[PATCH v6 13/22] backlight: Probe backlight devices on demand
From: Tomeu Vizoso <hidden>
Date: 2015-09-21 14:04:02
Also in:
linux-acpi, linux-arm-kernel, lkml
Subsystem:
backlight class/subsystem, framebuffer layer, the rest · Maintainers:
Lee Jones, Daniel Thompson, Jingoo Han, Helge Deller, Linus Torvalds
When looking up a backlight device through its OF node, probe it if it hasn't already. The goal is to reduce deferred probes to a minimum, as it makes it very cumbersome to find out why a device failed to probe, and can introduce very big delays in when a critical device is probed. Signed-off-by: Tomeu Vizoso <redacted> --- 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 bddc8b17a4d8..9bcdc16eacdf 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c@@ -16,6 +16,7 @@ #include <linux/err.h> #include <linux/fb.h> #include <linux/slab.h> +#include <linux/of_device.h> #ifdef CONFIG_PMAC_BACKLIGHT #include <asm/backlight.h>
@@ -559,6 +560,8 @@ struct backlight_device *of_find_backlight_by_node(struct device_node *node) { struct device *dev; + of_device_probe(node); + dev = class_find_device(backlight_class, NULL, node, of_parent_match); return dev ? to_backlight_device(dev) : NULL;
--
2.4.3