backlight/gpio_backlight: Rename field 'fbdev' to 'dev'

Rename the field 'fbdev' in struct gpio_backlight_platform_data and
struct gpio_backlight to 'dev', as they store pointers to the Linux
platform device; not the fbdev device. Makes the code easier to
understand.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Rich Felker <dalias@libc.org>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Lee Jones <lee@kernel.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: linux-sh@vger.kernel.org
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230613110953.24176-5-tzimmermann@suse.de

arch/sh/boards/mach-ecovec24/setup.c

@@ -386,7 +386,7 @@ static struct property_entry gpio_backlight_props[] = {
 };
 
 static struct gpio_backlight_platform_data gpio_backlight_data = {
-	.fbdev = &lcdc_device.dev,
+	.dev = &lcdc_device.dev,
 };
 
 static const struct platform_device_info gpio_backlight_device_info = {

drivers/video/backlight/gpio_backlight.c

@@ -17,7 +17,7 @@
 #include <linux/slab.h>
 
 struct gpio_backlight {
-	struct device *fbdev;
+	struct device *dev;
 	struct gpio_desc *gpiod;
 };
 
@@ -35,7 +35,7 @@ static int gpio_backlight_check_fb(struct backlight_device *bl,
 {
 	struct gpio_backlight *gbl = bl_get_data(bl);
 
-	return gbl->fbdev == NULL || gbl->fbdev == info->device;
+	return !gbl->dev || gbl->dev == info->device;
 }
 
 static const struct backlight_ops gpio_backlight_ops = {
@@ -59,7 +59,7 @@ static int gpio_backlight_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	if (pdata)
-		gbl->fbdev = pdata->fbdev;
+		gbl->dev = pdata->dev;
 
 	def_value = device_property_read_bool(dev, "default-on");
 

include/linux/platform_data/gpio_backlight.h

@@ -8,7 +8,7 @@
 struct device;
 
 struct gpio_backlight_platform_data {
-	struct device *fbdev;
+	struct device *dev;
 };
 
 #endif