[PATCH 1/2] pwm: mediatek: Add support for MT7986

[Sam Shih (史碩三)]

Hi Uwe,

Sorry for the late reply.

Since the CK_26M_SEL register does exist on MT7986, and for the other
mediatek SoCs, we should update the value of the CK_26M_SEL register if
it exists on the SoC, even the MT7986's PWM hardware just bypasses this
setting.

From this point of view, I think it is fine to mark  '.has_ck_26m_sel'
attribute to 'true'.


For this patch:

Reviewed-by: Sam Shih <sam.shih at mediatek.com>



Thanks,
Best Regards,
Sam Shih


On Thu, 2022-11-17 at 12:56 +0100, Uwe Kleine-König wrote:
> On Tue, Oct 25, 2022 at 02:35:43PM +0800, Sam Shih wrote:
> > Hi Daniel:
> > 
> > On Fri, 2022-10-21 at 16:24 +0100, Daniel Golle wrote:
> > > Add support for PWM on MT7986 which has 2 PWM channels, one of
> > > them
> > > is
> > > typically used for a temperature controlled fan.
> > > 
> > > Signed-off-by: Daniel Golle <daniel at makrotopia.org>
> > > ---
> > >  drivers/pwm/pwm-mediatek.c | 7 +++++++
> > >  1 file changed, 7 insertions(+)
> > > 
> > > diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-
> > > mediatek.c
> > > index 6901a44dc428de..2219cba033e348 100644
> > > --- a/drivers/pwm/pwm-mediatek.c
> > > +++ b/drivers/pwm/pwm-mediatek.c
> > > @@ -329,6 +329,12 @@ static const struct pwm_mediatek_of_data
> > > mt8365_pwm_data = {
> > >  	.has_ck_26m_sel = true,
> > >  };
> > >  
> > > +static const struct pwm_mediatek_of_data mt7986_pwm_data = {
> > > +	.num_pwms = 2,
> > > +	.pwm45_fixup = false,
> > > +	.has_ck_26m_sel = true,
> > 
> > For MT7986 SoC, I think the value of "has_ck_26m_sel" should be
> > 'false' 
> 
> The status of the discussion isn't clear to me. You didn't visibly
> agree
> which value is right now. Will there be a v2 of this patch? Or is it
> expected to be picked up as is.
> 
> From my side (i.e. not having checked the hw details just judging
> with
> the PWM hat on) the patch is fine.
> 
> Best regards
> Uwe
>