This series makes it possible for the LED core to manage the power supply of a LED. It uses the regulator API to disable/enable the power if when the LED is turned on/off. This is especially useful in situations where the LED driver/controller is not supplying the power. Because updating a regulator state can block, it is always defered to set_brightness_delayed(). changes in v4: - Add a new patch to make led_set_brightness_sync() use led_set_brightness_nosleep() and then wait the work to be done - Rework how the core knows how the regulator needs to be updated. changes in v3: - reword device-tree description - reword commit log - remove regulator updates from functions used in atomic context. If the regulator must be updated, it is defered to a workqueue. - Fix led_set_brightness_sync() to work with the non-blocking function __led_set_brightness() changes in v2: - use devm_regulator_get_optional() to avoid using the dummy regulator and do some unnecessary work Jean-Jacques Hiblot (3): led: make led_set_brightness_sync() use led_set_brightness_nosleep() dt-bindings: leds: document the "power-supply" property leds: Add control of the voltage/current regulator to the LED core .../devicetree/bindings/leds/common.txt | 6 ++ drivers/leds/led-class.c | 17 ++++ drivers/leds/led-core.c | 77 +++++++++++++++++-- drivers/leds/leds.h | 3 + include/linux/leds.h | 5 ++ 5 files changed, 101 insertions(+), 7 deletions(-) -- 2.17.1
