Re: [PATCH v3] backlight: pwm_bl: Switch to full GPIO descriptor

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On Mon, Feb 10, 2020 at 11:15:46AM +0100, Linus Walleij wrote:
> The PWM backlight still supports passing a enable GPIO line as
> platform data using the legacy <linux/gpio.h> API.
> 
> It turns out that ever board using this mechanism except one
> is pass .enable_gpio = -1. So we drop all these cargo-culted -1's
> from all instances of this platform data in the kernel.
> 
> The remaning board, Palm TC, is converted to pass a machine
> descriptior table with the "enable" GPIO instead, and delete the
> platform data entry for enable_gpio and the code handling it
> and things should work smoothly with the new API.
> 
> Cc: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
> Cc: Guan Xuetao <gxt@xxxxxxxxxx>
> Acked-by: Robert Jarzmik <robert.jarzmik@xxxxxxx>
> Reviewed-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>

Reviewed-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx>


> ---
> ChangeLog v2->v3:
> - Collect Robert's ACK.
> ChangeLog v1->v2:
> - Located a missing removal of .enable_gpio in the Palm TC
>   board file, pointed out by Daniel.
> - Grepped to ascertain there is not a single instance of
>   the string "enable_gpio" in the affected board files.
> ---
>  arch/arm/mach-pxa/cm-x300.c               |  1 -
>  arch/arm/mach-pxa/colibri-pxa270-income.c |  1 -
>  arch/arm/mach-pxa/ezx.c                   |  1 -
>  arch/arm/mach-pxa/hx4700.c                |  1 -
>  arch/arm/mach-pxa/lpd270.c                |  1 -
>  arch/arm/mach-pxa/magician.c              |  1 -
>  arch/arm/mach-pxa/mainstone.c             |  1 -
>  arch/arm/mach-pxa/mioa701.c               |  1 -
>  arch/arm/mach-pxa/palm27x.c               |  1 -
>  arch/arm/mach-pxa/palmtc.c                | 11 ++++++++++-
>  arch/arm/mach-pxa/palmte2.c               |  1 -
>  arch/arm/mach-pxa/pcm990-baseboard.c      |  1 -
>  arch/arm/mach-pxa/tavorevb.c              |  2 --
>  arch/arm/mach-pxa/viper.c                 |  1 -
>  arch/arm/mach-pxa/z2.c                    |  2 --
>  arch/arm/mach-pxa/zylonite.c              |  1 -
>  arch/arm/mach-s3c24xx/mach-h1940.c        |  1 -
>  arch/arm/mach-s3c24xx/mach-rx1950.c       |  1 -
>  arch/arm/mach-s3c64xx/dev-backlight.c     |  3 ---
>  arch/arm/mach-s3c64xx/mach-crag6410.c     |  1 -
>  arch/arm/mach-s3c64xx/mach-hmt.c          |  1 -
>  arch/arm/mach-s3c64xx/mach-smartq.c       |  1 -
>  arch/arm/mach-s3c64xx/mach-smdk6410.c     |  2 +-
>  arch/unicore32/kernel/puv3-nb0916.c       |  1 -
>  drivers/video/backlight/pwm_bl.c          | 19 -------------------
>  include/linux/pwm_backlight.h             |  2 --
>  26 files changed, 11 insertions(+), 49 deletions(-)
> 
> diff --git a/arch/arm/mach-pxa/cm-x300.c b/arch/arm/mach-pxa/cm-x300.c
> index 425855f456f2..2e35354b61f5 100644
> --- a/arch/arm/mach-pxa/cm-x300.c
> +++ b/arch/arm/mach-pxa/cm-x300.c
> @@ -312,7 +312,6 @@ static struct pwm_lookup cm_x300_pwm_lookup[] = {
>  static struct platform_pwm_backlight_data cm_x300_backlight_data = {
>  	.max_brightness	= 100,
>  	.dft_brightness	= 100,
> -	.enable_gpio	= -1,
>  };
>  
>  static struct platform_device cm_x300_backlight_device = {
> diff --git a/arch/arm/mach-pxa/colibri-pxa270-income.c b/arch/arm/mach-pxa/colibri-pxa270-income.c
> index dbad2f13706c..e5879e8b0682 100644
> --- a/arch/arm/mach-pxa/colibri-pxa270-income.c
> +++ b/arch/arm/mach-pxa/colibri-pxa270-income.c
> @@ -202,7 +202,6 @@ static struct pwm_lookup income_pwm_lookup[] = {
>  static struct platform_pwm_backlight_data income_backlight_data = {
>  	.max_brightness	= 0x3ff,
>  	.dft_brightness	= 0x1ff,
> -	.enable_gpio	= -1,
>  };
>  
>  static struct platform_device income_backlight = {
> diff --git a/arch/arm/mach-pxa/ezx.c b/arch/arm/mach-pxa/ezx.c
> index ec10851b63cf..eb85950e7c0e 100644
> --- a/arch/arm/mach-pxa/ezx.c
> +++ b/arch/arm/mach-pxa/ezx.c
> @@ -55,7 +55,6 @@ static struct pwm_lookup ezx_pwm_lookup[] __maybe_unused = {
>  static struct platform_pwm_backlight_data ezx_backlight_data = {
>  	.max_brightness	= 1023,
>  	.dft_brightness	= 1023,
> -	.enable_gpio	= -1,
>  };
>  
>  static struct platform_device ezx_backlight_device = {
> diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c
> index 238a751a8797..1d4c5db54be2 100644
> --- a/arch/arm/mach-pxa/hx4700.c
> +++ b/arch/arm/mach-pxa/hx4700.c
> @@ -556,7 +556,6 @@ static struct platform_device hx4700_lcd = {
>  static struct platform_pwm_backlight_data backlight_data = {
>  	.max_brightness = 200,
>  	.dft_brightness = 100,
> -	.enable_gpio    = -1,
>  };
>  
>  static struct platform_device backlight = {
> diff --git a/arch/arm/mach-pxa/lpd270.c b/arch/arm/mach-pxa/lpd270.c
> index 20e00e970385..6fc40bc06910 100644
> --- a/arch/arm/mach-pxa/lpd270.c
> +++ b/arch/arm/mach-pxa/lpd270.c
> @@ -277,7 +277,6 @@ static struct pwm_lookup lpd270_pwm_lookup[] = {
>  static struct platform_pwm_backlight_data lpd270_backlight_data = {
>  	.max_brightness	= 1,
>  	.dft_brightness	= 1,
> -	.enable_gpio	= -1,
>  };
>  
>  static struct platform_device lpd270_backlight_device = {
> diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
> index 5d0591f93f4d..cd9fa465b9b2 100644
> --- a/arch/arm/mach-pxa/magician.c
> +++ b/arch/arm/mach-pxa/magician.c
> @@ -401,7 +401,6 @@ static void magician_backlight_exit(struct device *dev)
>  static struct platform_pwm_backlight_data backlight_data = {
>  	.max_brightness	= 272,
>  	.dft_brightness	= 100,
> -	.enable_gpio	= -1,
>  	.init		= magician_backlight_init,
>  	.notify		= magician_backlight_notify,
>  	.exit		= magician_backlight_exit,
> diff --git a/arch/arm/mach-pxa/mainstone.c b/arch/arm/mach-pxa/mainstone.c
> index 1b7882920164..d1010ec26e9f 100644
> --- a/arch/arm/mach-pxa/mainstone.c
> +++ b/arch/arm/mach-pxa/mainstone.c
> @@ -256,7 +256,6 @@ static struct pwm_lookup mainstone_pwm_lookup[] = {
>  static struct platform_pwm_backlight_data mainstone_backlight_data = {
>  	.max_brightness	= 1023,
>  	.dft_brightness	= 1023,
> -	.enable_gpio	= -1,
>  };
>  
>  static struct platform_device mainstone_backlight_device = {
