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drm/tinydrm: Replace tinydrm_of_find_backlight with of_find_backlight

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Remove tinydrm_of_find_backlight from tinydrm-helpers.c. We now have
a generic of_find_backlight defined in backlight.c. Let the callers
of tinydrm_of_find_backlight call of_find_backlight. Also, remove
select BACKLIGHT_LCD_SUPPORT and select BACKLIGHT_CLASS_DEVICE from
tinydrm/Kconfig as it is a hack that is no longer needed.

Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Meghana Madhyastha <meghana.madhyastha@gmail.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/11dd1cabd098a730d07ab04c5987b139d14d8b21.1516810725.git.meghana.madhyastha@gmail.com
This commit is contained in:
Meghana Madhyastha
2018-01-24 16:36:09 +00:00
committed by Sean Paul
parent 414147e8a3
commit d1a2e7004b
5 changed files with 4 additions and 46 deletions
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40
drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c
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@@ -236,46 +236,6 @@ void tinydrm_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb,
}
EXPORT_SYMBOL(tinydrm_xrgb8888_to_gray8);
/**
* tinydrm_of_find_backlight - Find backlight device in device-tree
* @dev: Device
*
* This function looks for a DT node pointed to by a property named 'backlight'
* and uses of_find_backlight_by_node() to get the backlight device.
* Additionally if the brightness property is zero, it is set to
* max_brightness.
*
* Returns:
* NULL if there's no backlight property.
* Error pointer -EPROBE_DEFER if the DT node is found, but no backlight device
* is found.
* If the backlight device is found, a pointer to the structure is returned.
*/
struct backlight_device *tinydrm_of_find_backlight(struct device *dev)
{
struct backlight_device *backlight;
struct device_node *np;
np = of_parse_phandle(dev->of_node, "backlight", 0);
if (!np)
return NULL;
backlight = of_find_backlight_by_node(np);
of_node_put(np);
if (!backlight)
return ERR_PTR(-EPROBE_DEFER);
if (!backlight->props.brightness) {
backlight->props.brightness = backlight->props.max_brightness;
DRM_DEBUG_KMS("Backlight brightness set to %d\n",
backlight->props.brightness);
}
return backlight;
}
EXPORT_SYMBOL(tinydrm_of_find_backlight);
#if IS_ENABLED(CONFIG_SPI)
/**