From patchwork Sat Feb 17 23:09:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abdel Alkuor X-Patchwork-Id: 775021 Received: from mail-oi1-f174.google.com (mail-oi1-f174.google.com [209.85.167.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6624B7F7F6; Sat, 17 Feb 2024 23:11:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.174 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708211510; cv=none; b=Hif5VlGJwidLGe5BmevWLK2Y6/T+BQayoe2I+7HXZepE97HOGNGoQEXkGR8Iih8gOF6AhZiPJtOhrCe8myvQUFxJcm3uRk/99mwD/Sm5VJvivOL0FIg7cjWJ61XhG7ZHWp1WnDmmV/vQ45Y2JX/7euXu+F5hWFaL7FAydpoDdr0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708211510; c=relaxed/simple; bh=PuY7CoHelqqxMR2WY2gwHQsUwUn4HmGDxqITqw8g0+4=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=aJeCbAdf5E8JvlYBR2Xpi0m7CGr6516S38yOWe+Mmzp+pPu+80o5hJ6XksX/6LaqpaVpqOAH6AVgb8qloCGx12yUkCKtpaiPgSdKzRBG5f756VnD4oy5f2JfQLS4zoRM4J26kJH6wgc9Cn1xIHMZMUp7DNDcNWNIChi8rqPbFQs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=ldZBVex4; arc=none smtp.client-ip=209.85.167.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ldZBVex4" Received: by mail-oi1-f174.google.com with SMTP id 5614622812f47-3c031776e0cso1468688b6e.0; Sat, 17 Feb 2024 15:11:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1708211506; x=1708816306; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=UTpDENxTy13x+lQaGg96zVTVcyV5n3Aze00u7CsdzkA=; b=ldZBVex4xOVTGVHt8Z4VWYxNKFpqcGvpDqBm4aDLFeMx3aQ5gW3ehPML6Dt8n1UgGA /I4LGRwgKgNaCSlt9EocLzq96dqkh0VgK7pLr7Yr/4G4BTS/kba3mlJ8ivFYK4x/epY7 YZ5YuFaap743pt0Hm0r9L0yKeur3pKoc9/VgsKR81C3MKCRpv/qaNLplTaOUF7ATcvI5 rDYKLxXgIptyhZ37gO4Keq9gZ6gMHuAmUyJq3vZHVA3ih69ClYQv53qMiFJ2mbpQRHJ2 /x0fnmDRElJECGwJjXvSOLgicK/9a/5GTWqsf8XPTF26Jf4ZSZeqeygTvxkUpy22iT3W FihA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708211506; x=1708816306; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=UTpDENxTy13x+lQaGg96zVTVcyV5n3Aze00u7CsdzkA=; b=nnkSiiKJBEOoOp06390xSP0xAJe5tKU5xBzlmJRbVqRzTj27HLHN7r2xxF/OggcJW3 elpGs7IBnwpDlGd5HPwDOv7CdoUYQnE8HeM6NuPavLHirg7doXYWj3J1Rjw9X/l6loEe bSTqE4TUdvhTrMC57oYlnmTd+YtfpVr8wIdrLImvbBJIwvza7TYRuLcasDU22S7UyU0q muTjR0vHP81l38p5j9cfeddFYiznZsDvnanUnHiLFNd9xRbS2aAVBL6GTIokbl8FbtZz ghTVj26MbFx4RdfzXYHRH1Y+6GgeD8YjYzoTRw+FTl3Wr1mL2KFevbcNhj4AKUibHhcW sdWw== X-Forwarded-Encrypted: i=1; AJvYcCWJ5jgFo5El8BxCBSm7o+WjrO/QS+fdMM4Pk0LhsNK2/x34mMaZ0vH/8xtVKKjXrcGANr1wqj7lLtwl3UyYJDnr/lAiLE4Itnel6NSX5aUEdklOZPmaYLyfizyrqcOsa5Lxd+z+OszCqFxq9B/2m8E/WQBJdlQG1ltwF3EiVnNve9uocUc= X-Gm-Message-State: AOJu0Yy4K1dsML1EqPkOZmX2Ekv11MdcOMMsC86eCjQ8eyNa6UnFUWx4 2dNpRqAH7U9DAYnLeQ+4I5Qlvpqe9ELRoNSYOOt4l1x5ueJp3MLN X-Google-Smtp-Source: AGHT+IH3xtn5XaR26I2MvrkXUFytQJ/WmPbjn4uLt2QfC/qqbLozRjGEDlCdRW6MKpu235MF0H5fQw== X-Received: by 2002:a05:6808:2e87:b0:3c1:41fc:d012 with SMTP id gt7-20020a0568082e8700b003c141fcd012mr7150189oib.34.1708211506366; Sat, 17 Feb 2024 15:11:46 -0800 (PST) Received: from localhost.localdomain ([174.95.13.129]) by smtp.gmail.com with ESMTPSA id lu8-20020a0562145a0800b0068cc837fa1asm1503506qvb.53.2024.02.17.15.11.