leds: core: Add led_mc_set_brightness() function

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Add a new led_mc_set_brightness() function for in kernel color/brightness
changing of multi-color LEDs.

led-class-multicolor can be build as a module and led_mc_set_brightness()
will have the builtin callers, so put led_mc_set_brightness() inside
led-core instead, just like how led_set_brightness() is part of the core
and not of the led-class object.

This also adds a new LED_MULTI_COLOR led_classdev flag to allow
led_mc_set_brightness() to verify that it is operating on a multi-color
LED classdev, avoiding casting the passed in LED classdev to a multi-color
LED classdev, when it actually is not a multi-color LED.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/20240531114124.45346-5-hdegoede@redhat.com
Signed-off-by: Lee Jones <lee@kernel.org>

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Hans de Goede 2024-05-31 13:41:22 +02:00 • committed by Lee Jones

parent e1b08c6f5b

commit 5607ca92e6

3 changed files with 52 additions and 0 deletions

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1

drivers/leds/led-class-multicolor.c

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31

drivers/leds/led-core.c

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20

include/linux/leds.h

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