Dan, On 9/20/19 7:41 PM, Dan Murphy wrote: > Introduce the LP5036/30/24/18/12/9 RGB LED driver. > The difference in these parts are the number of > LED outputs where the: > > LP5036 can control 36 LEDs > LP5030 can control 30 LEDs > LP5024 can control 24 LEDs > LP5018 can control 18 LEDs > LP5012 can control 12 LEDs > LP509 can control 9 LEDs > > The device has the ability to group LED output into control banks > so that multiple LED banks can be controlled with the same mixing and > brightness. Inversely the LEDs can also be controlled independently. > > Signed-off-by: Dan Murphy <[email protected]> > --- > drivers/leds/Kconfig | 7 + > drivers/leds/Makefile | 1 + > drivers/leds/leds-lp50xx.c | 785 +++++++++++++++++++++++++++++++++++++ > 3 files changed, 793 insertions(+) > create mode 100644 drivers/leds/leds-lp50xx.c > > diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig > index cfb1ebb6517f..1c0cacb100e6 100644 > --- a/drivers/leds/Kconfig > +++ b/drivers/leds/Kconfig > @@ -363,6 +363,13 @@ config LEDS_LP3952 > To compile this driver as a module, choose M here: the > module will be called leds-lp3952. > > +config LEDS_LP50XX > + tristate "LED Support for TI LP5036/30/24/18 LED driver chip" > + depends on LEDS_CLASS && REGMAP_I2C
&& OF > + help > + If you say yes here you get support for the Texas Instruments > + LP5036, LP5030, LP5024 and LP5018 LED driver. Please add also this standard sentence for a module. > + > config LEDS_LP55XX_COMMON > tristate "Common Driver for TI/National LP5521/5523/55231/5562/8501" > depends on LEDS_LP5521 || LEDS_LP5523 || LEDS_LP5562 || LEDS_LP8501 > diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile > index 841038cfe35b..7a208a0f7b84 100644 > --- a/drivers/leds/Makefile > +++ b/drivers/leds/Makefile > @@ -34,6 +34,7 @@ obj-$(CONFIG_LEDS_GPIO_REGISTER) += leds-gpio-register.o > obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o > obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o > obj-$(CONFIG_LEDS_LP3952) += leds-lp3952.o > +obj-$(CONFIG_LEDS_LP50XX) += leds-lp50xx.o > obj-$(CONFIG_LEDS_LP55XX_COMMON) += leds-lp55xx-common.o > obj-$(CONFIG_LEDS_LP5521) += leds-lp5521.o > obj-$(CONFIG_LEDS_LP5523) += leds-lp5523.o > diff --git a/drivers/leds/leds-lp50xx.c b/drivers/leds/leds-lp50xx.c > new file mode 100644 > index 000000000000..3ddc14f53eae > --- /dev/null > +++ b/drivers/leds/leds-lp50xx.c > @@ -0,0 +1,785 @@ > +// SPDX-License-Identifier: GPL-2.0 > +// TI LP50XX LED chip family driver > +// Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ > + > +#include <linux/gpio/consumer.h> > +#include <linux/i2c.h> > +#include <linux/init.h> > +#include <linux/leds.h> > +#include <linux/module.h> > +#include <linux/mutex.h> > +#include <linux/of.h> > +#include <linux/of_gpio.h> > +#include <linux/regmap.h> > +#include <linux/regulator/consumer.h> > +#include <linux/slab.h> > +#include <uapi/linux/uleds.h> > + > +#include <linux/led-class-multicolor.h> > + > +#define LP50XX_DEV_CFG0 0x00 > +#define LP50XX_DEV_CFG1 0x01 > +#define LP50XX_LED_CFG0 0x02 > + > +/* LP5009 and LP5012 registers */ > +#define LP5012_BNK_BRT 0x03 > +#define LP5012_BNKA_CLR 0x04 > +#define LP5012_BNKB_CLR 0x05 > +#define LP5012_BNKC_CLR 0x06 > +#define LP5012_LED0_BRT 0x07 > +#define LP5012_LED1_BRT 0x08 > +#define LP5012_LED2_BRT 0x09 > +#define LP5012_LED3_BRT 0x0a > +#define LP5012_OUT0_CLR 0x0b > +#define LP5012_OUT1_CLR 0x0c > +#define LP5012_OUT2_CLR 0x0d > +#define LP5012_OUT3_CLR 0x0e > +#define LP5012_OUT4_CLR 0x0f > +#define LP5012_OUT5_CLR 0x10 > +#define LP5012_OUT6_CLR 0x11 > +#define LP5012_OUT7_CLR 0x12 > +#define LP5012_OUT8_CLR 0x13 > +#define LP5012_OUT9_CLR 0x14 > +#define LP5012_OUT10_CLR 0x15 > +#define LP5012_OUT11_CLR 0x16 > +#define LP5012_RESET 0x17 > + > +/* LP5018 and LP5024 registers */ > +#define LP5024_BNK_BRT 0x03 > +#define LP5024_BNKA_CLR 0x04 > +#define LP5024_BNKB_CLR 0x05 > +#define LP5024_BNKC_CLR 0x06 > +#define LP5024_LED0_BRT 0x07 > +#define LP5024_LED1_BRT 0x08 > +#define LP5024_LED2_BRT 0x09 > +#define LP5024_LED3_BRT 0x0a > +#define LP5024_LED4_BRT 0x0b > +#define LP5024_LED5_BRT 0x0c > +#define LP5024_LED6_BRT 0x0d > +#define LP5024_LED7_BRT 0x0e > + > +#define LP5024_OUT0_CLR 0x0f > +#define LP5024_OUT1_CLR 0x10 > +#define LP5024_OUT2_CLR 0x11 > +#define LP5024_OUT3_CLR 0x12 > +#define LP5024_OUT4_CLR 0x13 > +#define LP5024_OUT5_CLR 0x14 > +#define LP5024_OUT6_CLR 0x15 > +#define LP5024_OUT7_CLR 0x16 > +#define LP5024_OUT8_CLR 0x17 > +#define LP5024_OUT9_CLR 0x18 > +#define LP5024_OUT10_CLR 0x19 > +#define LP5024_OUT11_CLR 0x1a > +#define LP5024_OUT12_CLR 0x1b > +#define LP5024_OUT13_CLR 0x1c > +#define LP5024_OUT14_CLR 0x1d > +#define LP5024_OUT15_CLR 0x1e > +#define LP5024_OUT16_CLR 0x1f > +#define LP5024_OUT17_CLR 0x20 > +#define LP5024_OUT18_CLR 0x21 > +#define LP5024_OUT19_CLR 0x22 > +#define LP5024_OUT20_CLR 0x23 > +#define LP5024_OUT21_CLR 0x24 > +#define LP5024_OUT22_CLR 0x25 > +#define LP5024_OUT23_CLR 0x26 > +#define LP5024_RESET 0x27 > + > +/* LP5030 and LP5036 registers */ > +#define LP5036_LED_CFG1 0x03 > +#define LP5036_BNK_BRT 0x04 > +#define LP5036_BNKA_CLR 0x05 > +#define LP5036_BNKB_CLR 0x06 > +#define LP5036_BNKC_CLR 0x07 > +#define LP5036_LED0_BRT 0x08 > +#define LP5036_LED1_BRT 0x09 > +#define LP5036_LED2_BRT 0x0a > +#define LP5036_LED3_BRT 0x0b > +#define LP5036_LED4_BRT 0x0c > +#define LP5036_LED5_BRT 0x0d > +#define LP5036_LED6_BRT 0x0e > +#define LP5036_LED7_BRT 0x0f > +#define LP5036_LED8_BRT 0x10 > +#define LP5036_LED9_BRT 0x11 > +#define LP5036_LED10_BRT 0x12 > +#define LP5036_LED11_BRT 0x13 > + > +#define LP5036_OUT0_CLR 0x14 > +#define LP5036_OUT1_CLR 0x15 > +#define LP5036_OUT2_CLR 0x16 > +#define LP5036_OUT3_CLR 0x17 > +#define LP5036_OUT4_CLR 0x18 > +#define LP5036_OUT5_CLR 0x19 > +#define LP5036_OUT6_CLR 0x1a > +#define LP5036_OUT7_CLR 0x1b > +#define LP5036_OUT8_CLR 0x1c > +#define LP5036_OUT9_CLR 0x1d > +#define LP5036_OUT10_CLR 0x1e > +#define LP5036_OUT11_CLR 0x1f > +#define LP5036_OUT12_CLR 0x20 > +#define LP5036_OUT13_CLR 0x21 > +#define LP5036_OUT14_CLR 0x22 > +#define LP5036_OUT15_CLR 0x23 > +#define LP5036_OUT16_CLR 0x24 > +#define LP5036_OUT17_CLR 0x25 > +#define LP5036_OUT18_CLR 0x26 > +#define LP5036_OUT19_CLR 0x27 > +#define LP5036_OUT20_CLR 0x28 > +#define LP5036_OUT21_CLR 0x29 > +#define LP5036_OUT22_CLR 0x2a > +#define LP5036_OUT23_CLR 0x2b > +#define LP5036_OUT24_CLR 0x2c > +#define LP5036_OUT25_CLR 0x2d > +#define