led: test for led->set callback before calling it ...

Registering a LED can fail. If someone calls led_set for such
a LED no set function will be there. Fail gracefully in this
case.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

led-gpio: use gpio_request and gpio_free ...

So we can ensure a gpio is not used for something else

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

led-gpio: add bicolor led support ...

those led can have 2 colors but one at a time otherwise they are black

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Treewide: remove address of the Free Software Foundation ...

The FSF address has changed in the past. Instead of updating it
each time the address changes, just drop it completely treewide.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

led: remove gpio include ...

The LED core itself does not need gpio support, so remove include
so that it compiles on architectures without gpio support.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

LED: Add LED trigger support ...

This patch allows to associate LEDs with certain triggers, such
as heartbeat or network activity.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

LED: Add gpio LED support ...

This patch adds support for registering gpios as LEDs.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

basic LED support ...

This patch adds core functionality for controlling LEDs.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>