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 17 Feb 2024 15:11:45 -0800 (PST) From: Abdel Alkuor To: Pavel Machek , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Abdel Alkuor , =?utf-8?q?Andr=C3=A9_Apitzsch?= , Jacek Anaszewski , ChiYuan Huang , Lukas Bulwahn , Jean-Jacques Hiblot Cc: ChiaEn Wu , Alice Chen , linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] dt-bindings: leds: Add NCP5623 multi-LED Controller Date: Sat, 17 Feb 2024 18:09:19 -0500 Message-Id: <20240217230956.630522-1-alkuor@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-leds@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 NCP5623 is DC-DC multi-LED controller which can be used for RGB illumination or backlight LCD display. Signed-off-by: Abdel Alkuor --- Changes in v2: - Fix commit subject prefix - drop | from the main description - Use const in address reg - Remove LEDs reg description - Link to v1: https://lore.kernel.org/linux-kernel/20240208130115.GM689448@google.com/T/ .../bindings/leds/onnn,ncp5623.yaml | 96 +++++++++++++++++++ 1 file changed, 96 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/onnn,ncp5623.yaml diff --git a/Documentation/devicetree/bindings/leds/onnn,ncp5623.yaml b/Documentation/devicetree/bindings/leds/onnn,ncp5623.yaml new file mode 100644 index 000000000000..9c9f3a682ba2 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/onnn,ncp5623.yaml @@ -0,0 +1,96 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/onnn,ncp5623.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ON Semiconductor NCP5623 multi-LED Driver + +maintainers: + - Abdel Alkuor + +description: + NCP5623 Triple Output I2C Controlled LED Driver. + https://www.onsemi.com/pdf/datasheet/ncp5623-d.pdf + +properties: + compatible: + enum: + - onnn,ncp5623 + + reg: + const: 0x38 + + multi-led: + type: object + $ref: leds-class-multicolor.yaml# + unevaluatedProperties: false + + properties: + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + patternProperties: + "^led@[0-2]$": + type: object + $ref: common.yaml# + unevaluatedProperties: false + + properties: + reg: + minimum: 0 + maximum: 2 + + required: + - reg + - color + + required: + - "#address-cells" + - "#size-cells" + +required: + - compatible + - reg + - multi-led + +additionalProperties: false + +examples: + - | + #include + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + led-controller@38 { + compatible = "onnn,ncp5623"; + reg = <0x38>; + + multi-led { + color = ; + + #address-cells = <1>; + #size-cells = <0>; + + led@0 { + reg = <0>; + color = ; + }; + + led@1 { + reg = <1>; + color = ; + }; + + led@2 { + reg = <2>; + color = ; + }; + }; + }; + }; From patchwork Sat Feb 17 23:09:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abdel Alkuor X-Patchwork-Id: 773857 Received: from mail-qv1-f41.google.com (mail-qv1-f41.google.com [209.85.219.