linux-kernel - Re: [PATCH v6 5/5] clk: qcom: Alwaya on pcie gdsc

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Message-ID: <3c582fa2-7596-df33-7f5d-62cf23061f21@quicinc.com>
Date:   Wed, 14 Sep 2022 07:17:54 +0530
From:   Krishna Chaitanya Chundru <quic_krichai@...cinc.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Rajendra Nayak <quic_rjendra@...cinc.com>
CC:     <helgaas@...nel.org>, <linux-pci@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <mka@...omium.org>, <quic_vbadigan@...cinc.com>,
        <quic_hemantk@...cinc.com>, <quic_nitegupt@...cinc.com>,
        <quic_skananth@...cinc.com>, <quic_ramkri@...cinc.com>,
        <swboyd@...omium.org>, <dmitry.baryshkov@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        "Andy Gross" <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        "open list:COMMON CLK FRAMEWORK" <linux-clk@...r.kernel.org>
Subject: Re: [PATCH v6 5/5] clk: qcom: Alwaya on pcie gdsc


On 9/13/2022 10:12 PM, Manivannan Sadhasivam wrote:
> On Tue, Sep 13, 2022 at 12:12:32PM +0530, Rajendra Nayak wrote:
>> On 9/12/2022 10:34 PM, Manivannan Sadhasivam wrote:
>>> + Rajendra
>>>
>>> On Fri, Sep 09, 2022 at 02:14:44PM +0530, Krishna chaitanya chundru wrote:
>>>> Make GDSC always on to ensure controller and its dependent clocks
>>>> won't go down during system suspend.
>>>>
>>> You need to mention the SoC name in subject, otherwise one cannot know for
>>> which platform this patch applies to.
>>>
>>>> Signed-off-by: Krishna chaitanya chundru <quic_krichai@...cinc.com>
>>>> ---
>>>>    drivers/clk/qcom/gcc-sc7280.c | 2 +-
>>>>    1 file changed, 1 insertion(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/clk/qcom/gcc-sc7280.c b/drivers/clk/qcom/gcc-sc7280.c
>>>> index 7ff64d4..2f781a2 100644
>>>> --- a/drivers/clk/qcom/gcc-sc7280.c
>>>> +++ b/drivers/clk/qcom/gcc-sc7280.c
>>>> @@ -3109,7 +3109,7 @@ static struct gdsc gcc_pcie_1_gdsc = {
>>>>    		.name = "gcc_pcie_1_gdsc",
>>>>    	},
>>>>    	.pwrsts = PWRSTS_OFF_ON,
>>>> -	.flags = VOTABLE,
>>>> +	.flags = ALWAYS_ON,
>>> Rajendra, should we also put PCIe GDSC into retention state as you have done for
>>> USB [1]?
>> Yes, it looks like we should handle this the same way as we did with usb.
> Okay, thanks for the confirmation.
>
>> Why are we removing the VOTABLE flag anyway?
> Yeah, I don't see a reason for doing that.
>
> Chaitanya, please follow the patch from Rajendra I mentioned above and adapt it
> for PCIe GDSC.
>
> Thanks,
> Mani
ok I will try to adapt that.
>>> Thanks,
>>> Mani
>>>
>>> [1] https://lore.kernel.org/all/20220901101756.28164-2-quic_rjendra@quicinc.com/
>>>
>>>>    };
>>>>    static struct gdsc gcc_ufs_phy_gdsc = {
>>>> -- 
>>>> 2.7.4
>>>>