linux-kernel - Re: [PATCH 21/22] arm64: dts: imx8qxp: Remove i.MX7 compatible from USDHC

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Date:   Mon, 24 Aug 2020 17:45:19 +0800
From:   Dong Aisheng <dongas86@...il.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Aisheng Dong <aisheng.dong@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        Anson Huang <anson.huang@....com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        Fabio Estevam <festevam@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pwm@...r.kernel.org" <linux-pwm@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        dl-linux-imx <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Thierry Reding <thierry.reding@...il.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-watchdog@...r.kernel.org" <linux-watchdog@...r.kernel.org>,
        Haibo Chen <haibo.chen@....com>
Subject: Re: [PATCH 21/22] arm64: dts: imx8qxp: Remove i.MX7 compatible from USDHC

On Mon, Aug 24, 2020 at 5:15 PM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On Mon, Aug 24, 2020 at 09:00:19AM +0000, Aisheng Dong wrote:
> > > From: Krzysztof Kozlowski <krzk@...nel.org>
> > > Sent: Monday, August 24, 2020 12:16 AM
> > >
> > > The USDHC on i.MX 8QXP has its own compatible described in bindings and
> > > used in the driver (with its own quirks).  Remove additional fsl,imx7d-usdhc
> > > compatible to fix dtbs_check warnings like:
> > >
> > >   arch/arm64/boot/dts/freescale/imx8qxp-ai_ml.dt.yaml: mmc@...10000:
> > >     compatible: ['fsl,imx8qxp-usdhc', 'fsl,imx7d-usdhc'] is too long
> > >     From schema:
> > > /ocumentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
> > >
> > >   arch/arm64/boot/dts/freescale/imx8qxp-ai_ml.dt.yaml: mmc@...10000:
> > >     compatible: Additional items are not allowed ('fsl,imx7d-usdhc' was
> > > unexpected)
> > >
> > > Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> >
> > For Patch 19-22, I think we should fix dt binding doc.
>
> Are you sure that these USDHC controllers are compatible with i.MX 7D?
> Could they really run with fsl,imx7d-usdhc compatible?

AFAIK uSDHC on QXP is derived from the former platforms with adding a few
more new features. e.g. HS400ES/CMDQ.
Let me loop in uSDHC driver owner Haibo Chen to double confirm.

Regards
Aisheng

> The implementation (Linux kernel driver) is different, I guess on
> purpose...
>
> Best regards,
> Krzysztof
>
> >
> > Regards
> > Aisheng
> >
> > > ---
> > >  arch/arm64/boot/dts/freescale/imx8qxp.dtsi | 6 +++---
> > >  1 file changed, 3 insertions(+), 3 deletions(-)
> > >
> > > diff --git a/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> > > b/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> > > index 61bccb69f09e..26c4fcdfe290 100644
> > > --- a/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> > > +++ b/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> > > @@ -362,7 +362,7 @@
> > >             };
> > >
> > >             usdhc1: mmc@...10000 {
> > > -                   compatible = "fsl,imx8qxp-usdhc", "fsl,imx7d-usdhc";
> > > +                   compatible = "fsl,imx8qxp-usdhc";
> > >                     interrupts = <GIC_SPI 232 IRQ_TYPE_LEVEL_HIGH>;
> > >                     reg = <0x5b010000 0x10000>;
> > >                     clocks = <&conn_lpcg IMX_CONN_LPCG_SDHC0_IPG_CLK>, @@
> > > -374,7 +374,7 @@
> > >             };
> > >
> > >             usdhc2: mmc@...20000 {
> > > -                   compatible = "fsl,imx8qxp-usdhc", "fsl,imx7d-usdhc";
> > > +                   compatible = "fsl,imx8qxp-usdhc";
> > >                     interrupts = <GIC_SPI 233 IRQ_TYPE_LEVEL_HIGH>;
> > >                     reg = <0x5b020000 0x10000>;
> > >                     clocks = <&conn_lpcg IMX_CONN_LPCG_SDHC1_IPG_CLK>, @@
> > > -388,7 +388,7 @@
> > >             };
> > >
> > >             usdhc3: mmc@...30000 {
> > > -                   compatible = "fsl,imx8qxp-usdhc", "fsl,imx7d-usdhc";
> > > +                   compatible = "fsl,imx8qxp-usdhc";
> > >                     interrupts = <GIC_SPI 234 IRQ_TYPE_LEVEL_HIGH>;
> > >                     reg = <0x5b030000 0x10000>;
> > >                     clocks = <&conn_lpcg IMX_CONN_LPCG_SDHC2_IPG_CLK>,
> > > --
> > > 2.17.1
> >
>
> _______________________________________________
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> linux-arm-kernel@...ts.infradead.org
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