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 12E937E567; Sat, 17 Feb 2024 23:12:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.41 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708211526; cv=none; b=DnAtENOEgHUAuGvPrEvrMXX4zZSDSSrH4+h5ISl1IrXX5Zx1mvFiI4JU8xDZB4YYNh5dExapktpdsse1iay9D3nMNEeD8tXp3yk3n2Y646IUrsbeetAiKDHwxUPrQ1M4S8sr/Yqh/YiaY5qlQ9pRaYHSb3F4YJ7FlyG6yPPByec= ARC-Message-Signature: i=1; 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Sat, 17 Feb 2024 15:12:02 -0800 (PST) From: Abdel Alkuor To: Pavel Machek , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alice Chen , Jean-Jacques Hiblot , ChiYuan Huang , ChiaEn Wu , Lukas Bulwahn , =?utf-8?q?Andr=C3=A9_Apitzsch?= , Abdel Alkuor Cc: linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/2] leds: Add NCP5623 multi-led driver Date: Sat, 17 Feb 2024 18:09:20 -0500 Message-Id: <20240217230956.630522-2-alkuor@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240217230956.630522-1-alkuor@gmail.com> References: <20240217230956.630522-1-alkuor@gmail.com> Precedence: bulk X-Mailing-List: linux-leds@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 NCP5623 is DC-DC multi-LEDs driver which has three PWMs that can be programmed up to 32 steps giving 32768 colors hue. NCP5623 driver supports gradual dimming upward/downward with programmable delays. Also, the driver supports driving a single LED or multi-LED like RGB. Signed-off-by: Abdel Alkuor --- Changes in v2: - Remove all custom attributes and use hw pattern instead - Remove filename from the driver description - Fix coding style - Destroy the muttex in shutdown callback - Register mcled device using none devm version as unregistering mcled device calls ncp5632_set_led which uses mutex hence we need to make sure the mutex is still available during the unregistering process. - Link to v1: https://lore.kernel.org/linux-kernel/20240208130115.GM689448@google.com/T/ drivers/leds/rgb/Kconfig | 11 ++ drivers/leds/rgb/Makefile | 1 + drivers/leds/rgb/leds-ncp5623.c | 257 ++++++++++++++++++++++++++++++++ 3 files changed, 269 insertions(+) create mode 100644 drivers/leds/rgb/leds-ncp5623.c diff --git a/drivers/leds/rgb/Kconfig b/drivers/leds/rgb/Kconfig index a6a21f564673..81ab6a526a78 100644 --- a/drivers/leds/rgb/Kconfig +++ b/drivers/leds/rgb/Kconfig @@ -27,6 +27,17 @@ config LEDS_KTD202X To compile this driver as a module, choose M here: the module will be called leds-ktd202x. +config LEDS_NCP5623 + tristate "LED support for NCP5623" + depends on I2C + depends on OF + help + This option enables support for ON semiconductor NCP5623 + Triple Output I2C Controlled RGB LED Driver. + + To compile this driver as a module, choose M here: the module + will be called leds-ncp5623. + config LEDS_PWM_MULTICOLOR tristate "PWM driven multi-color LED Support" depends on PWM diff --git a/drivers/leds/rgb/Makefile b/drivers/leds/rgb/Makefile index 243f31e4d70d..a501fd27f179 100644 --- a/drivers/leds/rgb/Makefile +++ b/drivers/leds/rgb/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_LEDS_GROUP_MULTICOLOR) += leds-group-multicolor.o obj-$(CONFIG_LEDS_KTD202X) += leds-ktd202x.o +obj-$(CONFIG_LEDS_NCP5623) += leds-ncp5623.o obj-$(CONFIG_LEDS_PWM_MULTICOLOR) += leds-pwm-multicolor.o obj-$(CONFIG_LEDS_QCOM_LPG) += leds-qcom-lpg.o obj-$(CONFIG_LEDS_MT6370_RGB) += leds-mt6370-rgb.o diff --git