LP5036_OUT26_CLR 0x2e > +#define LP5036_OUT27_CLR 0x2f > +#define LP5036_OUT28_CLR 0x30 > +#define LP5036_OUT29_CLR 0x31 > +#define LP5036_OUT30_CLR 0x32 > +#define LP5036_OUT31_CLR 0x33 > +#define LP5036_OUT32_CLR 0x34 > +#define LP5036_OUT33_CLR 0x35 > +#define LP5036_OUT34_CLR 0x36 > +#define LP5036_OUT35_CLR 0x37 > +#define LP5036_RESET 0x38 > + > +#define LP50XX_SW_RESET 0xff > +#define LP50XX_CHIP_EN BIT(6) > + > +#define LP5009_MAX_LED_MODULES 2 > +#define LP5012_MAX_LED_MODULES 4 > +#define LP5018_MAX_LED_MODULES 6 > +#define LP5024_MAX_LED_MODULES 8 > +#define LP5030_MAX_LED_MODULES 10 > +#define LP5036_MAX_LED_MODULES 12 > + > +struct lp50xx_led { > + struct led_classdev led_dev; > + struct led_classdev_mc mc_cdev; > + struct lp50xx *priv; > + unsigned long bank_modules; > + int led_intensity[LED_COLOR_ID_MAX]; This is waste of memory. There should be only three elements. > + u8 ctrl_bank_enabled; > + int led_number; > +}; > + > +/** > + * struct lp50xx - > + * @enable_gpio: Hardware enable gpio > + * @regulator: LED supply regulator pointer > + * @client: Pointer to the I2C client > + * @regmap: Devices register map Device or Device's ? > + * @dev: Pointer to the devices device struct > + * @lock: Lock for reading/writing the device > + * @chip_info: chip specific information (ie num_leds) > + * @num_of_banked_leds: holds the number of banked LEDs > + * @leds: Array of LED strings > + */ > +struct lp50xx { > + struct gpio_desc *enable_gpio; > + struct regulator *regulator; > + struct i2c_client *client; > + struct regmap *regmap; > + struct device *dev; > + struct mutex lock; > + const struct lp50xx_chip_info *chip_info; > + int num_of_banked_leds; > + > + /* This needs to be at the end of the struct */ > + struct lp50xx_led leds[]; > +}; > + > +static const struct reg_default lp5012_reg_defs[] = { > + {LP50XX_DEV_CFG0, 0x0}, > + {LP50XX_DEV_CFG1, 0x3c}, > + {LP50XX_LED_CFG0, 0x0}, > + {LP5012_BNK_BRT, 0xff}, > + {LP5012_BNKA_CLR, 0x0f}, > + {LP5012_BNKB_CLR, 0x0f}, > + {LP5012_BNKC_CLR, 0x0f}, > + {LP5012_LED0_BRT, 0x0f}, > + {LP5012_LED1_BRT, 0xff}, > + {LP5012_LED2_BRT, 0xff}, > + {LP5012_LED3_BRT, 0xff}, > + {LP5012_OUT0_CLR, 0x0f}, > + {LP5012_OUT1_CLR, 0x00}, > + {LP5012_OUT2_CLR, 0x00}, > + {LP5012_OUT3_CLR, 0x00}, > + {LP5012_OUT4_CLR, 0x00}, > + {LP5012_OUT5_CLR, 0x00}, > + {LP5012_OUT6_CLR, 0x00}, > + {LP5012_OUT7_CLR, 0x00}, > + {LP5012_OUT8_CLR, 0x00}, > + {LP5012_OUT9_CLR, 0x00}, > + {LP5012_OUT10_CLR, 0x00}, > + {LP5012_OUT11_CLR, 0x00}, > + {LP5012_RESET, 0x00} > +}; > + > +static const struct reg_default lp5024_reg_defs[] = { > + {LP50XX_DEV_CFG0, 0x0}, > + {LP50XX_DEV_CFG1, 0x3c}, > + {LP50XX_LED_CFG0, 0x0}, > + {LP5024_BNK_BRT, 0xff}, > + {LP5024_BNKA_CLR, 0x0f}, > + {LP5024_BNKB_CLR, 0x0f}, > + {LP5024_BNKC_CLR, 0x0f}, > + {LP5024_LED0_BRT, 0x0f}, > + {LP5024_LED1_BRT, 0xff}, > + {LP5024_LED2_BRT, 0xff}, > + {LP5024_LED3_BRT, 0xff}, > + {LP5024_LED4_BRT, 0xff}, > + {LP5024_LED5_BRT, 0xff}, > + {LP5024_LED6_BRT, 0xff}, > + {LP5024_LED7_BRT, 0xff}, > + {LP5024_OUT0_CLR, 0x0f}, > + {LP5024_OUT1_CLR, 0x00}, > + {LP5024_OUT2_CLR, 0x00}, > + {LP5024_OUT3_CLR, 0x00}, > + {LP5024_OUT4_CLR, 0x00}, > + {LP5024_OUT5_CLR, 0x00}, > + {LP5024_OUT6_CLR, 