[PATCH v2 07/12] backlight: register dependency parser for firmware nodes
From: Tomeu Vizoso <hidden>
Date: 2015-07-01 09:44:37
Also in:
alsa-devel, dri-devel, linux-acpi, linux-devicetree, linux-gpio, linux-pwm, lkml
Subsystem:
backlight class/subsystem, framebuffer layer, the rest · Maintainers:
Lee Jones, Daniel Thompson, Jingoo Han, Helge Deller, Linus Torvalds
So others can find out what depends on backlight devices, as specified in bindings/video/backlight/backlight.txt. Signed-off-by: Tomeu Vizoso <redacted> --- Changes in v2: None drivers/video/backlight/backlight.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index bddc8b1..ab8f5e7 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c@@ -566,8 +566,22 @@ struct backlight_device *of_find_backlight_by_node(struct device_node *node) EXPORT_SYMBOL(of_find_backlight_by_node); #endif +static void backlight_get_dependencies(struct fwnode_handle *fwnode, + struct list_head *deps) +{ + struct device_node *np; + + np = of_parse_phandle(to_of_node(fwnode), "backlight", 0); + if (!np) + return; + + fwnode_add_dependency(&np->fwnode, deps); +} + static void __exit backlight_class_exit(void) { + fwnode_remove_dependency_parser(backlight_get_dependencies); + class_destroy(backlight_class); }
@@ -586,6 +600,8 @@ static int __init backlight_class_init(void) mutex_init(&backlight_dev_list_mutex); BLOCKING_INIT_NOTIFIER_HEAD(&backlight_notifier); + fwnode_add_dependency_parser(backlight_get_dependencies); + return 0; }
--
2.4.1