[PATCH v2 1/2] dt-bindings: mmc: mtk-sd: Document support for Airoha AN7581 SoC

[PATCH v2 1/2] dt-bindings: mmc: mtk-sd: Document support for Airoha AN7581 SoC

[Christian Marangi]

Add dedicated compatible for Airoha AN7581 SoC integrated MMC controller.
The MMC controller is based on the MT7988 with the difference that it does
have a single clock controlling it.

Add the dedicated compatible to describe the 2 register requirement and
permit to define only 2 clock (the main one and a fixed clock for HS)

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
Changes v2:
- Also add compatible to restrict clock-names for source and hclk
 Documentation/devicetree/bindings/mmc/mtk-sd.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
index a4d032224dce..704d59360bcb 100644
--- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
+++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
@@ -14,6 +14,7 @@ properties:
   compatible:
     oneOf:
       - enum:
+          - airoha,an7581-mmc
           - mediatek,mt2701-mmc
           - mediatek,mt2712-mmc
           - mediatek,mt6779-mmc
@@ -182,6 +183,7 @@ allOf:
       properties:
         compatible:
           enum:
+            - airoha,an7581-mmc
             - mediatek,mt2701-mmc
             - mediatek,mt6779-mmc
             - mediatek,mt6795-mmc
@@ -238,6 +240,7 @@ allOf:
         compatible:
           contains:
             enum:
+              - airoha,an7581-mmc
               - mediatek,mt7986-mmc
               - mediatek,mt7988-mmc
               - mediatek,mt8183-mmc
-- 
2.55.0

[PATCH v2 2/2] mmc: mtk-sd: Add Airoha AN7581 MMC compatible

[Christian Marangi]

Add dedicated compatible for Airoha AN7581 SoC that implement a dedicated
MMC controller based on MT7988 with the difference of having a single clock
controlling it.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/mmc/host/mtk-sd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 5b160fdad3f0..736cff2783e2 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -713,6 +713,7 @@ static const struct mtk_mmc_compatible mt8196_compat = {
 };
 
 static const struct of_device_id msdc_of_ids[] = {
+	{ .compatible = "airoha,an7581-mmc", .data = &mt7986_compat},
 	{ .compatible = "mediatek,mt2701-mmc", .data = &mt2701_compat},
 	{ .compatible = "mediatek,mt2712-mmc", .data = &mt2712_compat},
 	{ .compatible = "mediatek,mt6779-mmc", .data = &mt6779_compat},
-- 
2.55.0

Re: [PATCH v2 1/2] dt-bindings: mmc: mtk-sd: Document support for Airoha AN7581 SoC

[Krzysztof Kozlowski]

On Tue, Oct 27, 2026 at 03:40:00PM +0100, Christian Marangi wrote:
> Add dedicated compatible for Airoha AN7581 SoC integrated MMC controller.
> The MMC controller is based on the MT7988 with the difference that it does
> have a single clock controlling it.
> 
> Add the dedicated compatible to describe the 2 register requirement and
> permit to define only 2 clock (the main one and a fixed clock for HS)
> 
> Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
> ---
> Changes v2:
> - Also add compatible to restrict clock-names for source and hclk
>  Documentation/devicetree/bindings/mmc/mtk-sd.yaml | 3 +++
>  1 file changed, 3 insertions(+)
> 

Your driver part suggests it's fully compatible with other variant. Why
not expressing it with fallback?

Best regards,
Krzysztof

Re: [PATCH v2 1/2] dt-bindings: mmc: mtk-sd: Document support for Airoha AN7581 SoC

[Christian Marangi]

On Wed, Oct 28, 2026 at 01:51:16PM +0100, Krzysztof Kozlowski wrote:
> On Tue, Oct 27, 2026 at 03:40:00PM +0100, Christian Marangi wrote:
> > Add dedicated compatible for Airoha AN7581 SoC integrated MMC controller.
> > The MMC controller is based on the MT7988 with the difference that it does
> > have a single clock controlling it.
> > 
> > Add the dedicated compatible to describe the 2 register requirement and
> > permit to define only 2 clock (the main one and a fixed clock for HS)
> > 
> > Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
> > ---
> > Changes v2:
> > - Also add compatible to restrict clock-names for source and hclk
> >  Documentation/devicetree/bindings/mmc/mtk-sd.yaml | 3 +++
> >  1 file changed, 3 insertions(+)
> > 
> 
> Your driver part suggests it's fully compatible with other variant. Why
> not expressing it with fallback?
> 

You mean something like 

   compatible = "airoha,an7581-mmc", "mediatek,mt7988-mmc";

? (my concern is if this would be problematic with the current if
conditions in the schema)

The driver is very liberal for the clock configuration as it does use lots
of _optional... But it's not possible to reuse one of the current
compatible as they all require additional property that Airoha SoC doesn't
have (either additional clocks or single register)

-- 
	Ansuel