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? Dan > Pavel > -- ------------------ Dan Murphy
