 { + compatible = "maxim,max7360"; + reg = <0x38>; + + interrupt-parent = <&gpio1>; + interrupts = <23 IRQ_TYPE_LEVEL_LOW>, + <24 IRQ_TYPE_LEVEL_LOW>; + interrupt-names = "inti", "intk"; + + keypad,num-rows = <8>; + keypad,num-columns = <4>; + linux,keymap = < + MATRIX_KEY(0x00, 0x00, KEY_F5) + MATRIX_KEY(0x01, 0x00, KEY_F4) + MATRIX_KEY(0x02, 0x01, KEY_F6) + >; + keypad-debounce-delay-ms = <10>; + autorepeat; + + rotary-debounce-delay-ms = <2>; + linux,axis = <0>; /* REL_X */ + rotary-encoder,relative-axis; + + #pwm-cells = <3>; + + max7360_gpio: gpio { + compatible = "maxim,max7360-gpio"; + + gpio-controller; + #gpio-cells = <2>; + maxim,constant-current-disable = <0x06>; + + interrupt-controller; + #interrupt-cells = <0x2>; + }; + + max7360_gpo: gpo { + compatible = "maxim,max7360-gpo"; + + gpio-controller; + #gpio-cells = <2>; + }; + + backlight_pins: backlight-pins { + pins = "PORT2"; + function = "pwm"; + }; + }; + }; From patchwork Thu May 22 12:06:17 2025 Content-Type: text/plain; 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bh=Ez+JrwG7KQaKCryUKW2Ux1EEekY5LyIMC3ab9jmtyTA=; b=WAaSN1K5avokAdNhiKr2y088bxS679O/CyuptTMkNsAr6hs4ZnTuUKwWFKkqE4g+Hu7drX MsWMxdhCdyOruYyvvCk+Qo6Sk6x9IsXIxp3r+YoX569/zj1ldSSjFnvszt++yxyAqy6DBX PWELSF7V4aozhkdj0a5mcQo8ZRA4VVP3m+KmXAt6eJaFqQmS6SGrSjBrfYAwDDlYACD5Lh X4Rt8EkMTi3TGUy2Hj1cHyeN2k/wAjSeHwakByhd79mhrWgUj4kH5x+8e95Ik29X/JD01N uEY99z4gNuv1ZRn0O2hxcFlspM36CiKVGO9HrQnxrMIJT9lnjlHfd+0jaq/8sQ== From: mathieu.dubois-briand@bootlin.com Date: Thu, 22 May 2025 14:06:17 +0200 Subject: [PATCH v9 02/11] mfd: Add max7360 support Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250522-mdb-max7360-support-v9-2-74fc03517e41@bootlin.com> References: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> In-Reply-To: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kamel Bouhara , Linus Walleij , Bartosz Golaszewski , Dmitry Torokhov , =?utf-8?q?Uwe_Kleine-K=C3=B6n?= =?utf-8?q?ig?= , Michael Walle , Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, andriy.shevchenko@intel.com, =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747915601; l=10501; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=GIupl4p/k0jiBxoYEh+9yxR2yubWSq+A0Aa6KSuoV/k=; b=IVTj5lraF9IyTaPG2KMn+7lucdNtOzEkrHWWQ9RfD4/B3n1yUMOHWG/FzPyQHkHsEmf45k9I7 i6BhEyzBGgJDMtV9Vg4fQhnj/r6vGfoLyLV05kEC33/0MXTKOo0V3lV X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddtgdehleduucdltddurdegfedvrddttddmucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepmhgrthhhihgvuhdrughusghoihhsqdgsrhhirghnugessghoohhtlhhinhdrtghomhenucggtffrrghtthgvrhhnpeevheffteettefffeetvdelledttddthfevhffgleehfedvveduudfhhedugfelgeenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvfedprhgtphhtthhopegurghkrheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhushdrfigrlhhlvghijheslhhinhgrrhhordhorhhgpdhrtghpthhtohepsghrohhonhhivgeskhgvrhhnvghlrdhorhhgpdhrtghpthhto hepmhgrthhhihgvuhdrughusghoihhsqdgsrhhirghnugessghoohhtlhhinhdrtghomhdprhgtphhtthhopehthhhomhgrshdrphgvthgriiiiohhnihessghoohhtlhhinhdrtghomhdprhgtphhtthhopegsrhhglhessghguggvvhdrphhlpdhrtghpthhtohepughmihhtrhihrdhtohhrohhkhhhovhesghhmrghilhdrtghomhdprhgtphhtthhopeguvghvihgtvghtrhgvvgesvhhgvghrrdhkvghrnhgvlhdrohhrgh X-GND-Sasl: mathieu.dubois-briand@bootlin.com From: Kamel Bouhara Add core driver to support MAX7360 i2c chip, multi function device with keypad, GPIO, PWM, GPO and rotary encoder submodules. Signed-off-by: Kamel Bouhara Co-developed-by: Mathieu Dubois-Briand Signed-off-by: Mathieu Dubois-Briand --- drivers/mfd/Kconfig | 14 ++++ drivers/mfd/Makefile | 1 + drivers/mfd/max7360.c | 171 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/max7360.h | 109 ++++++++++++++++++++++++++++ 4 files changed, 295 insertions(+) diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 22b936310039..c2998c6ce54c 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -2422,5 +2422,19 @@ config MFD_UPBOARD_FPGA To compile this driver as a module, choose M here: the module will be called upboard-fpga. +config MFD_MAX7360 + tristate "Maxim MAX7360 I2C IO Expander" + depends on I2C + select MFD_CORE + select REGMAP_I2C + select REGMAP_IRQ + help + Say yes here to add support for Maxim MAX7360 device, embedding + keypad, rotary encoder, PWM and GPIO features. + + This driver provides common support for accessing the device; + additional drivers must be enabled in order to use the functionality + of the device. + endmenu endif diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 948cbdf42a18..add9ff58eb25 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -162,6 +162,7 @@ obj-$(CONFIG_MFD_DA9063) += da9063.o obj-$(CONFIG_MFD_DA9150) += da9150-core.o obj-$(CONFIG_MFD_MAX14577) += max14577.o +obj-$(CONFIG_MFD_MAX7360) += max7360.o obj-$(CONFIG_MFD_MAX77541) += max77541.o obj-$(CONFIG_MFD_MAX77620) += max77620.o obj-$(CONFIG_MFD_MAX77650) += max77650.o diff --git a/drivers/mfd/max7360.c b/drivers/mfd/max7360.c new file mode 100644 index 000000000000..5ee459c490ec --- /dev/null +++ b/drivers/mfd/max7360.c @@ -0,0 +1,171 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Maxim MAX7360 Core Driver + * + * Copyright 2025 Bootlin + * + * Authors: + * Kamel Bouhara + * Mathieu Dubois-Briand + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static const struct mfd_cell max7360_cells[] = { + { .name = "max7360-pinctrl" }, + { .name = "max7360-pwm" }, + { .name = "max7360-keypad" }, + { .name = "max7360-rotary" }, + { + .name = "max7360-gpo", + .of_compatible = "maxim,max7360-gpo", + }, + { + .name = "max7360-gpio", + .of_compatible = "maxim,max7360-gpio", + }, +}; + +static const struct regmap_range max7360_volatile_ranges[] = { + regmap_reg_range(MAX7360_REG_KEYFIFO, MAX7360_REG_KEYFIFO), + regmap_reg_range(MAX7360_REG_I2C_TIMEOUT, MAX7360_REG_RTR_CNT), +}; + +static const struct regmap_access_table max7360_volatile_table = { + .yes_ranges = max7360_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(max7360_volatile_ranges), +}; + +static const struct regmap_config max7360_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = MAX7360_REG_PWMCFG(MAX7360_PORT_PWM_COUNT - 1), + .volatile_table = &max7360_volatile_table, + .cache_type = REGCACHE_MAPLE, +}; + +static int max7360_mask_irqs(struct regmap *regmap) +{ + struct device *dev = regmap_get_device(regmap); + unsigned int val; + int ret; + + /* + * GPIO/PWM interrupts are not masked on reset: as the MAX7360 "INTI" + * interrupt line is shared between GPIOs and rotary encoder, this could + * result in repeated spurious interrupts on the rotary encoder driver + * if the GPIO driver is not loaded. Mask them now to avoid this + * situation. + */ + for (unsigned int i = 0; i < MAX7360_PORT_PWM_COUNT; i++) { + ret = regmap_write_bits(regmap, MAX7360_REG_PWMCFG(i), + MAX7360_PORT_CFG_INTERRUPT_MASK, + MAX7360_PORT_CFG_INTERRUPT_MASK); + if (ret) + return dev_err_probe(dev, ret, + "Failed to write MAX7360 port configuration\n"); + } + + /* Read GPIO in register, to ACK any pending IRQ. */ + ret = regmap_read(regmap, MAX7360_REG_GPIOIN, &val); + if (ret) + return dev_err_probe(dev, ret, "Failed to read GPIO values\n"); + + return 0; +} + +static int max7360_reset(struct regmap *regmap) +{ + struct device *dev = regmap_get_device(regmap); + int ret; + + ret = regmap_write(regmap, MAX7360_REG_GPIOCFG, MAX7360_GPIO_CFG_GPIO_RST); + if (ret) { + dev_err(dev, "Failed to reset GPIO configuration: %x\n", ret); + return ret; + } + + ret = regcache_drop_region(regmap, MAX7360_REG_GPIOCFG, MAX7360_REG_GPIO_LAST); + if (ret) { + dev_err(dev, "Failed to drop regmap cache: %x\n", ret); + return ret; + } + + ret = regmap_write(regmap, MAX7360_REG_SLEEP, 0); + if (ret) { + dev_err(dev, "Failed to reset autosleep configuration: %x\n", ret); + return ret; + } + + ret = regmap_write(regmap, MAX7360_REG_DEBOUNCE, 0); + if (ret) + dev_err(dev, "Failed to reset GPO port count: %x\n", ret); + + return ret; +} + +static int max7360_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct regmap *regmap; + int ret; + + regmap = devm_regmap_init_i2c(client, &max7360_regmap_config); + if (IS_ERR(regmap)) + return dev_err_probe(dev, PTR_ERR(regmap), "Failed to initialise regmap\n"); + + ret = max7360_reset(regmap); + if (ret) + return dev_err_probe(dev, ret, "Failed to reset device\n"); + + /* Get the device out of shutdown mode. */ + ret = regmap_write_bits(regmap, MAX7360_REG_GPIOCFG, + MAX7360_GPIO_CFG_GPIO_EN, + MAX7360_GPIO_CFG_GPIO_EN); + if (ret) + return dev_err_probe(dev, ret, "Failed to enable GPIO and PWM module\n"); + + ret = max7360_mask_irqs(regmap); + if (ret) + return dev_err_probe(dev, ret, "Could not mask interrupts\n"); + + ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, + max7360_cells, ARRAY_SIZE(max7360_cells), + NULL, 0, NULL); + if (ret) + return dev_err_probe(dev, ret, "Failed to register child devices\n"); + + return 0; +} + +static const struct of_device_id max7360_dt_match[] = { + { .compatible = "maxim,max7360" }, + {} +}; +MODULE_DEVICE_TABLE(of, max7360_dt_match); + +static struct i2c_driver max7360_driver = { + .driver = { + .name = "max7360", + .of_match_table = max7360_dt_match, + }, + .probe = max7360_probe, +}; +module_i2c_driver(max7360_driver); + +MODULE_DESCRIPTION("Maxim MAX7360 I2C IO Expander core driver"); +MODULE_AUTHOR("Kamel Bouhara "); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/max7360.h b/include/linux/mfd/max7360.h new file mode 100644 index 000000000000..44cf2bf651a2 --- /dev/null +++ b/include/linux/mfd/max7360.h @@ -0,0 +1,109 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __LINUX_MFD_MAX7360_H +#define __LINUX_MFD_MAX7360_H + +#include + +#define MAX7360_MAX_KEY_ROWS 8 +#define MAX7360_MAX_KEY_COLS 8 +#define MAX7360_MAX_KEY_NUM (MAX7360_MAX_KEY_ROWS * MAX7360_MAX_KEY_COLS) +#define MAX7360_ROW_SHIFT 3 + +#define MAX7360_MAX_GPIO 8 +#define MAX7360_MAX_GPO 6 +#define MAX7360_PORT_PWM_COUNT 8 +#define MAX7360_PORT_RTR_PIN (MAX7360_PORT_PWM_COUNT - 1) + +/* + * MAX7360 registers + */ +#define MAX7360_REG_KEYFIFO 0x00 +#define MAX7360_REG_CONFIG 0x01 +#define MAX7360_REG_DEBOUNCE 0x02 +#define MAX7360_REG_INTERRUPT 0x03 +#define MAX7360_REG_PORTS 0x04 +#define MAX7360_REG_KEYREP 0x05 +#define MAX7360_REG_SLEEP 0x06 + +/* + * MAX7360 GPIO registers + * + * All these registers are reset together when writing bit 3 of + * MAX7360_REG_GPIOCFG. + */ +#define MAX7360_REG_GPIOCFG 0x40 +#define MAX7360_REG_GPIOCTRL 0x41 +#define MAX7360_REG_GPIODEB 0x42 +#define MAX7360_REG_GPIOCURR 0x43 +#define MAX7360_REG_GPIOOUTM 0x44 +#define MAX7360_REG_PWMCOM 0x45 +#define MAX7360_REG_RTRCFG 0x46 +#define MAX7360_REG_I2C_TIMEOUT 0x48 +#define MAX7360_REG_GPIOIN 0x49 +#define MAX7360_REG_RTR_CNT 0x4A +#define MAX7360_REG_PWMBASE 0x50 +#define MAX7360_REG_PWMCFGBASE 0x58 + +#define MAX7360_REG_GPIO_LAST 0x5F + +#define MAX7360_REG_PWM(x) (MAX7360_REG_PWMBASE + (x)) +#define MAX7360_REG_PWMCFG(x) (MAX7360_REG_PWMCFGBASE + (x)) + +/* + * Configuration register bits + */ +#define MAX7360_FIFO_EMPTY 0x3F +#define MAX7360_FIFO_OVERFLOW 0x7F +#define MAX7360_FIFO_RELEASE BIT(6) +#define MAX7360_FIFO_COL GENMASK(5, 3) +#define MAX7360_FIFO_ROW GENMASK(2, 0) + +#define MAX7360_CFG_SLEEP BIT(7) +#define MAX7360_CFG_INTERRUPT BIT(5) +#define MAX7360_CFG_KEY_RELEASE BIT(3) +#define MAX7360_CFG_WAKEUP BIT(1) +#define MAX7360_CFG_TIMEOUT BIT(0) + +#define MAX7360_DEBOUNCE GENMASK(4, 0) +#define MAX7360_DEBOUNCE_MIN 9 +#define MAX7360_DEBOUNCE_MAX 40 +#define MAX7360_PORTS GENMASK(8, 5) + +#define MAX7360_INTERRUPT_TIME_MASK GENMASK(4, 0) +#define MAX7360_INTERRUPT_FIFO_MASK GENMASK(7, 5) + +#define MAX7360_PORT_CFG_INTERRUPT_MASK BIT(7) +#define MAX7360_PORT_CFG_INTERRUPT_EDGES BIT(6) +#define MAX7360_PORT_CFG_COMMON_PWM BIT(5) + +/* + * Autosleep register values + */ +#define MAX7360_AUTOSLEEP_8192MS 0x01 +#define MAX7360_AUTOSLEEP_4096MS 0x02 +#define MAX7360_AUTOSLEEP_2048MS 0x03 +#define MAX7360_AUTOSLEEP_1024MS 0x04 +#define MAX7360_AUTOSLEEP_512MS 0x05 +#define MAX7360_AUTOSLEEP_256MS 0x06 + +#define MAX7360_GPIO_CFG_RTR_EN BIT(7) +#define MAX7360_GPIO_CFG_GPIO_EN BIT(4) +#define MAX7360_GPIO_CFG_GPIO_RST BIT(3) + +#define MAX7360_ROT_DEBOUNCE GENMASK(3, 0) +#define MAX7360_ROT_DEBOUNCE_MIN 0 +#define MAX7360_ROT_DEBOUNCE_MAX 15 +#define MAX7360_ROT_INTCNT GENMASK(6, 4) +#define MAX7360_ROT_INTCNT_DLY BIT(7) + +#define MAX7360_INT_INTI 0 +#define MAX7360_INT_INTK 1 + +#define MAX7360_INT_GPIO 0 +#define MAX7360_INT_KEYPAD 1 +#define MAX7360_INT_ROTARY 2 + +#define MAX7360_NR_INTERNAL_IRQS 3 + +#endif From patchwork Thu May 22 12:06:18 2025 Content-Type: text/plain; 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bh=viK3vhxx5RipA5TXaiZo7ax6KLs4M4zWzP2KGresXnI=; b=Qvk/OHgifgMBmKg7yKpP/i0tFb3joWP7Y3339ROIS/hFvj7U2JFZMgmn9h/ZLtLE3CeMPI LbDDSMpoTtt3N1EUNcobdUoZ4ZB2o1ZiHQ03BmhQBmpw45uOwVhU609Rdp7ylfjx8C934Z gT5QmC29tqMCTIDudbQTmoZbC4ZkA4HrRCxzInEzc2N6+tMGovcFHIyXxNNhrqgEgkcsw6 I+TfSJpCYo7MBz5/Ofya97P0q9BM033ICFUWRIOBZVKy+4XtpEXbfBFxnNgd+HbyLXgTZz 8fAHc41DV2zClJjMn7gGlUKFpG/Z7ahiQIl/dWa+7Ln6nhYMkE+3yNCs/tHfwQ== From: Mathieu Dubois-Briand Date: Thu, 22 May 2025 14:06:18 +0200 Subject: [PATCH v9 03/11] pinctrl: Add MAX7360 pinctrl driver Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250522-mdb-max7360-support-v9-3-74fc03517e41@bootlin.com> References: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> In-Reply-To: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kamel Bouhara , Linus Walleij , Bartosz Golaszewski , Dmitry Torokhov , =?utf-8?q?Uwe_Kleine-K=C3=B6n?= =?utf-8?q?ig?= , Michael Walle , Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, andriy.shevchenko@intel.com, =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand , Andy Shevchenko X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747915601; l=9011; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=hGsZR55OfihDnF2tEvh7g9JNQPSI7GKyZaRHC0o8rL8=; b=YQDzhhzIx7aLfmLQ1qDf2Vf+zN4QVXuh3fM0pxRChPM9bM6uBypHFVwSvVEWl5syQhZ0fuKLy ZawRLnvwO49A1qtJJGpwyboCNCYUCIdg0WoaXS47SLdqtVbtNO82C1e X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddtgdehleduucdltddurdegfedvrddttddmucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepofgrthhhihgvuhcuffhusghoihhsqdeurhhirghnugcuoehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpedthfegtedvvdehjeeiheehheeuteejleektdefheehgfefgeelhfetgedttdfhteenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvgedprhgtphhtthhopegurghkrheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhushdrfigrlhhlvghijheslhhinhgrrhhordhorhhgpdhrtghpthhtoheps ghrohhonhhivgeskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprghnughrihihrdhshhgvvhgthhgvnhhkoheslhhinhhugidrihhnthgvlhdrtghomhdprhgtphhtthhopehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhrtghpthhtohepthhhohhmrghsrdhpvghtrgiiiihonhhisegsohhothhlihhnrdgtohhmpdhrtghpthhtohepsghrghhlsegsghguvghvrdhplhdprhgtphhtthhopegumhhithhrhidrthhorhhokhhhohhvsehgmhgrihhlrdgtohhm X-GND-Sasl: mathieu.dubois-briand@bootlin.com Add driver for Maxim Integrated MAX7360 pinctrl on the PORT pins. Pins can be used either for GPIO, PWM or rotary encoder functionalities. Signed-off-by: Mathieu Dubois-Briand Reviewed-by: Linus Walleij Reviewed-by: Andy Shevchenko --- drivers/pinctrl/Kconfig | 11 ++ drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-max7360.c | 215 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 227 insertions(+) diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 464cc9aca157..276695c7a92e 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -348,6 +348,17 @@ config PINCTRL_LPC18XX help Pinctrl driver for NXP LPC18xx/43xx System Control Unit (SCU). +config PINCTRL_MAX7360 + tristate "MAX7360 Pincontrol support" + depends on MFD_MAX7360 + select PINMUX + select GENERIC_PINCONF + help + Say Y here to enable pin control support for Maxim MAX7360 keypad + controller. + This keypad controller has 8 GPIO pins that may work as GPIO, or PWM, + or rotary encoder alternate modes. + config PINCTRL_MAX77620 tristate "MAX77620/MAX20024 Pincontrol support" depends on MFD_MAX77620 && OF diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index ac27e88677d1..974a179b5593 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -36,6 +36,7 @@ obj-$(CONFIG_PINCTRL_FALCON) += pinctrl-falcon.o obj-$(CONFIG_PINCTRL_LOONGSON2) += pinctrl-loongson2.o obj-$(CONFIG_PINCTRL_XWAY) += pinctrl-xway.o obj-$(CONFIG_PINCTRL_LPC18XX) += pinctrl-lpc18xx.o +obj-$(CONFIG_PINCTRL_MAX7360) += pinctrl-max7360.o obj-$(CONFIG_PINCTRL_MAX77620) += pinctrl-max77620.o obj-$(CONFIG_PINCTRL_MCP23S08_I2C) += pinctrl-mcp23s08_i2c.o obj-$(CONFIG_PINCTRL_MCP23S08_SPI) += pinctrl-mcp23s08_spi.o diff --git a/drivers/pinctrl/pinctrl-max7360.c b/drivers/pinctrl/pinctrl-max7360.c new file mode 100644 index 000000000000..abfaff468bad --- /dev/null +++ b/drivers/pinctrl/pinctrl-max7360.c @@ -0,0 +1,215 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2025 Bootlin + * + * Author: Mathieu Dubois-Briand + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "core.h" +#include "pinmux.h" + +struct max7360_pinctrl { + struct pinctrl_dev *pctldev; + struct pinctrl_desc pinctrl_desc; +}; + +static const struct pinctrl_pin_desc max7360_pins[] = { + PINCTRL_PIN(0, "PORT0"), + PINCTRL_PIN(1, "PORT1"), + PINCTRL_PIN(2, "PORT2"), + PINCTRL_PIN(3, "PORT3"), + PINCTRL_PIN(4, "PORT4"), + PINCTRL_PIN(5, "PORT5"), + PINCTRL_PIN(6, "PORT6"), + PINCTRL_PIN(7, "PORT7"), +}; + +static const unsigned int port0_pins[] = {0}; +static const unsigned int port1_pins[] = {1}; +static const unsigned int port2_pins[] = {2}; +static const unsigned int port3_pins[] = {3}; +static const unsigned int port4_pins[] = {4}; +static const unsigned int port5_pins[] = {5}; +static const unsigned int port6_pins[] = {6}; +static const unsigned int port7_pins[] = {7}; +static const unsigned int rotary_pins[] = {6, 7}; + +static const struct pingroup max7360_groups[] = { + PINCTRL_PINGROUP("PORT0", port0_pins, ARRAY_SIZE(port0_pins)), + PINCTRL_PINGROUP("PORT1", port1_pins, ARRAY_SIZE(port1_pins)), + PINCTRL_PINGROUP("PORT2", port2_pins, ARRAY_SIZE(port2_pins)), + PINCTRL_PINGROUP("PORT3", port3_pins, ARRAY_SIZE(port3_pins)), + PINCTRL_PINGROUP("PORT4", port4_pins, ARRAY_SIZE(port4_pins)), + PINCTRL_PINGROUP("PORT5", port5_pins, ARRAY_SIZE(port5_pins)), + PINCTRL_PINGROUP("PORT6", port6_pins, ARRAY_SIZE(port6_pins)), + PINCTRL_PINGROUP("PORT7", port7_pins, ARRAY_SIZE(port7_pins)), + PINCTRL_PINGROUP("ROTARY", rotary_pins, ARRAY_SIZE(rotary_pins)), +}; + +static int max7360_pinctrl_get_groups_count(struct pinctrl_dev *pctldev) +{ + return ARRAY_SIZE(max7360_groups); +} + +static const char *max7360_pinctrl_get_group_name(struct pinctrl_dev *pctldev, + unsigned int group) +{ + return max7360_groups[group].name; +} + +static int max7360_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, + unsigned int group, + const unsigned int **pins, + unsigned int *num_pins) +{ + *pins = max7360_groups[group].pins; + *num_pins = max7360_groups[group].npins; + return 0; +} + +static const struct pinctrl_ops max7360_pinctrl_ops = { + .get_groups_count = max7360_pinctrl_get_groups_count, + .get_group_name = max7360_pinctrl_get_group_name, + .get_group_pins = max7360_pinctrl_get_group_pins, +#ifdef CONFIG_OF + .dt_node_to_map = pinconf_generic_dt_node_to_map_pin, + .dt_free_map = pinconf_generic_dt_free_map, +#endif +}; + +static const char * const simple_groups[] = { + "PORT0", "PORT1", "PORT2", "PORT3", + "PORT4", "PORT5", "PORT6", "PORT7", +}; + +static const char * const rotary_groups[] = { "ROTARY" }; + +#define MAX7360_PINCTRL_FN_GPIO 0 +#define MAX7360_PINCTRL_FN_PWM 1 +#define MAX7360_PINCTRL_FN_ROTARY 2 +static const struct pinfunction max7360_functions[] = { + [MAX7360_PINCTRL_FN_GPIO] = PINCTRL_PINFUNCTION("gpio", simple_groups, + ARRAY_SIZE(simple_groups)), + [MAX7360_PINCTRL_FN_PWM] = PINCTRL_PINFUNCTION("pwm", simple_groups, + ARRAY_SIZE(simple_groups)), + [MAX7360_PINCTRL_FN_ROTARY] = PINCTRL_PINFUNCTION("rotary", rotary_groups, + ARRAY_SIZE(rotary_groups)), +}; + +static int max7360_get_functions_count(struct pinctrl_dev *pctldev) +{ + return ARRAY_SIZE(max7360_functions); +} + +static const char *max7360_get_function_name(struct pinctrl_dev *pctldev, unsigned int selector) +{ + return max7360_functions[selector].name; +} + +static int max7360_get_function_groups(struct pinctrl_dev *pctldev, unsigned int selector, + const char * const **groups, + unsigned int * const num_groups) +{ + *groups = max7360_functions[selector].groups; + *num_groups = max7360_functions[selector].ngroups; + + return 0; +} + +static int max7360_set_mux(struct pinctrl_dev *pctldev, unsigned int selector, + unsigned int group) +{ + struct regmap *regmap = dev_get_regmap(pctldev->dev->parent, NULL); + int val; + + /* + * GPIO and PWM functions are the same: we only need to handle the + * rotary encoder function, on pins 6 and 7. + */ + if (max7360_groups[group].pins[0] >= 6) { + if (selector == MAX7360_PINCTRL_FN_ROTARY) + val = MAX7360_GPIO_CFG_RTR_EN; + else + val = 0; + + return regmap_write_bits(regmap, MAX7360_REG_GPIOCFG, MAX7360_GPIO_CFG_RTR_EN, val); + } + + return 0; +} + +static const struct pinmux_ops max7360_pmxops = { + .get_functions_count = max7360_get_functions_count, + .get_function_name = max7360_get_function_name, + .get_function_groups = max7360_get_function_groups, + .set_mux = max7360_set_mux, + .strict = true, +}; + +static int max7360_pinctrl_probe(struct platform_device *pdev) +{ + struct regmap *regmap; + struct pinctrl_desc *pd; + struct max7360_pinctrl *chip; + struct device *dev = &pdev->dev; + + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) + return dev_err_probe(dev, -ENODEV, "Could not get parent regmap\n"); + + chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + pd = &chip->pinctrl_desc; + + pd->pctlops = &max7360_pinctrl_ops; + pd->pmxops = &max7360_pmxops; + pd->name = dev_name(dev); + pd->pins = max7360_pins; + pd->npins = MAX7360_MAX_GPIO; + pd->owner = THIS_MODULE; + + /* + * This MFD sub-device does not have any associated device tree node: + * properties are stored in the device node of the parent (MFD) device + * and this same node is used in phandles of client devices. + * Reuse this device tree node here, as otherwise the pinctrl subsystem + * would be confused by this topology. + */ + device_set_of_node_from_dev(dev, dev->parent); + + chip->pctldev = devm_pinctrl_register(dev, pd, chip); + if (IS_ERR(chip->pctldev)) + return