dt-bindings: pinctrl: mediatek: Add support for mt8189

Add the new binding document for pinctrl on MediaTek mt8189.

Signed-off-by: Cathy Xu <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Reviewed-by: Rob Herring (Arm) <[email protected]>
Link: https://lore.kernel.org/[email protected]
Signed-off-by: Linus Walleij <[email protected]>

Author: CathyXu12

Documentation/devicetree/bindings/pinctrl/mediatek,mt8189-pinctrl.yaml

@@ -0,0 +1,213 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/mediatek,mt8189-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT8189 Pin Controller
+
+maintainers:
+  - Lei Xue <[email protected]>
+  - Cathy Xu <[email protected]>
+
+description:
+  The MediaTek's MT8189 Pin controller is used to control SoC pins.
+
+properties:
+  compatible:
+    const: mediatek,mt8189-pinctrl
+
+  reg:
+    items:
+      - description: gpio base
+      - description: lm group IO
+      - description: rb0 group IO
+      - description: rb1 group IO
+      - description: bm0 group IO
+      - description: bm1 group IO
+      - description: bm2 group IO
+      - description: lt0 group IO
+      - description: lt1 group IO
+      - description: rt group IO
+      - description: eint0 group IO
+      - description: eint1 group IO
+      - description: eint2 group IO
+      - description: eint3 group IO
+      - description: eint4 group IO
+
+  reg-names:
+    items:
+      - const: base
+      - const: lm
+      - const: rb0
+      - const: rb1
+      - const: bm0
+      - const: bm1
+      - const: bm2
+      - const: lt0
+      - const: lt1
+      - const: rt
+      - const: eint0
+      - const: eint1
+      - const: eint2
+      - const: eint3
+      - const: eint4
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 2
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    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/mt8189-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: mt8189 pull down PUPD/R0/R1 type define value.
+              - enum: [75000, 5000]
+                description: mt8189 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 mt8189.
+
+              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".
+
+          bias-pull-up:
+            oneOf:
+              - type: boolean
+              - enum: [100, 101, 102, 103]
+                description: mt8189 pull up PUPD/R0/R1 type define value.
+              - enum: [1000, 1500, 2000, 3000, 4000, 5000, 75000]
+                description: mt8189 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 mt8189.
+
+              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".
+
+          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_GPIO51__FUNC_SCL0 (MTK_PIN_NO(51) | 2)
+    #define PINMUX_GPIO52__FUNC_SDA0 (MTK_PIN_NO(52) | 2)
+
+    pio: pinctrl@10005000 {
+        compatible = "mediatek,mt8189-pinctrl";
+        reg = <0x10005000 0x1000>,
+              <0x11b50000 0x1000>,
+              <0x11c50000 0x1000>,
+              <0x11c60000 0x1000>,
+              <0x11d20000 0x1000>,
+              <0x11d30000 0x1000>,
+              <0x11d40000 0x1000>,
+              <0x11e20000 0x1000>,
+              <0x11e30000 0x1000>,
+              <0x11f20000 0x1000>,
+              <0x11ce0000 0x1000>,
+              <0x11de0000 0x1000>,
+              <0x11e60000 0x1000>,
+              <0x1c01e000 0x1000>,
+              <0x11f00000 0x1000>;
+        reg-names = "base", "lm", "rb0", "rb1", "bm0" , "bm1",
+                    "bm2", "lt0", "lt1", "rt", "eint0", "eint1",
+                    "eint2", "eint3", "eint4";
+        gpio-controller;
+        #gpio-cells = <2>;
+        gpio-ranges = <&pio 0 0 182>;
+        interrupt-controller;
+        interrupts = <GIC_SPI 239 IRQ_TYPE_LEVEL_HIGH 0>;
+        #interrupt-cells = <2>;
+
+        i2c0-pins {
+            pins {
+                pinmux = <PINMUX_GPIO51__FUNC_SCL0>,
+                         <PINMUX_GPIO52__FUNC_SDA0>;
+                bias-disable;
+            };
+        };
+    };