From patchwork Tue Mar 5 04:20:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abdel Alkuor X-Patchwork-Id: 778723 Received: from mail-ua1-f45.google.com (mail-ua1-f45.google.com [209.85.222.45]) (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 96EC46FB5; Tue, 5 Mar 2024 04:21:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709612494; cv=none; b=bXmc3XmRUpwafB12kWGq+5Hp9VGFMuUInvlVriRIyUjiK2rPnYOf80lT/TqBr7M1rNI09eOCQJdBs1JGLTKN4gjC5oM2r2prYqm+B6Tfof8yTiu6RALHl6YrdnqreftRB15iVeawiTulF8TvdOifO8DW6Bq3tgZLwJeWSvzi/uo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709612494; c=relaxed/simple; bh=XNcc3M2gGhOadQxYGKri3cOK2NzoGVpParFwUbKckJU=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Nop9iUD3UCNaEg0m84HrxdbRpKTFl0HixNJgGgNw2nDTe1hLDbC23J9t/jgQyQ58WLHjlbAqN7oZsmDRYzqT+0JJ11RQFZ2qoQ2ZaB1YTbpfljn1+WmVH6rP3mjdSn5T9XzU6Hxhdch+upimUFdmFCuvvlq1zDjbSxyQP+Y7/LQ= 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=duQdcEw0; arc=none smtp.client-ip=209.85.222.45 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="duQdcEw0" Received: by mail-ua1-f45.google.com with SMTP id a1e0cc1a2514c-7daf957595bso1381659241.1; Mon, 04 Mar 2024 20:21:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1709612490; x=1710217290; 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=bRPUWl1psjiYGTL8rKAK4A/7PYD7OjCJB+XkBQBD0Ao=; b=duQdcEw0IZ6Q4ACahJ+xFvQKlToUAnICFl0oDScz+ctO6pstKkwJb3Vmwuz2B30p9s RLHgJ77PtCF/A8aIOk2oerV/x+IO9P2rsAgg466aPtvbpqZcQ95wFM1ho8mByjWTz5fx feVrWgAvDI7oDtw4OYrw6gh4dGRLaaJgaQC7Cuz0Sq+b43h+9EXWHDdtRYTpNZ4XdL1G vq0th5Mx1yNqnmdydxsTrnOyPjJ9RhJn1MRvUHhbPEPtpZVGJ4z3WL0ApsA3WTFsuwUi gtKrzQZtQrzNW15phZ8m9XOQhKC1/gHh8C9IOS6Q5QCJ/eXPwHHXoUO6R08sPF+fbNDE k1cA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1709612490; x=1710217290; 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=bRPUWl1psjiYGTL8rKAK4A/7PYD7OjCJB+XkBQBD0Ao=; b=iLy2xQykWJUbomCctelAxoct0gsG7d0pL6B/6m8+ggnWRfvrYrI2h1y4UPAx5/bgwm gMq5DMKPz5uNVV9umZGQXoHjZGqR1sjMwoscsfTbZhlzieBuPRp0loQj6e5DOD6rhNZi OfeJ125ieMfw9z1hICWOwd/E5BubDiN9tP4Llzs+YQqI7wlea1McZfLdMZqwyBaAs1C/ yoaMuoPrhe1LFcaDAd3UJ2VvWgQyApNviHWUaj6SY7UObuwTW/u/tPypTb+NYA/XVXKb NOFoO6AXNgGKNwLCn8+g0sLCdEodCBqsUYHA5MiWiwHlg/j6JXUgT/lPB9+lQTJ5IorS Vj1Q== X-Forwarded-Encrypted: i=1; AJvYcCX89ECZB8kOz5vZQ0xW1s3vceWzy1sGqv2AVVl105/wS3vBuoqks97GuV+sudvcNQ7Y7wChPUT0HzQxPuiK0r89N6OkT3dHidd0yorCaoAaz8yezvIKFg5Vw7gleUXCelZZ8DUgo6yk6rfQwl8mKaDskJmIGXDHD62U0TDUSpwOh3PFSHg= X-Gm-Message-State: AOJu0YwrrfjWXR0HTdPK/qOpNJ787xp5c0YRQBD4rcX7C02B5KW/MPqY 6fN7tS/uuyHNesvwtTPOqHZ7gb3k5qtJjvD0ms7/OCfCazhoV7wsqVVRZXcqr4M= X-Google-Smtp-Source: AGHT+IFT32809+aJZO3E4JHk/VYRjiitNr4MylvuX+RDM7mwKLtk9hToxZj2tWsABLbxlaWVvO9jcQ== X-Received: by 2002:a05:6122:311d:b0:4d3:49db:6dd2 with SMTP id cg29-20020a056122311d00b004d349db6dd2mr873366vkb.9.1709612490375; Mon, 04 Mar 2024 20:21:30 -0800 (PST) Received: from localhost.localdomain ([174.95.13.129]) by smtp.gmail.com with ESMTPSA id mw10-20020a05621433ca00b0068f2b1d9415sm5796018qvb.23.2024.03.04.20.21.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Mar 2024 20:21:29 -0800 (PST) From: Abdel Alkuor To: Pavel Machek , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , ChiaEn Wu , Jean-Jacques Hiblot , Abdel Alkuor , ChiYuan Huang , Lukas Bulwahn , =?utf-8?q?Andr=C3=A9_Apitzsch?