[v6,1/3] dt-bindings: pinctrl: mediatek: Add support for mt8196

diff --git a/Documentation/devicetree/bindings/pinctrl/mediatek,mt8196-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/mediatek,mt8196-pinctrl.yaml
new file mode 100644
index 000000000000..cef7e0321722
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+++ b/Documentation/devicetree/bindings/pinctrl/mediatek,mt8196-pinctrl.yaml
@@ -0,0 +1,220 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/mediatek,mt8196-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT8196 Pin Controller
+
+maintainers:
+  - Lei Xue <lei.xue@mediatek.com>
+  - Cathy Xu <ot_cathy.xu@mediatek.com>
+
+description:
+  The MediaTek's MT8196 Pin controller is used to control SoC pins.
+
+properties:
+  compatible:
+    const: mediatek,mt8196-pinctrl
+
+  reg:
+    items:
+      - description: gpio base
+      - description: rt group IO
+      - description: rm1 group IO
+      - description: rm2 group IO
+      - description: rb group IO
+      - description: bm1 group IO
+      - description: bm2 group IO
+      - description: bm3 group IO
+      - description: lt group IO
+      - description: lm1 group IO
+      - description: lm2 group IO
+      - description: lb1 group IO
+      - description: lb2 group IO
+      - description: tm1 group IO
+      - description: tm2 group IO
+      - description: tm3 group IO
+
+  reg-names:
+    items:
+      - const: base
+      - const: rt
+      - const: rm1
+      - const: rm2
+      - const: rb
+      - const: bm1
+      - const: bm2
+      - const: bm3
+      - const: lt
+      - const: lm1
+      - const: lm2
+      - const: lb1
+      - const: lb2
+      - const: tm1
+      - const: tm2
+      - const: tm3
+
+  interrupts:
+    description: The interrupt outputs to sysirq.
+    maxItems: 1
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 2
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    description:
+      Number of cells in GPIO specifier, should be two. The first cell is the
+      pin number, the second cell is used to specify optional parameters which
+      are defined in <dt-bindings/gpio/gpio.h>.
+    const: 2
+
+  gpio-ranges:
+    maxItems: 1
+
+  gpio-line-names: true
+
+# PIN CONFIGURATION NODES
+patternProperties:
+  '-pins$':
+    type: object
+    additionalProperties: false
+
+    patternProperties:
+      '^pins':
+        type: object
+        $ref: /schemas/pinctrl/pincfg-node.yaml
+        additionalProperties: false
+        description:
+          A pinctrl node should contain at least one subnode 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.
+
+        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/mediatek/mt8196-pinfunc.h
+              directly, for this SoC.
+
+          drive-strength:
+            enum: [2, 4, 6, 8, 10, 12, 14, 16]
+
+          bias-pull-down:
+            oneOf:
+              - type: boolean
+              - enum: [100, 101, 102, 103]
+                description: mt8196 pull down PUPD/R0/R1 type define value.
+              - enum: [75000, 5000]
+                description: mt8196 pull down RSEL type si unit value(ohm).
+            description: |
+              For pull down type is normal, it doesn't need add R1R0 define
+              and resistance value.
+              For pull down type is PUPD/R0/R1 type, it can add R1R0 define to
+              set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
+              "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" &
+              "MTK_PUPD_SET_R1R0_11" define in mt8196.
+              For pull down type is PD/RSEL, it can add resistance value(ohm)
+              to set different resistance by identifying property
+              "mediatek,rsel-resistance-in-si-unit". It can support resistance
+              value(ohm) "75000" & "5000" in mt8196.
+
+          bias-pull-up:
+            oneOf:
+              - type: boolean
+              - enum: [100, 101, 102, 103]
+                description: mt8196 pull up PUPD/R0/R1 type define value.
+              - enum: [1000, 1500, 2000, 3000, 4000, 5000, 75000]
+                description: mt8196 pull up RSEL type si unit value(ohm).
+            description: |
+              For pull up type is normal, it don't need add R1R0 define
+              and resistance value.
+              For pull up type is PUPD/R0/R1 type, it can add R1R0 define to
+              set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
+              "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" &
+              "MTK_PUPD_SET_R1R0_11" define in mt8196.
+              For pull up type is PU/RSEL, it can add resistance value(ohm)
+              to set different resistance by identifying property
+              "mediatek,rsel-resistance-in-si-unit". It can support resistance
+              value(ohm) "1000" & "1500" & "2000" & "3000" & "4000" & "5000" &
+              "75000" in mt8196.
+
+          bias-disable: true
+
+          output-high: true
+
+          output-low: true
+
+          input-enable: true
+
+          input-disable: true
+
+          input-schmitt-enable: true
+
+          input-schmitt-disable: true
+
+        required:
+          - pinmux
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-controller
+  - '#interrupt-cells'
+  - gpio-controller
+  - '#gpio-cells'
+  - gpio-ranges
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/pinctrl/mt65xx.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #define PINMUX_GPIO99__FUNC_SCL0 (MTK_PIN_NO(99) | 1)
+    #define PINMUX_GPIO100__FUNC_SDA0 (MTK_PIN_NO(100) | 1)
+
+    pio: pinctrl@1002d000 {
+        compatible = "mediatek,mt8196-pinctrl";
+        reg = <0x1002d000 0x1000>,
+              <0x12000000 0x1000>,
+              <0x12020000 0x1000>,
+              <0x12040000 0x1000>,
+              <0x12060000 0x1000>,
+              <0x12820000 0x1000>,
+              <0x12840000 0x1000>,
+              <0x12860000 0x1000>,
+              <0x13000000 0x1000>,
+              <0x13020000 0x1000>,
+              <0x13040000 0x1000>,
+              <0x130f0000 0x1000>,
+              <0x13110000 0x1000>,
+              <0x13800000 0x1000>,
+              <0x13820000 0x1000>,
+              <0x13860000 0x1000>;
+        reg-names = "base", "rt","rm1", "rm2", "rb",
+                    "bm1", "bm2", "bm3","lt", "lm1",
+                    "lm2","lb1", "lb2", "tm1","tm2", "tm3";
+        gpio-controller;
+        #gpio-cells = <2>;
+        gpio-ranges = <&pio 0 0 271>;
+        interrupt-controller;
+        interrupts = <GIC_SPI 396 IRQ_TYPE_LEVEL_HIGH 0>;
+        #interrupt-cells = <2>;
+
+        i2c0-pins {
+            pins {
+                pinmux = <PINMUX_GPIO99__FUNC_SCL0>,
+                         <PINMUX_GPIO100__FUNC_SDA0>;
+                bias-disable;
+            };
+        };
+    };