linux-kernel - Re: [PATCH v1 1/1] mmc: sdhci-of-arasan: Specify .clk

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Message-ID: <CAPDyKFp1nR_Qx5p+ou1cZns9MvLVWD5bTuFCkMpu_EbHxh1Opw@mail.gmail.com>
Date:   Tue, 17 Nov 2020 18:14:29 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     "Zulkifli, Muhammad Husaini" <muhammad.husaini.zulkifli@...el.com>
Cc:     "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Hunter, Adrian" <adrian.hunter@...el.com>,
        "Raja Subramanian, Lakshmi Bai" 
        <lakshmi.bai.raja.subramanian@...el.com>,
        "Wan Mohamad, Wan Ahmad Zainie" 
        <wan.ahmad.zainie.wan.mohamad@...el.com>,
        "David E. Box" <david.e.box@...ux.intel.com>
Subject: Re: [PATCH v1 1/1] mmc: sdhci-of-arasan: Specify .clk_ops for Keem
 Bay SOC

On Tue, 17 Nov 2020 at 14:46, Zulkifli, Muhammad Husaini
<muhammad.husaini.zulkifli@...el.com> wrote:
>
> Hi Ulf,
>
> >-----Original Message-----
> >From: Ulf Hansson <ulf.hansson@...aro.org>
> >Sent: Tuesday, November 17, 2020 7:27 PM
> >To: Zulkifli, Muhammad Husaini <muhammad.husaini.zulkifli@...el.com>
> >Cc: linux-mmc@...r.kernel.org; Linux ARM <linux-arm-
> >kernel@...ts.infradead.org>; Linux Kernel Mailing List <linux-
> >kernel@...r.kernel.org>; Hunter, Adrian <adrian.hunter@...el.com>; Raja
> >Subramanian, Lakshmi Bai <lakshmi.bai.raja.subramanian@...el.com>; Wan
> >Mohamad, Wan Ahmad Zainie
> ><wan.ahmad.zainie.wan.mohamad@...el.com>; David E. Box
> ><david.e.box@...ux.intel.com>
> >Subject: Re: [PATCH v1 1/1] mmc: sdhci-of-arasan: Specify .clk_ops for Keem Bay
> >SOC
> >
> >On Mon, 16 Nov 2020 at 15:22, Zulkifli, Muhammad Husaini
> ><muhammad.husaini.zulkifli@...el.com> wrote:
> >>
> >> Hi Ulf,
> >>
> >> Thanks for your review comments. I replied inline
> >>
> >> >-----Original Message-----
> >> >From: Ulf Hansson <ulf.hansson@...aro.org>
> >> >Sent: Monday, November 16, 2020 7:41 PM
> >> >To: Zulkifli, Muhammad Husaini <muhammad.husaini.zulkifli@...el.com>
> >> >Cc: linux-mmc@...r.kernel.org; Linux ARM <linux-arm-
> >> >kernel@...ts.infradead.org>; Linux Kernel Mailing List <linux-
> >> >kernel@...r.kernel.org>; Hunter, Adrian <adrian.hunter@...el.com>;
> >> >Raja Subramanian, Lakshmi Bai
> >> ><lakshmi.bai.raja.subramanian@...el.com>; Wan Mohamad, Wan Ahmad
> >> >Zainie <wan.ahmad.zainie.wan.mohamad@...el.com>; David E. Box
> >> ><david.e.box@...ux.intel.com>
> >> >Subject: Re: [PATCH v1 1/1] mmc: sdhci-of-arasan: Specify .clk_ops
> >> >for Keem Bay SOC
> >> >
> >> >On Fri, 6 Nov 2020 at 05:10, <muhammad.husaini.zulkifli@...el.com> wrote:
> >> >>
> >> >> From: Muhammad Husaini Zulkifli
> >> >> <muhammad.husaini.zulkifli@...el.com>
> >> >>
> >> >> Commit 16ada730a759 ("mmc: sdhci-of-arasan: Modify clock operations
> >> >> handling") introduces platform specific SDHCI clock operation.
> >> >>
> >> >> This patch declares the clock operation for Keem Bay.
> >> >> Add clk_ops for SD, EMMC and SDIO operations.
> >> >
> >> >The above commit message doesn't really tell why or what goes on here.
> >> >Can please try to clarify that.
> >>
> >> We missed out the clock operation handling patch (Commit 16ada730a759)
> >> and did not handle the clk_ops  for Keem Bay SOC devices.
> >> These 2 patches (Commit 16ada730a759) and (Commit 36c6aadaae86)  are
> >merged at around the same time.
> >> We catch the issue later when trying to boot into v5.10-rc1 with Keem Bay
> >EVM.
> >> That is why I created this patch to handle the clk_ops for Keem Bay devices.
> >
> >Alright, so the previous changes were simply not sufficient to complete the
> >support.
> >
> >>
> >> >
> >> >>
> >> >> Fixes: 36c6aadaae86 ("mmc: sdhci-of-arasan: Add support for Intel
> >> >> Keem
> >> >> Bay")
> >> >
> >> >Is $subject patch fixing a bug/regression?
> >>
> >> This is to fix issue on previous commit. It is a bug fix.
> >
> >Has it ever worked?
>
> Yes it is working. Tested with Keem Bay EVM.
> SD/EMMC/SDIO devices registered successfully with this fix.

I am not asking if $subject patch makes it work, I understand that it does.

>
> >
> >Did the commit you point to with the fixes tag, break some other existing
> >functionality?
>
> It should not break other existing functionality.
> This is specific for Keem Bay SOC only.

So, you are saying that it has never worked for Keem Bay? But $subject
patch makes it work?

Can you please re-spin and update the commit message to better reflect
what goes on, then I can apply.

Kind regards
Uffe