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Wed, 23 Oct 2024 12:43:12 -0700 (PDT) From: Dzmitry Sankouski Date: Wed, 23 Oct 2024 22:42:55 +0300 Subject: [PATCH v7 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: <20241023-starqltechn_integration_upstream-v7-7-9bfaa3f4a1a0@gmail.com> References: <20241023-starqltechn_integration_upstream-v7-0-9bfaa3f4a1a0@gmail.com> In-Reply-To: <20241023-starqltechn_integration_upstream-v7-0-9bfaa3f4a1a0@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 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1729712576; l=9269; i=dsankouski@gmail.com; s=20240619; h=from:subject:message-id; bh=9WJ8S/uipIPxiGfe4mLyTfT2gjVM59K76l71woFhhQQ=; b=Shp9+oGRxlUY10hJIajAquV7LpNsxWJov6kwPtlCjf+dtnZegEeNYfoHAS0sX2YGNenN4FO/L psq/cDjVtpUDk0DGLJBxQ7pxSpoErOIE/HaCWjF/50bxYYwGmJ5bAI5 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 v6: - change compatible suffix to 'rgb' - remove I2C dependency in Kconfig - remove copyright and author from 'based on' header statement - replace MFD abbreviation with PMIC - MAINTAINERS: alphabetic order - max77705_rgb_blink: replace ternary operators with if..else if sequence - max77705_rgb_blink: move hardcoded numbers to constants - max77705_led_brightness_set: move ret to the bottom - s/map/regmap - replace device_for_each_child_node with scoped version - s/rv/ret 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 | 168 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/max77705-private.h | 18 ++++++++++++++++ 5 files changed, 194 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 92700fc71db1..b3076fa66d30 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14119,6 +14119,7 @@ F: Documentation/devicetree/bindings/*/maxim,max77693.yaml F: Documentation/devicetree/bindings/*/maxim,max77705*.yaml F: Documentation/devicetree/bindings/*/maxim,max77843.yaml F: Documentation/devicetree/bindings/clock/maxim,max77686.txt +F: drivers/leds/leds-max77705.c F: drivers/*/*max77843.c F: drivers/*/max14577*.c F: drivers/*/max77686*.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index b784bb74a837..27ce55b32543 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 + help + LED driver for MAX77705 PMIC 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..f0762216c4a7 --- /dev/null +++ b/drivers/leds/leds-max77705.c @@ -0,0 +1,168 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Based on leds-max77650 driver +// +// LED driver for MAXIM 77705 PMIC. +// 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; + + if (*delay_on < MAX77705_RGB_DELAY_100_STEP) + on_value = 0; + else if (*delay_on < MAX77705_RGB_DELAY_100_STEP_LIM) + on_value = *delay_on / MAX77705_RGB_DELAY_100_STEP - 1; + else if (*delay_on < MAX77705_RGB_DELAY_250_STEP_LIM) + on_value = (*delay_on - MAX77705_RGB_DELAY_100_STEP_LIM) / + MAX77705_RGB_DELAY_250_STEP + + MAX77705_RGB_DELAY_100_STEP_COUNT; + else + on_value = 15; + + on_value <<= 4; + + if (*delay_off < 1) + off_value = 0; + else if (*delay_off < MAX77705_RGB_DELAY_500_STEP) + off_value = 1; + else if (*delay_off < MAX77705_RGB_DELAY_500_STEP_LIM) + off_value = *delay_off / MAX77705_RGB_DELAY_500_STEP; + else if (*delay_off < MAX77705_RGB_DELAY_1000_STEP_LIM) + off_value = (*delay_off - MAX77705_RGB_DELAY_1000_STEP_LIM) / + MAX77705_RGB_DELAY_1000_STEP + + MAX77705_RGB_DELAY_500_STEP_COUNT; + else if (*delay_off < MAX77705_RGB_DELAY_2000_STEP_LIM) + off_value = (*delay_off - MAX77705_RGB_DELAY_2000_STEP_LIM) / + MAX77705_RGB_DELAY_2000_STEP + + MAX77705_RGB_DELAY_1000_STEP_COUNT; + else + off_value = 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); + unsigned long blink_default = 0; + int ret; + + 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 max77705_led *leds, *led; + struct device *dev = &pdev->dev; + struct regmap *regmap; + int ret, num_leds; + u32 reg; + + leds = devm_kcalloc(dev, sizeof(*leds), + MAX77705_LED_NUM_LEDS, GFP_KERNEL); + if (!leds) + return -ENOMEM; + + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) + return -ENODEV; + + num_leds = device_get_child_node_count(dev); + if (num_leds < 0 || num_leds > MAX77705_LED_NUM_LEDS) + return -ENODEV; + + device_for_each_child_node_scoped(dev, child) { + struct led_init_data init_data = {}; + + ret = fwnode_property_read_u32(child, "reg", ®); + if (ret || reg >= MAX77705_LED_NUM_LEDS) + ret = -EINVAL; + + led = &leds[reg]; + led->regmap = regmap; + led->reg_brightness = MAX77705_RGBLED_REG_LED0BRT + reg; + led->en_shift = MAX77705_RGBLED_EN_WIDTH * 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; + + ret = devm_led_classdev_register_ext(dev, &led->cdev, + &init_data); + if (ret) + return ret; + + ret = max77705_led_brightness_set(&led->cdev, LED_OFF); + if (ret) + return ret; + } + + return 0; +} + +static const struct of_device_id max77705_led_of_match[] = { + { .compatible = "maxim,max77705-rgb" }, + { } +}; +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"); diff --git a/include/linux/mfd/max77705-private.h b/include/linux/mfd/max77705-private.h index 6eb2b2e07c12..3a9a0a3bd97e 100644 --- a/include/linux/mfd/max77705-private.h +++ b/include/linux/mfd/max77705-private.h @@ -34,6 +34,24 @@ #define MAX77705_SYSTEM_IRQ_SYSOVLO_INT BIT(5) #define MAX77705_SYSTEM_IRQ_TSHDN_INT BIT(6) #define MAX77705_SYSTEM_IRQ_TM_INT BIT(7) +// MAX77705_RGBLED_REG_LEDEN register +#define MAX77705_RGBLED_EN_WIDTH 2 +// MAX77705_RGBLED_REG_LEDBLNK register +#define MAX77705_RGB_DELAY_100_STEP_LIM 500 +#define MAX77705_RGB_DELAY_100_STEP_COUNT 4 +#define MAX77705_RGB_DELAY_100_STEP 100 +#define MAX77705_RGB_DELAY_250_STEP_LIM 3250 +#define MAX77705_RGB_DELAY_250_STEP 250 +#define MAX77705_RGB_DELAY_500_STEP 500 +#define MAX77705_RGB_DELAY_500_STEP_COUNT 10 +#define MAX77705_RGB_DELAY_500_STEP_LIM 5000 +#define MAX77705_RGB_DELAY_1000_STEP_LIM 8000 +#define MAX77705_RGB_DELAY_1000_STEP_COUNT 13 +#define MAX77705_RGB_DELAY_1000_STEP 1000 +#define MAX77705_RGB_DELAY_2000_STEP 2000 +#define MAX77705_RGB_DELAY_2000_STEP_COUNT 13 +#define MAX77705_RGB_DELAY_2000_STEP_LIM 12000 + enum max77705_hw_rev { MAX77705_PASS1 = 1,