dev_err_probe(dev, PTR_ERR(chip->pctldev), "can't register controller\n"); + + return 0; +} + +static struct platform_driver max7360_pinctrl_driver = { + .driver = { + .name = "max7360-pinctrl", + }, + .probe = max7360_pinctrl_probe, +}; +module_platform_driver(max7360_pinctrl_driver); + +MODULE_DESCRIPTION("MAX7360 pinctrl driver"); +MODULE_AUTHOR("Mathieu Dubois-Briand "); +MODULE_LICENSE("GPL"); From patchwork Thu May 22 12:06:19 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Dubois-Briand X-Patchwork-Id: 891808 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5BAA028934B; Thu, 22 May 2025 12:06:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747915612; cv=none; b=trpCicAGQ0r8tHrh8W8An5bmJqtygpNwQ4hhV+e+Y5nfd7mwJw0+kAqzWPs8RLw3tyRBfNheDzblNe5dnC0gsu23cA+lVCmBPERxZ2Y/q3DF0YImQqmHNTWbLts66C8rVnNRIyGZW7R8RKiM9XTx9FzBupkHrfSWRfXScOeDem0= ARC-Message-Signature: i=1; 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Thu, 22 May 2025 12:06:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1747915607; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=On49uem17BM2whm4T6qY/vIjfIC4m2O48wEk2iK/QFE=; b=UIZl5weZmydnbEM0oAIBnDJh2bhK+ka9q1N0ZXspdn7zBK+33YK1CB4zM3iQCSGAclUFrx vnYtWPdL0YU1HsOivDk+TVyy6MR9Nc4aX7xdazzt88vhrKtW02ADobpMMa1AOuC51gPVzI 2J4xCvvPa59UVoV9xSygq70bBbPalvXw8F/hoTaN8pC2CE5/bX3DOJiwgP0vY6gTnzHw7K fB7M2PtTDHMWraI8E9dX5nRXLni852UHq2F1FqNWxqyHRIQmx7hCvjBr280cGS/tGQCq9W nf6lkAcfMzAS2AP5Ia1al11vHmXquNC5XphamkFSV1XGAThjimL9ym0I7DsEIg== From: mathieu.dubois-briand@bootlin.com Date: Thu, 22 May 2025 14:06:19 +0200 Subject: [PATCH v9 04/11] pwm: max7360: Add MAX7360 PWM support Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250522-mdb-max7360-support-v9-4-74fc03517e41@bootlin.com> References: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> In-Reply-To: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kamel Bouhara , Linus Walleij , Bartosz Golaszewski , Dmitry Torokhov , =?utf-8?q?Uwe_Kleine-K=C3=B6n?= =?utf-8?q?ig?= , Michael Walle , Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, andriy.shevchenko@intel.com, =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747915601; l=7154; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=WJKFcRM8AN7cugtP2JrUo1E2xCBGu8SQCHDmw4hJitA=; b=jSiiWvCFr8J3KNpATkdyPV/PMTDTMvtHkuLEU0AbjOZhXmo7N8ebnBc/cKXMC8J1AL/K/W14/ xKSHh+72QHMA33Woom3Ah6vB6cwM+Orlieob9lIYWKub7WjXiWaEQgn X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddtgdehleduucdltddurdegfedvrddttddmucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepmhgrthhhihgvuhdrughusghoihhsqdgsrhhirghnugessghoohhtlhhinhdrtghomhenucggtffrrghtthgvrhhnpeevheffteettefffeetvdelledttddthfevhffgleehfedvveduudfhhedugfelgeenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgepudenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvfedprhgtphhtthhopegurghkrheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhushdrfigrlhhlvghijheslhhinhgrrhhordhorhhgpdhrtghpthhtohepsghrohhonhhivgeskhgvrhhnvghlrdhorhhgpdhrtghpthhto hepmhgrthhhihgvuhdrughusghoihhsqdgsrhhirghnugessghoohhtlhhinhdrtghomhdprhgtphhtthhopehthhhomhgrshdrphgvthgriiiiohhnihessghoohhtlhhinhdrtghomhdprhgtphhtthhopegsrhhglhessghguggvvhdrphhlpdhrtghpthhtohepughmihhtrhihrdhtohhrohhkhhhovhesghhmrghilhdrtghomhdprhgtphhtthhopeguvghvihgtvghtrhgvvgesvhhgvghrrdhkvghrnhgvlhdrohhrgh X-GND-Sasl: mathieu.dubois-briand@bootlin.com From: Kamel Bouhara Add driver for Maxim Integrated MAX7360 PWM controller, supporting up to 8 independent PWM outputs. Signed-off-by: Kamel Bouhara Co-developed-by: Mathieu Dubois-Briand Signed-off-by: Mathieu Dubois-Briand --- drivers/pwm/Kconfig | 10 +++ drivers/pwm/Makefile | 1 + drivers/pwm/pwm-max7360.c | 180 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 191 insertions(+) diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig index 4731d5b90d7e..0b22141cbf85 100644 --- a/drivers/pwm/Kconfig +++ b/drivers/pwm/Kconfig @@ -755,4 +755,14 @@ config PWM_XILINX To compile this driver as a module, choose M here: the module will be called pwm-xilinx. +config PWM_MAX7360 + tristate "MAX7360 PWMs" + depends on MFD_MAX7360 + help + PWM driver for Maxim Integrated MAX7360 multifunction device, with + support for up to 8 PWM outputs. + + To compile this driver as a module, choose M here: the module + will be called pwm-max7360. + endif diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile index 539e0def3f82..9c7701d8070b 100644 --- a/drivers/pwm/Makefile +++ b/drivers/pwm/Makefile @@ -36,6 +36,7 @@ obj-$(CONFIG_PWM_LPC32XX) += pwm-lpc32xx.o obj-$(CONFIG_PWM_LPSS) += pwm-lpss.o obj-$(CONFIG_PWM_LPSS_PCI) += pwm-lpss-pci.o obj-$(CONFIG_PWM_LPSS_PLATFORM) += pwm-lpss-platform.o +obj-$(CONFIG_PWM_MAX7360) += pwm-max7360.o obj-$(CONFIG_PWM_MESON) += pwm-meson.o obj-$(CONFIG_PWM_MEDIATEK) += pwm-mediatek.o obj-$(CONFIG_PWM_MICROCHIP_CORE) += pwm-microchip-core.o diff --git a/drivers/pwm/pwm-max7360.c b/drivers/pwm/pwm-max7360.c new file mode 100644 index 000000000000..a0c82c63d2ac --- /dev/null +++ b/drivers/pwm/pwm-max7360.c @@ -0,0 +1,180 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2025 Bootlin + * + * Author: Kamel BOUHARA + * Author: Mathieu Dubois-Briand + * + * Limitations: + * - Only supports normal polarity. + * - The period is fixed to 2 ms. + * - Only the duty cycle can be changed, new values are applied at the beginning + * of the next cycle. + * - When disabled, the output is put in Hi-Z. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MAX7360_NUM_PWMS 8 +#define MAX7360_PWM_MAX_RES 255 +#define MAX7360_PWM_PERIOD_NS (2 * NSEC_PER_MSEC) + +struct max7360_pwm_waveform { + u8 duty_steps; + bool enabled; +}; + +static int max7360_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) +{ + struct regmap *regmap = pwmchip_get_drvdata(chip); + + return regmap_write_bits(regmap, MAX7360_REG_PWMCFG(pwm->hwpwm), + MAX7360_PORT_CFG_COMMON_PWM, 0); +} + +static int max7360_pwm_round_waveform_tohw(struct pwm_chip *chip, + struct pwm_device *pwm, + const struct pwm_waveform *wf, + void *_wfhw) +{ + struct max7360_pwm_waveform *wfhw = _wfhw; + u64 duty_steps; + + /* + * Ignore user provided values for period_length_ns and duty_offset_ns: + * we only support fixed period of MAX7360_PWM_PERIOD_NS and offset of 0. + */ + duty_steps = mul_u64_u64_div_u64(wf->duty_length_ns, MAX7360_PWM_MAX_RES, + MAX7360_PWM_PERIOD_NS); + + wfhw->duty_steps = min(MAX7360_PWM_MAX_RES, duty_steps); + wfhw->enabled = !!wf->duty_length_ns; + + return 0; +} + +static int max7360_pwm_round_waveform_fromhw(struct pwm_chip *chip, struct pwm_device *pwm, + const void *_wfhw, struct pwm_waveform *wf) +{ + const struct max7360_pwm_waveform *wfhw = _wfhw; + + wf->period_length_ns = wfhw->enabled ? MAX7360_PWM_PERIOD_NS : 0; + wf->duty_offset_ns = 0; + wf->duty_length_ns = DIV_ROUND_UP(wfhw->duty_steps * MAX7360_PWM_PERIOD_NS, + MAX7360_PWM_MAX_RES); + + return 0; +} + +static int max7360_pwm_write_waveform(struct pwm_chip *chip, + struct pwm_device *pwm, + const void *_wfhw) +{ + struct regmap *regmap = pwmchip_get_drvdata(chip); + const struct max7360_pwm_waveform *wfhw = _wfhw; + unsigned int val; + int ret; + + if (wfhw->enabled) { + ret = regmap_write(regmap, MAX7360_REG_PWM(pwm->hwpwm), wfhw->duty_steps); + if (ret) + return ret; + } + + val = wfhw->enabled ? BIT(pwm->hwpwm) : 0; + return regmap_write_bits(regmap, MAX7360_REG_GPIOCTRL, BIT(pwm->hwpwm), val); +} + +static int max7360_pwm_read_waveform(struct pwm_chip *chip, + struct pwm_device *pwm, + void *_wfhw) +{ + struct regmap *regmap = pwmchip_get_drvdata(chip); + struct max7360_pwm_waveform *wfhw = _wfhw; + unsigned int val; + int ret; + + ret = regmap_read(regmap, MAX7360_REG_GPIOCTRL, &val); + if (ret) + return ret; + + if (val & BIT(pwm->hwpwm)) { + wfhw->enabled = true; + ret = regmap_read(regmap, MAX7360_REG_PWM(pwm->hwpwm), &val); + if (ret) + return ret; + + wfhw->duty_steps = val; + } else { + wfhw->enabled = false; + wfhw->duty_steps = 0; + } + + return 0; +} + +static const struct pwm_ops max7360_pwm_ops = { + .request = max7360_pwm_request, + .round_waveform_tohw = max7360_pwm_round_waveform_tohw, + .round_waveform_fromhw = max7360_pwm_round_waveform_fromhw, + .read_waveform = max7360_pwm_read_waveform, + .write_waveform = max7360_pwm_write_waveform, +}; + +static int max7360_pwm_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct pwm_chip *chip; + struct regmap *regmap; + int ret; + + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) + return dev_err_probe(dev, -ENODEV, "could not get parent regmap\n"); + + /* + * This MFD sub-device does not have any associated device tree node: + * properties are stored in the device node of the parent (MFD) device + * and this same node is used in phandles of client devices. + * Reuse this device tree node here, as otherwise the PWM subsystem + * would be confused by this topology. + */ + device_set_of_node_from_dev(dev, dev->parent); + + chip = devm_pwmchip_alloc(dev, MAX7360_NUM_PWMS, 0); + if (IS_ERR(chip)) + return PTR_ERR(chip); + chip->ops = &max7360_pwm_ops; + + pwmchip_set_drvdata(chip, regmap); + + ret = devm_pwmchip_add(dev, chip); + if (ret) + return dev_err_probe(dev, ret, "failed to add PWM chip\n"); + + return 0; +} + +static struct platform_driver max7360_pwm_driver = { + .driver = { + .name = "max7360-pwm", + }, + .probe = max7360_pwm_probe, +}; +module_platform_driver(max7360_pwm_driver); + +MODULE_DESCRIPTION("MAX7360 PWM driver"); +MODULE_AUTHOR("Kamel BOUHARA "); +MODULE_AUTHOR("Mathieu Dubois-Briand "); +MODULE_LICENSE("GPL"); From patchwork Thu May 22 12:06:20 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Dubois-Briand X-Patchwork-Id: 892307 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6503A28A715; Thu, 22 May 2025 12:06:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747915613; cv=none; b=DxCcD5RBM61s/ZFgYy5kq4+I4KLJrbUJBcc3IV8WtiN/rFuF9AlFRzUBnDlNUF964x1A65JX2AwA+Oe2dED2ifTUaDik75QnbQcsESYPsMQrLr72zwTL6+d8O2ZRxpFwz3Zk9nFtJ1Q9fhPcIP193VwHHBx1Kbp/wDiURa81XSc= ARC-Message-Signature: i=1; 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Thu, 22 May 2025 12:06:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1747915608; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=C07v46ZJ6NLIc5kB8z+YwuK7NIbUJJo3tiPSKaS9zbw=; b=KFoXqKGTbIabQPeqUFFSRsojQlzJjOByxTjsq/NXv+89PsJ77Opl8H58ZyYG1qmh7ARwRO VabHVhsnXH3w8QRJ5XZ8LJuf7qddRmJunpB5DGQnYJ9hQLtsje4+SCfTvf6vg24NaCR/A5 9GD7XUOM3BL6mGEqa2KD6/0TRwBIUIYKmFcE4RLbjwYAWmygvJ19h4Ij/2GHBZR0oDgT+Z M7ye9/IwBdxZ6GoAGyTTE6JlGSmx9/SOom9V+M7uuHuUIHIXBNz6cqz1lY4bhCn4XWSpgp HaF1RnJYtF5l3JrPevzTtuOBBqA4SSYujN602JcVpNopPthR2CVgssdAr5cDjw== From: Mathieu Dubois-Briand Date: Thu, 22 May 2025 14:06:20 +0200 Subject: [PATCH v9 05/11] regmap: irq: Add support for chips without separate IRQ status Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250522-mdb-max7360-support-v9-5-74fc03517e41@bootlin.com> References: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> In-Reply-To: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kamel Bouhara , Linus Walleij , Bartosz Golaszewski , Dmitry Torokhov , =?utf-8?q?Uwe_Kleine-K=C3=B6n?= =?utf-8?q?ig?= , Michael Walle , Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, andriy.shevchenko@intel.com, =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand , Andy Shevchenko X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747915601; l=7655; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=4L9hpmaLOpRRn8v3HK8FFwF4ksgoZFdcvIRZvr15JLA=; b=/ePaQe48XFpPTeOIbKHqSP/qoZmdXjyCS7gjq7dkVPbQGSlr9q8aygs4xsEaJP5Egx7/w0P2v 5+hZs41oQrLBFRpbOUBa5cP7tko/ZClAwr+eKrOjwmTx33AC/huyjIf X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddtgdehleduucdltddurdegfedvrddttddmucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepofgrthhhihgvuhcuffhusghoihhsqdeurhhirghnugcuoehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpedthfegtedvvdehjeeiheehheeuteejleektdefheehgfefgeelhfetgedttdfhteenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgepudenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvgedprhgtphhtthhopegurghkrheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhushdrfigrlhhlvghijheslhhinhgrrhhordhorhhgpdhrtghpthhtoheps ghrohhonhhivgeskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprghnughrihihrdhshhgvvhgthhgvnhhkoheslhhinhhugidrihhnthgvlhdrtghomhdprhgtphhtthhopehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhrtghpthhtohepthhhohhmrghsrdhpvghtrgiiiihonhhisegsohhothhlihhnrdgtohhmpdhrtghpthhtohepsghrghhlsegsghguvghvrdhplhdprhgtphhtthhopegumhhithhrhidrthhorhhokhhhohhvsehgmhgrihhlrdgtohhm X-GND-Sasl: mathieu.dubois-briand@bootlin.com Some GPIO chips allow to rise an IRQ on GPIO level changes but do not provide an IRQ status for each separate line: only the current gpio level can be retrieved. Add support for these chips, emulating IRQ status by comparing GPIO levels with the levels during the previous interrupt. Signed-off-by: Mathieu Dubois-Briand Reviewed-by: Andy Shevchenko --- drivers/base/regmap/regmap-irq.c | 99 +++++++++++++++++++++++++++------------- include/linux/regmap.h | 3 ++ 2 files changed, 71 insertions(+), 31 deletions(-) diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c index 6c6869188c31..45299d29fd0b 100644 --- a/drivers/base/regmap/regmap-irq.c +++ b/drivers/base/regmap/regmap-irq.c @@ -6,11 +6,13 @@ // // Author: Mark Brown +#include #include #include #include #include #include +#include #include #include #include @@ -33,6 +35,7 @@ struct regmap_irq_chip_data { void *status_reg_buf; unsigned int *main_status_buf; unsigned int *status_buf; + unsigned int *prev_status_buf; unsigned int *mask_buf; unsigned int *mask_buf_def; unsigned int *wake_buf; @@ -332,27 +335,13 @@ static inline int read_sub_irq_data(struct regmap_irq_chip_data *data, return ret; } -static irqreturn_t regmap_irq_thread(int irq, void *d) +static int read_irq_data(struct regmap_irq_chip_data *data) { - struct regmap_irq_chip_data *data = d; const struct regmap_irq_chip *chip = data->chip; struct regmap *map = data->map; int ret, i; - bool handled = false; u32 reg; - if (chip->handle_pre_irq) - chip->handle_pre_irq(chip->irq_drv_data); - - if (chip->runtime_pm) { - ret = pm_runtime_get_sync(map->dev); - if (ret < 0) { - dev_err(map->dev, "IRQ thread failed to resume: %d\n", - ret); - goto exit; - } - } - /* * Read only registers with active IRQs if the chip has 'main status * register'. Else read in the statuses, using a single bulk read if @@ -379,10 +368,8 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) reg = data->get_irq_reg(data, chip->main_status, i); ret = regmap_read(map, reg, &data->main_status_buf[i]); if (ret) { - dev_err(map->dev, - "Failed to read IRQ status %d\n", - ret); - goto exit; + dev_err(map->dev, "Failed to read IRQ status %d\n", ret); + return ret; } } @@ -398,10 +385,8 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) ret = read_sub_irq_data(data, b); if (ret != 0) { - dev_err(map->dev, - "Failed to read IRQ status %d\n", - ret); - goto exit; + dev_err(map->dev, "Failed to read IRQ status %d\n", ret); + return ret; } } @@ -418,9 +403,8 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) data->status_reg_buf, chip->num_regs); if (ret != 0) { - dev_err(map->dev, "Failed to read IRQ status: %d\n", - ret); - goto exit; + dev_err(map->dev, "Failed to read IRQ status: %d\n", ret); + return ret; } for (i = 0; i < data->chip->num_regs; i++) { @@ -436,7 +420,7 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) break; default: BUG(); - goto exit; + return -EIO; } } @@ -447,10 +431,8 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) ret = regmap_read(map, reg, &data->status_buf[i]); if (ret != 0) { - dev_err(map->dev, - "Failed to read IRQ status: %d\n", - ret); - goto exit; + dev_err(map->dev, "Failed to read IRQ status: %d\n", ret); + return ret; } } } @@ -459,6 +441,42 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) for (i = 0; i < data->chip->num_regs; i++) data->status_buf[i] = ~data->status_buf[i]; + return 0; +} + +static irqreturn_t regmap_irq_thread(int irq, void *d) +{ + struct regmap_irq_chip_data *data = d; + const struct regmap_irq_chip *chip = data->chip; + struct regmap *map = data->map; + int ret, i; + bool handled = false; + u32 reg; + + if (chip->handle_pre_irq) + chip->handle_pre_irq(chip->irq_drv_data); + + if (chip->runtime_pm) { + ret = pm_runtime_get_sync(map->dev); + if (ret < 0) { + dev_err(map->dev, "IRQ thread failed to resume: %d\n", ret); + goto exit; + } + } + + ret = read_irq_data(data); + if (ret < 0) + goto exit; + + if (chip->status_is_level) { + for (i = 0; i < data->chip->num_regs; i++) { + unsigned int val = data->status_buf[i]; + + data->status_buf[i] ^= data->prev_status_buf[i]; + data->prev_status_buf[i] = val; + } + } + /* * Ignore masked IRQs and ack if we need to; we ack early so * there is no race between handling and acknowledging the @@ -705,6 +723,13 @@ int regmap_add_irq_chip_fwnode(struct fwnode_handle *fwnode, if (!d->status_buf) goto err_alloc; + if (chip->status_is_level) { + d->prev_status_buf = kcalloc(chip->num_regs, sizeof(*d->prev_status_buf), + GFP_KERNEL); + if (!d->prev_status_buf) + goto err_alloc; + } + d->mask_buf = kcalloc(chip->num_regs, sizeof(*d->mask_buf), GFP_KERNEL); if (!d->mask_buf) @@ -881,6 +906,16 @@ int regmap_add_irq_chip_fwnode(struct fwnode_handle *fwnode, } } + /* Store current levels */ + if (chip->status_is_level) { + ret = read_irq_data(d); + if (ret < 0) + goto err_alloc; + + memcpy(d->prev_status_buf, d->status_buf, + array_size(d->chip->num_regs, sizeof(d->prev_status_buf[0]))); + } + ret = regmap_irq_create_domain(fwnode, irq_base, chip, d); if (ret) goto err_alloc; @@ -908,6 +943,7 @@ int regmap_add_irq_chip_fwnode(struct fwnode_handle *fwnode, kfree(d->mask_buf); kfree(d->main_status_buf); kfree(d->status_buf); + kfree(d->prev_status_buf); kfree(d->status_reg_buf); if (d->config_buf) { for (i = 0; i < chip->num_config_bases; i++) @@ -985,6 +1021,7 @@ void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *d) kfree(d->main_status_buf); kfree(d->status_reg_buf); kfree(d->status_buf); + kfree(d->prev_status_buf); if (d->config_buf) { for (i = 0; i < d->chip->num_config_bases; i++) kfree(d->config_buf[i]); diff --git a/include/linux/regmap.h b/include/linux/regmap.h index d17c5ea3d55d..02b83f5499b8 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -1641,6 +1641,8 @@ struct regmap_irq_chip_data; * @ack_invert: Inverted ack register: cleared bits for ack. * @clear_ack: Use this to set 1 and 0 or vice-versa to clear interrupts. * @status_invert: Inverted status register: cleared bits are active interrupts. + * @status_is_level: Status register is actuall signal level: Xor status + * register with previous value to get active interrupts. * @wake_invert: Inverted wake register: cleared bits are wake enabled. * @type_in_mask: Use the mask registers for controlling irq type. Use this if * the hardware provides separate bits for rising/falling edge @@ -1704,6 +1706,7 @@ struct regmap_irq_chip { unsigned int ack_invert:1; unsigned int clear_ack:1; unsigned int status_invert:1; + unsigned int status_is_level:1; unsigned int wake_invert:1; unsigned int type_in_mask:1; unsigned int clear_on_unmask:1; From patchwork Thu May 22 12:06:21 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Dubois-Briand X-Patchwork-Id: 891807 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3778F28B3EC; Thu, 22 May 2025 12:06:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747915613; cv=none; b=j5YxHyZPFDfQFb8IRW+Y8jgzSrhRqModBlHgc7uvuVMZ0sux5UI9qrKhvGdpkHvdoFenoaOcvN9GaRS4vMZyj9yJrysVQ/ka780i03y6pClh6aJRlZfYa/36vMmvW5Mjkor3TiClQAlcxNNeUELI9K1WPluTvler6u3HXMfRDMc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747915613; c=relaxed/simple; bh=i7m8T29TZzmU1RLfGhZyxp/Da8X8pEh2theXcp9ZkDA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=eWx0yC77MPrXFUCwqJXXTy/p+Pc9Xr1WMx+e1MOcAK8iwzHmHQZrlOp2orSjPwO56XPAxawelA1RXbRjK5QjGycsQHb7P9DQF42lgSnUDJOJ4lshPDR9vsi1I932RrbV8cNlJgqCWAr7+tHARRbi4C0v/Blxdz1dhC4AkLFmX8c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=JLKPldMC; arc=none smtp.client-ip=217.70.183.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="JLKPldMC" Received: by mail.gandi.net (Postfix) with ESMTPSA id A54A31FCF2; Thu, 22 May 2025 12:06:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1747915609; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=thKcO9Yk5VEasUvBAAMlaZ+1p9Q+OWllvzyPr3X/ufc=; b=JLKPldMCJlmKNANxy4mPgj7J2rItClVV0YENJl2jqJjKatSHeA3aNuTwwVxqNHpW92CXtk R9k1KaB74uoZ51apkDYfl2ifwbMq9ZJSTi+T+VeIzcEBlAaRzSxoNQ2U8fK2lTPOzX6h4F EzjVw7+4z/CX2EkFLMBjVM/1HsX1k9fty1TZhxmSQ2QAAX1BZQa/mFuLGgYj81hDvqV9XC Q6k50lE6kYgAU5TRTSnsXBfUeYVw9m8qCXNXF3vFUmYPzmFlHGoYMKHObw1ox4SZoYnwIQ GCCodYB3Tg8lQwSqpP0ivYOW8KfzeixRfJdh7yb/Nl4GRvjTp4G3EX05TE6R6A== From: Mathieu Dubois-Briand Date: Thu, 22 May 2025 14:06:21 +0200 Subject: [PATCH v9 06/11] gpio: regmap: Allow to allocate regmap-irq device Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250522-mdb-max7360-support-v9-6-74fc03517e41@bootlin.com> References: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> In-Reply-To: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kamel Bouhara , Linus Walleij , Bartosz Golaszewski , Dmitry Torokhov , =?utf-8?q?Uwe_Kleine-K=C3=B6n?= =?utf-8?q?ig?