backlight: pwm_bl: Switch to full GPIO descriptor

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.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/arch/arm/mach-pxa/cm-x300.c b/arch/arm/mach-pxa/cm-x300.c
index 425855f..2e35354 100644
--- a/arch/arm/mach-pxa/cm-x300.c
+++ b/arch/arm/mach-pxa/cm-x300.c
@@ -312,7 +312,6 @@
 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 dbad2f1..e5879e8 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 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 ec10851..eb85950 100644
--- a/arch/arm/mach-pxa/ezx.c
+++ b/arch/arm/mach-pxa/ezx.c
@@ -55,7 +55,6 @@
 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 238a751..1d4c5db 100644
--- a/arch/arm/mach-pxa/hx4700.c
+++ b/arch/arm/mach-pxa/hx4700.c
@@ -556,7 +556,6 @@
 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 20e00e9..6fc40bc 100644
--- a/arch/arm/mach-pxa/lpd270.c
+++ b/arch/arm/mach-pxa/lpd270.c
@@ -277,7 +277,6 @@
 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 5d0591f..cd9fa46 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -401,7 +401,6 @@
 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 1b78829..d1010ec 100644
--- a/arch/arm/mach-pxa/mainstone.c
+++ b/arch/arm/mach-pxa/mainstone.c
@@ -256,7 +256,6 @@
 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 0b8bae9..d3af803 100644
--- a/arch/arm/mach-pxa/mioa701.c
+++ b/arch/arm/mach-pxa/mioa701.c
@@ -176,7 +176,6 @@
 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 b600b63..0d246a1 100644
--- a/arch/arm/mach-pxa/palm27x.c
+++ b/arch/arm/mach-pxa/palm27x.c
@@ -318,7 +318,6 @@
 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 fda9dea..455cb8c 100644
--- a/arch/arm/mach-pxa/palmtc.c
+++ b/arch/arm/mach-pxa/palmtc.c
@@ -174,6 +174,15 @@
  * 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 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 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 7171014..e3bcf58 100644
--- a/arch/arm/mach-pxa/palmte2.c
+++ b/arch/arm/mach-pxa/palmte2.c
@@ -175,7 +175,6 @@
 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 cb1c567..bf613f8 100644
--- a/arch/arm/mach-pxa/pcm990-baseboard.c
+++ b/arch/arm/mach-pxa/pcm990-baseboard.c
@@ -154,7 +154,6 @@
 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 93466fa..a15eb3b 100644
--- a/arch/arm/mach-pxa/tavorevb.c
+++ b/arch/arm/mach-pxa/tavorevb.c
@@ -178,13 +178,11 @@
 		/* 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 c06031d..3aa34e9 100644
--- a/arch/arm/mach-pxa/viper.c
+++ b/arch/arm/mach-pxa/viper.c
@@ -404,7 +404,6 @@
 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 900cefc..21fd76b 100644
--- a/arch/arm/mach-pxa/z2.c
+++ b/arch/arm/mach-pxa/z2.c
@@ -210,13 +210,11 @@
 		/* 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 bf2ab5b..79f0025 100644
--- a/arch/arm/mach-pxa/zylonite.c
+++ b/arch/arm/mach-pxa/zylonite.c
@@ -117,7 +117,6 @@
 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 74d6b68..e1c372e 100644
--- a/arch/arm/mach-s3c24xx/mach-h1940.c
+++ b/arch/arm/mach-s3c24xx/mach-h1940.c
@@ -516,7 +516,6 @@
 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 03d8f27..fde98b1 100644
--- a/arch/arm/mach-s3c24xx/mach-rx1950.c
+++ b/arch/arm/mach-s3c24xx/mach-rx1950.c
@@ -534,7 +534,6 @@
 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 799cfdf..09e6da30 100644
--- a/arch/arm/mach-s3c64xx/dev-backlight.c
+++ b/arch/arm/mach-s3c64xx/dev-backlight.c
@@ -65,7 +65,6 @@
 	.plat_data = {
 		.max_brightness = 255,
 		.dft_brightness = 255,
-		.enable_gpio    = -1,
 		.init           = samsung_bl_init,
 		.exit           = samsung_bl_exit,
 	},
@@ -111,8 +110,6 @@
 		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 8ec6a4f..da96542 100644
--- a/arch/arm/mach-s3c64xx/mach-crag6410.c
+++ b/arch/arm/mach-s3c64xx/mach-crag6410.c
@@ -114,7 +114,6 @@
 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 bfe9881..e708021 100644
--- a/arch/arm/mach-s3c64xx/mach-hmt.c
+++ b/arch/arm/mach-s3c64xx/mach-hmt.c
@@ -115,7 +115,6 @@
 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 829d5db..5025db6 100644
--- a/arch/arm/mach-s3c64xx/mach-smartq.c
+++ b/arch/arm/mach-s3c64xx/mach-smartq.c
@@ -150,7 +150,6 @@
 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 908e5aa..56f406c 100644
--- a/arch/arm/mach-s3c64xx/mach-smdk6410.c
+++ b/arch/arm/mach-s3c64xx/mach-smdk6410.c
@@ -623,7 +623,7 @@
 };
 
 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 a3bf2ff..e251f50 100644
--- a/arch/unicore32/kernel/puv3-nb0916.c
+++ b/arch/unicore32/kernel/puv3-nb0916.c
@@ -55,7 +55,6 @@
 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 efb4efc..82b8d75 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 @@
 			     &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.
@@ -503,22 +500,6 @@
 	}
 
 	/*
-	 * 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
 	 * direction to output and set the GPIO as active.
diff --git a/include/linux/pwm_backlight.h b/include/linux/pwm_backlight.h
index 8ea265a..06086cb 100644
--- a/include/linux/pwm_backlight.h
+++ b/include/linux/pwm_backlight.h
@@ -16,8 +16,6 @@
 	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);