led-trigger: Allow multiple led triggers of the same type ...

We used to have a static array of trigger types which, allows only one led
per trigger. While this is enough for panic and heartbeat, it falls short when
multiple leds are associated to the default-on trigger. The default-on trigger
is used to turn on a led statically from devicetree and may be used multiple
times.
This patch reworks the led triggers so that a trigger struct is allocated
dynamically when needed and put onto a list.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

led: add blinking/flashing and led_blink_pattern interface ...

So far blinking/flashing LEDs is only supported on led-trigger level.
Even without triggers it useful to be able to blink/flash LEDs, so
add this functionality to the LED core.

A led_blink_pattern consists of a number of on and off-periods which
are described in an array. Using such an array you can encode nearly
every blink pattern you need.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

led: add missing includes ...

The led header use some parts which are missing when include the this
header. This patch adds them.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

led: Fix led_gpio_rgb_unregister prototype ...

Analog to the other led_unregister prototypes this must take
the LED type specific struct.

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

led: Add default-on trigger ...

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

led: move led_of_parse_trigger to core ...

So that other LED drivers can use it.

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>

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>