Re: "advanced" LED controllers

[Alexandre Courbot]

On Mon, Mar 2, 2015 at 6:21 PM, Pavel Machek <pavel@xxxxxx> wrote:
> On Wed 2015-02-25 18:06:07, Alexandre Courbot wrote:
>> On Wed, Feb 25, 2015 at 5:25 PM, Geert Uytterhoeven
>> <geert@xxxxxxxxxxxxxx> wrote:
>> > CC linux-gpio, as this looks like the LED equivalent of bulk gpio?
>>
>> Indeed. The LED core could implement something similar to
>> gpiod_set_array() to allow several LEDs to be set in one call. If the
>> controller supports it, it would then set all the LEDs at once,
>> otherwise the core would apply the values serially.
>>
>> In leds-gpio.c, this multiple LED setting could be implemented by a
>> single call to gpiod_set_array() and the right thing would happen.
>
> Actually, there are two issues: some controlles can set all LEDs at
> once, and some can program pwm level smoothly using given program (and
> handle multiple leds in the process).

In any case, that would be handled at the controller level and should
work with a function similar to gpiod_set_array(), wouldn't it?
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