linux-kernel - Re: [PATCH v2 -next] soc: mediatek: SVS: Use the new PM macros

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Date:   Thu, 7 Jul 2022 10:26:52 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Jin Xiaoyun <jinxiaoyun2@...wei.com>,
        angelogioacchino.delregno@...labora.com, khilman@...libre.com,
        zhengbin13@...wei.com, gaochao49@...wei.com
Cc:     linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 -next] soc: mediatek: SVS: Use the new PM macros



On 23/06/2022 14:03, Matthias Brugger wrote:
> 
> 
> On 23/06/2022 13:59, Matthias Brugger wrote:
>>
>>
>> On 23/06/2022 05:09, Jin Xiaoyun wrote:
>>> Use DEFINE_SIMPLE_DEV_PM_OPS() instead of the SIMPLE_DEV_PM_OPS()
>>> macro, along with using pm_sleep_ptr() as this driver doesn't handle
>>> runtime PM.
>>>
>>> Fix build error:
>>> drivers/soc/mediatek/mtk-svs.c:1515:12: error: ‘svs_resume’ defined but not 
>>> used [-Werror=unused-function]
>>> drivers/soc/mediatek/mtk-svs.c:1481:12: error: ‘svs_suspend’ defined but not 
>>> used [-Werror=unused-function]
>>>
>>> Signed-off-by: Jin Xiaoyun <jinxiaoyun2@...wei.com>
>>> Reviewed-by: Matthias Brugger <matthias.bgg@...il.com>
> 
> I never did give my Reviewed-by for that. Please only add these tags if you got 
> it explicetely.
> 
> Regards,
> Matthias
> 
>>> ---
>>> v1->v2:
>>> - Remove the #ifdef CONFIG_PM guard around the suspend/resume functions
>>> - Use DEFINE_SIMPLE_DEV_PM_OPS along with using pm_sleep_ptr()
>>> ---
>>>   drivers/soc/mediatek/mtk-svs.c | 4 ++--
>>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
>>> index 606a00a2e57d..fae7376bd083 100644
>>> --- a/drivers/soc/mediatek/mtk-svs.c
>>> +++ b/drivers/soc/mediatek/mtk-svs.c
>>> @@ -2381,13 +2381,13 @@ static int svs_probe(struct platform_device *pdev)
>>>       return ret;
>>>   }
>>>
>>> -static SIMPLE_DEV_PM_OPS(svs_pm_ops, svs_suspend, svs_resume);
>>> +static DEFINE_SIMPLE_DEV_PM_OPS(svs_pm_ops, svs_suspend, svs_resume);
>>>
>>>   static struct platform_driver svs_driver = {
>>>       .probe    = svs_probe,
>>>       .driver    = {
>>>           .name        = "mtk-svs",
>>> -        .pm        = &svs_pm_ops,
>>> +        .pm        = pm_sleep_ptr(&svs_pm_ops),
>>
>> Why do we need that? From my understanding DEFINE_SIMPLE_DEV_PM_OPS() sets 
>> runtime_suspend_fn, runtime_resume_fn and idle_fn to NULL.
>>

As I didn't see any response from you on that, I went ahead and applied
20220622175649.1856337-1-nathan@...nel.org

Regards,
Matthias

>> Regards,
>> Matthias
>>
>>>           .of_match_table    = of_match_ptr(svs_of_match),
>>>       },
>>>   };
>>> -- 
>>> 2.25.1
>>>