> diff --git a/arch/arm/mach-pxa/mioa701.c b/arch/arm/mach-pxa/mioa701.c
> index 0b8bae9610f1..d3af80317f2d 100644
> --- a/arch/arm/mach-pxa/mioa701.c
> +++ b/arch/arm/mach-pxa/mioa701.c
> @@ -176,7 +176,6 @@ static struct pwm_lookup mioa701_pwm_lookup[] = {
>  static struct platform_pwm_backlight_data mioa701_backlight_data = {
>  	.max_brightness	= 100,
>  	.dft_brightness	= 50,
> -	.enable_gpio	= -1,
>  };
>  
>  /*
> diff --git a/arch/arm/mach-pxa/palm27x.c b/arch/arm/mach-pxa/palm27x.c
> index b600b63af3a6..0d246a1aebbc 100644
> --- a/arch/arm/mach-pxa/palm27x.c
> +++ b/arch/arm/mach-pxa/palm27x.c
> @@ -318,7 +318,6 @@ static void palm27x_backlight_exit(struct device *dev)
>  static struct platform_pwm_backlight_data palm27x_backlight_data = {
>  	.max_brightness	= 0xfe,
>  	.dft_brightness	= 0x7e,
> -	.enable_gpio	= -1,
>  	.init		= palm27x_backlight_init,
>  	.notify		= palm27x_backlight_notify,
>  	.exit		= palm27x_backlight_exit,
> diff --git a/arch/arm/mach-pxa/palmtc.c b/arch/arm/mach-pxa/palmtc.c
> index fda9deaaae02..455cb8ccaf26 100644
> --- a/arch/arm/mach-pxa/palmtc.c
> +++ b/arch/arm/mach-pxa/palmtc.c
> @@ -174,6 +174,15 @@ static inline void palmtc_keys_init(void) {}
>   * Backlight
>   ******************************************************************************/
>  #if defined(CONFIG_BACKLIGHT_PWM) || defined(CONFIG_BACKLIGHT_PWM_MODULE)
> +
> +static struct gpiod_lookup_table palmtc_pwm_bl_gpio_table = {
> +	.dev_id = "pwm-backlight.0",
> +	.table = {
> +		GPIO_LOOKUP("gpio-pxa", GPIO_NR_PALMTC_BL_POWER,
> +			    "enable", GPIO_ACTIVE_HIGH),
> +	},
> +};
> +
>  static struct pwm_lookup palmtc_pwm_lookup[] = {
>  	PWM_LOOKUP("pxa25x-pwm.1", 0, "pwm-backlight.0", NULL, PALMTC_PERIOD_NS,
>  		   PWM_POLARITY_NORMAL),
> @@ -182,7 +191,6 @@ static struct pwm_lookup palmtc_pwm_lookup[] = {
>  static struct platform_pwm_backlight_data palmtc_backlight_data = {
>  	.max_brightness	= PALMTC_MAX_INTENSITY,
>  	.dft_brightness	= PALMTC_MAX_INTENSITY,
> -	.enable_gpio	= GPIO_NR_PALMTC_BL_POWER,
>  };
>  
>  static struct platform_device palmtc_backlight = {
> @@ -195,6 +203,7 @@ static struct platform_device palmtc_backlight = {
>  
>  static void __init palmtc_pwm_init(void)
>  {
> +	gpiod_add_lookup_table(&palmtc_pwm_bl_gpio_table);
>  	pwm_add_table(palmtc_pwm_lookup, ARRAY_SIZE(palmtc_pwm_lookup));
>  	platform_device_register(&palmtc_backlight);
>  }
> diff --git a/arch/arm/mach-pxa/palmte2.c b/arch/arm/mach-pxa/palmte2.c
> index 7171014fd311..e3bcf58b4e63 100644
> --- a/arch/arm/mach-pxa/palmte2.c
> +++ b/arch/arm/mach-pxa/palmte2.c
> @@ -175,7 +175,6 @@ static void palmte2_backlight_exit(struct device *dev)
>  static struct platform_pwm_backlight_data palmte2_backlight_data = {
>  	.max_brightness	= PALMTE2_MAX_INTENSITY,
>  	.dft_brightness	= PALMTE2_MAX_INTENSITY,
> -	.enable_gpio	= -1,
>  	.init		= palmte2_backlight_init,
>  	.notify		= palmte2_backlight_notify,
>  	.exit		= palmte2_backlight_exit,
> diff --git a/arch/arm/mach-pxa/pcm990-baseboard.c b/arch/arm/mach-pxa/pcm990-baseboard.c
