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[93.84.1.20]) by smtp.googlemail.com with ESMTPSA id 2adb3069b0e04-537a85ee54esm759071e87.96.2024.09.26.03.21.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Sep 2024 03:21:06 -0700 (PDT) From: Dzmitry Sankouski Date: Thu, 26 Sep 2024 13:20:24 +0300 Subject: [PATCH v5 7/7] leds: max77705: Add LEDs support Precedence: bulk X-Mailing-List: linux-leds@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240617-starqltechn_integration_upstream-v5-7-e0033f141d17@gmail.com> References: <20240617-starqltechn_integration_upstream-v5-0-e0033f141d17@gmail.com> In-Reply-To: <20240617-starqltechn_integration_upstream-v5-0-e0033f141d17@gmail.com> To: Sebastian Reichel , Chanwoo Choi , Krzysztof Kozlowski , Lee Jones , Rob Herring , Conor Dooley , Dmitry Torokhov , Pavel Machek Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-input@vger.kernel.org, linux-leds@vger.kernel.org, Dzmitry Sankouski X-Mailer: b4 0.12.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1727346045; l=6867; i=dsankouski@gmail.com; s=20240619; h=from:subject:message-id; bh=ggv866krfI3IOdjHfV2G9/rH2G2ucI4aiHOZpBnyZCs=; b=e9Kp/kKXhBaZIpJZZafLyD334j2QBxRMpGXnVg5em2noLh44KorysHU2oG+7BPIxs19t+cIV/ 0ejLd2uDK3BCZ69xMcNeGAjuQuHvWcqd1VB3n8O06ajSMZ6najNEFHU X-Developer-Key: i=dsankouski@gmail.com; a=ed25519; pk=YJcXFcN1EWrzBYuiE2yi5Mn6WLn6L1H71J+f7X8fMag= This adds basic support for LEDs for the max77705 PMIC. Signed-off-by: Dzmitry Sankouski --- Changes for v5: - use same hardware name in Kconfig and module descriptions - remove copyrighter owner from module authors Changes in v4: - inline BLINK_(ON|OFF) macro - remove camel case - drop backwards compatibility(new driver) - drop module alias --- MAINTAINERS | 1 + drivers/leds/Kconfig | 6 ++++ drivers/leds/Makefile | 1 + drivers/leds/leds-max77705.c | 157 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 165 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index e45bbafbb938..8f26416617a4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14077,6 +14077,7 @@ F: drivers/*/max14577*.c F: drivers/*/max77686*.c F: drivers/*/max77693*.c F: drivers/*/max77705*.c +F: drivers/leds/leds-max77705.c F: drivers/clk/clk-max77686.c F: drivers/extcon/extcon-max14577.c F: drivers/extcon/extcon-max77693.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index b784bb74a837..a8492623caa4 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -753,6 +753,12 @@ config LEDS_MAX77650 help LEDs driver for MAX77650 family of PMICs from Maxim Integrated. +config LEDS_MAX77705 + tristate "LED support for Maxim MAX77705 PMIC" + depends on MFD_MAX77705 && LEDS_CLASS && I2C + help + LED driver for MAX77705 MFD chip from Maxim Integrated. + config LEDS_MAX8997 tristate "LED support for MAX8997 PMIC" depends on LEDS_CLASS && MFD_MAX8997 diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 18afbb5a23ee..096bf244527d 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -60,6 +60,7 @@ obj-$(CONFIG_LEDS_LP8860) += leds-lp8860.o obj-$(CONFIG_LEDS_LT3593) += leds-lt3593.o obj-$(CONFIG_LEDS_MAX5970) += leds-max5970.o obj-$(CONFIG_LEDS_MAX77650) += leds-max77650.o +obj-$(CONFIG_LEDS_MAX77705) += leds-max77705.o obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o obj-$(CONFIG_LEDS_MC13783) += leds-mc13783.o obj-$(CONFIG_LEDS_MENF21BMC) += leds-menf21bmc.o diff --git a/drivers/leds/leds-max77705.c b/drivers/leds/leds-max77705.c new file mode 100644 index 000000000000..50af81fb7324 --- /dev/null +++ b/drivers/leds/leds-max77705.c @@ -0,0 +1,157 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Based on leds-max77650 driver: +// Copyright (C) 2018 BayLibre SAS +// Author: Bartosz Golaszewski +// +// LED driver for MAXIM 77705 MFD. +// Copyright (C) 