linux-kernel - Re: [PATCH v2] clk: qcom: gcc-sc8280xp: Allow PCIe GDSCs to enter retention state

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Date:   Thu, 6 Jul 2023 19:55:18 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Johan Hovold <johan@...nel.org>
Cc:     andersson@...nel.org, mturquette@...libre.com, sboyd@...nel.org,
        konrad.dybcio@...aro.org, johan+linaro@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] clk: qcom: gcc-sc8280xp: Allow PCIe GDSCs to enter
 retention state

On Thu, Jul 06, 2023 at 04:17:06PM +0200, Johan Hovold wrote:
> On Thu, Jul 06, 2023 at 07:38:42PM +0530, Manivannan Sadhasivam wrote:
> > With the minimal system suspend support in place for the PCIe driver that
> > keeps the interconnect path voted, the ALWAYS_ON flag can now be dropped.
> > 
> > Also, the PWRSTS_RET_ON flag should be used to allow the GDSCs to enter the
> > retention state when the parent domain get's turned off during system
> > suspend.
> > 
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > ---
> > 
> > Changes in v2:
> > 
> > * Changed the patch from simple revert to changing the ALWAYS_ON flag to
> >   PWRSTS_RET_ON.
> > 
> >  drivers/clk/qcom/gcc-sc8280xp.c | 10 +++++-----
> >  1 file changed, 5 insertions(+), 5 deletions(-)
> > 
> > diff --git a/drivers/clk/qcom/gcc-sc8280xp.c b/drivers/clk/qcom/gcc-sc8280xp.c
> > index 04a99dbaa57e..c59b0f91c87d 100644
> > --- a/drivers/clk/qcom/gcc-sc8280xp.c
> > +++ b/drivers/clk/qcom/gcc-sc8280xp.c
> > @@ -6786,7 +6786,7 @@ static struct gdsc pcie_2a_gdsc = {
> >  		.name = "pcie_2a_gdsc",
> >  	},
> >  	.pwrsts = PWRSTS_OFF_ON,
> > -	.flags = VOTABLE | ALWAYS_ON,
> > +	.flags = VOTABLE | PWRSTS_RET_ON,
> >  };
> 
> This is not correct either. PWRSTS_RET_ON is a pwrsts mask...
> 

I should stop sending patches while feeling sleepy...

- Mani

> Johan

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