linux-kernel - Re: [PATCH] clk: qcom: gdsc: Add support to poll CFG register to check GDSC state

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Date:   Tue, 1 May 2018 10:32:54 +0530
From:   Taniya Das <tdas@...eaurora.org>
To:     Doug Anderson <dianders@...omium.org>
Cc:     Stephen Boyd <sboyd@...eaurora.org>,
        Michael Turquette <mturquette@...libre.com>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Odelu Kukatla <okukatla@...eaurora.org>,
        Amit Nischal <anischal@...eaurora.org>,
        linux-arm-msm@...r.kernel.org,
        "open list:ARM/QUALCOMM SUPPORT" <linux-soc@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] clk: qcom: gdsc: Add support to poll CFG register to
 check GDSC state

Hello Doug,

Thanks for the comments, I have based my latest patch on top of the 
earlier patches (clk-qcom-sdm845 branch of clk-next).

On 5/1/2018 12:12 AM, Doug Anderson wrote:
> Hi,
> 
> On Fri, Apr 27, 2018 at 1:19 AM, Taniya Das <tdas@...eaurora.org> wrote:
> 
>> -static int gdsc_is_enabled(struct gdsc *sc, unsigned int reg)
>> +static int gdsc_is_enabled(struct gdsc *sc, bool en)
>>   {
>> +       unsigned int reg;
>>          u32 val;
>>          int ret;
>>
>> +       if (sc->flags & POLL_CFG_GDSCR)
>> +               reg = sc->gdscr + CFG_GDSCR_OFFSET;
>> +       else
>> +               reg = sc->gds_hw_ctrl ?  sc->gds_hw_ctrl : sc->gdscr;
> 
> nit: why two spaces after the "?" in this new patch?  Should be just one.
> 
> 
>> diff --git a/drivers/clk/qcom/gdsc.h b/drivers/clk/qcom/gdsc.h
>> index 3964834..ac5f844 100644
>> --- a/drivers/clk/qcom/gdsc.h
>> +++ b/drivers/clk/qcom/gdsc.h
>> @@ -53,6 +53,7 @@ struct gdsc {
>>   #define VOTABLE                BIT(0)
>>   #define CLAMP_IO       BIT(1)
>>   #define HW_CTRL                BIT(2)
>> +#define POLL_CFG_GDSCR  BIT(5)
> 
> This doesn't apply cleanly to clk-next because clk-next already has
> the old patch #1 and patch #2 from your series.  You should have
> applied your patch to clk-next before sending out.
> 
> Also a nit here is that you have two spaces before "BIT(5)" but all
> other entries in this list have a tab before them.  You should be
> consistent and use a tab.
> 
> 
> In general I'd tend to assume that Stephen could handle this small
> merge conflict and fixing the whitespace issues when applying, but if
> he tells you to spin then you certainly should.  I'll also say that
> I'm nowhere near an expert on gdsc but it looks like Stephen's
> previous comments were addressed and the patch seems sane in general.
> Stephen: feel free to add my Reviewed-by: if you wish when applying
> (or Taniya, if you end up spinning).
> 
> 
> -Doug
> 

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