Subject: Re: [PATCH v29 05/16] leds: lp50xx: Add the LP50XX family of the RGB LED driver

From: Marek Behun <[email-masked]>
Date: Sun, 12 Jul 2020 19:21:03 +0200

Hi Dan, one bug in this driver, see below.

On Mon, 22 Jun 2020 13:59:08 -0500
Dan Murphy <[email-masked]> 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
> LP5009 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.
> 
> Acked-by: Jacek Anaszewski <[email-masked]>
> Signed-off-by: Dan Murphy <[email-masked]>
> ---
>  drivers/leds/Kconfig       |  11 +
>  drivers/leds/Makefile      |   1 +
>  drivers/leds/leds-lp50xx.c | 783 +++++++++++++++++++++++++++++++++++++
>  3 files changed, 795 insertions(+)
>  create mode 100644 drivers/leds/leds-lp50xx.c
> 
> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
> index 0d034453eeb9..68f63d1a7d48 100644
> --- a/drivers/leds/Kconfig
> +++ b/drivers/leds/Kconfig
> @@ -384,6 +384,17 @@ 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 LP5036/30/24/18/12/9 LED driver chip"
> +	depends on LEDS_CLASS && REGMAP_I2C
> +	depends on LEDS_CLASS_MULTI_COLOR || !LEDS_CLASS_MULTI_COLOR
> +	help
> +	  If you say yes here you get support for the Texas Instruments
> +	  LP5036, LP5030, LP5024, LP5018, LP5012 and LP5009 LED driver.
> +
> +	  To compile this driver as a module, choose M here: the
> +	  module will be called leds-lp50xx.
> +
>  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 53a752c32e67..68c05faec99e 100644
> --- a/drivers/leds/Makefile
> +++ b/drivers/leds/Makefile
> @@ -49,6 +49,7 @@ obj-$(CONFIG_LEDS_LM3697)		+= leds-lm3697.o
>  obj-$(CONFIG_LEDS_LOCOMO)		+= leds-locomo.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_LP5521)		+= leds-lp5521.o
>  obj-$(CONFIG_LEDS_LP5523)		+= leds-lp5523.o
>  obj-$(CONFIG_LEDS_LP5562)		+= leds-lp5562.o
> diff --git a/drivers/leds/leds-lp50xx.c b/drivers/leds/leds-lp50xx.c
> new file mode 100644
> index 000000000000..407c2f42bac2
> --- /dev/null
> +++ b/drivers/leds/leds-lp50xx.c
> @@ -0,0 +1,783 @@
> +// 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>
> +
> +#include "leds.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)
> +
> +/* There are 3 LED outputs per bank */
> +#define LP50XX_LEDS_PER_MODULE	3
> +
> +#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
> +
> +#define LP5009_MAX_LEDS	(LP5009_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE)
> +#define LP5012_MAX_LEDS	(LP5012_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE)
> +#define LP5018_MAX_LEDS	(LP5018_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE)
> +#define LP5024_MAX_LEDS	(LP5024_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE)
> +#define LP5030_MAX_LEDS	(LP5030_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE)
> +#define LP5036_MAX_LEDS	(LP5036_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE)
> +
> +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: device reset register
> + */
> +struct lp50xx_chip_info {
> +	const struct regmap_config *lp50xx_regmap_config;
> +	int model_id;
> +	u8 max_modules;
> +	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] = {
> +		.model_id = LP5009,
> +		.max_modules = LP5009_MAX_LED_MODULES,
> +		.num_leds = LP5009_MAX_LEDS,
> +		.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] = {
> +		.model_id = LP5012,
> +		.max_modules = LP5012_MAX_LED_MODULES,
> +		.num_leds = LP5012_MAX_LEDS,
> +		.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] = {
> +		.model_id = LP5018,
> +		.max_modules = LP5018_MAX_LED_MODULES,
> +		.num_leds = LP5018_MAX_LEDS,
> +		.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] = {
> +		.model_id = LP5024,
> +		.max_modules = LP5024_MAX_LED_MODULES,
> +		.num_leds = LP5024_MAX_LEDS,
> +		.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] = {
> +		.model_id = LP5030,
> +		.max_modules = LP5030_MAX_LED_MODULES,
> +		.num_leds = LP5030_MAX_LEDS,
> +		.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] = {
> +		.model_id = LP5036,
> +		.max_modules = LP5036_MAX_LED_MODULES,
> +		.num_leds = LP5036_MAX_LEDS,
> +		.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,
> +	},
> +};
> +
> +struct lp50xx_led {
> +	struct led_classdev led_dev;
> +	struct led_classdev_mc mc_cdev;
> +	struct lp50xx *priv;
> +	unsigned long bank_modules;
> +	int led_intensity[LP50XX_LEDS_PER_MODULE];
> +	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: device register map
> + * @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 struct lp50xx_led *mcled_cdev_to_led(struct led_classdev_mc *mc_cdev)
> +{
> +	return container_of(mc_cdev, struct lp50xx_led, mc_cdev);
> +}
> +
> +static int lp50xx_brightness_set(struct led_classdev *cdev,
> +			     enum led_brightness brightness)
> +{
> +	struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev);
> +	struct lp50xx_led *led = mcled_cdev_to_led(mc_dev);
> +	const struct lp50xx_chip_info *led_chip = led->priv->chip_info;
> +	u8 led_offset, reg_val;
> +	int ret = 0;
> +	int i;
> +
> +	mutex_lock(&led->priv->lock);
> +	if (led->ctrl_bank_enabled)
> +		reg_val = led_chip->bank_brt_reg;
> +	else
> +		reg_val = led_chip->led_brightness0_reg +
> +			  led->led_number;
> +
> +	ret = regmap_write(led->priv->regmap, reg_val, brightness);
> +	if (ret) {
> +		dev_err(&led->priv->client->dev,
> +			"Cannot write brightness value %d\n", ret);
> +		goto out;
> +	}
> +
> +	for (i = 0; i < led->mc_cdev.num_colors; i++) {
> +		if (led->ctrl_bank_enabled) {
> +			reg_val = led_chip->bank_mix_reg + i;
> +		} else {
> +			led_offset = (led->led_number * 3) + i;
> +			reg_val = led_chip->mix_out0_reg + led_offset;
> +		}
> +
> +		ret = regmap_write(led->priv->regmap, reg_val,
> +				   mc_dev->subled_info[i].intensity);
> +		if (ret) {
> +			dev_err(&led->priv->client->dev,
> +				"Cannot write intensity value %d\n", ret);
> +			goto out;
> +		}
> +	}
> +out:
> +	mutex_unlock(&led->priv->lock);
> +	return ret;
> +}
> +
> +static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[])
> +{
> +	u8 led_config_lo, led_config_hi;
> +	u32 bank_enable_mask = 0;
> +	int ret;
> +	int i;
> +
> +	for (i = 0; i < priv->chip_info->max_modules; i++) {
> +		if (led_banks[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_config_lo);
> +	if (ret)
> +		return ret;
> +
> +	if (priv->chip_info->model_id >= LP5030)
> +		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_banks[LP5036_MAX_LED_MODULES] = {0};
> +	struct fwnode_handle *child = NULL;
> +	struct fwnode_handle *led_node = NULL;
> +	struct led_init_data init_data = {};
> +	struct led_classdev *led_cdev;
> +	struct mc_subled *mc_led_info;
> +	struct lp50xx_led *led;
> +	int num_colors;
> +	u32 color_id;
> +	int led_number;
> +	size_t i = 0;
> +	int ret = -EINVAL;
> +
> +	priv->enable_gpio = devm_gpiod_get_optional(priv->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->dev, "vled");
> +	if (IS_ERR(priv->regulator))
> +		priv->regulator = NULL;
> +
> +	device_for_each_child_node(priv->dev, child) {
> +		led = &priv->leds[i];
> +		ret = fwnode_property_count_u32(child, "reg");
> +		if (ret < 0) {
> +			dev_err(&priv->client->dev,
> +					"reg property is invalid\n");
> +			return -EINVAL;
> +		}
> +		if (ret > 1) {
> +			priv->num_of_banked_leds = ret;
> +			if (priv->num_of_banked_leds >
> +			    priv->chip_info->max_modules) {
> +				dev_err(&priv->client->dev,
> +					"reg property is invalid\n");
> +				ret = -EINVAL;
> +				fwnode_handle_put(child);
> +				goto child_out;
> +			}
> +
> +			ret = fwnode_property_read_u32_array(child,
> +							     "reg",
> +							     led_banks,
> +							     ret);
> +			if (ret) {
> +				dev_err(&priv->client->dev,
> +					"reg property is missing\n");
> +				fwnode_handle_put(child);
> +				goto child_out;
> +			}
> +
> +			ret = lp50xx_set_banks(priv, led_banks);
> +			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);
> +			if (ret) {
> +				dev_err(&priv->client->dev,
> +					"led reg 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;
> +			}
> +
> +			led->led_number = led_number;
> +		}
> +
> +		init_data.fwnode = child;
> +		fwnode_property_read_string(child, "linux,default-trigger",
> +				    &led->led_dev.default_trigger);

