Re: [PATCH 0/7] ARM: davinci: add genpd support

[Sekhar Nori]

Hi David,

On Thursday 08 February 2018 04:13 AM, David Lechner wrote:
> On 02/07/2018 07:45 AM, Bartosz Golaszewski wrote:
>> From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
>>
>> Hi Sekhar et al,
>>
>> please take a look at the following patches. They add a simple genpd
>> driver and use it in DT mode on da850 boards.
>>
>> I was trying to use genpd in legacy mode too, but couldn't find neither
>> any interfaces nor users that would do that. For now I added a check in
>> arch/arm/mach-davinci/pm_domain.c that disables the clock pm setup if
>> we're using genpd.
>>
>> This series applies on top of and has been tested with David Lechner's
>> for-bartosz branch. It fixes the clock look-up issues we faced with
>> lcdc and emac.
> 
> I'm starting to think that it makes more sense to just make the PSC driver
> a power-domain and reset provider rather than a clock provider. It is
> unfortunate that genpd is DT only.

This will mean that the only way to enable clocks on DaVinci is to use
pm_runtime() calls. We do still have drivers which depend on clk api for
enabling clocks, so I am not sure its feasible just yet.

I think a question like this can arise for any gate clock.

Thanks,
Sekhar