linux-kernel - Re: [PATCH v10 1/3] dt-bindings: mmc: mtk-sd: extend interrupts and pinctrls properties

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Date:   Thu, 19 May 2022 13:18:35 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Axe Yang <axe.yang@...iatek.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>
Cc:     Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Satya Tangirala <satyat@...gle.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Lucas Stach <dev@...xeye.de>,
        Eric Biggers <ebiggers@...gle.com>,
        Andrew Jeffery <andrew@...id.au>,
        Stephen Boyd <swboyd@...omium.org>,
        Kiwoong Kim <kwmad.kim@...sung.com>,
        Yue Hu <huyue2@...ong.com>, Tian Tao <tiantao6@...ilicon.com>,
        linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v10 1/3] dt-bindings: mmc: mtk-sd: extend interrupts and
 pinctrls properties

Il 19/05/22 13:13, Axe Yang ha scritto:
> Extend interrupts and pinctrls for SDIO wakeup interrupt feature.
> This feature allow SDIO devices alarm asynchronous interrupt to host
> even when host stop providing clock to SDIO card. An extra wakeup
> interrupt and pinctrl states for SDIO DAT1 pin state switching are
> required in this scenario.
> 
> Signed-off-by: Axe Yang <axe.yang@...iatek.com>
> ---
>   .../devicetree/bindings/mmc/mtk-sd.yaml       | 53 ++++++++++++++++++-
>   1 file changed, 52 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> index 2a2e9fa8c188..b068ab67a054 100644
> --- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> @@ -72,12 +72,26 @@ properties:
>         - const: ahb_cg
>   
>     interrupts:
> -    maxItems: 1
> +    description:
> +      Should at least contain MSDC GIC interrupt. To support SDIO in-band wakeup, an extended
> +      interrupt is required and be configured as wakeup source irq.
> +    minItems: 1
> +    maxItems: 2
> +
> +  interrupt-names:
> +    items:
> +      - const: msdc_irq
>   

That ain't right. You have two interrupts, so you describe two interrupts:

interrupt-names:
   minItems: 1
   items:
     - const: msdc
     - const: sdio-wakeup

...also, I personally don't like the "_irq" suffix: we're specifying interrupts in
interrupt-names, so it sounds a bit redundant.

You're free to keep it, if you really like it though.

Regards,
Angelo