Re: [PATCH] leds: gpio: support multi-level brightness

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2019年10月5日(土) 6:17 Jacek Anaszewski <jacek.anaszewski@xxxxxxxxx>:
>
> Hi Akinobu,
>
> Why do you think this change is needed? Does it solve
> some use case for you?

It can be useful when using with an LED trigger that could set the
brightness values other than LED_FULL or LED_OFF.

The LED CPU trigger for all CPUs (not per CPU) sets the brightness value
depending on the number of active CPUs.  We can define the multi brightness
level gpio LED with fewer number of GPIO LEDs than the total number of
CPUs, and the LEDs can be viewed as a level meter.




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