| Message ID | 20240618-starqltechn_integration_upstream-v3-16-e3f6662017ac@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | This is continued work on Samsung S9(SM-9600) starqltechn | expand |
On 18/06/2024 15:59, Dzmitry Sankouski wrote: > This adds basic support for LEDs for the max77705 PMIC. > > Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com> > --- > MAINTAINERS | 1 + > drivers/leds/Kconfig | 6 ++ > drivers/leds/Makefile | 1 + > drivers/leds/leds-max77705.c | 166 +++++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 174 insertions(+) > > diff --git a/MAINTAINERS b/MAINTAINERS > index f66f08825db9..f3c245d432d9 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -13691,6 +13691,7 @@ 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 05e6af88b88c..14d483011308 100644 > --- a/drivers/leds/Kconfig > +++ b/drivers/leds/Kconfig > @@ -728,6 +728,12 @@ config LEDS_MAX77650 > help > LEDs driver for MAX77650 family of PMICs from Maxim Integrated. > > +config LEDS_MAX77705 > + tristate "LED support for Maxim MAX77705 RGB" > + 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 effdfc6f1e95..be064e3d678e 100644 > --- a/drivers/leds/Makefile > +++ b/drivers/leds/Makefile > @@ -58,6 +58,7 @@ 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..f91c0e41056c > --- /dev/null > +++ b/drivers/leds/leds-max77705.c > @@ -0,0 +1,166 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Based on leds-max77650 driver: > + * Copyright (C) 2018 BayLibre SAS > + * Author: Bartosz Golaszewski <bgolaszewski@baylibre.com> > + * > + * LED driver for MAXIM 77705 MFD. > + * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.org> > + */ > + > +#include <linux/i2c.h> > +#include <linux/leds.h> > +#include <linux/mfd/max77705.h> > +#include <linux/mfd/max77705-private.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > + > +#define MAX77705_LED_NUM_LEDS 4 > +#define MAX77705_LED_EN_MASK GENMASK(1, 0) > +#define MAX77705_LED_MAX_BRIGHTNESS 0xff > + > +#define LEDBLNK_ON(time) ((time < 100) ? 0 : \ > + (time < 500) ? time/100-1 : \ > + (time < 3250) ? (time-500)/250+4 : 15) > + > +#define LEDBLNK_OFF(time) ((time < 1) ? 0x00 : \ > + (time < 500) ? 0x01 : \ > + (time < 5000) ? time/500 : \ > + (time < 8000) ? (time-5000)/1000+10 : \ > + (time < 12000) ? (time-8000)/2000+13 : 15) Make both static functions, if really needed, but these appear only in one place, so maybe just code it directly. > + > +struct max77705_led { > + struct led_classdev cdev; > + struct regmap *regmap; > + unsigned int en_shift; > + unsigned int reg_brightness; > + unsigned int regB; noCamelCase. > +}; > + > +static struct max77705_led *max77705_to_led(struct led_classdev *cdev) > +{ > + return container_of(cdev, struct max77705_led, cdev); > +} > + > + 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"; > + /* for backwards compatibility if `label` is not present */ > + init_data.default_label = ":"; There is no backwards compatibility - it's fresh driver. > + > + 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 77705 LED driver"); > +MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>"); > +MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@gmail.com>"); > +MODULE_LICENSE("GPL"); > +MODULE_ALIAS("platform:max77705-led"); You should not need MODULE_ALIAS() in normal cases. If you need it, usually it means your device ID table is wrong (e.g. misses either entries or MODULE_DEVICE_TABLE()). MODULE_ALIAS() is not a substitute for incomplete ID table. Best regards, Krzysztof
diff --git a/MAINTAINERS b/MAINTAINERS index f66f08825db9..f3c245d432d9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13691,6 +13691,7 @@ 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 05e6af88b88c..14d483011308 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -728,6 +728,12 @@ config LEDS_MAX77650 help LEDs driver for MAX77650 family of PMICs from Maxim Integrated. +config LEDS_MAX77705 + tristate "LED support for Maxim MAX77705 RGB" + 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 effdfc6f1e95..be064e3d678e 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -58,6 +58,7 @@ 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..f91c0e41056c --- /dev/null +++ b/drivers/leds/leds-max77705.c @@ -0,0 +1,166 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Based on leds-max77650 driver: + * Copyright (C) 2018 BayLibre SAS + * Author: Bartosz Golaszewski <bgolaszewski@baylibre.com> + * + * LED driver for MAXIM 77705 MFD. + * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.org> + */ + +#include <linux/i2c.h> +#include <linux/leds.h> +#include <linux/mfd/max77705.h> +#include <linux/mfd/max77705-private.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#define MAX77705_LED_NUM_LEDS 4 +#define MAX77705_LED_EN_MASK GENMASK(1, 0) +#define MAX77705_LED_MAX_BRIGHTNESS 0xff + +#define LEDBLNK_ON(time) ((time < 100) ? 0 : \ + (time < 500) ? time/100-1 : \ + (time < 3250) ? (time-500)/250+4 : 15) + +#define LEDBLNK_OFF(time) ((time < 1) ? 0x00 : \ + (time < 500) ? 0x01 : \ + (time < 5000) ? time/500 : \ + (time < 8000) ? (time-5000)/1000+10 : \ + (time < 12000) ? (time-8000)/2000+13 : 15) + +struct max77705_led { + struct led_classdev cdev; + struct regmap *regmap; + unsigned int en_shift; + unsigned int reg_brightness; + unsigned int regB; +}; + +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; + + value = (LEDBLNK_ON(*delay_on) << 4) | LEDBLNK_OFF(*delay_off); + 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"; + /* for backwards compatibility if `label` is not present */ + init_data.default_label = ":"; + + 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 77705 LED driver"); +MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>"); +MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@gmail.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:max77705-led");
This adds basic support for LEDs for the max77705 PMIC. Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com> --- MAINTAINERS | 1 + drivers/leds/Kconfig | 6 ++ drivers/leds/Makefile | 1 + drivers/leds/leds-max77705.c | 166 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 174 insertions(+)