[PATCH 1/8] dt-bindings: iio: adc: renesas,r9a09g077-adc: Add RZ/V2H(P) and RZ/V2N support

[Prabhakar]

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>

Extend the ADC binding for the RZ/V2H(P) and RZ/V2N SoCs to describe the
ADC variant used by these SoCs and its differences from RZ/T2H.

The RZ/V2H(P) ADC provides 8 channels, has a fixed conversion time of
20 ADCLK cycles, does not support calibration, and supports selectable
12-bit and 8-bit conversion resolution.

Add RZ/V2N with RZ/V2H(P) as its fallback compatible, as the ADC IP is
identical between the two SoCs.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
---
 .../iio/adc/renesas,r9a09g077-adc.yaml        | 38 +++++++++++++++++--
 1 file changed, 34 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/iio/adc/renesas,r9a09g077-adc.yaml b/Documentation/devicetree/bindings/iio/adc/renesas,r9a09g077-adc.yaml
index 5b496729022e..a0fed2f31370 100644
--- a/Documentation/devicetree/bindings/iio/adc/renesas,r9a09g077-adc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/renesas,r9a09g077-adc.yaml
@@ -18,10 +18,14 @@ description: |
 properties:
   compatible:
     oneOf:
+      - enum:
+          - renesas,r9a09g057-adc # RZ/V2H(P)
+          - renesas,r9a09g077-adc # RZ/T2H
       - items:
-          - const: renesas,r9a09g087-adc # RZ/N2H
-          - const: renesas,r9a09g077-adc # RZ/T2H
+          - const: renesas,r9a09g056-adc # RZ/V2N
+          - const: renesas,r9a09g057-adc # RZ/V2H(P)
       - items:
+          - const: renesas,r9a09g087-adc # RZ/N2H
           - const: renesas,r9a09g077-adc # RZ/T2H
 
   reg:
@@ -55,19 +59,22 @@ properties:
 
   dmas:
     minItems: 1
-    maxItems: 3
+    maxItems: 5
     description:
       Must contain a list of references to DMA RX specifiers.
 
   dma-names:
     minItems: 1
-    maxItems: 3
+    maxItems: 5
     items:
       const: rx
 
   power-domains:
     maxItems: 1
 
+  resets:
+    maxItems: 1
+
   '#address-cells':
     const: 1
 
@@ -101,6 +108,29 @@ required:
   - clock-names
   - power-domains
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a09g057-adc
+    then:
+      required:
+        - resets
+      patternProperties:
+        "^channel@[8-f]$": false
+        "^channel@[0-7]$":
+          properties:
+            reg:
+              maximum: 7
+    else:
+      properties:
+        dmas:
+          maxItems: 3
+        dma-names:
+          maxItems: 3
+        resets: false
+
 additionalProperties: false
 
 examples:
-- 
2.55.0