= , Michael Walle , Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, andriy.shevchenko@intel.com, =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747915601; l=2953; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=i7m8T29TZzmU1RLfGhZyxp/Da8X8pEh2theXcp9ZkDA=; b=Xm2QgnKsh5pmY+pZGJwLdnu5KJE7cgqxpIdVZu6LiNIsRCCTHqkVOR1thBKNfjEiNpHLmCJLh L1ksHIeovvBAYlC8eDlSpJ4SiK6aKVShR8/SjnweFJVg+5gnwJDRdVU X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddtgdehleduucdltddurdegfedvrddttddmucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepofgrthhhihgvuhcuffhusghoihhsqdeurhhirghnugcuoehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpedthfegtedvvdehjeeiheehheeuteejleektdefheehgfefgeelhfetgedttdfhteenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgepudenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvfedprhgtphhtthhopegurghkrheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhushdrfigrlhhlvghijheslhhinhgrrhhordhorhhgpdhrtghpthhtoheps ghrohhonhhivgeskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepmhgrthhhihgvuhdrughusghoihhsqdgsrhhirghnugessghoohhtlhhinhdrtghomhdprhgtphhtthhopehthhhomhgrshdrphgvthgriiiiohhnihessghoohhtlhhinhdrtghomhdprhgtphhtthhopegsrhhglhessghguggvvhdrphhlpdhrtghpthhtohepughmihhtrhihrdhtohhrohhkhhhovhesghhmrghilhdrtghomhdprhgtphhtthhopeguvghvihgtvghtrhgvvgesvhhgvghrrdhkvghrnhgvlhdrohhrgh X-GND-Sasl: mathieu.dubois-briand@bootlin.com GPIO controller often have support for IRQ: allow to easily allocate both gpio-regmap and regmap-irq in one operation. Signed-off-by: Mathieu Dubois-Briand --- drivers/gpio/gpio-regmap.c | 21 +++++++++++++++++++-- include/linux/gpio/regmap.h | 11 +++++++++++ 2 files changed, 30 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c index 87c4225784cf..9cbbbaf82609 100644 --- a/drivers/gpio/gpio-regmap.c +++ b/drivers/gpio/gpio-regmap.c @@ -215,6 +215,7 @@ EXPORT_SYMBOL_GPL(gpio_regmap_get_drvdata); */ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config) { + struct irq_domain *irq_domain; struct gpio_regmap *gpio; struct gpio_chip *chip; int ret; @@ -295,8 +296,24 @@ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config if (ret < 0) goto err_free_gpio; - if (config->irq_domain) { - ret = gpiochip_irqchip_add_domain(chip, config->irq_domain); +#ifdef CONFIG_REGMAP_IRQ + if (config->regmap_irq_chip) { + struct regmap_irq_chip_data *irq_chip_data; + + ret = devm_regmap_add_irq_chip_fwnode(config->parent, dev_fwnode(config->parent), + config->regmap, config->regmap_irq_line, + config->regmap_irq_flags, 0, + config->regmap_irq_chip, &irq_chip_data); + if (ret) + goto err_free_gpio; + + irq_domain = regmap_irq_get_domain(irq_chip_data); + } else +#endif + irq_domain = config->irq_domain; + + if (irq_domain) { + ret = gpiochip_irqchip_add_domain(chip, irq_domain); if (ret) goto err_remove_gpiochip; } diff --git a/include/linux/gpio/regmap.h b/include/linux/gpio/regmap.h index c722c67668c6..19b52ac03a5d 100644 --- a/include/linux/gpio/regmap.h +++ b/include/linux/gpio/regmap.h @@ -40,6 +40,11 @@ struct regmap; * @drvdata: (Optional) Pointer to driver specific data which is * not used by gpio-remap but is provided "as is" to the * driver callback(s). + * @regmap_irq_chip: (Optional) Pointer on an regmap_irq_chip structure. If + * set, a regmap-irq device will be created and the IRQ + * domain will be set accordingly. + * @regmap_irq_line (Optional) The IRQ the device uses to signal interrupts. + * @regmap_irq_flags (Optional) The IRQF_ flags to use for the interrupt. * * The ->reg_mask_xlate translates a given base address and GPIO offset to * register and mask pair. The base address is one of the given register @@ -78,6 +83,12 @@ struct gpio_regmap_config { int ngpio_per_reg; struct irq_domain *irq_domain; +#ifdef CONFIG_REGMAP_IRQ + struct regmap_irq_chip *regmap_irq_chip; + int regmap_irq_line; + unsigned long regmap_irq_flags; +#endif + int (*reg_mask_xlate)(struct gpio_regmap *gpio, unsigned int base, unsigned int offset, unsigned int *reg, unsigned int *mask); From patchwork Thu May 22 12:06:22 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Dubois-Briand X-Patchwork-Id: 892306 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 49F0328B4EB; Thu, 22 May 2025 12:06:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747915614; cv=none; b=ftcNj+kPliMfKTgPjLq5Hw8nvPjeJK8qTTTN/Sn+LHhfvcH2+JI8OoCABZeWxJfZymbghy5o9fSh7N0uZT5C11nChN8G40KOTH86Ddy81XvWSmrC24qXB4sB1x6mhkSsf5udsQJ+5shSTYYyp1ZvevBdVZfja18zoP86gjOa1Fg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747915614; c=relaxed/simple; bh=bnqDDSUw67uMCw0TA2I9vpvFQ2UMJGa2QZAL3Fzcc2I=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ehDZziT9BGuDsBIpYTUb9BVax4w6OM/LxxtdvW99x1PCEHyB4xrZ47qCN0iY/QHBply6SgxuohQgg3dkugmCvejSgApMGojWSQz92YEPJA13gRvRRQPlwncZEONK396501QxHrxDN/tRgf2xQZmahDmmJ15vBN1utfJhFc+ZCFo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=YF//cfqJ; arc=none smtp.client-ip=217.70.183.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="YF//cfqJ" Received: by mail.gandi.net (Postfix) with ESMTPSA id C22751FD47; Thu, 22 May 2025 12:06:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1747915610; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=pxO9n7kzYqDZ1mf4RDLfXt3OXq/5RzLLZD0JQyoUnmY=; b=YF//cfqJC5p7ZlbLRcb5dpfikuhnVXgiazR3a21r1Q+mx9ivFd/bnaL079Q5J8YfidKM4x ZInMLKT+bTPtSvNFsjg8jvRPAh/kYwtxDoAKDHHk0bu4+/QL3B1pdxmvr6QxBX8laQuEsm QUuIQ21jW458kvvFevRPqh7OhSiFsz3jwFo9yFJvYQrCbdbkRAA8WX5bJm+57SaZRtpM9L hn7B14xQ7D9VQRfG2T/82a6Ujm4BdHPfzLdaFOCxMrEEVHbqXECmjmZCzFJXr7CUvsUoA9 BsL5zr931WxbLPciPAiR5hBCrwvf27KUItWssa3SZipkjyYKP5e78YDiY0YHWA== From: Mathieu Dubois-Briand Date: Thu, 22 May 2025 14:06:22 +0200 Subject: [PATCH v9 07/11] gpio: regmap: Allow to provide init_valid_mask callback Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250522-mdb-max7360-support-v9-7-74fc03517e41@bootlin.com> References: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> In-Reply-To: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kamel Bouhara , Linus Walleij , Bartosz Golaszewski , Dmitry Torokhov , =?utf-8?q?Uwe_Kleine-K=C3=B6n?= =?utf-8?q?ig?= , Michael Walle , Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, andriy.shevchenko@intel.com, =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand , Andy Shevchenko X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747915601; l=2166; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=bnqDDSUw67uMCw0TA2I9vpvFQ2UMJGa2QZAL3Fzcc2I=; b=b6rm7w4qAB3NTw9DMXVNImQwYa94tW24gaqjzvw+SyxZsNxpAW5Go6Ohu/59IJK8Sj+byJ9fC LKJG6detpJtAHwmF6zPHQwmD2csRVdpj0Tas0pRvu/f55t6WfLM9iMc X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddtgdehleduucdltddurdegfedvrddttddmucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepofgrthhhihgvuhcuffhusghoihhsqdeurhhirghnugcuoehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpedthfegtedvvdehjeeiheehheeuteejleektdefheehgfefgeelhfetgedttdfhteenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgepudenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvgedprhgtphhtthhopegurghkrheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhushdrfigrlhhlvghijheslhhinhgrrhhordhorhhgpdhrtghpthhtoheps ghrohhonhhivgeskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprghnughrihihrdhshhgvvhgthhgvnhhkoheslhhinhhugidrihhnthgvlhdrtghomhdprhgtphhtthhopehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhrtghpthhtohepthhhohhmrghsrdhpvghtrgiiiihonhhisegsohhothhlihhnrdgtohhmpdhrtghpthhtohepsghrghhlsegsghguvghvrdhplhdprhgtphhtthhopegumhhithhrhidrthhorhhokhhhohhvsehgmhgrihhlrdgtohhm X-GND-Sasl: mathieu.dubois-briand@bootlin.com Allows to populate the gpio_regmap_config structure with init_valid_mask() callback to set on the final gpio_chip structure. Reviewed-by: Michael Walle Reviewed-by: Andy Shevchenko Reviewed-by: Linus Walleij Signed-off-by: Mathieu Dubois-Briand --- drivers/gpio/gpio-regmap.c | 1 + include/linux/gpio/regmap.h | 7 +++++++ 2 files changed, 8 insertions(+) diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c index 9cbbbaf82609..3d6a37be6411 100644 --- a/drivers/gpio/gpio-regmap.c +++ b/drivers/gpio/gpio-regmap.c @@ -256,6 +256,7 @@ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config chip->names = config->names; chip->label = config->label ?: dev_name(config->parent); chip->can_sleep = regmap_might_sleep(config->regmap); + chip->init_valid_mask = config->init_valid_mask; chip->request = gpiochip_generic_request; chip->free = gpiochip_generic_free; diff --git a/include/linux/gpio/regmap.h b/include/linux/gpio/regmap.h index 19b52ac03a5d..622a2939ebe0 100644 --- a/include/linux/gpio/regmap.h +++ b/include/linux/gpio/regmap.h @@ -6,6 +6,7 @@ struct device; struct fwnode_handle; struct gpio_regmap; +struct gpio_chip; struct irq_domain; struct regmap; @@ -40,6 +41,8 @@ struct regmap; * @drvdata: (Optional) Pointer to driver specific data which is * not used by gpio-remap but is provided "as is" to the * driver callback(s). + * @init_valid_mask: (Optional) Routine to initialize @valid_mask, to be used + * if not all GPIOs are valid. * @regmap_irq_chip: (Optional) Pointer on an regmap_irq_chip structure. If * set, a regmap-irq device will be created and the IRQ * domain will be set accordingly. @@ -93,6 +96,10 @@ struct gpio_regmap_config { unsigned int offset, unsigned int *reg, unsigned int *mask); + int (*init_valid_mask)(struct gpio_chip *gc, + unsigned long *valid_mask, + unsigned int ngpios); + void *drvdata; }; From patchwork Thu May 22 12:06:23 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Dubois-Briand X-Patchwork-Id: 891806 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5F4BE28B7C8; Thu, 22 May 2025 12:06:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747915616; cv=none; b=L/K69HJaC3Zdh4zV1WeViINKKaSsuc1lPGHh+PlchqXCiTo4V7KZBlAYq40jpOwbL6J7hIoM+rx0TNzGsgLpoIMSmnM8ImkdHpXoyLhuqt+fedjDkyMUOsgEdoqeJ+wjF5ejDYzM47d4NZpSb+b8FkwLaHiebf/iZPY60B2gJuA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747915616; c=relaxed/simple; bh=ph62CXiTAZLzxGextFF9YhOvdfMikE+SYVRFbNnzTSI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=otX0boCRHayioIR6AjHSckzMyNyrMph7OaSNKcgy7Myz3F+qTyoV9o7LcNvyoXmQN32/zgKJll0jZbDAjHCyQXUtZ9Rrxnc+18eI+LqwXt29N41UXuibKPgqelBkTiSi3ozZ7CLx2m6ZAVjYLFYjLIsrsxp2RcRvDlmkQMDJCGY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=Lwn+sOrJ; arc=none smtp.client-ip=217.70.183.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="Lwn+sOrJ" Received: by mail.gandi.net (Postfix) with ESMTPSA id CB2D61FCEA; Thu, 22 May 2025 12:06:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1747915611; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BPidBZWTEjJ0CTeEDfEXh/U7XkGkCBtbH79PRkQHOHs=; b=Lwn+sOrJDI8b6l4xDWmjm7SUeXFMMTwhXZsefo1v4TXQKc7YtnapYEvHAYZp9mzh5h33vr lZdGdi0v2AWPjuu5ZmFCRDzDusvXeGmixnafGb864v7rIKfoMK//z1yh6e8cvTuQSwbXf4 +wSq5N2VK3y1q7ssCszwfJUJWD2EmWcMl9cKSPT0gJ99RPNAjYUMI0BjXjTPVKlOAnwimT P6nAG1sqg7rEMZmXSH3cNKD5tkfILYS6UdRFqlumlLMy+JwuX6okfuNRu0ELxBvKkr2d14 n4eh/f6BYNj7VhIraG34wt7OoRJG8n69ELe91welfFWH7mHVqNSO4LLi5TGaHw== From: Mathieu Dubois-Briand Date: Thu, 22 May 2025 14:06:23 +0200 Subject: [PATCH v9 08/11] gpio: max7360: Add MAX7360 gpio support Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250522-mdb-max7360-support-v9-8-74fc03517e41@bootlin.com> References: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> In-Reply-To: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kamel Bouhara , Linus Walleij , Bartosz Golaszewski , Dmitry Torokhov , =?utf-8?q?Uwe_Kleine-K=C3=B6n?= =?utf-8?q?ig?