From patchwork Wed Apr 9 14:55:58 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: 879419 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 4FED626F47B; Wed, 9 Apr 2025 14:56:52 +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=1744210616; cv=none; b=YQz7UVfZjbPyPlaoB/Q0jshH2/UbGFvYiKqP9NxLpAd6CHsYR3JUHhtKSYRCP6bUQbc1iU+q40xtIhSPOKLvSN4ddlEsPcjrO/Wnkc0nyF/77SC66hpHOriY9LJ6hCdhDlLpTE5FnSbBZFQ+0iK3SNP+sxr3OYP1KVuFbANcQdc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744210616; c=relaxed/simple; bh=aJO8Mzk9jqoUgslMt5Ov3h4NkraRm02fXKDkQ4tTo/A=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Wvv1LvPColGss5i+uIahU45lrtRTMi3KW1cIguqpxGy/kGFGQETMJlh82Xr2/PvM/iQjzqaslL9x+xwxa+wwPDXU0Gv9g6WQ2EMb53DWkOg0Qr8p1/JyCTWzIqKsQAhOfW47MpOIGadL93VfHfC8Q8zl4ucx8R9z6AMf0GTW1+8= 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=RhwA0AHe; 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="RhwA0AHe" Received: by mail.gandi.net (Postfix) with ESMTPSA id D076520452; Wed, 9 Apr 2025 14:56:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1744210611; 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=oDZnlgkfrOjp1KMdtH8u5UsT+YGkGHfhd3XXCO5CdQU=; b=RhwA0AHe94Soxnm1nAvwVB1mK9pjcNd2GrWngltPbfGrn3aU1QLipiDrscOmv3dCy2iozg r/JvyfMZoeCTLKk7MJ10B22SVJ8Hqm9qt4jpw9Mom9+CHtMVAQveC92364GEkXftPLL0Q5 7Tfroyq0u/0G3DemjLpdpbTxYBq/gUkDt0W66YWaPRbuysI8RxpZhtCgxCXJXOdHSnqNdX sStc33JdmXVZIrP5EU/bXmOXZhLDrUokRBACyjEqFbd5GNjs7ihq+OsmcwX33oRbsKebiZ IFedrm6QHjTmsQqsexikQ+kFkW6fqj6hR3vk5XGsg+ZzJnXI+PUbAAorE8KN/Q== From: Mathieu Dubois-Briand Date: Wed, 09 Apr 2025 16:55:58 +0200 Subject: [PATCH v6 11/12] input: misc: Add support for MAX7360 rotary Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250409-mdb-max7360-support-v6-11-7a2535876e39@bootlin.com> References: <20250409-mdb-max7360-support-v6-0-7a2535876e39@bootlin.com> In-Reply-To: <20250409-mdb-max7360-support-v6-0-7a2535876e39@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=1744210599; l=6184; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=aJO8Mzk9jqoUgslMt5Ov3h4NkraRm02fXKDkQ4tTo/A=; b=045QUsUquJqCkwMD89m3gBatHnGGB8L8+F6lnsGYgXcVhdlzvbmPQ4bdT0Fnkkq6sOKbp5/Ik QiXhkdrs22ZBqm4V1e5n6PHt2O37BdWgHYGvnYsjAi3AW7yKYmBa4cC 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: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgddvtdeivdelucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepofgrthhhihgvuhcuffhusghoihhsqdeurhhirghnugcuoehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpedthfegtedvvdehjeeiheehheeuteejleektdefheehgfefgeelhfetgedttdfhteenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgepvdenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvfedprhgtphhtthhopehthhhomhgrshdrphgvthgriiiiohhnihessghoohhtlhhinhdrtghomhdprhgtphhtthhopehlvggvsehkvghrnhgvlhdrohhrghdprhgtphhtthhopegsrhhoohhnihgvs ehkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhgphhiohesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehukhhlvghinhgvkheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqphifmhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopeguvghvihgtvghtrhgvvgesvhhgvghrrdhkvghrnhgvlhdrohhrgh 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 | 148 ++++++++++++++++++++++++++++++++++++ 3 files changed, 159 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..c9630e79730a --- /dev/null +++ b/drivers/input/misc/max7360-rotary.c @@ -0,0 +1,148 @@ +// 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 + +struct max7360_rotary { + u32 axis; + struct input_dev *input; + unsigned int debounce_ms; + struct regmap *regmap; +}; + +static irqreturn_t max7360_rotary_irq(int irq, void *data) +{ + struct max7360_rotary *max7360_rotary = data; + unsigned int val; + int ret; + + ret = regmap_read(max7360_rotary->regmap, MAX7360_REG_RTR_CNT, &val); + if (ret < 0) { + dev_err(&max7360_rotary->input->dev, + "Failed to read rotary counter\n"); + return IRQ_NONE; + } + + if (val == 0) { + dev_dbg(&max7360_rotary->input->dev, + "Got a spurious interrupt\n"); + + return IRQ_NONE; + } + + input_report_rel(max7360_rotary->input, max7360_rotary->axis, sign_extend32(val, 7)); + input_sync(max7360_rotary->input); + + return IRQ_HANDLED; +} + +static int max7360_rotary_hw_init(struct max7360_rotary *max7360_rotary) +{ + int val; + int ret; + + val = FIELD_PREP(MAX7360_ROT_DEBOUNCE, max7360_rotary->debounce_ms) | + FIELD_PREP(MAX7360_ROT_INTCNT, 1) | MAX7360_ROT_INTCNT_DLY; + ret = regmap_write(max7360_rotary->regmap, MAX7360_REG_RTRCFG, val); + if (ret) + dev_err(&max7360_rotary->input->dev, + "Failed to set max7360 rotary encoder configuration\n"); + + return ret; +} + +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 ret; + + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) + 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); + 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; + input->dev.parent = dev; + + input_set_capability(input, EV_REL, max7360_rotary->axis); + + ret = devm_request_threaded_irq(dev, irq, NULL, max7360_rotary_irq, + IRQF_ONESHOT | IRQF_SHARED, + "max7360-rotary", max7360_rotary); + if (ret) + return dev_err_probe(dev, ret, "Failed to register interrupt\n"); + + ret = input_register_device(input); + if (ret) + return dev_err_probe(dev, ret, "Could not register input device\n"); + + ret = max7360_rotary_hw_init(max7360_rotary); + if (ret) + return dev_err_probe(dev, ret, "Failed to initialize max7360 rotary\n"); + + device_init_wakeup(dev, true); + ret = dev_pm_set_wake_irq(dev, irq); + if (ret) + dev_warn(dev, "Failed to set up wakeup irq: %d\n", ret); + + return 0; +} + +static void max7360_rotary_remove(struct platform_device *pdev) +{ + dev_pm_clear_wake_irq(&pdev->dev); +} + +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");