[v2 2/3] dt-bindings: pinctrl: Add cix,sky1-pinctrl

[Gary Yang]

The pin-controller is used to control the Soc pins.
There are two pin-controllers on Cix Sky1 platform.
One is used under S0 state, the other is used under
S5 state.

Signed-off-by: Gary Yang <gary.yang at cixtech.com>
---
 .../bindings/pinctrl/cix,sky1-pinctrl.yaml    | 85 +++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/cix,sky1-pinctrl.yaml

diff --git a/Documentation/devicetree/bindings/pinctrl/cix,sky1-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/cix,sky1-pinctrl.yaml
new file mode 100644
index 000000000000..c4a127fd8330
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/cix,sky1-pinctrl.yaml
@@ -0,0 +1,85 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/cix,sky1-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cix Sky1 Pin Controller
+
+maintainers:
+  - Gary Yang <gary.yang at cixtech.com>
+
+description:
+  The pin-controller is used to control Soc pins. There are two pin-controllers
+  on Cix Sky1 platform. one is used under S0 state, the other one is used under
+  S5 state.
+
+properties:
+  compatible:
+    enum:
+      - cix,sky1-iomuxc
+      - cix,sky1-iomuxc-s5
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+# Client device subnode's properties
+patternProperties:
+  'pins$':
+    type: object
+    additionalProperties: false
+    patternProperties:
+      '(^pins|pins?$)':
+        type: object
+        additionalProperties: false
+        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, and drive strength.
+        $ref: /schemas/pinctrl/pincfg-node.yaml
+
+        properties:
+          pinmux:
+            description:
+              Integer array, represents gpio pin number and mux setting.
+              Supported pin number and mux varies for different SoCs, and are
+              defined as macros in arch/arm64/boot/dts/cix/sky1-pinfunc.h directly.
+
+          bias-disable: true
+
+          bias-pull-up: true
+
+          bias-pull-down: true
+
+          drive-strength:
+            description:
+              Can support 15 levels, from DS_LEVEL1 to DS_LEVEL15.
+              See arch/arm64/boot/dts/cix/sky1-pinfunc.h for valid arguments.
+
+        required:
+          - pinmux
+
+additionalProperties: false
+
+examples:
+  # Pinmux controller node
+  - |
+    #define CIX_PAD_GPIO012_FUNC_GPIO012 (11 << 8 | 0x0)
+    #define DS_LEVEL4 (4)
+    iomuxc: pinctrl at 4170000 {
+        compatible = "cix,sky1-iomuxc";
+        reg = <0x4170000 0x1000>;
+
+        wifi_vbat_gpio: wifi-vbat-gpio-pins {
+            pins-wifi-vbat-gpio {
+                pinmux = <CIX_PAD_GPIO012_FUNC_GPIO012>;
+                bias-pull-up;
+                drive-strength = <DS_LEVEL4>;
+           };
+        };
+    };
-- 
2.49.0