On Wed 2018-08-08 16:41:16, Dan Murphy wrote: > On 08/08/2018 04:09 PM, Pavel Machek wrote: > > On Wed 2018-08-08 16:04:43, Dan Murphy wrote: > >> On 08/08/2018 04:02 PM, Pavel Machek wrote: > >>> Hi! > >>> > >>>>>> + - #size-cells : 0 > >>>>>> + - control-bank-cfg - : Indicates which sink is connected to which control bank > >>>>>> + 0 - All HVLED outputs are controlled by bank A > >>>>>> + 1 - HVLED1 is controlled bank B, HVLED2/3 are controlled by bank A > >>>>>> + 2 - HVLED2 is controlled bank B, HVLED1/3 are controlled by bank A > >>>>>> + 3 - HVLED1/2 are controlled by bank B, HVLED3 is controlled by bank A > >>>>>> + 4 - HVLED3 is controlled by bank B, HVLED1/2 are controlled by bank A > >>>>>> + 5 - HVLED1/3 is controlled by bank B, HVLED2 is controlled by bank A > >>>>>> + 6 - (default) HVLED1 is controlled by bank A, HVLED2/3 are controlled by bank B > >>>>>> + 7 - All HVLED outputs are controlled by bank B > >>>>> > >>>>> This is quite long way to describe a bitmask, no? Could we make > >>>>> it so that control-bank-cfg is not needed? > >>>> > >>>> The problem we have here is there is a potential to control > >>>> 3 different LED string but only 2 sinks. So control bank A can control 2 LED strings and control > >>>> bank b can control 1 LED string. > >>>> > >>> > >>> Can we forget about the LED strings, and just expose the sinks as > >>> Linux LED devices? > >> > >> 2 sinks 3 LED strings. How do you know which LED string is which and what bank it belongs > >> to when setting the brightness. Each Bank has a separate register for brightness control. > > > > Yes, and LED strings are statically assigned to banks, right? > > > > So why not simply forget about LED strings for sake of hw > > abstractions, and work just with banks? > > How would you set the control bank register for the correct LED string configuration? Have property at each LED saying which which HVLEDs it controls? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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