2024 Dzmitry Sankouski + +#include +#include +#include +#include +#include +#include + +#define MAX77705_LED_NUM_LEDS 4 +#define MAX77705_LED_EN_MASK GENMASK(1, 0) +#define MAX77705_LED_MAX_BRIGHTNESS 0xff + +struct max77705_led { + struct led_classdev cdev; + struct regmap *regmap; + unsigned int en_shift; + unsigned int reg_brightness; +}; + +static struct max77705_led *max77705_to_led(struct led_classdev *cdev) +{ + return container_of(cdev, struct max77705_led, cdev); +} + +static int max77705_rgb_blink(struct led_classdev *cdev, + unsigned long *delay_on, + unsigned long *delay_off) +{ + struct max77705_led *led = max77705_to_led(cdev); + int value, on_value, off_value; + + on_value = (((*delay_on < 100) ? 0 : + (*delay_on < 500) ? *delay_on/100 - 1 : + (*delay_on < 3250) ? (*delay_on - 500) / 250 + 4 : 15) << 4); + off_value = ((*delay_off < 1) ? 0x00 : + (*delay_off < 500) ? 0x01 : + (*delay_off < 5000) ? *delay_off / 500 : + (*delay_off < 8000) ? (*delay_off - 5000) / 1000 + 10 : + (*delay_off < 12000) ? (*delay_off - 8000) / 2000 + 13 : 15); + value = on_value | off_value; + return regmap_write(led->regmap, MAX77705_RGBLED_REG_LEDBLNK, value); +} + +static int max77705_led_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct max77705_led *led = max77705_to_led(cdev); + int ret; + unsigned long blink_default = 0; + + if (brightness == LED_OFF) { + // Flash OFF + ret = regmap_update_bits(led->regmap, + MAX77705_RGBLED_REG_LEDEN, + MAX77705_LED_EN_MASK << led->en_shift, 0); + max77705_rgb_blink(cdev, &blink_default, &blink_default); + } else { + // Set current + ret = regmap_write(led->regmap, + led->reg_brightness, brightness); + if (ret < 0) + return ret; + + ret = regmap_update_bits(led->regmap, + MAX77705_RGBLED_REG_LEDEN, LED_ON << led->en_shift, + MAX77705_LED_EN_MASK << led->en_shift); + } + + return ret; +} + +static int max77705_led_probe(struct platform_device *pdev) +{ + struct fwnode_handle *child; + struct max77705_led *leds, *led; + struct device *dev; + struct regmap *map; + int rv, num_leds; + u32 reg; + + dev = &pdev->dev; + + leds = devm_kcalloc(dev, sizeof(*leds), + MAX77705_LED_NUM_LEDS, GFP_KERNEL); + if (!leds) + return -ENOMEM; + + map = dev_get_regmap(dev->parent, NULL); + if (!map) + return -ENODEV; + + num_leds = device_get_child_node_count(dev); + if (!num_leds || num_leds > MAX77705_LED_NUM_LEDS) + return -ENODEV; + + device_for_each_child_node(dev, child) { + struct led_init_data init_data = {}; + + rv = fwnode_property_read_u32(child, "reg", ®); + if (rv || reg >= MAX77705_LED_NUM_LEDS) { + rv = -EINVAL; + goto err_node_put; + } + + led = &leds[reg]; + led->regmap = map; + led->reg_brightness = MAX77705_RGBLED_REG_LED0BRT + reg; + led->en_shift = 2 * reg; + led->cdev.brightness_set_blocking = max77705_led_brightness_set; + led->cdev.blink_set = max77705_rgb_blink; + led->cdev.max_brightness = MAX77705_LED_MAX_BRIGHTNESS; + + init_data.fwnode = child; + init_data.devicename = "max77705"; + + rv = devm_led_classdev_register_ext(dev, &led->cdev, + &init_data); + if (rv) + goto err_node_put; + + rv = max77705_led_brightness_set(&led->cdev, LED_OFF); + if (rv) + goto err_node_put; + } + + return 0; +err_node_put: + fwnode_handle_put(child); + return rv; +} + +static const struct of_device_id max77705_led_of_match[] = { + { .compatible = "maxim,max77705-led" }, + { } +}; +MODULE_DEVICE_TABLE(of, max77705_led_of_match); + +static struct platform_driver max77705_led_driver = { + .driver = { + .name = "max77705-led", + .of_match_table = max77705_led_of_match, + }, + .probe = max77705_led_probe, +}; +module_platform_driver(max77705_led_driver); + +MODULE_DESCRIPTION("Maxim MAX77705 LED driver"); +MODULE_AUTHOR("Dzmitry Sankouski "); +MODULE_LICENSE("GPL");