The Canaan k230 uses the SDHCI from Synopsys. Add compatible strings
to the k230. The k230 has two controllers. MMC0 supports eMMC, while
MMC1 supports SDIO.

Signed-off-by: Jiayu Du <jiayu.riscv@isrc.iscas.ac.cn>
---
 .../bindings/mmc/snps,dwcmshc-sdhci.yaml      | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml b/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml
index 7e7c55dc2440..ae63363c0eae 100644
--- a/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml
+++ b/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml
@@ -23,6 +23,8 @@ properties:
           - const: sophgo,sg2044-dwcmshc
           - const: sophgo,sg2042-dwcmshc
       - enum:
+          - canaan,k230-emmc
+          - canaan,k230-sdio
           - rockchip,rk3568-dwcmshc
           - rockchip,rk3588-dwcmshc
           - snps,dwcmshc-sdhci
@@ -55,6 +57,11 @@ properties:
   reset-names:
     maxItems: 5
 
+  canaan,usb-phy:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: Phandle to the Canaan K230 USB PHY node required for
+                 k230-emmc/sdio.
+
   rockchip,txclk-tapnum:
     description: Specify the number of delay for tx sampling.
     $ref: /schemas/types.yaml#/definitions/uint8
@@ -87,6 +94,28 @@ required:
 allOf:
   - $ref: mmc-controller.yaml#
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - canaan,k230-emmc
+              - canaan,k230-sdio
+    then:
+      properties:
+        clocks:
+          minItems: 5
+          maxItems: 5
+        clock-names:
+          items:
+            - const: core
+            - const: bus
+            - const: axi
+            - const: block
+            - const: timer
+      required:
+        - canaan,usb-phy
+
   - if:
       properties:
         compatible:
-- 
2.53.0

On Thu, Feb 26, 2026 at 07:59:21PM +0800, Jiayu Du wrote:

> +    then:
> +      properties:
> +        clocks:
> +          minItems: 5

> +          maxItems: 5

This maxItems is not needed, as 5 is already the max. Drop it if you respin.
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

> +        clock-names:
> +          items:
> +            - const: core
> +            - const: bus
> +            - const: axi
> +            - const: block
> +            - const: timer
> +      required:
> +        - canaan,usb-phy
> +
>    - if:
>        properties:
>          compatible:
> -- 
> 2.53.0
>