[PATCH v2 1/2] mmc: dt-bindings: sdhci-of-aspeed: Add AST2700 fallback compatibles

Ryan Chen
2026-03-17T05:57:20Z

Describe AST2700 as compatible with the existing AST2600 SD controller
and SDHCI bindings by requiring fallback compatibles in the device tree.

Also require `resets` on the AST2700 SD controller node.

Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
---
Changes in v2:
- add missing blank line
- modify ast2700 compatible items const
---
.../devicetree/bindings/mmc/aspeed,sdhci.yaml | 39 +++++++++++++++++-----
1 file changed, 31 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml b/Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml
index d24950ccea95..9c8e068964a1 100644
--- a/Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml
+++ b/Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml
@@ -22,10 +22,14 @@ description: |+

properties:
compatible:
- enum:
- - aspeed,ast2400-sd-controller
- - aspeed,ast2500-sd-controller
- - aspeed,ast2600-sd-controller
+ oneOf:
+ - const: aspeed,ast2400-sd-controller
+ - const: aspeed,ast2500-sd-controller
+ - const: aspeed,ast2600-sd-controller
+ - items:
+ - const: aspeed,ast2700-sd-controller
+ - const: aspeed,ast2600-sd-controller
+
reg:
maxItems: 1
description: Common configuration registers
@@ -38,6 +42,21 @@ properties:
maxItems: 1
description: The SD/SDIO controller clock gate

+ resets:
+ maxItems: 1
+
+if:
+ properties:
+ compatible:
+ contains:
+ const: aspeed,ast2700-sd-controller
+then:
+ required:
+ - resets
+else:
+ properties:
+ resets: false
+
patternProperties:
"^sdhci@[0-9a-f]+$":
type: object
@@ -46,10 +65,14 @@ patternProperties:

properties:
compatible:
- enum:
- - aspeed,ast2400-sdhci
- - aspeed,ast2500-sdhci
- - aspeed,ast2600-sdhci
+ oneOf:
+ - const: aspeed,ast2400-sdhci
+ - const: aspeed,ast2500-sdhci
+ - const: aspeed,ast2600-sdhci
+ - items:
+ - const: aspeed,ast2700-sdhci
+ - const: aspeed,ast2600-sdhci
+
reg:
maxItems: 1
description: The SDHCI registers

--
2.34.1