On Mon, Aug 24, 2020 at 10:31:31AM +0000, Bough Chen wrote: > > -----Original Message----- > > From: Dong Aisheng [mailto:dongas86@xxxxxxxxx] > > Sent: 2020年8月24日 17:45 > > To: Krzysztof Kozlowski <krzk@xxxxxxxxxx> > > Cc: Aisheng Dong <aisheng.dong@xxxxxxx>; devicetree@xxxxxxxxxxxxxxx; > > linux-serial@xxxxxxxxxxxxxxx; Anson Huang <anson.huang@xxxxxxx>; > > linux-gpio@xxxxxxxxxxxxxxx; Fabio Estevam <festevam@xxxxxxxxx>; Linus > > Walleij <linus.walleij@xxxxxxxxxx>; linux-pm@xxxxxxxxxxxxxxx; > > linux-mmc@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > > linux-pwm@xxxxxxxxxxxxxxx; Bartosz Golaszewski > > <bgolaszewski@xxxxxxxxxxxx>; Rob Herring <robh+dt@xxxxxxxxxx>; > > linux-mtd@xxxxxxxxxxxxxxxxxxx; dl-linux-imx <linux-imx@xxxxxxx>; Pengutronix > > Kernel Team <kernel@xxxxxxxxxxxxxx>; Thierry Reding > > <thierry.reding@xxxxxxxxx>; Shawn Guo <shawnguo@xxxxxxxxxx>; Sascha > > Hauer <s.hauer@xxxxxxxxxxxxxx>; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; > > linux-watchdog@xxxxxxxxxxxxxxx; Bough Chen <haibo.chen@xxxxxxx> > > 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@xxxxxxxxxx> > > wrote: > > > > > > On Mon, Aug 24, 2020 at 09:00:19AM +0000, Aisheng Dong wrote: > > > > > From: Krzysztof Kozlowski <krzk@xxxxxxxxxx> > > > > > 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@5b010000: > > > > > 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@5b010000: > > > > > compatible: Additional items are not allowed > > > > > ('fsl,imx7d-usdhc' was > > > > > unexpected) > > > > > > > > > > Signed-off-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx> > > > > > > > > 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. > > Yes, usdhc of imx8qxp can work by using the compatible "fsl, imx7d-usdhc", but will not support HS400ES/Command Queue any more. Also imx8qxp support Auto CMD23, but imx7d not. > And imx8qxp need to re-config the clock rate after system PM, imx7d do not need to do this. Then we can leave the compatible in DTS and I will correct the device tree schema. Best regards, Krzysztof
