[PATCH v3 1/3] dt-bindings: mmc: Add sdhci support for Canaan k230

Jiayu Du
2026-03-10T06:45:54Z

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>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
---
.../bindings/mmc/snps,dwcmshc-sdhci.yaml | 28 +++++++++++++++++++
1 file changed, 28 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml b/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml
index 5cebe5eb1efb..2e3ac1053065 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
@@ -57,6 +59,11 @@ properties:
minItems: 4
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
@@ -89,6 +96,27 @@ required:
allOf:
- $ref: mmc-controller.yaml#

+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - canaan,k230-emmc
+ - canaan,k230-sdio
+ then:
+ properties:
+ clocks:
+ minItems: 5
+ clock-names:
+ items:
+ - const: core
+ - const: bus
+ - const: axi
+ - const: block
+ - const: timer
+ required:
+ - canaan,usb-phy
+