a/drivers/leds/rgb/leds-ncp5623.c b/drivers/leds/rgb/leds-ncp5623.c new file mode 100644 index 000000000000..5a5c770bb61e --- /dev/null +++ b/drivers/leds/rgb/leds-ncp5623.c @@ -0,0 +1,257 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * NCP5623 Multi-LED Driver + * + * Author: Abdel Alkuor + * Datasheet: https://www.onsemi.com/pdf/datasheet/ncp5623-d.pdf + */ + +#include +#include + +#include + +#define NCP5623_REG(x) ((x) << 0x5) + +#define NCP5623_SHUTDOWN_REG NCP5623_REG(0x0) +#define NCP5623_ILED_REG NCP5623_REG(0x1) +#define NCP5623_PWM_REG(index) NCP5623_REG(0x2 + (index)) +#define NCP5623_UPWARD_STEP_REG NCP5623_REG(0x5) +#define NCP5623_DOWNWARD_STEP_REG NCP5623_REG(0x6) +#define NCP5623_DIMMING_TIME_REG NCP5623_REG(0x7) + +#define NCP5623_MAX_BRIGHTNESS 0x1f + +struct ncp5623 { + struct i2c_client *client; + struct led_classdev_mc mc_dev; + struct mutex lock; + + int old_brightness; + unsigned long delay; +}; + +static int ncp5623_write(struct i2c_client *client, u8 reg, u8 data) +{ + return i2c_smbus_write_byte_data(client, reg | data, 0); +} + +static int ncp5623_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev); + struct ncp5623 *ncp = container_of(mc_cdev, struct ncp5623, mc_dev); + int ret; + + guard(mutex)(&ncp->lock); + + if (ncp->delay && time_is_after_jiffies(ncp->delay)) + return -EBUSY; + + ncp->delay = 0; + + for (int i = 0; i < mc_cdev->num_colors; i++) { + ret = ncp5623_write(ncp->client, + NCP5623_PWM_REG(mc_cdev->subled_info[i].channel), + min(mc_cdev->subled_info[i].intensity, + NCP5623_MAX_BRIGHTNESS)); + if (ret) + return ret; + } + + ret = ncp5623_write(ncp->client, NCP5623_DIMMING_TIME_REG, 0); + if (ret) + return ret; + + ret = ncp5623_write(ncp->client, NCP5623_ILED_REG, brightness); + if (ret) + return ret; + + ncp->old_brightness = brightness; + + return 0; +} + +static int ncp5623_pattern_set(struct led_classdev *cdev, + struct led_pattern *pattern, + u32 len, int repeat) +{ + struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev); + struct ncp5623 *ncp = container_of(mc_cdev, struct ncp5623, mc_dev); + int brightness_diff; + u8 reg; + int ret; + + guard(mutex)(&ncp->lock); + + if (ncp->delay && time_is_after_jiffies(ncp->delay)) + return -EBUSY; + + ncp->delay = 0; + + if (pattern[0].delta_t > 240 || (pattern[0].delta_t % 8) != 0) + return -EINVAL; + + brightness_diff = pattern[0].brightness - ncp->old_brightness; + + if (brightness_diff == 0) + return 0; + + if (pattern[0].delta_t) { + if (brightness_diff > 0) + reg = NCP5623_UPWARD_STEP_REG; + else + reg = NCP5623_DOWNWARD_STEP_REG; + } else { + reg = NCP5623_ILED_REG; + } + + ret = ncp5623_write(ncp->client, reg, + min(pattern[0].brightness, NCP5623_MAX_BRIGHTNESS)); + if (ret) + return ret; + + ret = ncp5623_write(ncp->client, + NCP5623_DIMMING_TIME_REG, pattern[0].delta_t / 8); + if (ret) + return ret; + + if (abs(brightness_diff) == 1) + ncp->delay = NCP5623_MAX_BRIGHTNESS + brightness_diff; + else + ncp->delay = abs(brightness_diff); + + ncp->delay = msecs_to_jiffies(ncp->delay * pattern[0].delta_t) + jiffies; + + ncp->old_brightness = pattern[0].brightness; + + return 0; +} + +static int ncp5623_pattern_clear(struct led_classdev *led_cdev) +{ + return 0; +} + +static int ncp5623_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct fwnode_handle *mc_node, *led_node; + struct led_init_data init_data = { }; + int num_subleds = 0; + struct ncp5623 *ncp; + struct mc_subled *subled_info; + u32 color_index; + u32 reg; + int ret; + + ncp = devm_kzalloc(dev, sizeof(*ncp), GFP_KERNEL); + if (!ncp) + return -ENOMEM; + + ncp->client = client; + + mc_node = device_get_named_child_node(dev, "multi-led"); + if (!mc_node) + return -EINVAL; + + fwnode_for_each_child_node(mc_node, led_node) + num_subleds++; + + subled_info = devm_kcalloc(dev, num_subleds, + sizeof(*subled_info), GFP_KERNEL); + if (!subled_info) { + ret = -ENOMEM; + goto release_mc_node; + } + + fwnode_for_each_available_child_node(mc_node, led_node) { + ret = fwnode_property_read_u32(led_node, "color", &color_index); + if (ret) { + fwnode_handle_put(led_node); + goto release_mc_node; + } + + ret = fwnode_property_read_u32(led_node, "reg", ®); + if (ret) { + fwnode_handle_put(led_node); + goto release_mc_node; + } + + subled_info[ncp->mc_dev.num_colors].channel = reg; + subled_info[ncp->mc_dev.num_colors++].color_index = color_index; + } + + init_data.fwnode = mc_node; + + ncp->mc_dev.led_cdev.max_brightness = NCP5623_MAX_BRIGHTNESS; + ncp->mc_dev.subled_info = subled_info; + ncp->mc_dev.led_cdev.brightness_set_blocking = ncp5623_brightness_set; + ncp->mc_dev.led_cdev.pattern_set = ncp5623_pattern_set; + ncp->mc_dev.led_cdev.pattern_clear = ncp5623_pattern_clear; + ncp->mc_dev.led_cdev.default_trigger = "pattern"; + + mutex_init(&ncp->lock); + i2c_set_clientdata(client, ncp); + + ret = led_classdev_multicolor_register_ext(dev, &ncp->mc_dev, &init_data); + if (ret) + goto destroy_lock; + + fwnode_handle_put(mc_node); + + return 0; + +destroy_lock: + mutex_destroy(&ncp->lock); + +release_mc_node: + fwnode_handle_put(mc_node); + + return ret; +} + +static void ncp5623_remove(struct i2c_client *client) +{ + struct ncp5623 *ncp = i2c_get_clientdata(client); + + mutex_lock(&ncp->lock); + ncp->delay = 0; + mutex_unlock(&ncp->lock); + + ncp5623_write(client, NCP5623_DIMMING_TIME_REG, 0); + led_classdev_multicolor_unregister(&ncp->mc_dev); + mutex_destroy(&ncp->lock); +} + +static void ncp5623_shutdown(struct i2c_client *client) +{ + struct ncp5623 *ncp = i2c_get_clientdata(client); + + if (!(ncp->mc_dev.led_cdev.flags & LED_RETAIN_AT_SHUTDOWN)) + ncp5623_write(client, NCP5623_SHUTDOWN_REG, 0); + + mutex_destroy(&ncp->lock); +} + +static const struct of_device_id ncp5623_id[] = { + { .compatible = "onnn,ncp5623" }, + { } +}; +MODULE_DEVICE_TABLE(of, ncp5623_id); + +static struct i2c_driver ncp5623_i2c_driver = { + .driver = { + .name = "ncp5623", + .of_match_table = ncp5623_id, + }, + .probe = ncp5623_probe, + .remove = ncp5623_remove, + .shutdown = ncp5623_shutdown, +}; + +module_i2c_driver(ncp5623_i2c_driver); + +MODULE_AUTHOR("Abdel Alkuor "); +MODULE_DESCRIPTION("NCP5623 Multi-LED driver"); +MODULE_LICENSE("GPL");