> index cb1c56769fbc..bf613f88d70b 100644
> --- a/arch/arm/mach-pxa/pcm990-baseboard.c
> +++ b/arch/arm/mach-pxa/pcm990-baseboard.c
> @@ -154,7 +154,6 @@ static struct pwm_lookup pcm990_pwm_lookup[] = {
>  static struct platform_pwm_backlight_data pcm990_backlight_data = {
>  	.max_brightness	= 1023,
>  	.dft_brightness	= 1023,
> -	.enable_gpio	= -1,
>  };
>  
>  static struct platform_device pcm990_backlight_device = {
> diff --git a/arch/arm/mach-pxa/tavorevb.c b/arch/arm/mach-pxa/tavorevb.c
> index 93466fa3b0fe..a15eb3b9484d 100644
> --- a/arch/arm/mach-pxa/tavorevb.c
> +++ b/arch/arm/mach-pxa/tavorevb.c
> @@ -178,13 +178,11 @@ static struct platform_pwm_backlight_data tavorevb_backlight_data[] = {
>  		/* primary backlight */
>  		.max_brightness	= 100,
>  		.dft_brightness	= 100,
> -		.enable_gpio	= -1,
>  	},
>  	[1] = {
>  		/* secondary backlight */
>  		.max_brightness	= 100,
>  		.dft_brightness	= 100,
> -		.enable_gpio	= -1,
>  	},
>  };
>  
> diff --git a/arch/arm/mach-pxa/viper.c b/arch/arm/mach-pxa/viper.c
> index c06031da6676..3aa34e9a15d3 100644
> --- a/arch/arm/mach-pxa/viper.c
> +++ b/arch/arm/mach-pxa/viper.c
> @@ -404,7 +404,6 @@ static void viper_backlight_exit(struct device *dev)
>  static struct platform_pwm_backlight_data viper_backlight_data = {
>  	.max_brightness	= 100,
>  	.dft_brightness	= 100,
> -	.enable_gpio	= -1,
>  	.init		= viper_backlight_init,
>  	.notify		= viper_backlight_notify,
>  	.exit		= viper_backlight_exit,
> diff --git a/arch/arm/mach-pxa/z2.c b/arch/arm/mach-pxa/z2.c
> index 900cefc4c5ea..21fd76bb09cd 100644
> --- a/arch/arm/mach-pxa/z2.c
> +++ b/arch/arm/mach-pxa/z2.c
> @@ -210,13 +210,11 @@ static struct platform_pwm_backlight_data z2_backlight_data[] = {
>  		/* Keypad Backlight */
>  		.max_brightness	= 1023,
>  		.dft_brightness	= 0,
> -		.enable_gpio	= -1,
>  	},
>  	[1] = {
>  		/* LCD Backlight */
>  		.max_brightness	= 1023,
>  		.dft_brightness	= 512,
> -		.enable_gpio	= -1,
>  	},
>  };
>  
> diff --git a/arch/arm/mach-pxa/zylonite.c b/arch/arm/mach-pxa/zylonite.c
> index bf2ab5bd49ec..79f0025fa17a 100644
> --- a/arch/arm/mach-pxa/zylonite.c
> +++ b/arch/arm/mach-pxa/zylonite.c
> @@ -117,7 +117,6 @@ static struct pwm_lookup zylonite_pwm_lookup[] = {
>  static struct platform_pwm_backlight_data zylonite_backlight_data = {
>  	.max_brightness	= 100,
>  	.dft_brightness	= 100,
> -	.enable_gpio	= -1,
>  };
>  
>  static struct platform_device zylonite_backlight_device = {
> diff --git a/arch/arm/mach-s3c24xx/mach-h1940.c b/arch/arm/mach-s3c24xx/mach-h1940.c
> index 74d6b68e91c7..e1c372e5447b 100644
> --- a/arch/arm/mach-s3c24xx/mach-h1940.c
> +++ b/arch/arm/mach-s3c24xx/mach-h1940.c
> @@ -516,7 +516,6 @@ static void h1940_backlight_exit(struct device *dev)
>  static struct platform_pwm_backlight_data backlight_data = {
>  	.max_brightness = 100,
>  	.dft_brightness = 50,
> -	.enable_gpio    = -1,
>  	.init           = h1940_backlight_init,
>  	.notify		= h1940_backlight_notify,
>  	.exit           = h1940_backlight_exit,
> diff --git a/arch/arm/mach-s3c24xx/mach-rx1950.c b/arch/arm/mach-s3c24xx/mach-rx1950.c