= Cc: Krzysztof Kozlowski , Jacek Anaszewski , Alice Chen , linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/2] dt-bindings: leds: Add NCP5623 multi-LED Controller Date: Mon, 4 Mar 2024 23:20:28 -0500 Message-Id: <20240305042049.1533279-1-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 Reviewed-by: Krzysztof Kozlowski --- Changes in v3: - Add Reviewed-by tag - Link to v2: https://lore.kernel.org/all/20240217230956.630522-1-alkuor@gmail.com/ 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>; 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Mon, 04 Mar 2024 20:21:51 -0800 (PST) From: Abdel Alkuor To: Pavel Machek , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alice Chen , Jacek Anaszewski , Abdel Alkuor , ChiYuan Huang , =?utf-8?q?Andr=C3=A9_Apitzsch?= , Lukas Bulwahn , Jean-Jacques Hiblot , ChiaEn Wu Cc: linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/2] leds: Add NCP5623 multi-led driver Date: Mon, 4 Mar 2024 23:20:29 -0500 Message-Id: <20240305042049.1533279-2-alkuor@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240305042049.1533279-1-alkuor@gmail.com> References: <20240305042049.1533279-1-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 v3: - Add defines for magic numbers - Fix code style - Add a comment how ncp->delay is calculated - Don't free mc_node when probe is successful - Link to v2: https://lore.kernel.org/all/20240217230956.630522-2-alkuor@gmail.com/ 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 | 271 ++++++++++++++++++++++++++++++++ 3 files changed, 283 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..b669c55c5483 --- /dev/null +++ b/drivers/leds/rgb/leds-ncp5623.c @@ -0,0 +1,271 @@ +// 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_FUNCTION_OFFSET 0x5 +#define NCP5623_REG(x) ((x) << NCP5623_FUNCTION_OFFSET) + +#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 +#define NCP5623_MAX_DIM_TIME 240 /* ms */ +#define NCP5623_DIM_STEP 8 /* ms */ + +struct ncp5623 { + struct i2c_client *client; + struct led_classdev_mc mc_dev; + struct mutex lock; + + int current_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->current_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 > NCP5623_MAX_DIM_TIME || + (pattern[0].delta_t % NCP5623_DIM_STEP) != 0) + return -EINVAL; + + brightness_diff = pattern[0].brightness - ncp->current_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 / NCP5623_DIM_STEP); + if (ret) + return ret; + + /* + * During testing, when the brightness difference is 1, for some + * unknown reason, the time factor it takes to change to the new + * value is the longest time possible. Otherwise, the time factor + * is simply the brightness difference. + * + * For example: + * current_brightness = 20 and new_brightness = 21 then the time it + * takes to set the new brightness increments to the maximum possible + * brightness from 20 then from 0 to 21. + * time_factor = max_brightness - 20 + 21 + */ + 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->current_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; + + 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");