[PATCH 01/10] dt-bindings: mmc: spacemit,sdhci: add AIB voltage switching registers

[Iker Pedrosa]

Add SpacemiT K1 AIB register properties for UHS voltage switching
support:

- spacemit,aib-mmc1-io-reg: AIB MMC1 IO register address for voltage
  switching
- spacemit,apbc-asfar-reg: APBC ASFAR register address for AIB access
- spacemit,apbc-assar-reg: APBC ASSAR register address for AIB access

These properties enable the driver to perform voltage switching between
3.3V and 1.8V required for UHS SD card modes.

Signed-off-by: Iker Pedrosa <ikerpedrosam at gmail.com>
---
 Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml b/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml
index 13d9382058fbc1c12be1024d1c550f04a825673c..4d6590aa8262009b6e5697a04b45cf3736c0fa42 100644
--- a/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml
+++ b/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml
@@ -32,6 +32,18 @@ properties:
       - const: core
       - const: io
 
+  spacemit,aib-mmc1-io-reg:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: AIB MMC1 IO register address for voltage switching
+
+  spacemit,apbc-asfar-reg:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: APBC ASFAR register address for AIB access
+
+  spacemit,apbc-assar-reg:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: APBC ASSAR register address for AIB access
+
 required:
   - compatible
   - reg
@@ -50,4 +62,7 @@ examples:
       interrupt-parent = <&plic>;
       clocks = <&clk_apmu 10>, <&clk_apmu 13>;
       clock-names = "core", "io";
+      spacemit,aib-mmc1-io-reg = <0xd401e81c>;
+      spacemit,apbc-asfar-reg = <0xd4015050>;
+      spacemit,apbc-assar-reg = <0xd4015054>;
     };

-- 
2.53.0