> index 03d8f27cdc32..fde98b175c75 100644
> --- a/arch/arm/mach-s3c24xx/mach-rx1950.c
> +++ b/arch/arm/mach-s3c24xx/mach-rx1950.c
> @@ -534,7 +534,6 @@ static int rx1950_backlight_notify(struct device *dev, int brightness)
>  static struct platform_pwm_backlight_data rx1950_backlight_data = {
>  	.max_brightness = 24,
>  	.dft_brightness = 4,
> -	.enable_gpio = -1,
>  	.init = rx1950_backlight_init,
>  	.notify = rx1950_backlight_notify,
>  	.exit = rx1950_backlight_exit,
> diff --git a/arch/arm/mach-s3c64xx/dev-backlight.c b/arch/arm/mach-s3c64xx/dev-backlight.c
> index 799cfdf0606b..09e6da305f60 100644
> --- a/arch/arm/mach-s3c64xx/dev-backlight.c
> +++ b/arch/arm/mach-s3c64xx/dev-backlight.c
> @@ -65,7 +65,6 @@ static struct samsung_bl_drvdata samsung_dfl_bl_data __initdata = {
>  	.plat_data = {
>  		.max_brightness = 255,
>  		.dft_brightness = 255,
> -		.enable_gpio    = -1,
>  		.init           = samsung_bl_init,
>  		.exit           = samsung_bl_exit,
>  	},
> @@ -111,8 +110,6 @@ void __init samsung_bl_set(struct samsung_bl_gpio_info *gpio_info,
>  		samsung_bl_data->dft_brightness = bl_data->dft_brightness;
>  	if (bl_data->lth_brightness)
>  		samsung_bl_data->lth_brightness = bl_data->lth_brightness;
> -	if (bl_data->enable_gpio >= 0)
> -		samsung_bl_data->enable_gpio = bl_data->enable_gpio;
>  	if (bl_data->init)
>  		samsung_bl_data->init = bl_data->init;
>  	if (bl_data->notify)
> diff --git a/arch/arm/mach-s3c64xx/mach-crag6410.c b/arch/arm/mach-s3c64xx/mach-crag6410.c
> index 8ec6a4f5eb05..da9654255e3f 100644
> --- a/arch/arm/mach-s3c64xx/mach-crag6410.c
> +++ b/arch/arm/mach-s3c64xx/mach-crag6410.c
> @@ -114,7 +114,6 @@ static struct pwm_lookup crag6410_pwm_lookup[] = {
>  static struct platform_pwm_backlight_data crag6410_backlight_data = {
>  	.max_brightness	= 1000,
>  	.dft_brightness	= 600,
> -	.enable_gpio	= -1,
>  };
>  
>  static struct platform_device crag6410_backlight_device = {
> diff --git a/arch/arm/mach-s3c64xx/mach-hmt.c b/arch/arm/mach-s3c64xx/mach-hmt.c
> index bfe9881d12cc..e7080215c624 100644
> --- a/arch/arm/mach-s3c64xx/mach-hmt.c
> +++ b/arch/arm/mach-s3c64xx/mach-hmt.c
> @@ -115,7 +115,6 @@ static void hmt_bl_exit(struct device *dev)
>  static struct platform_pwm_backlight_data hmt_backlight_data = {
>  	.max_brightness	= 100 * 256,
>  	.dft_brightness	= 40 * 256,
> -	.enable_gpio	= -1,
>  	.init		= hmt_bl_init,
>  	.notify		= hmt_bl_notify,
>  	.exit		= hmt_bl_exit,
> diff --git a/arch/arm/mach-s3c64xx/mach-smartq.c b/arch/arm/mach-s3c64xx/mach-smartq.c
> index 829d5dbd69ee..5025db607c0f 100644
> --- a/arch/arm/mach-s3c64xx/mach-smartq.c
> +++ b/arch/arm/mach-s3c64xx/mach-smartq.c
> @@ -150,7 +150,6 @@ static int smartq_bl_init(struct device *dev)
>  static struct platform_pwm_backlight_data smartq_backlight_data = {
>  	.max_brightness	= 1000,
>  	.dft_brightness	= 600,
> -	.enable_gpio	= -1,
>  	.init		= smartq_bl_init,
>  };
>  
> diff --git a/arch/arm/mach-s3c64xx/mach-smdk6410.c b/arch/arm/mach-s3c64xx/mach-smdk6410.c
