[PATCH v2 2/4] dt-bindings: pinctrl: Document nuvoton ma35d1 pin control

[Jacky Huang]

From: Jacky Huang <ychuang3@xxxxxxxxxxx>

Add documentation to describe nuvoton ma35d1 pin control and GPIO.

Signed-off-by: Jacky Huang <ychuang3@xxxxxxxxxxx>
---
 .../pinctrl/nuvoton,ma35d1-pinctrl.yaml       | 189 ++++++++++++++++++
 1 file changed, 189 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/nuvoton,ma35d1-pinctrl.yaml

diff --git a/Documentation/devicetree/bindings/pinctrl/nuvoton,ma35d1-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/nuvoton,ma35d1-pinctrl.yaml
new file mode 100644
index 000000000000..84287293a726
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/nuvoton,ma35d1-pinctrl.yaml
@@ -0,0 +1,189 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/nuvoton,ma35d1-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton MA35D1 pin control and GPIO
+
+maintainers:
+  - Shan-Chun Hung <schung@xxxxxxxxxxx>
+
+properties:
+  compatible:
+    enum:
+      - nuvoton,ma35d1-pinctrl
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+  nuvoton,sys:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle of the system-management node.
+
+  ranges: true
+
+allOf:
+  - $ref: pinctrl.yaml#
+
+required:
+  - compatible
+  - nuvoton,sys
+
+patternProperties:
+  "^gpio@[0-9a-f]+$":
+    type: object
+    additionalProperties: false
+    properties:
+      gpio-controller: true
+
+      '#gpio-cells':
+        const: 2
+
+      reg:
+        maxItems: 1
+
+      clocks:
+        maxItems: 1
+
+      interrupt-controller: true
+
+      '#interrupt-cells':
+        const: 2
+
+      interrupts:
+        description:
+          The interrupt outputs to sysirq.
+        maxItems: 1
+
+    required:
+      - gpio-controller
+      - '#gpio-cells'
+      - reg
+      - clocks
+      - interrupt-controller
+      - '#interrupt-cells'
+      - interrupts
+
+  "^pin-[a-z0-9]+$":
+    type: object
+    description:
+      A pinctrl node should contain at least one subnodes representing the
+      pinctrl groups available on the machine. Each subnode will list the
+      pins it needs, and how they should be configured, with regard to muxer
+      configuration, pullups, drive strength, input enable/disable and input
+      schmitt.
+
+    allOf:
+      - $ref: pincfg-node.yaml#
+
+    properties:
+      bias-disable: true
+
+      bias-pull-down: true
+
+      bias-pull-up: true
+
+      power-source:
+        description: |
+          Valid arguments are described as below:
+          0: power supply of 1.8V
+          1: power supply of 3.3V
+        enum: [0, 1]
+
+      drive-strength-microamp:
+        oneOf:
+          - enum: [ 2900, 4400, 5800, 7300, 8600, 10100, 11500, 13000 ]
+            description: 1.8V I/O driving strength
+          - enum: [ 17100, 25600, 34100, 42800, 48000, 56000, 77000, 82000 ]
+            description: 3.3V I/O driving strength
+
+      input-enable: true
+
+      input-schmitt-enable: true
+
+    unevaluatedProperties: false
+
+  "-grp$":
+    type: object
+    description:
+      Pinctrl node's client devices use subnodes for desired pin configuration.
+      Client device subnodes use below standard properties.
+    properties:
+      nuvoton,pins:
+        description:
+          Each entry consists of 4 parameters and represents the mux and config
+          setting for one pin.
+        $ref: /schemas/types.yaml#/definitions/uint32-matrix
+        minItems: 1
+        items:
+          items:
+            - minimum: 0
+              maximum: 13
+              description:
+                Pin bank.
+            - minimum: 0
+              maximum: 15
+              description:
+                Pin bank index.
+            - minimum: 0
+              maximum: 15
+              description:
+                Mux 0 means GPIO and mux 1 to 15 means the specific device function.
+            - description:
+                The phandle of a node contains the generic pinconfig options
+                to use as described in pinctrl-bindings.txt.
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
+    #include <dt-bindings/pinctrl/ma35d1-pinfunc.h>
+
+    pinctrl@40040000 {
+        compatible = "nuvoton,ma35d1-pinctrl";
+        #address-cells = <1>;
+        #size-cells = <1>;
+        nuvoton,sys = <&sys>;
+        ranges = <0 0x40040000 0xc00>;
+
+        gpio@40040000 {
+            reg = <0x0 0x40>;
+            interrupts = <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&clk GPA_GATE>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            interrupt-controller;
+            #interrupt-cells = <2>;
+        };
+
+        pcfg_default: pin-default {
+            slew-rate = <0>;
+            input-schmitt-disable;
+            bias-disable;
+            power-source = <1>;
+            drive-strength-microamp = <17100>;
+        };
+
+        uart-grp {
+            uart11-pins {
+                nuvoton,pins = <11 0 2 &pcfg_default>,
+                               <11 1 2 &pcfg_default>,
+                               <11 2 2 &pcfg_default>,
+                               <11 3 2 &pcfg_default>;
+            };
+
+            uart12-pins {
+                nuvoton,pins = <8 1 2 &pcfg_default>,
+                               <8 2 2 &pcfg_default>,
+                               <8 3 2 &pcfg_default>;
+            };
+        };
+    };
-- 
2.34.1