Document the binding for the TLC591xx LED driver.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Tested-by: NImre Kaloz <kaloz@openwrt.org>
Cc: Matthew.Fatheree@belkin.com
Acked-by: NJacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: NBryan Wu <cooloney@gmail.com>