backlight: add of_find_backlight_by_node()

This function finds the struct backlight_device for a given device tree
node.  A dummy function is provided so that it safely compiles out if OF
support is disabled.

[[email protected]: Don't use IS_ENABLED(CONFIG_OF)]
Signed-off-by: Thierry Reding <[email protected]>
Acked-by: Jingoo Han <[email protected]>
Reviewed-by: Grant Likely <[email protected]>
Cc: Thierry Reding <[email protected]>
Reviewed-by: Grant Likely <[email protected]>
Acked-by: Jingoo Han <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions