[PATCH v18 2/4] dt-bindings: pwm: rzg2l-gpt: Document renesas,poegs property

[Biju Das <biju.das.jz@xxxxxxxxxxxxxx>]

RZ/G2L GPT IP supports output pin disable function by dead time
error and detecting short-circuits between output pins.

Add documentation for the optional property renesas,poegs to
link a pair of GPT IOs with POEG.

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
---
v17->v18:
 * No change.
v16->v17:
 * No change.
v15->v16:
 * No change.
v14->v15:
 * No change.
v3->v14:
 * Add Rb tag from Rob.
 * Moved the patch from series[1] to here.
 [1] https://lore.kernel.org/linux-renesas-soc/20221215205843.4074504-1-biju.das.jz@xxxxxxxxxxxxxx/T/#t
v2->v3:
 * Moved minItems/MaxItems one level up.
v1->v2:
 * removed quotes from ref
 * Added maxItems and minItems for renesas,poegs property
 * Added enums for gpt index
---
 .../bindings/pwm/renesas,rzg2l-gpt.yaml       | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/Documentation/devicetree/bindings/pwm/renesas,rzg2l-gpt.yaml b/Documentation/devicetree/bindings/pwm/renesas,rzg2l-gpt.yaml
index d9374144d82d..957cf28b2c4c 100644
--- a/Documentation/devicetree/bindings/pwm/renesas,rzg2l-gpt.yaml
+++ b/Documentation/devicetree/bindings/pwm/renesas,rzg2l-gpt.yaml
@@ -245,6 +245,28 @@ properties:
   resets:
     maxItems: 1
 
+  renesas,poegs:
+    minItems: 1
+    maxItems: 8
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      items:
+        - description: phandle to POEG instance that serves the output disable
+        - enum: [ 0, 1, 2, 3, 4, 5, 6, 7 ]
+          description: |
+            An index identifying pair of GPT channels.
+              <0> : GPT channels 0 and 1
+              <1> : GPT channels 2 and 3
+              <2> : GPT channels 4 and 5
+              <3> : GPT channels 6 and 7
+              <4> : GPT channels 8 and 9
+              <5> : GPT channels 10 and 11
+              <6> : GPT channels 12 and 13
+              <7> : GPT channels 14 and 15
+    description:
+      A list of phandle and channel index pair tuples to the POEGs that handle the
+      output disable for the GPT channels.
+
 required:
   - compatible
   - reg
@@ -375,4 +397,5 @@ examples:
         power-domains = <&cpg>;
         resets = <&cpg R9A07G044_GPT_RST_C>;
         #pwm-cells = <2>;
+        renesas,poegs = <&poeggd 4>;
     };
-- 
2.25.1