The led_dev property of struct lp50xx_led is used only here and in the
property definition. I don't think it is being read anywhere else. You
need to save default trigger below, into led_cdev. And you can remove
the led_dev property from struct lp50xx_led.

Marek

> +		num_colors = 0;
> +
> +		/* There are only 3 LEDs per module otherwise they should be
> +		 * banked which also is presented as 3 LEDs
> +		 */
> +		mc_led_info = devm_kcalloc(priv->dev, LP50XX_LEDS_PER_MODULE,
> +					   sizeof(*mc_led_info), GFP_KERNEL);
> +		if (!mc_led_info)
> +			return -ENOMEM;
> +
> +		fwnode_for_each_child_node(child, led_node) {
> +			ret = fwnode_property_read_u32(led_node, "color",
> +						       &color_id);
> +			if (ret)
> +				dev_err(priv->dev, "Cannot read color\n");
> +
> +			mc_led_info[num_colors].color_index = color_id;
> +			num_colors++;
> +		}
> +
> +		led->priv = priv;
> +		led->mc_cdev.num_colors = num_colors;
> +		led->mc_cdev.subled_info = mc_led_info;
> +		led_cdev = &led->mc_cdev.led_cdev;
> +		led_cdev->brightness_set_blocking = lp50xx_brightness_set;
> +		ret = devm_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-masked]>");
> +MODULE_LICENSE("GPL v2");

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