0x00}, > + {LP5024_OUT7_CLR, 0x00}, > + {LP5024_OUT8_CLR, 0x00}, > + {LP5024_OUT9_CLR, 0x00}, > + {LP5024_OUT10_CLR, 0x00}, > + {LP5024_OUT11_CLR, 0x00}, > + {LP5024_OUT12_CLR, 0x00}, > + {LP5024_OUT13_CLR, 0x00}, > + {LP5024_OUT14_CLR, 0x00}, > + {LP5024_OUT15_CLR, 0x00}, > + {LP5024_OUT16_CLR, 0x00}, > + {LP5024_OUT17_CLR, 0x00}, > + {LP5024_OUT18_CLR, 0x00}, > + {LP5024_OUT19_CLR, 0x00}, > + {LP5024_OUT20_CLR, 0x00}, > + {LP5024_OUT21_CLR, 0x00}, > + {LP5024_OUT22_CLR, 0x00}, > + {LP5024_OUT23_CLR, 0x00}, > + {LP5024_RESET, 0x00} > +}; > + > +static const struct reg_default lp5036_reg_defs[] = { > + {LP50XX_DEV_CFG0, 0x0}, > + {LP50XX_DEV_CFG1, 0x3c}, > + {LP50XX_LED_CFG0, 0x0}, > + {LP5036_LED_CFG1, 0x0}, > + {LP5036_BNK_BRT, 0xff}, > + {LP5036_BNKA_CLR, 0x0f}, > + {LP5036_BNKB_CLR, 0x0f}, > + {LP5036_BNKC_CLR, 0x0f}, > + {LP5036_LED0_BRT, 0x0f}, > + {LP5036_LED1_BRT, 0xff}, > + {LP5036_LED2_BRT, 0xff}, > + {LP5036_LED3_BRT, 0xff}, > + {LP5036_LED4_BRT, 0xff}, > + {LP5036_LED5_BRT, 0xff}, > + {LP5036_LED6_BRT, 0xff}, > + {LP5036_LED7_BRT, 0xff}, > + {LP5036_OUT0_CLR, 0x0f}, > + {LP5036_OUT1_CLR, 0x00}, > + {LP5036_OUT2_CLR, 0x00}, > + {LP5036_OUT3_CLR, 0x00}, > + {LP5036_OUT4_CLR, 0x00}, > + {LP5036_OUT5_CLR, 0x00}, > + {LP5036_OUT6_CLR, 0x00}, > + {LP5036_OUT7_CLR, 0x00}, > + {LP5036_OUT8_CLR, 0x00}, > + {LP5036_OUT9_CLR, 0x00}, > + {LP5036_OUT10_CLR, 0x00}, > + {LP5036_OUT11_CLR, 0x00}, > + {LP5036_OUT12_CLR, 0x00}, > + {LP5036_OUT13_CLR, 0x00}, > + {LP5036_OUT14_CLR, 0x00}, > + {LP5036_OUT15_CLR, 0x00}, > + {LP5036_OUT16_CLR, 0x00}, > + {LP5036_OUT17_CLR, 0x00}, > + {LP5036_OUT18_CLR, 0x00}, > + {LP5036_OUT19_CLR, 0x00}, > + {LP5036_OUT20_CLR, 0x00}, > + {LP5036_OUT21_CLR, 0x00}, > + {LP5036_OUT22_CLR, 0x00}, > + {LP5036_OUT23_CLR, 0x00}, > + {LP5036_OUT24_CLR, 0x00}, > + {LP5036_OUT25_CLR, 0x00}, > + {LP5036_OUT26_CLR, 0x00}, > + {LP5036_OUT27_CLR, 0x00}, > + {LP5036_OUT28_CLR, 0x00}, > + {LP5036_OUT29_CLR, 0x00}, > + {LP5036_OUT30_CLR, 0x00}, > + {LP5036_OUT31_CLR, 0x00}, > + {LP5036_OUT32_CLR, 0x00}, > + {LP5036_OUT33_CLR, 0x00}, > + {LP5036_OUT34_CLR, 0x00}, > + {LP5036_OUT35_CLR, 0x00}, > + {LP5036_RESET, 0x00} > +}; > + > +static const struct regmap_config lp5012_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > + > + .max_register = LP5012_RESET, > + .reg_defaults = lp5012_reg_defs, > + .num_reg_defaults = ARRAY_SIZE(lp5012_reg_defs), > + .cache_type = REGCACHE_RBTREE, > +}; > + > +static const struct regmap_config lp5024_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > + > + .max_register = LP5024_RESET, > + .reg_defaults = lp5024_reg_defs, > + .num_reg_defaults = ARRAY_SIZE(lp5024_reg_defs), > + .cache_type = REGCACHE_RBTREE, > +}; > + > +static const struct regmap_config lp5036_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > + > + .max_register = LP5036_RESET, > + .reg_defaults = lp5036_reg_defs, > + .num_reg_defaults = ARRAY_SIZE(lp5036_reg_defs), > + .cache_type = REGCACHE_RBTREE, > +}; > + > +enum lp50xx_model { > + LP5009, > + LP5012, > + LP5018, > + LP5024, > + LP5030, > + LP5036, > +}; > + > +/* > + * struct lp50xx_chip_info - > + * @num_leds: number of LED outputs available on the device > + * @led_brightness0_reg: first brightness