linux-kernel - Re: [PATCH 2/9] dt-bindings: mmc: sprd: Add another optional clock documentation

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Message-ID: <CAPDyKFrWiG3KJad+L3NOQ-dC2XnBM-8mQGVEsVB_Qg0ACTfVag@mail.gmail.com>
Date:   Mon, 3 Jun 2019 15:34:10 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Baolin Wang <baolin.wang@...aro.org>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Orson Zhai <orsonzhai@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
        Vincent Guittot <vincent.guittot@...aro.org>, arm@...nel.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>
Subject: Re: [PATCH 2/9] dt-bindings: mmc: sprd: Add another optional clock documentation

On Mon, 20 May 2019 at 12:12, Baolin Wang <baolin.wang@...aro.org> wrote:
>
> For some Spreadtrum platforms like SC9860 platform, we should enable another
> gate clock '2x_enable' to make the SD host controller work well. Thus add
> documentation for this optional clock.
>
> Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
> ---
>  .../devicetree/bindings/mmc/sdhci-sprd.txt         |    1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/Documentation/devicetree/bindings/mmc/sdhci-sprd.txt b/Documentation/devicetree/bindings/mmc/sdhci-sprd.txt
> index 45c9978..a285c77 100644
> --- a/Documentation/devicetree/bindings/mmc/sdhci-sprd.txt
> +++ b/Documentation/devicetree/bindings/mmc/sdhci-sprd.txt
> @@ -14,6 +14,7 @@ Required properties:
>  - clock-names: Should contain the following:
>         "sdio" - SDIO source clock (required)
>         "enable" - gate clock which used for enabling/disabling the device (required)
> +       "2x_enable" - gate clock controlling the device for some special platforms (optional)

This is a bit vague, could you please elaborate (and fold in that
information to the doc) on what kind of clock this is?

[...]

Kind regards
Uffe