= , Michael Walle , Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, andriy.shevchenko@intel.com, =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand , Bartosz Golaszewski X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747915601; l=10212; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=ph62CXiTAZLzxGextFF9YhOvdfMikE+SYVRFbNnzTSI=; b=yIsRiOKLBiK7QYfLqcsQKKIkexhxGuQiEHy1rn3IEFDuI0iqcSwHcNQ3wmvlvFwfnIjxvqclS 84P6wAvMhaLBLjhI1Xjpt+NqjXcP9WsL4V+FdLgEdJyviCNG84V08dR X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddtgdehleduucdltddurdegfedvrddttddmucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepofgrthhhihgvuhcuffhusghoihhsqdeurhhirghnugcuoehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpedthfegtedvvdehjeeiheehheeuteejleektdefheehgfefgeelhfetgedttdfhteenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgepudenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvgedprhgtphhtthhopegurghkrheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhushdrfigrlhhlvghijheslhhinhgrrhhordhorhhgpdhrtghpthhtoheps ghrohhonhhivgeskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepmhgrthhhihgvuhdrughusghoihhsqdgsrhhirghnugessghoohhtlhhinhdrtghomhdprhgtphhtthhopehthhhomhgrshdrphgvthgriiiiohhnihessghoohhtlhhinhdrtghomhdprhgtphhtthhopegsrhhglhessghguggvvhdrphhlpdhrtghpthhtohepughmihhtrhihrdhtohhrohhkhhhovhesghhmrghilhdrtghomhdprhgtphhtthhopeguvghvihgtvghtrhgvvgesvhhgvghrrdhkvghrnhgvlhdrohhrgh X-GND-Sasl: mathieu.dubois-briand@bootlin.com Add driver for Maxim Integrated MAX7360 GPIO/GPO controller. Two sets of GPIOs are provided by the device: - Up to 8 GPIOs, shared with the PWM and rotary encoder functionalities. These GPIOs also provide interrupts on input changes. - Up to 6 GPOs, on unused keypad columns pins. Co-developed-by: Kamel Bouhara Signed-off-by: Kamel Bouhara Acked-by: Bartosz Golaszewski Signed-off-by: Mathieu Dubois-Briand --- drivers/gpio/Kconfig | 12 +++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-max7360.c | 257 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 270 insertions(+) diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index f2c39bbff83a..42fae2ff86de 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -1446,6 +1446,18 @@ config GPIO_MADERA help Support for GPIOs on Cirrus Logic Madera class codecs. +config GPIO_MAX7360 + tristate "MAX7360 GPIO support" + depends on MFD_MAX7360 + select GPIO_REGMAP + select REGMAP_IRQ + help + Allows to use MAX7360 I/O Expander PWM lines as GPIO and keypad COL + lines as GPO. + + This driver can also be built as a module. If so, the module will be + called gpio-max7360. + config GPIO_MAX77620 tristate "GPIO support for PMIC MAX77620 and MAX20024" depends on MFD_MAX77620 diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index af130882ffee..b34ecc97bab9 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -103,6 +103,7 @@ obj-$(CONFIG_GPIO_MAX7300) += gpio-max7300.o obj-$(CONFIG_GPIO_MAX7301) += gpio-max7301.o obj-$(CONFIG_GPIO_MAX730X) += gpio-max730x.o obj-$(CONFIG_GPIO_MAX732X) += gpio-max732x.o +obj-$(CONFIG_GPIO_MAX7360) += gpio-max7360.o obj-$(CONFIG_GPIO_MAX77620) += gpio-max77620.o obj-$(CONFIG_GPIO_MAX77650) += gpio-max77650.o obj-$(CONFIG_GPIO_MB86S7X) += gpio-mb86s7x.o diff --git a/drivers/gpio/gpio-max7360.c b/drivers/gpio/gpio-max7360.c new file mode 100644 index 000000000000..db92a43776a9 --- /dev/null +++ b/drivers/gpio/gpio-max7360.c @@ -0,0 +1,257 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2025 Bootlin + * + * Author: Kamel BOUHARA + * Author: Mathieu Dubois-Briand + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MAX7360_GPIO_PORT 1 +#define MAX7360_GPIO_COL 2 + +struct max7360_gpio_plat_data { + unsigned int function; +}; + +static struct max7360_gpio_plat_data max7360_gpio_port_plat = { .function = MAX7360_GPIO_PORT }; +static struct max7360_gpio_plat_data max7360_gpio_col_plat = { .function = MAX7360_GPIO_COL }; + +static int max7360_get_available_gpos(struct device *dev, unsigned int *available_gpios) +{ + u32 columns; + int ret; + + ret = device_property_read_u32(dev->parent, "keypad,num-columns", &columns); + if (ret) { + dev_err(dev, "Failed to read columns count\n"); + return ret; + } + + *available_gpios = min(MAX7360_MAX_GPO, MAX7360_MAX_KEY_COLS - columns); + + return 0; +} + +static int max7360_gpo_init_valid_mask(struct gpio_chip *gc, + unsigned long *valid_mask, + unsigned int ngpios) +{ + unsigned int available_gpios; + int ret; + + ret = max7360_get_available_gpos(gc->parent, &available_gpios); + if (ret) + return ret; + + bitmap_clear(valid_mask, 0, MAX7360_MAX_KEY_COLS - available_gpios); + + return 0; +} + +static int max7360_set_gpos_count(struct device *dev, struct regmap *regmap) +{ + /* + * MAX7360 COL0 to COL7 pins can be used either as keypad columns, + * general purpose output or a mix of both. + * By default, all pins are used as keypad, here we update this + * configuration to allow to use some of them as GPIOs. + */ + unsigned int available_gpios; + unsigned int val; + int ret; + + ret = max7360_get_available_gpos(dev, &available_gpios); + if (ret) + return ret; + + /* + * Configure which GPIOs will be used for keypad. + * MAX7360_REG_DEBOUNCE contains configuration both for keypad debounce + * timings and gpos/keypad columns repartition. Only the later is + * modified here. + */ + val = FIELD_PREP(MAX7360_PORTS, available_gpios); + ret = regmap_write_bits(regmap, MAX7360_REG_DEBOUNCE, MAX7360_PORTS, val); + if (ret) + dev_err(dev, "Failed to write max7360 columns/gpos configuration"); + + return ret; +} + +static int max7360_gpio_reg_mask_xlate(struct gpio_regmap *gpio, + unsigned int base, unsigned int offset, + unsigned int *reg, unsigned int *mask) +{ + if (base == MAX7360_REG_PWMBASE) { + /* + * GPIO output is using PWM duty cycle registers: one register + * per line, with value being either 0 or 255. + */ + *reg = base + offset; + *mask = GENMASK(7, 0); + } else { + *reg = base; + *mask = BIT(offset); + } + + return 0; +} + +static const struct regmap_irq max7360_regmap_irqs[MAX7360_MAX_GPIO] = { + REGMAP_IRQ_REG(0, 0, BIT(0)), + REGMAP_IRQ_REG(1, 0, BIT(1)), + REGMAP_IRQ_REG(2, 0, BIT(2)), + REGMAP_IRQ_REG(3, 0, BIT(3)), + REGMAP_IRQ_REG(4, 0, BIT(4)), + REGMAP_IRQ_REG(5, 0, BIT(5)), + REGMAP_IRQ_REG(6, 0, BIT(6)), + REGMAP_IRQ_REG(7, 0, BIT(7)), +}; + +static int max7360_handle_mask_sync(const int index, + const unsigned int mask_buf_def, + const unsigned int mask_buf, + void *const irq_drv_data) +{ + struct regmap *regmap = irq_drv_data; + int ret; + + for (unsigned int i = 0; i < MAX7360_MAX_GPIO; i++) { + ret = regmap_assign_bits(regmap, MAX7360_REG_PWMCFG(i), + MAX7360_PORT_CFG_INTERRUPT_MASK, mask_buf & BIT(i)); + if (ret) + return ret; + } + + return 0; +} + +static int max7360_gpio_probe(struct platform_device *pdev) +{ + const struct max7360_gpio_plat_data *plat_data; + struct gpio_regmap_config gpio_config = { }; + struct regmap_irq_chip *irq_chip; + struct device *dev = &pdev->dev; + struct regmap *regmap; + unsigned int outconf; + int ret; + + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) + return dev_err_probe(dev, -ENODEV, "could not get parent regmap\n"); + + plat_data = device_get_match_data(dev); + if (plat_data->function == MAX7360_GPIO_PORT) { + if (device_property_read_bool(dev, "interrupt-controller")) { + /* + * Port GPIOs with interrupt-controller property: add IRQ + * controller. + */ + gpio_config.regmap_irq_flags = IRQF_ONESHOT | IRQF_SHARED; + gpio_config.regmap_irq_line = + fwnode_irq_get_byname(dev_fwnode(dev->parent), "inti"); + if (gpio_config.regmap_irq_line < 0) + return dev_err_probe(dev, gpio_config.regmap_irq_line, + "Failed to get IRQ\n"); + + /* Create custom IRQ configuration. */ + irq_chip = devm_kzalloc(dev, sizeof(*irq_chip), GFP_KERNEL); + gpio_config.regmap_irq_chip = irq_chip; + if (!irq_chip) + return -ENOMEM; + + irq_chip->name = dev_name(dev); + irq_chip->status_base = MAX7360_REG_GPIOIN; + irq_chip->status_is_level = true; + irq_chip->num_regs = 1; + irq_chip->num_irqs = MAX7360_MAX_GPIO; + irq_chip->irqs = max7360_regmap_irqs; + irq_chip->handle_mask_sync = max7360_handle_mask_sync; + irq_chip->irq_drv_data = regmap; + + for (unsigned int i = 0; i < MAX7360_MAX_GPIO; i++) { + ret = regmap_write_bits(regmap, MAX7360_REG_PWMCFG(i), + MAX7360_PORT_CFG_INTERRUPT_EDGES, + MAX7360_PORT_CFG_INTERRUPT_EDGES); + if (ret) + return dev_err_probe(dev, ret, + "Failed to enable interrupts\n"); + } + } + + /* + * Port GPIOs: set output mode configuration (constant-current or not). + * This property is optional. + */ + ret = device_property_read_u32(dev, "maxim,constant-current-disable", &outconf); + if (!ret) { + ret = regmap_write(regmap, MAX7360_REG_GPIOOUTM, outconf); + if (ret) + return dev_err_probe(dev, ret, + "Failed to set constant-current configuration\n"); + } + } + + /* Add gpio device. */ + gpio_config.parent = dev; + gpio_config.regmap = regmap; + if (plat_data->function == MAX7360_GPIO_PORT) { + gpio_config.ngpio = MAX7360_MAX_GPIO; + gpio_config.reg_dat_base = GPIO_REGMAP_ADDR(MAX7360_REG_GPIOIN); + gpio_config.reg_set_base = GPIO_REGMAP_ADDR(MAX7360_REG_PWMBASE); + gpio_config.reg_dir_out_base = GPIO_REGMAP_ADDR(MAX7360_REG_GPIOCTRL); + gpio_config.ngpio_per_reg = MAX7360_MAX_GPIO; + gpio_config.reg_mask_xlate = max7360_gpio_reg_mask_xlate; + } else { + ret = max7360_set_gpos_count(dev, regmap); + if (ret) + return dev_err_probe(dev, ret, "Failed to set GPOS pin count\n"); + + gpio_config.reg_set_base = GPIO_REGMAP_ADDR(MAX7360_REG_PORTS); + gpio_config.ngpio = MAX7360_MAX_KEY_COLS; + gpio_config.init_valid_mask = max7360_gpo_init_valid_mask; + } + + return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(dev, &gpio_config)); +} + +static const struct of_device_id max7360_gpio_of_match[] = { + { + .compatible = "maxim,max7360-gpo", + .data = &max7360_gpio_col_plat + }, { + .compatible = "maxim,max7360-gpio", + .data = &max7360_gpio_port_plat + }, { + } +}; +MODULE_DEVICE_TABLE(of, max7360_gpio_of_match); + +static struct platform_driver max7360_gpio_driver = { + .driver = { + .name = "max7360-gpio", + .of_match_table = max7360_gpio_of_match, + }, + .probe = max7360_gpio_probe, +}; +module_platform_driver(max7360_gpio_driver); + +MODULE_DESCRIPTION("MAX7360 GPIO driver"); +MODULE_AUTHOR("Kamel BOUHARA "); +MODULE_AUTHOR("Mathieu Dubois-Briand "); +MODULE_LICENSE("GPL"); From patchwork Thu May 22 12:06:24 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Dubois-Briand X-Patchwork-Id: 892305 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F02D928B7DB; 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Wysocki" , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, andriy.shevchenko@intel.com, =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747915601; l=11626; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=JI3737qpZV5i/n/DYPnkPTfd1V/ujAG4pR1TJ/4gbgo=; b=7poqdLzCGIQPqDBGWhu5JeXQskjoFyC611bkLXTPErSiTLSyIZJQwZ592Smc7412HTiLYl4iB SlG8ymfmganA8prbRPcb3o0zu/uthNqZrllqmV5ZtRIYDtuH21xKsFc X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddtgdehleduucdltddurdegfedvrddttddmucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepofgrthhhihgvuhcuffhusghoihhsqdeurhhirghnugcuoehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpedthfegtedvvdehjeeiheehheeuteejleektdefheehgfefgeelhfetgedttdfhteenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgepudenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvfedprhgtphhtthhopegurghkrheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhushdrfigrlhhlvghijheslhhinhgrrhhordhorhhgpdhrtghpthhtoheps ghrohhonhhivgeskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepmhgrthhhihgvuhdrughusghoihhsqdgsrhhirghnugessghoohhtlhhinhdrtghomhdprhgtphhtthhopehthhhomhgrshdrphgvthgriiiiohhnihessghoohhtlhhinhdrtghomhdprhgtphhtthhopegsrhhglhessghguggvvhdrphhlpdhrtghpthhtohepughmihhtrhihrdhtohhrohhkhhhovhesghhmrghilhdrtghomhdprhgtphhtthhopeguvghvihgtvghtrhgvvgesvhhgvghrrdhkvghrnhgvlhdrohhrgh X-GND-Sasl: mathieu.dubois-briand@bootlin.com Add driver for Maxim Integrated