register of the device > + * @mix_out0_reg: first color mix register of the device > + * @bank_brt_reg: bank brightness register > + * @bank_mix_reg: color mix register > + * @reset_reg: devices reset register s/devices/device/ Please be consequent: I prefer starting the property description always with lower case. > + */ > +struct lp50xx_chip_info { > + struct regmap_config lp50xx_regmap_config; > + u8 num_leds; > + u8 led_brightness0_reg; > + u8 mix_out0_reg; > + u8 bank_brt_reg; > + u8 bank_mix_reg; > + u8 reset_reg; > +}; > + > +static const struct lp50xx_chip_info lp50xx_chip_info_tbl[] = { > + [LP5009] = { > + .num_leds = LP5009_MAX_LED_MODULES, > + .led_brightness0_reg = LP5012_LED0_BRT, > + .mix_out0_reg = LP5012_OUT0_CLR, > + .bank_brt_reg = LP5012_BNK_BRT, > + .bank_mix_reg = LP5012_BNKA_CLR, > + .reset_reg = LP5012_RESET, > + .lp50xx_regmap_config = lp5012_regmap_config, > + }, > + [LP5012] = { > + .num_leds = LP5012_MAX_LED_MODULES, > + .led_brightness0_reg = LP5012_LED0_BRT, > + .mix_out0_reg = LP5012_OUT0_CLR, > + .bank_brt_reg = LP5012_BNK_BRT, > + .bank_mix_reg = LP5012_BNKA_CLR, > + .reset_reg = LP5012_RESET, > + .lp50xx_regmap_config = lp5012_regmap_config, > + }, > + [LP5018] = { > + .num_leds = LP5018_MAX_LED_MODULES, > + .led_brightness0_reg = LP5024_LED0_BRT, > + .mix_out0_reg = LP5024_OUT0_CLR, > + .bank_brt_reg = LP5024_BNK_BRT, > + .bank_mix_reg = LP5024_BNKA_CLR, > + .reset_reg = LP5024_RESET, > + .lp50xx_regmap_config = lp5024_regmap_config, > + }, > + [LP5024] = { > + .num_leds = LP5024_MAX_LED_MODULES, > + .led_brightness0_reg = LP5024_LED0_BRT, > + .mix_out0_reg = LP5024_OUT0_CLR, > + .bank_brt_reg = LP5024_BNK_BRT, > + .bank_mix_reg = LP5024_BNKA_CLR, > + .reset_reg = LP5024_RESET, > + .lp50xx_regmap_config = lp5024_regmap_config, > + }, > + [LP5030] = { > + .num_leds = LP5030_MAX_LED_MODULES, > + .led_brightness0_reg = LP5036_LED0_BRT, > + .mix_out0_reg = LP5036_OUT0_CLR, > + .bank_brt_reg = LP5036_BNK_BRT, > + .bank_mix_reg = LP5036_BNKA_CLR, > + .reset_reg = LP5036_RESET, > + .lp50xx_regmap_config = lp5036_regmap_config, > + }, > + [LP5036] = { > + .num_leds = LP5036_MAX_LED_MODULES, > + .led_brightness0_reg = LP5036_LED0_BRT, > + .mix_out0_reg = LP5036_OUT0_CLR, > + .bank_brt_reg = LP5036_BNK_BRT, > + .bank_mix_reg = LP5036_BNKA_CLR, > + .reset_reg = LP5036_RESET, > + .lp50xx_regmap_config = lp5036_regmap_config, > + }, > +}; > + > +static struct lp50xx_led *mcled_cdev_to_led(struct led_classdev_mc > *mcled_cdev) > +{ > + return container_of(mcled_cdev, struct lp50xx_led, mc_cdev); > +} > + > +static int lp50xx_set_intensity(struct lp50xx_led *led) > +{ > + struct lp50xx *priv = led->priv; > + u8 led_offset, reg_number, reg_color_off; reg_color_off feels like "turning the color off" Let's have full reg_color_offset form. > + int i, ret = -EINVAL; > + > + for (i = 0; i <= LED_COLOR_ID_MAX; i++) { > + if (!test_bit(i, &led->mc_cdev.available_colors)) > + continue; > + > + if (i == LED_COLOR_ID_RED) > + reg_color_off = 0; > + else if (i == LED_COLOR_ID_GREEN) > + reg_color_off = 1; > + else if (i == LED_COLOR_ID_BLUE) > + reg_color_off = 2; > + else > + continue; > + > + if (led->ctrl_bank_enabled) { > + reg_number = priv->chip_info->bank_mix_reg + > reg_color_off; > + } else { > + led_offset = (led->led_number * 3) + reg_color_off; > + reg_number = priv->chip_info->mix_out0_reg + led_offset; > + } > + > + ret = regmap_write(priv->regmap, reg_number, > + led->led_intensity[i]); > + if (ret) { > + dev_err(&priv->client->dev, "Cannot write LED value\n"); > + goto out; > + } > + } > +out: > + return ret; > +} > + > +static int lp50xx_brightness_set(struct led_classdev *cdev, > + enum led_brightness brightness) > +{ > + struct lp50xx_led *led = container_of(cdev, struct lp50xx_led, led_dev); > + int ret = 0; > + u8 reg_val; > + > + mutex_lock(&led->priv->lock); > + > + if (led->ctrl_bank_enabled) > + reg_val = led->priv->chip_info->bank_brt_reg; > + else > + reg_val = led->priv->chip_info->led_brightness0_reg + > + led->led_number; > + > + ret = regmap_write(led->priv->regmap, reg_val, brightness); > + if (ret) > + goto err_out; > + > + ret = lp50xx_set_intensity(led); > +err_out: > + mutex_unlock(&led->priv->lock); > + return ret; > +} > + > +static enum led_brightness lp50xx_brightness_get(struct led_classdev *cdev) Do we really need this op? Is it possible that the device will alter brightness autonomously ? IOW can't we rely on what we've written previously to the hw? > +{ > + struct lp50xx_led *led = container_of(cdev, struct lp50xx_led, led_dev); > + unsigned int brt_val; > + u8 reg_val; > + int ret; > + > + mutex_lock(&led->priv->lock); > + > + if (led->ctrl_bank_enabled) > + reg_val = led->priv->chip_info->bank_brt_reg; > + else > + reg_val = led->priv->chip_info->led_brightness0_reg + > led->led_number; > + > + ret = regmap_read(led->priv->regmap, reg_val, &brt_val); > + > + mutex_unlock(&led->priv->lock); > + > + return brt_val; > +} > + > +static int lp50xx_set_color(struct led_classdev_mc *mcled_cdev, > + int color, int value) > +{ > + struct lp50xx_led *led = mcled_cdev_to_led(mcled_cdev); > + > + led->led_intensity[color] = value; > + > + return 0; > +} > + > +static int lp50xx_set_banks(struct lp50xx *priv, u32 led_strings[]) This is a bit misleading to introduce "strings" when the function claims to set "banks". Let's have the parameter name "led_banks". > +{ > + u8 led_ctrl_enable = 0; > + u8 led1_ctrl_enable = 0; > + u8 ctrl_ext = 0; Let's have below instead of the above three variables: u32 bank_enable_mask = 0; u8 led_config_lo, led_config_hi; > + int ret; > + int j; This is subjective, but why j? We usually have 'i' for one level loop. > + > + for (j = 0; j <= priv->chip_info->num_leds - 1; j++) { > + if (led_strings[j] > (LP5024_MAX_LED_MODULES - 1)) { > + ctrl_ext = led_strings[j] - LP5024_MAX_LED_MODULES; > + led1_ctrl_enable |= (1 << ctrl_ext)> + } else { > + led_ctrl_enable |= (1 << led_strings[j]); > + } > + } This looks harder than it should be. for (i = 0; i < priv->chip_info->num_leds; i++) bank_enable_mask |= (1 << led_banks[i]); led_config_lo = (u8)(bank_enable_mask & 0xff); led_config_hi = (u8)(bank_enable_mask >> 8) & 0xff); > + > + ret = regmap_write(priv->regmap, LP50XX_LED_CFG0, led_ctrl_enable); ret = regmap_write(priv->regmap, LP50XX_LED_CFG0, led_config_lo); if (ret) return ret; > + > + if (led1_ctrl_enable) > + ret = regmap_write(priv->regmap, LP5036_LED_CFG1, > + led1_ctrl_enable); if (led_config_hi) ret = regmap_write(priv->regmap, LP5036_LED_CFG1, led_config_hi); > + > + return ret; > +} > + > +static int lp50xx_reset(struct lp50xx *priv) > +{ > + if (priv->enable_gpio) > + return gpiod_direction_output(priv->enable_gpio, 1); > + else > + return regmap_write(priv->regmap, priv->chip_info->reset_reg, > + LP50XX_SW_RESET); > +} > + > +static int lp50xx_enable_disable(struct lp50xx *priv, u8 enable_disable) > +{ > + return regmap_write(priv->regmap, LP50XX_DEV_CFG0, enable_disable); > +} > + > +static int lp50xx_probe_dt(struct lp50xx *priv) > +{ > + u32 led_strings[LP5036_MAX_LED_MODULES]; s/led_strings/led_banks/ > + struct fwnode_handle *child = NULL; > + struct fwnode_handle *led_node = NULL; > + struct led_init_data init_data; > + struct lp50xx_led *led; > + int num_colors; > + u32 color_id; > + int led_number; > + size_t i = 0; > + int ret; > + > + priv->enable_gpio = devm_gpiod_get_optional(&priv->client->dev, > + "enable", GPIOD_OUT_LOW); > + if (IS_ERR(priv->enable_gpio)) { > + ret = PTR_ERR(priv->enable_gpio); > + dev_err(&priv->client->dev, "Failed to get enable gpio: %d\n", > + ret); > + return ret; > + } > + > + priv->regulator = devm_regulator_get(&priv->client->dev, "vled"); > + if (IS_ERR(priv->regulator)) > + priv->regulator = NULL; > + > + device_for_each_child_node(&priv->client->dev, child) { > + led = &priv->leds[i]; > + if (fwnode_property_present(child, "ti,led-bank")) { > + ret = fwnode_property_read_u32_array(child, > + "ti,led-bank", > + NULL, 0); > + ret = fwnode_property_read_u32_array(child, > + "ti,led-bank", > + led_strings, > + ret); > + > + priv->num_of_banked_leds = ARRAY_SIZE(led_strings); > + > + ret = lp50xx_set_banks(priv, led_strings); > + if (ret) { > + dev_err(&priv->client->dev, > + "Cannot setup banked LEDs\n"); > + fwnode_handle_put(child); > + goto child_out; > + } > + led->ctrl_bank_enabled = 1; > + > + } else { > + ret = fwnode_property_read_u32(child, "reg", > + &led_number); > + > + led->led_number = led_number; > + } > + if (ret) { > + dev_err(&priv->client->dev, > + "led sourcing property missing\n"); > + fwnode_handle_put(child); > + goto child_out; > + } > + > + if (led_number > priv->chip_info->num_leds) { > + dev_err(&priv->client->dev, > + "led-sources property is invalid\n"); > + ret = -EINVAL; > + fwnode_handle_put(child); > + goto child_out; > + } > + > + init_data.fwnode = child; > + init_data.devicename = priv->client->name; > + init_data.default_label = ":"; devicename and default_label are for LEDs with mandatory devicename and for backward compatibility. Neither is pertinent to this driver. > + > + fwnode_property_read_string(child, "linux,default-trigger", > + &led->led_dev.default_trigger); > + num_colors = 0; > + > + fwnode_for_each_child_node(child, led_node) { > + ret = fwnode_property_read_u32(led_node, "color", > + &color_id); > + if (ret) > + dev_err(&priv->client->dev, > + "Cannot read color\n"); > + > + set_bit(color_id, &led->mc_cdev.available_colors); > + num_colors++; > + > + } > + > + led->priv = priv; > + led->mc_cdev.set_color_brightness = lp50xx_set_color; > + led->mc_cdev.num_leds = num_colors; > + led->mc_cdev.led_cdev = &led->led_dev; > + led->led_dev.brightness_set_blocking = lp50xx_brightness_set; > + led->led_dev.brightness_get = lp50xx_brightness_get; > + ret = led_classdev_multicolor_register_ext(&priv->client->dev, > + &led->mc_cdev, > + &init_data); > + if (ret) { > + dev_err(&priv->client->dev, "led register err: %d\n", > + ret); > + fwnode_handle_put(child); > + goto child_out; > + } > + i++; > + } > + > +child_out: > + return ret; > +} > + > +static int lp50xx_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct lp50xx *led; > + int count; > + int ret; > + > + count = device_get_child_node_count(&client->dev); > + if (!count) { > + dev_err(&client->dev, "LEDs are not defined in device tree!"); > + return -ENODEV; > + } > + > + led = devm_kzalloc(&client->dev, struct_size(led, leds, count), > + GFP_KERNEL); > + if (!led) > + return -ENOMEM; > + > + mutex_init(&led->lock); > + led->client = client; > + led->dev = &client->dev; > + led->chip_info = &lp50xx_chip_info_tbl[id->driver_data]; > + i2c_set_clientdata(client, led); > + > + led->regmap = devm_regmap_init_i2c(client, > + &led->chip_info->lp50xx_regmap_config); > + if (IS_ERR(led->regmap)) { > + ret = PTR_ERR(led->regmap); > + dev_err(&client->dev, "Failed to allocate register map: %d\n", > + ret); > + return ret; > + } > + > + ret = lp50xx_reset(led); > + if (ret) > + return ret; > + > + ret = lp50xx_probe_dt(led); > + if (ret) > + return ret; > + > + return lp50xx_enable_disable(led, LP50XX_CHIP_EN); > +} > + > +static int lp50xx_remove(struct i2c_client *client) > +{ > + struct lp50xx *led = i2c_get_clientdata(client); > + int ret; > + > + ret = lp50xx_enable_disable(led, LP50XX_CHIP_EN); > + if (ret) { > + dev_err(&led->client->dev, "Failed to disable regulator\n"); > + return ret; > + } > + > + if (led->enable_gpio) > + gpiod_direction_output(led->enable_gpio, 0); > + > + if (led->regulator) { > + ret = regulator_disable(led->regulator); > + if (ret) > + dev_err(&led->client->dev, > + "Failed to disable regulator\n"); > + } > + > + mutex_destroy(&led->lock); > + > + return 0; > +} > + > +static const struct i2c_device_id lp50xx_id[] = { > + { "lp5009", LP5009 }, > + { "lp5012", LP5012 }, > + { "lp5018", LP5018 }, > + { "lp5024", LP5024 }, > + { "lp5030", LP5030 }, > + { "lp5036", LP5036 }, > + { } > +}; > +MODULE_DEVICE_TABLE(i2c, lp50xx_id); > + > +static const struct of_device_id of_lp50xx_leds_match[] = { > + { .compatible = "ti,lp5009", .data = (void *)LP5009 }, > + { .compatible = "ti,lp5012", .data = (void *)LP5012 }, > + { .compatible = "ti,lp5018", .data = (void *)LP5018 }, > + { .compatible = "ti,lp5024", .data = (void *)LP5024 }, > + { .compatible = "ti,lp5030", .data = (void *)LP5030 }, > + { .compatible = "ti,lp5036", .data = (void *)LP5036 }, > + {}, > +}; > +MODULE_DEVICE_TABLE(of, of_lp50xx_leds_match); > + > +static struct i2c_driver lp50xx_driver = { > + .driver = { > + .name = "lp50xx", > + .of_match_table = of_lp50xx_leds_match, > + }, > + .probe = lp50xx_probe, > + .remove = lp50xx_remove, > + .id_table = lp50xx_id, > +}; > +module_i2c_driver(lp50xx_driver); > + > +MODULE_DESCRIPTION("Texas Instruments LP50XX LED driver"); > +MODULE_AUTHOR("Dan Murphy <[email protected]>"); > +MODULE_LICENSE("GPL v2"); > -- Best regards, Jacek Anaszewski
