[PATCH v4 1/2] dt-bindings: pinctrl: renesas: Add RZ/G2L POEG binding

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

Add device tree bindings for the RZ/G2L Port Output Enable for GPT (POEG).

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
v3->v4:
 * Replaced companion->renesas,gpt for the phandle to gpt instance
 * Replaced renesas,id->renesas,poeg-id
 * Removed default from renesas,poeg-id as default for a required
   property doesn't make much sense.
 * Updated the example and required properties with above changes
v2->v3:
 * Removed Rb tag from Rob as there are some changes introduced.
 * Added companion property, so that poeg can link with gpt device
 * Documented renesas,id, as identifier for POEGG{A,B,C,D}.
 * Updated the example.
v1->v2:
 * Updated the description.
REF->v1:
 * Modelled as pincontrol as most of its configuration is intended to be
   static.
 * Updated reg size in example.
---
 .../bindings/pinctrl/renesas,rzg2l-poeg.yaml  | 86 +++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-poeg.yaml

diff --git a/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-poeg.yaml b/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-poeg.yaml
new file mode 100644
index 000000000000..ab2d456c93e4
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-poeg.yaml
@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/renesas,rzg2l-poeg.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RZ/G2L Port Output Enable for GPT (POEG)
+
+maintainers:
+  - Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
+
+description: |
+  The output pins(GTIOCxA and GTIOCxB) of the general PWM timer (GPT) can be
+  disabled by using the port output enabling function for the GPT (POEG).
+  Specifically, either of the following ways can be used.
+  * Input level detection of the GTETRGA to GTETRGD pins.
+  * Output-disable request from the GPT.
+  * SSF bit setting(ie, by setting POEGGn.SSF to 1)
+
+  The state of the GTIOCxA and the GTIOCxB pins when the output is disabled,
+  are controlled by the GPT module.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - renesas,r9a07g044-poeg  # RZ/G2{L,LC}
+          - renesas,r9a07g054-poeg  # RZ/V2L
+      - const: renesas,rzg2l-poeg
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  renesas,gpt:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle to gpt instance that serves the pwm operation.
+
+  renesas,poeg-id:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1, 2, 3 ]
+    description: |
+      POEG group index. Valid values are:
+        <0> : POEG group A
+        <1> : POEG group B
+        <2> : POEG group C
+        <3> : POEG group D
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - power-domains
+  - resets
+  - renesas,poeg-id
+  - renesas,gpt
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r9a07g044-cpg.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    poeggd: poeg@10049400 {
+        compatible = "renesas,r9a07g044-poeg", "renesas,rzg2l-poeg";
+        reg = <0x10049400 0x400>;
+        interrupts = <GIC_SPI 325 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&cpg CPG_MOD R9A07G044_POEG_D_CLKP>;
+        power-domains = <&cpg>;
+        resets = <&cpg R9A07G044_POEG_D_RST>;
+        renesas,poeg-id = <3>;
+        renesas,gpt = <&gpt>;
+    };
-- 
2.25.1