MAX7360 keypad controller, providing support for up to 64 keys, with a matrix of 8 columns and 8 rows. Signed-off-by: Mathieu Dubois-Briand --- drivers/input/keyboard/Kconfig | 12 ++ drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/max7360-keypad.c | 308 ++++++++++++++++++++++++++++++++ 3 files changed, 321 insertions(+) diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 721ab69e84ac..93b5cccf6892 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -421,6 +421,18 @@ config KEYBOARD_MAX7359 To compile this driver as a module, choose M here: the module will be called max7359_keypad. +config KEYBOARD_MAX7360 + tristate "Maxim MAX7360 Key Switch Controller" + select INPUT_MATRIXKMAP + depends on I2C + depends on MFD_MAX7360 + help + If you say yes here you get support for the keypad controller on the + Maxim MAX7360 I/O Expander. + + To compile this driver as a module, choose M here: the module will be + called max7360_keypad. + config KEYBOARD_MPR121 tristate "Freescale MPR121 Touchkey" depends on I2C diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 1e0721c30709..b49d32d4003d 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -42,6 +42,7 @@ obj-$(CONFIG_KEYBOARD_LPC32XX) += lpc32xx-keys.o obj-$(CONFIG_KEYBOARD_MAPLE) += maple_keyb.o obj-$(CONFIG_KEYBOARD_MATRIX) += matrix_keypad.o obj-$(CONFIG_KEYBOARD_MAX7359) += max7359_keypad.o +obj-$(CONFIG_KEYBOARD_MAX7360) += max7360-keypad.o obj-$(CONFIG_KEYBOARD_MPR121) += mpr121_touchkey.o obj-$(CONFIG_KEYBOARD_MT6779) += mt6779-keypad.o obj-$(CONFIG_KEYBOARD_MTK_PMIC) += mtk-pmic-keys.o diff --git a/drivers/input/keyboard/max7360-keypad.c b/drivers/input/keyboard/max7360-keypad.c new file mode 100644 index 000000000000..6bae00e7888b --- /dev/null +++ b/drivers/input/keyboard/max7360-keypad.c @@ -0,0 +1,308 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2025 Bootlin + * + * Author: Mathieu Dubois-Briand + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct max7360_keypad { + struct input_dev *input; + unsigned int rows; + unsigned int cols; + unsigned int debounce_ms; + int irq; + struct regmap *regmap; + unsigned short keycodes[MAX7360_MAX_KEY_ROWS * MAX7360_MAX_KEY_COLS]; +}; + +static irqreturn_t max7360_keypad_irq(int irq, void *data) +{ + struct max7360_keypad *max7360_keypad = data; + struct device *dev = max7360_keypad->input->dev.parent; + unsigned int val; + unsigned int row, col; + unsigned int release; + unsigned int code; + int error; + + error = regmap_read(max7360_keypad->regmap, MAX7360_REG_KEYFIFO, &val); + if (error) { + dev_err(dev, "Failed to read MAX7360 FIFO"); + return IRQ_NONE; + } + + /* FIFO overflow: ignore it and get next event. */ + if (val == MAX7360_FIFO_OVERFLOW) { + dev_warn(dev, "max7360 FIFO overflow"); + error = regmap_read_poll_timeout(max7360_keypad->regmap, MAX7360_REG_KEYFIFO, + val, val != MAX7360_FIFO_OVERFLOW, 0, 1000); + if (error) { + dev_err(dev, "Failed to empty MAX7360 FIFO"); + return IRQ_NONE; + } + } + + if (val == MAX7360_FIFO_EMPTY) { + dev_dbg(dev, "Got a spurious interrupt"); + + return IRQ_NONE; + } + + row = FIELD_GET(MAX7360_FIFO_ROW, val); + col = FIELD_GET(MAX7360_FIFO_COL, val); + release = val & MAX7360_FIFO_RELEASE; + + code = MATRIX_SCAN_CODE(row, col, get_count_order(max7360_keypad->cols)); + + dev_dbg(dev, "key[%d:%d] %s\n", row, col, release ? "release" : "press"); + + input_event(max7360_keypad->input, EV_MSC, MSC_SCAN, code); + input_report_key(max7360_keypad->input, max7360_keypad->keycodes[code], !release); + input_sync(max7360_keypad->input); + + return IRQ_HANDLED; +} + +static int max7360_keypad_open(struct input_dev *pdev) +{ + struct max7360_keypad *max7360_keypad = input_get_drvdata(pdev); + struct device *dev = max7360_keypad->input->dev.parent; + int error; + + /* Somebody is using the device: get out of sleep. */ + error = regmap_write_bits(max7360_keypad->regmap, MAX7360_REG_CONFIG, + MAX7360_CFG_SLEEP, MAX7360_CFG_SLEEP); + if (error) + dev_err(dev, "Failed to write max7360 configuration: %d\n", error); + + return error; +} + +static void max7360_keypad_close(struct input_dev *pdev) +{ + struct max7360_keypad *max7360_keypad = input_get_drvdata(pdev); + struct device *dev = max7360_keypad->input->dev.parent; + int error; + + /* Nobody is using the device anymore: go to sleep. */ + error = regmap_write_bits(max7360_keypad->regmap, MAX7360_REG_CONFIG, MAX7360_CFG_SLEEP, 0); + if (error) + dev_err(dev, "Failed to write max7360 configuration: %d\n", error); +} + +static int max7360_keypad_hw_init(struct max7360_keypad *max7360_keypad) +{ + struct device *dev = max7360_keypad->input->dev.parent; + unsigned int val; + int error; + + val = max7360_keypad->debounce_ms - MAX7360_DEBOUNCE_MIN; + error = regmap_write_bits(max7360_keypad->regmap, MAX7360_REG_DEBOUNCE, + MAX7360_DEBOUNCE, + FIELD_PREP(MAX7360_DEBOUNCE, val)); + if (error) + return dev_err_probe(dev, error, + "Failed to write max7360 debounce configuration\n"); + + error = regmap_write_bits(max7360_keypad->regmap, MAX7360_REG_INTERRUPT, + MAX7360_INTERRUPT_TIME_MASK, + FIELD_PREP(MAX7360_INTERRUPT_TIME_MASK, 1)); + if (error) + return dev_err_probe(dev, error, + "Failed to write max7360 keypad interrupt configuration\n"); + + return 0; +} + +static int max7360_keypad_build_keymap(struct max7360_keypad *max7360_keypad) +{ + struct input_dev *input_dev = max7360_keypad->input; + struct device *dev = input_dev->dev.parent->parent; + struct matrix_keymap_data keymap_data; + const char *propname = "linux,keymap"; + unsigned int max_keys; + int error; + int size; + + size = device_property_count_u32(dev, propname); + if (size <= 0) { + dev_err(dev, "missing or malformed property %s: %d\n", propname, size); + return size < 0 ? size : -EINVAL; + } + + max_keys = max7360_keypad->cols * max7360_keypad->rows; + if (size > max_keys) { + dev_err(dev, "%s size overflow (%d vs max %u)\n", propname, size, max_keys); + return -EINVAL; + } + + u32 *keys __free(kfree) = kmalloc_array(size, sizeof(*keys), GFP_KERNEL); + if (!keys) + return -ENOMEM; + + error = device_property_read_u32_array(dev, propname, keys, size); + if (error) { + dev_err(dev, "failed to read %s property: %d\n", propname, error); + return error; + } + + keymap_data.keymap = keys; + keymap_data.keymap_size = size; + error = matrix_keypad_build_keymap(&keymap_data, NULL, + max7360_keypad->rows, max7360_keypad->cols, + max7360_keypad->keycodes, max7360_keypad->input); + if (error) + return error; + + return 0; +} + +static int max7360_keypad_parse_fw(struct device *dev, + struct max7360_keypad *max7360_keypad, + bool *autorepeat) +{ + int error; + + error = matrix_keypad_parse_properties(dev->parent, &max7360_keypad->rows, + &max7360_keypad->cols); + if (error) + return error; + + if (!max7360_keypad->rows || !max7360_keypad->cols || + max7360_keypad->rows > MAX7360_MAX_KEY_ROWS || + max7360_keypad->cols > MAX7360_MAX_KEY_COLS) { + dev_err(dev, "Invalid number of columns or rows (%ux%u)\n", + max7360_keypad->cols, max7360_keypad->rows); + return -EINVAL; + } + + *autorepeat = device_property_read_bool(dev->parent, "autorepeat"); + + max7360_keypad->debounce_ms = MAX7360_DEBOUNCE_MIN; + error = device_property_read_u32(dev->parent, "keypad-debounce-delay-ms", + &max7360_keypad->debounce_ms); + if (error == -EINVAL) { + dev_info(dev, "Using default keypad-debounce-delay-ms: %u\n", + max7360_keypad->debounce_ms); + } else if (error < 0) { + dev_err(dev, "Failed to read keypad-debounce-delay-ms property\n"); + return error; + } + + if (!in_range(max7360_keypad->debounce_ms, MAX7360_DEBOUNCE_MIN, + MAX7360_DEBOUNCE_MAX - MAX7360_DEBOUNCE_MIN)) { + dev_err(dev, "Invalid keypad-debounce-delay-ms: %u, should be between %u and %u.\n", + max7360_keypad->debounce_ms, MAX7360_DEBOUNCE_MIN, MAX7360_DEBOUNCE_MAX); + return -EINVAL; + } + + return 0; +} + +static int max7360_keypad_probe(struct platform_device *pdev) +{ + struct max7360_keypad *max7360_keypad; + struct device *dev = &pdev->dev; + struct input_dev *input; + struct regmap *regmap; + bool autorepeat; + int error; + int irq; + + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) + return dev_err_probe(dev, -ENODEV, "Could not get parent regmap\n"); + + irq = fwnode_irq_get_byname(dev_fwnode(dev->parent), "intk"); + if (irq < 0) + return dev_err_probe(dev, irq, "Failed to get IRQ\n"); + + max7360_keypad = devm_kzalloc(dev, sizeof(*max7360_keypad), GFP_KERNEL); + if (!max7360_keypad) + return -ENOMEM; + + max7360_keypad->regmap = regmap; + + error = max7360_keypad_parse_fw(dev, max7360_keypad, &autorepeat); + if (error) + return error; + + input = devm_input_allocate_device(dev); + if (!input) + return -ENOMEM; + + max7360_keypad->input = input; + + input->id.bustype = BUS_I2C; + input->name = pdev->name; + input->open = max7360_keypad_open; + input->close = max7360_keypad_close; + + error = max7360_keypad_build_keymap(max7360_keypad); + if (error) + return dev_err_probe(dev, error, "Failed to build keymap\n"); + + input_set_capability(input, EV_MSC, MSC_SCAN); + if (autorepeat) + __set_bit(EV_REP, input->evbit); + + input_set_drvdata(input, max7360_keypad); + + error = devm_request_threaded_irq(dev, irq, NULL, max7360_keypad_irq, + IRQF_ONESHOT, + "max7360-keypad", max7360_keypad); + if (error) + return dev_err_probe(dev, error, "Failed to register interrupt\n"); + + error = input_register_device(input); + if (error) + return dev_err_probe(dev, error, "Could not register input device\n"); + + error = max7360_keypad_hw_init(max7360_keypad); + if (error) + return dev_err_probe(dev, error, "Failed to initialize max7360 keypad\n"); + + device_init_wakeup(dev, true); + error = dev_pm_set_wake_irq(dev, irq); + if (error) + dev_warn(dev, "Failed to set up wakeup irq: %d\n", error); + + return 0; +} + +static void max7360_keypad_remove(struct platform_device *pdev) +{ + dev_pm_clear_wake_irq(&pdev->dev); + device_init_wakeup(&pdev->dev, false); +} + +static struct platform_driver max7360_keypad_driver = { + .driver = { + .name = "max7360-keypad", + }, + .probe = max7360_keypad_probe, + .remove = max7360_keypad_remove, +}; +module_platform_driver(max7360_keypad_driver); + +MODULE_DESCRIPTION("MAX7360 Keypad driver"); +MODULE_AUTHOR("Mathieu Dubois-Briand "); +MODULE_LICENSE("GPL"); From patchwork Thu May 22 12:06:25 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Dubois-Briand X-Patchwork-Id: 891805 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 655CF28BAB5; 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arc=none smtp.client-ip=217.70.183.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="UpDVCCne" Received: by mail.gandi.net (Postfix) with ESMTPSA id C9C081FCF7; Thu, 22 May 2025 12:06:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1747915613; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=miTMLIddELk2REFq4ru4EgvOogHgYu6OpIgiwMjIZsQ=; b=UpDVCCneLP7gW4tZeH5xqx9D65KASMRD1o1lJ1YjqWDhf57DP92u7L0Qt0K5jJa+9HGuU/ jVhF0/1ajVEKQU5khmrfQF46SmNRAS756tqe4BRdLwNwaqT+N+hLCZBt1FLU+cJ1Nwdnio I1F8RXcIl8Ou2XDRUHn+mRW0YY1LOQFrmtsgPYpvkpEEXDCUnCpWkdp0B9kkmk6c0VaJ+y inSd1ikkDsuefzol9VmouMX8tPk1YfoPgINLmmCqApmAFbbrvF1SjF1IReoJIyLSdvWc/5 2GEx2cnxmBeBUfXpEXaUquoTuG6saXAkbBduf1k6+miWn5SRPiSTLaDBF9mOhw== From: Mathieu Dubois-Briand Date: Thu, 22 May 2025 14:06:25 +0200 Subject: [PATCH v9 10/11] input: misc: Add support for MAX7360 rotary Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250522-mdb-max7360-support-v9-10-74fc03517e41@bootlin.com> References: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> In-Reply-To: <20250522-mdb-max7360-support-v9-0-74fc03517e41@bootlin.