add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/video/backlight/gpio_backlight.c
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@@ -35,7 +35,7 @@
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 {
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 	struct gpio_backlight *gbl = bl_get_data(bl);
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-	return gbl->fbdev == NULL || gbl->fbdev == info->dev;
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+	return gbl->fbdev == NULL || gbl->fbdev == info->device;
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 }
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 static const struct backlight_ops gpio_backlight_ops = {
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@@ -87,8 +87,7 @@
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 		/* Not booted with device tree or no phandle link to the node */
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 		bl->props.power = def_value ? FB_BLANK_UNBLANK
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 					    : FB_BLANK_POWERDOWN;
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-	else if (gpiod_get_direction(gbl->gpiod) == 0 &&
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-		 gpiod_get_value_cansleep(gbl->gpiod) == 0)
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+	else if (gpiod_get_value_cansleep(gbl->gpiod) == 0)
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 		bl->props.power = FB_BLANK_POWERDOWN;
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 	else
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 		bl->props.power = FB_BLANK_UNBLANK;