linux-kernel - Re: [PATCH V2 4/4] clk: qcom: videocc-sm8150: Add runtime PM support

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Date:   Fri, 24 Nov 2023 17:04:28 +0530
From:   "Satya Priya Kakitapalli (Temp)" <quic_skakitap@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
CC:     <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: Re: [PATCH V2 4/4] clk: qcom: videocc-sm8150: Add runtime PM support


On 11/23/2023 1:31 AM, Konrad Dybcio wrote:
>
>
> On 11/18/23 13:39, Satya Priya Kakitapalli wrote:
>> Add runtime PM support to ensure the supply rails are enabled
>> when necessary.
>>
>> Signed-off-by: Satya Priya Kakitapalli <quic_skakitap@...cinc.com>
>> ---
>> Changes since v1:
>>   - None.
>>
>>   drivers/clk/qcom/videocc-sm8150.c | 20 ++++++++++++++++++--
>>   1 file changed, 18 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/clk/qcom/videocc-sm8150.c 
>> b/drivers/clk/qcom/videocc-sm8150.c
>> index 52a9a453a143..b57df5ff96c4 100644
>> --- a/drivers/clk/qcom/videocc-sm8150.c
>> +++ b/drivers/clk/qcom/videocc-sm8150.c
>> @@ -6,6 +6,7 @@
>>   #include <linux/clk-provider.h>
>>   #include <linux/module.h>
>>   #include <linux/platform_device.h>
>> +#include <linux/pm_runtime.h>
>>   #include <linux/regmap.h>
>>     #include <dt-bindings/clock/qcom,videocc-sm8150.h>
>> @@ -240,17 +241,32 @@ MODULE_DEVICE_TABLE(of, 
>> video_cc_sm8150_match_table);
>>   static int video_cc_sm8150_probe(struct platform_device *pdev)
>>   {
>>       struct regmap *regmap;
>> +    int ret;
>> +
>> +    ret = devm_pm_runtime_enable(&pdev->dev);
>> +    if (ret)
>> +        return ret;
>> +
>> +    ret = pm_runtime_resume_and_get(&pdev->dev);
>> +    if (ret)
>> +        return ret;
>>         regmap = qcom_cc_map(pdev, &video_cc_sm8150_desc);
>> -    if (IS_ERR(regmap))
>> +    if (IS_ERR(regmap)) {
>> +        pm_runtime_put(&pdev->dev);
> Shouldn't this be _sync?
>

Yes, will update it on v2


> Konrad