[PATCH 15/21] backlight: Probe backlight devices on demand

Tomeu Vizoso
2015-05-25T15:01:12Z

When looking up a backlight device through its DT node, ensure that the
corresponding device has been registered.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
---
drivers/video/backlight/backlight.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index bddc8b1..fe7833b 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -12,6 +12,7 @@
#include <linux/device.h>
#include <linux/backlight.h>
#include <linux/notifier.h>
+#include <linux/of_platform.h>
#include <linux/ctype.h>
#include <linux/err.h>
#include <linux/fb.h>
@@ -559,6 +560,8 @@ struct backlight_device *of_find_backlight_by_node(struct device_node *node)
{
struct device *dev;

+ of_platform_device_ensure(node);
+
dev = class_find_device(backlight_class, NULL, node, of_parent_match);

return dev ? to_backlight_device(dev) : NULL;
--
2.4.1