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kamel Bouhara , Linus Walleij , Bartosz Golaszewski , Dmitry Torokhov , =?utf-8?q?Uwe_Kleine-K=C3=B6n?= =?utf-8?q?ig?= , Michael Walle , Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, andriy.shevchenko@intel.com, =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747915601; l=7670; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=P2mGvxZoG6ZE3Q4kz6QOL2u7zhSCXZBHWICISg35DrE=; b=0ZeW9XGXJJGMxO5+r49DUaj3vdIwGK0X/8Jd+jxwYPniESwS4K22e604DTxKbebO1ss3WmZkL QTLMFY/mz+iAqa3gTXjJaX17eQJ0D6QlcmiVmQohvmCQWU0JYSkQXjX X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddtgdehleduucdltddurdegfedvrddttddmucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepofgrthhhihgvuhcuffhusghoihhsqdeurhhirghnugcuoehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpedthfegtedvvdehjeeiheehheeuteejleektdefheehgfefgeelhfetgedttdfhteenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgepieenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvfedprhgtphhtthhopegurghkrheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhushdrfigrlhhlvghijheslhhinhgrrhhordhorhhgpdhrtghpthhtoheps ghrohhonhhivgeskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepmhgrthhhihgvuhdrughusghoihhsqdgsrhhirghnugessghoohhtlhhinhdrtghomhdprhgtphhtthhopehthhhomhgrshdrphgvthgriiiiohhnihessghoohhtlhhinhdrtghomhdprhgtphhtthhopegsrhhglhessghguggvvhdrphhlpdhrtghpthhtohepughmihhtrhihrdhtohhrohhkhhhovhesghhmrghilhdrtghomhdprhgtphhtthhopeguvghvihgtvghtrhgvvgesvhhgvghrrdhkvghrnhgvlhdrohhrgh X-GND-Sasl: mathieu.dubois-briand@bootlin.com Add driver for Maxim Integrated MAX7360 rotary encoder controller, supporting a single rotary switch. Signed-off-by: Mathieu Dubois-Briand --- drivers/input/misc/Kconfig | 10 ++ drivers/input/misc/Makefile | 1 + drivers/input/misc/max7360-rotary.c | 192 ++++++++++++++++++++++++++++++++++++ 3 files changed, 203 insertions(+) diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index f5496ca0c0d2..0bc9d121c984 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -230,6 +230,16 @@ config INPUT_M68K_BEEP tristate "M68k Beeper support" depends on M68K +config INPUT_MAX7360_ROTARY + tristate "Maxim MAX7360 Rotary Encoder" + depends on MFD_MAX7360 + help + If you say yes here you get support for the rotary encoder on the + Maxim MAX7360 I/O Expander. + + To compile this driver as a module, choose M here: the module will be + called max7360_rotary. + config INPUT_MAX77650_ONKEY tristate "Maxim MAX77650 ONKEY support" depends on MFD_MAX77650 diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 6d91804d0a6f..c454fba3a3ae 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_INPUT_IQS7222) += iqs7222.o obj-$(CONFIG_INPUT_KEYSPAN_REMOTE) += keyspan_remote.o obj-$(CONFIG_INPUT_KXTJ9) += kxtj9.o obj-$(CONFIG_INPUT_M68K_BEEP) += m68kspkr.o +obj-$(CONFIG_INPUT_MAX7360_ROTARY) += max7360-rotary.o obj-$(CONFIG_INPUT_MAX77650_ONKEY) += max77650-onkey.o obj-$(CONFIG_INPUT_MAX77693_HAPTIC) += max77693-haptic.o obj-$(CONFIG_INPUT_MAX8925_ONKEY) += max8925_onkey.o diff --git a/drivers/input/misc/max7360-rotary.c b/drivers/input/misc/max7360-rotary.c new file mode 100644 index 000000000000..b7f46cbd5400 --- /dev/null +++ b/drivers/input/misc/max7360-rotary.c @@ -0,0 +1,192 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2025 Bootlin + * + * Author: Mathieu Dubois-Briand + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MAX7360_ROTARY_DEFAULT_STEPS 24 + +struct max7360_rotary { + struct input_dev *input; + struct regmap *regmap; + unsigned int debounce_ms; + + unsigned int pos; + + u32 steps; + u32 axis; + bool relative_axis; + bool rollover; +}; + +static void max7360_rotaty_report_event(struct max7360_rotary *max7360_rotary, int steps) +{ + if (max7360_rotary->relative_axis) { + input_report_rel(max7360_rotary->input, max7360_rotary->axis, steps); + } else { + int pos = max7360_rotary->pos; + int maxval = max7360_rotary->steps; + + /* + * Add steps to the position. + * Make sure added steps are always in ]-maxval; maxval[ + * interval, so (pos + maxval) is always >= 0. + * Then set back pos to the [0; maxval[ interval. + */ + pos += steps % maxval; + if (max7360_rotary->rollover) + pos = (pos + maxval) % maxval; + else + pos = clamp(pos, 0, maxval); + + max7360_rotary->pos = pos; + input_report_abs(max7360_rotary->input, max7360_rotary->axis, max7360_rotary->pos); + } + + input_sync(max7360_rotary->input); +} + +static irqreturn_t max7360_rotary_irq(int irq, void *data) +{ + struct max7360_rotary *max7360_rotary = data; + struct device *dev = max7360_rotary->input->dev.parent; + unsigned int val; + int error; + + error = regmap_read(max7360_rotary->regmap, MAX7360_REG_RTR_CNT, &val); + if (error < 0) { + dev_err(dev, "Failed to read rotary counter\n"); + return IRQ_NONE; + } + + if (val == 0) + return IRQ_NONE; + + max7360_rotaty_report_event(max7360_rotary, sign_extend32(val, 7)); + + return IRQ_HANDLED; +} + +static int max7360_rotary_hw_init(struct max7360_rotary *max7360_rotary) +{ + struct device *dev = max7360_rotary->input->dev.parent; + int val; + int error; + + val = FIELD_PREP(MAX7360_ROT_DEBOUNCE, max7360_rotary->debounce_ms) | + FIELD_PREP(MAX7360_ROT_INTCNT, 1) | MAX7360_ROT_INTCNT_DLY; + error = regmap_write(max7360_rotary->regmap, MAX7360_REG_RTRCFG, val); + if (error) + dev_err(dev, "Failed to set max7360 rotary encoder configuration\n"); + + return error; +} + +static int max7360_rotary_probe(struct platform_device *pdev) +{ + struct max7360_rotary *max7360_rotary; + struct device *dev = &pdev->dev; + struct input_dev *input; + struct regmap *regmap; + int irq; + int error; + + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) + return dev_err_probe(dev, -ENODEV, "Could not get parent regmap\n"); + + irq = fwnode_irq_get_byname(dev_fwnode(dev->parent), "inti"); + if (irq < 0) + return dev_err_probe(dev, irq, "Failed to get IRQ\n"); + + max7360_rotary = devm_kzalloc(dev, sizeof(*max7360_rotary), GFP_KERNEL); + if (!max7360_rotary) + return -ENOMEM; + + max7360_rotary->regmap = regmap; + + device_property_read_u32(dev->parent, "linux,axis", &max7360_rotary->axis); + max7360_rotary->rollover = device_property_read_bool(dev->parent, + "rotary-encoder,rollover"); + max7360_rotary->relative_axis = + device_property_read_bool(dev->parent, "rotary-encoder,relative-axis"); + + error = device_property_read_u32(dev->parent, "rotary-encoder,steps", + &max7360_rotary->steps); + if (error) + max7360_rotary->steps = MAX7360_ROTARY_DEFAULT_STEPS; + + device_property_read_u32(dev->parent, "rotary-debounce-delay-ms", + &max7360_rotary->debounce_ms); + if (max7360_rotary->debounce_ms > MAX7360_ROT_DEBOUNCE_MAX) + return dev_err_probe(dev, -EINVAL, "Invalid debounce timing: %u\n", + max7360_rotary->debounce_ms); + + input = devm_input_allocate_device(dev); + if (!input) + return -ENOMEM; + + max7360_rotary->input = input; + + input->id.bustype = BUS_I2C; + input->name = pdev->name; + + if (max7360_rotary->relative_axis) + input_set_capability(input, EV_REL, max7360_rotary->axis); + else + input_set_abs_params(input, max7360_rotary->axis, 0, max7360_rotary->steps, 0, 1); + + error = devm_request_threaded_irq(dev, irq, NULL, max7360_rotary_irq, + IRQF_ONESHOT | IRQF_SHARED, + "max7360-rotary", max7360_rotary); + if (error) + return dev_err_probe(dev, error, "Failed to register interrupt\n"); + + error = input_register_device(input); + if (error) + return dev_err_probe(dev, error, "Could not register input device\n"); + + error = max7360_rotary_hw_init(max7360_rotary); + if (error) + return dev_err_probe(dev, error, "Failed to initialize max7360 rotary\n"); + + device_init_wakeup(dev, true); + error = dev_pm_set_wake_irq(dev, irq); + if (error) + dev_warn(dev, "Failed to set up wakeup irq: %d\n", error); + + return 0; +} + +static void max7360_rotary_remove(struct platform_device *pdev) +{ + dev_pm_clear_wake_irq(&pdev->dev); + device_init_wakeup(&pdev->dev, false); +} + +static struct platform_driver max7360_rotary_driver = { + .driver = { + .name = "max7360-rotary", + }, + .probe = max7360_rotary_probe, + .remove = max7360_rotary_remove, +}; +module_platform_driver(max7360_rotary_driver); + +MODULE_DESCRIPTION("MAX7360 Rotary driver"); +MODULE_AUTHOR("Mathieu Dubois-Briand "); +MODULE_LICENSE("GPL"); From patchwork Thu May 22 12:06:26 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Dubois-Briand X-Patchwork-Id: 892304 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 59D6F28C017; 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Wysocki" , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, andriy.shevchenko@intel.com, =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747915601; l=1082; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=TKtExURtBBoXKlQbeQ8pWXApgKHf6ZVWdlros+uARmM=; b=bI5cST6pMne/Waha6dchjwdoLVKlx86LbpIG78Lj/OuTn1+i4RkUegP2u9FTefys413Vz3LdK e12hHUDjPqkBuybg1ZG54jffj0yjC3kMFzaLvK54gy0oh6MBnYAtO/X X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddtgdehleduucdltddurdegfedvrddttddmucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepofgrthhhihgvuhcuffhusghoihhsqdeurhhirghnugcuoehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpedthfegtedvvdehjeeiheehheeuteejleektdefheehgfefgeelhfetgedttdfhteenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgepieenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvfedprhgtphhtthhopegurghkrheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhushdrfigrlhhlvghijheslhhinhgrrhhordhorhhgpdhrtghpthhtoheps ghrohhonhhivgeskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepmhgrthhhihgvuhdrughusghoihhsqdgsrhhirghnugessghoohhtlhhinhdrtghomhdprhgtphhtthhopehthhhomhgrshdrphgvthgriiiiohhnihessghoohhtlhhinhdrtghomhdprhgtphhtthhopegsrhhglhessghguggvvhdrphhlpdhrtghpthhtohepughmihhtrhihrdhtohhrohhkhhhovhesghhmrghilhdrtghomhdprhgtphhtthhopeguvghvihgtvghtrhgvvgesvhhgvghrrdhkvghrnhgvlhdrohhrgh X-GND-Sasl: mathieu.dubois-briand@bootlin.com Add myself as maintainer of Maxim MAX7360 driver and device-tree bindings. Signed-off-by: Mathieu Dubois-Briand --- MAINTAINERS | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 69511c3b2b76..7e6d95ee103c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14576,6 +14576,19 @@ L: linux-iio@vger.kernel.org S: Maintained F: drivers/iio/temperature/max30208.c +MAXIM MAX7360 KEYPAD LED MFD DRIVER +M: Mathieu Dubois-Briand +S: Maintained +F: Documentation/devicetree/bindings/gpio/maxim,max7360-gpio.yaml +F: Documentation/devicetree/bindings/mfd/maxim,max7360.yaml +F: drivers/gpio/gpio-max7360.c +F: drivers/input/keyboard/max7360-keypad.c +F: drivers/input/misc/max7360-rotary.c +F: drivers/mfd/max7360.c +F: drivers/pinctrl/pinctrl-max7360.c +F: drivers/pwm/pwm-max7360.c +F: include/linux/mfd/max7360.h + MAXIM MAX77650 PMIC MFD DRIVER M: Bartosz Golaszewski L: linux-kernel@vger.kernel.org