[PATCH v13 1/2] dt-bindings: mmc: mtk-sd: increase reg items

[Tinghan Shen <tinghan.shen@mediatek.com>]

MediaTek has a new version of mmc IP since mt8183. Some IO registers
are moved to top to improve hardware design and named as "host top
registers".

Add host top register in the reg binding description for mt8183 and
successors.

Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com>
Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
---
 Documentation/devicetree/bindings/mmc/mtk-sd.yaml | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
index 297ada03e3de..2a2e9fa8c188 100644
--- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
+++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
@@ -40,7 +40,10 @@ properties:
           - const: mediatek,mt8183-mmc
 
   reg:
-    maxItems: 1
+    minItems: 1
+    items:
+      - description: base register (required).
+      - description: top base register (required for MT8183).
 
   clocks:
     description:
@@ -168,6 +171,16 @@ required:
   - vmmc-supply
   - vqmmc-supply
 
+if:
+  properties:
+    compatible:
+      contains:
+        const: mediatek,mt8183-mmc
+then:
+  properties:
+    reg:
+      minItems: 2
+
 unevaluatedProperties: false
 
 examples:
-- 
2.18.0