| Message ID | 20241007-starqltechn_integration_upstream-v6-7-0d38b5090c57@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Add support for Maxim Integrated MAX77705 MFD | expand |
On Mon, 07 Oct 2024, Dzmitry Sankouski wrote: > This adds basic support for LEDs for the max77705 PMIC. > > Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com> > > --- > 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 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Lol! How big is your terminal? :) > 4 files changed, 165 insertions(+) > > diff --git a/MAINTAINERS b/MAINTAINERS > index 4bc9c0da6adb..66a1dd7577c4 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -14079,6 +14079,7 @@ F: drivers/*/max14577*.c > F: drivers/*/max77686*.c > F: drivers/*/max77693*.c > F: drivers/*/max77705*.c > +F: drivers/leds/leds-max77705.c Alphabetical? > 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 If MFD_MAX77705 depends on I2C, you shouldn't need that here. > + help > + LED driver for MAX77705 MFD chip from Maxim Integrated. No such thing as an "MFD chip". > + > 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 <bgolaszewski@baylibre.com> You don't need to do that. > +// > +// LED driver for MAXIM 77705 MFD. Remove MFD from everywhere. > +// Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.org> Only the SPDX in C++ please. > +#include <linux/i2c.h> > +#include <linux/leds.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 > + > +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); These nested ternary are pretty miserable. Please break them out. Also all of these magic numbers probably need defining so the maths becomes easier to follow for humans. > + 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; Pop the ret on the bottom, if no other reason than for my OCD! > + unsigned long blink_default = 0; > + > + if (brightness == LED_OFF) { > + // Flash OFF No C++ comments please. > + 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); Line wrap at 100-chars. > + 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; s/map/regmap/ > + int rv, num_leds; What's rv? If it's "return value", then please just use ret. > + u32 reg; > + > + dev = &pdev->dev; Do this during the declaration > + 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) num_leds < 0 > + return -ENODEV; > + > + device_for_each_child_node(dev, child) { If you use the _scoped version, you can drop the gotos. > + 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; Why 2? > + 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"; You don't want to use the label as the devicename? https://github.com/torvalds/linux/blob/master/drivers/leds/led-core.c#L526 > + > + 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; '\n' here. > +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 <dsankouski@gmail.com>"); > +MODULE_LICENSE("GPL"); > > -- > 2.39.2 >
(...) > > drivers/leds/leds-max77705.c | 157 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > Lol! How big is your terminal? :) > Dunno actually, this was generated by b4 (...) > No C++ comments please. > This conflicts with https://patchwork.kernel.org/comment/25898728/ > > + 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); > > Line wrap at 100-chars. > From coding-style.rst: `The preferred limit on the length of a single line is 80 columns.` I only exceed 80 chars, when there's no good wrapping.
On Tue, 22 Oct 2024, Dzmitry Sankouski wrote: > (...) > > > drivers/leds/leds-max77705.c | 157 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > > > Lol! How big is your terminal? :) > > > > Dunno actually, this was generated by b4 > > (...) > > > > No C++ comments please. > > > > This conflicts with https://patchwork.kernel.org/comment/25898728/ a) That's just for the header. b) That's a different subsystem and Mark's choice. > > > + 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); > > > > Line wrap at 100-chars. > > > > From coding-style.rst: > `The preferred limit on the length of a single line is 80 columns.` > I only exceed 80 chars, when there's no good wrapping. a) This is old guidance b) A lot of your lines already break the 80-char rule.
diff --git a/MAINTAINERS b/MAINTAINERS index 4bc9c0da6adb..66a1dd7577c4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14079,6 +14079,7 @@ 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 <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-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 + +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 <dsankouski@gmail.com>"); +MODULE_LICENSE("GPL");
This adds basic support for LEDs for the max77705 PMIC. Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com> --- 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(+)