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drivers: led: lp5569: implement write_channels api

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The lp5569 has multiple pwm outputs, and thus implementing the
write_channels api to set multiple values in a single call makes sense.

Implement the write_channels function with a basic range check on the
channel range.
Since the lp5569 supports auto-increment, all of the channels can be
written in one i2c transfer, starting from the pwm register of the
start_channel.

Signed-off-by: Emil Dahl Juhl <emdj@bang-olufsen.dk>
This commit is contained in:
Emil Dahl Juhl 2024-11-17 21:32:20 +01:00 • committed by Benjamin Cabé
commit d6ac9e8424
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doc/releases/release-notes-4.1.rst
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@ -141,6 +141,7 @@ Drivers and Sensors
* Added a new set of devicetree based LED APIs, see :c:struct:`led_dt_spec`.
* lp5569: added use of auto-increment functionality.
* lp5569: implemented ``write_channels`` api.
* LED Strip