linux-kernel - [PATCH V3 1/3] dt-bindings: mmc: imx-esdhc: Update compatible fallbacks

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Date:   Sat,  2 Apr 2022 14:39:39 -0500
From:   Adam Ford <aford173@...il.com>
To:     linux-mmc@...r.kernel.org
Cc:     haibo.chen@....com, aford@...conembedded.com,
        Adam Ford <aford173@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH V3 1/3] dt-bindings: mmc: imx-esdhc: Update compatible fallbacks

The SDHC controller in the imx8mn and imx8mp have the same controller
as the imx8mm which is slightly different than that of the imx7d.
Using the fallback of the imx8mm enables the controllers to support
HS400-ES which is not available on the imx7d. After discussion with NXP,
it turns out that the imx8qm should fall back to the imx8qxp, because
those have some additional flags not present in the imx8mm.

Suggested-by: haibo.chen@....com
Signed-off-by: Adam Ford <aford173@...il.com>
---
V3:  Marked the imx7d-usdhc as deprecated when there are better
     fallback options or the fallback isn't needed.
     Leave the deprecated fallback in the YAML to prevent errors
     Remove Reviewed-by from Krzysztof Kozlowski due to the above

V2:  Update the table per recomendation from Haibo.

diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
index 7dbbcae9485c..11f039320d79 100644
--- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
@@ -34,23 +34,34 @@ properties:
           - fsl,imx6ull-usdhc
           - fsl,imx7d-usdhc
           - fsl,imx7ulp-usdhc
+          - fsl,imx8mm-usdhc
+          - fsl,imx8qxp-usdhc
           - fsl,imxrt1050-usdhc
           - nxp,s32g2-usdhc
       - items:
           - enum:
               - fsl,imx8mm-usdhc
+              - fsl,imx8mq-usdhc
+            # fsl,imx7d-usdhc fallback is deprecated for imx8mm-usdhc
+          - const: fsl,imx7d-usdhc
+      - items:
+          - enum:
               - fsl,imx8mn-usdhc
               - fsl,imx8mp-usdhc
-              - fsl,imx8mq-usdhc
-              - fsl,imx8qm-usdhc
-              - fsl,imx8qxp-usdhc
+          - const: fsl,imx8mm-usdhc
+            # fsl,imx7d-usdhc fallback is deprecated
           - const: fsl,imx7d-usdhc
       - items:
           - enum:
-              - fsl,imx93-usdhc
               - fsl,imx8ulp-usdhc
+              - fsl,imx93-usdhc
           - const: fsl,imx8mm-usdhc
-
+      - items:
+          - enum:
+              - fsl,imx8qm-usdhc
+          - const: fsl,imx8qxp-usdhc
+            # fsl,imx7d-usdhc fallback is deprecated
+          - const: fsl,imx7d-usdhc
   reg:
     maxItems: 1
 
-- 
2.34.1