> index 908e5aa831c8..56f406c0c3dd 100644
> --- a/arch/arm/mach-s3c64xx/mach-smdk6410.c
> +++ b/arch/arm/mach-s3c64xx/mach-smdk6410.c
> @@ -623,7 +623,7 @@ static struct pwm_lookup smdk6410_pwm_lookup[] = {
>  };
>  
>  static struct platform_pwm_backlight_data smdk6410_bl_data = {
> -	.enable_gpio = -1,
> +	/* Intentionally blank */
>  };
>  
>  static struct dwc2_hsotg_plat smdk6410_hsotg_pdata;
> diff --git a/arch/unicore32/kernel/puv3-nb0916.c b/arch/unicore32/kernel/puv3-nb0916.c
> index a3bf2ffc54dd..e251f5028396 100644
> --- a/arch/unicore32/kernel/puv3-nb0916.c
> +++ b/arch/unicore32/kernel/puv3-nb0916.c
> @@ -55,7 +55,6 @@ static struct pwm_lookup nb0916_pwm_lookup[] = {
>  static struct platform_pwm_backlight_data nb0916_backlight_data = {
>  	.max_brightness	= 100,
>  	.dft_brightness	= 100,
> -	.enable_gpio	= -1,
>  };
>  
>  static struct gpio_keys_button nb0916_gpio_keys[] = {
> diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
> index efb4efc2a13d..82b8d7594701 100644
> --- a/drivers/video/backlight/pwm_bl.c
> +++ b/drivers/video/backlight/pwm_bl.c
> @@ -7,7 +7,6 @@
>  
>  #include <linux/delay.h>
>  #include <linux/gpio/consumer.h>
> -#include <linux/gpio.h>
>  #include <linux/module.h>
>  #include <linux/kernel.h>
>  #include <linux/init.h>
> @@ -258,8 +257,6 @@ static int pwm_backlight_parse_dt(struct device *dev,
>  			     &data->post_pwm_on_delay);
>  	of_property_read_u32(node, "pwm-off-delay-ms", &data->pwm_off_delay);
>  
> -	data->enable_gpio = -EINVAL;
> -
>  	/*
>  	 * Determine the number of brightness levels, if this property is not
>  	 * set a default table of brightness levels will be used.
> @@ -502,22 +499,6 @@ static int pwm_backlight_probe(struct platform_device *pdev)
>  		goto err_alloc;
>  	}
>  
> -	/*
> -	 * Compatibility fallback for drivers still using the integer GPIO
> -	 * platform data. Must go away soon.
> -	 */
> -	if (!pb->enable_gpio && gpio_is_valid(data->enable_gpio)) {
> -		ret = devm_gpio_request_one(&pdev->dev, data->enable_gpio,
> -					    GPIOF_OUT_INIT_HIGH, "enable");
> -		if (ret < 0) {
> -			dev_err(&pdev->dev, "failed to request GPIO#%d: %d\n",
> -				data->enable_gpio, ret);
> -			goto err_alloc;
> -		}
> -
> -		pb->enable_gpio = gpio_to_desc(data->enable_gpio);
> -	}
> -
>  	/*
>  	 * If the GPIO is not known to be already configured as output, that
>  	 * is, if gpiod_get_direction returns either 1 or -EINVAL, change the
> diff --git a/include/linux/pwm_backlight.h b/include/linux/pwm_backlight.h
> index 8ea265a022fd..06086cb93b6f 100644
> --- a/include/linux/pwm_backlight.h
> +++ b/include/linux/pwm_backlight.h
> @@ -16,8 +16,6 @@ struct platform_pwm_backlight_data {
>  	unsigned int *levels;
>  	unsigned int post_pwm_on_delay;
>  	unsigned int pwm_off_delay;
> -	/* TODO remove once all users are switched to gpiod_* API */
> -	int enable_gpio;
>  	int (*init)(struct device *dev);
>  	int (*notify)(struct device *dev, int brightness);
>  	void (*notify_after)(struct device *dev, int brightness);
> -- 
> 2.23.0
> 
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