dt-bindings: mmc: renesas,sdhi: Document RZ/G2L bindings

Document RZ/G2L SDHI controller bindings.
Signed-off-by: NBiju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: NLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210817090313.31858-3-biju.das.jz@bp.renesas.comSigned-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Documentation/devicetree/bindings/mmc/renesas,sdhi.yaml

@@ -57,6 +57,7 @@ properties:
               - renesas,sdhi-r8a77990  # R-Car E3
               - renesas,sdhi-r8a77995  # R-Car D3
               - renesas,sdhi-r8a779a0  # R-Car V3U
+              - renesas,sdhi-r9a07g044 # RZ/G2{L,LC}
           - const: renesas,rcar-gen3-sdhi # R-Car Gen3 or RZ/G2
 
   reg:
@@ -66,15 +67,9 @@ properties:
     minItems: 1
     maxItems: 3
 
-  clocks:
-    minItems: 1
-    maxItems: 2
+  clocks: true
 
-  clock-names:
-    minItems: 1
-    items:
-      - const: core
-      - const: cd
+  clock-names: true
 
   dmas:
     minItems: 4
@@ -108,6 +103,42 @@ properties:
 allOf:
   - $ref: "mmc-controller.yaml"
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,sdhi-r9a07g044
+    then:
+      properties:
+        clocks:
+          items:
+            - description: IMCLK, SDHI channel main clock1.
+            - description: IMCLK2, SDHI channel main clock2. When this clock is
+                           turned off, external SD card detection cannot be
+                           detected.
+            - description: CLK_HS, SDHI channel High speed clock which operates
+                           4 times that of SDHI channel main clock1.
+            - description: ACLK, SDHI channel bus clock.
+        clock-names:
+          items:
+            - const: imclk
+            - const: imclk2
+            - const: clk_hs
+            - const: aclk
+      required:
+        - clock-names
+        - resets
+    else:
+      properties:
+        clocks:
+          minItems: 1
+          maxItems: 2
+        clock-names:
+          minItems: 1
+          items:
+            - const: core
+            - const: cd
+
   - if:
       properties:
         compatible: