[PATCH v8 4/9] dt-bindings: pinctrl: add bindings for Mediatek MT8365 SoC
Bernhard Rosenkränzer
bero at baylibre.com
Mon Jan 23 08:38:28 PST 2023
Add devicetree bindings for Mediatek MT8365 pinctrl driver.
Signed-off-by: Bernhard Rosenkränzer <bero at baylibre.com>
Reviewed-by: Rob Herring <robh at kernel.org>
---
.../pinctrl/mediatek,mt8365-pinctrl.yaml | 197 ++++++++++++++++++
1 file changed, 197 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pinctrl/mediatek,mt8365-pinctrl.yaml
diff --git a/Documentation/devicetree/bindings/pinctrl/mediatek,mt8365-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/mediatek,mt8365-pinctrl.yaml
new file mode 100644
index 0000000000000..4b96884a1afc7
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/mediatek,mt8365-pinctrl.yaml
@@ -0,0 +1,197 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/mediatek,mt8365-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek MT8365 Pin Controller
+
+maintainers:
+ - Zhiyong Tao <zhiyong.tao at mediatek.com>
+ - Bernhard Rosenkränzer <bero at baylibre.com>
+
+description: |
+ The MediaTek's MT8365 Pin controller is used to control SoC pins.
+
+properties:
+ compatible:
+ const: mediatek,mt8365-pinctrl
+
+ reg:
+ maxItems: 1
+
+ mediatek,pctl-regmap:
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+ items:
+ maxItems: 1
+ minItems: 1
+ maxItems: 2
+ description: |
+ Should be phandles of the syscfg node.
+
+ gpio-controller: true
+
+ "#gpio-cells":
+ const: 2
+ description: |
+ Number of cells in GPIO specifier. Since the generic GPIO
+ binding is used, the amount of cells must be specified as 2. See the below
+ mentioned gpio binding representation for description of particular cells.
+
+ interrupt-controller: true
+
+ interrupts:
+ maxItems: 1
+
+ "#interrupt-cells":
+ const: 2
+
+patternProperties:
+ "-pins$":
+ type: object
+ additionalProperties: false
+ patternProperties:
+ "pins$":
+ type: object
+ 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.
+ $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 <soc>-pinfunc.h directly.
+
+ bias-disable: true
+
+ bias-pull-up:
+ description: |
+ Besides generic pinconfig options, it can be used as the pull up
+ settings for 2 pull resistors, R0 and R1. User can configure those
+ special pins.
+
+ bias-pull-down: true
+
+ input-enable: true
+
+ input-disable: true
+
+ output-low: true
+
+ output-high: true
+
+ input-schmitt-enable: true
+
+ input-schmitt-disable: true
+
+ mediatek,drive-strength-adv:
+ description: |
+ Describe the specific driving setup property.
+ For I2C pins, the existing generic driving setup can only support
+ 2/4/6/8/10/12/14/16mA driving. But in specific driving setup, they
+ can support 0.125/0.25/0.5/1mA adjustment. If we enable specific
+ driving setup, the existing generic setup will be disabled.
+ The specific driving setup is controlled by E1E0EN.
+ When E1=0/E0=0, the strength is 0.125mA.
+ When E1=0/E0=1, the strength is 0.25mA.
+ When E1=1/E0=0, the strength is 0.5mA.
+ When E1=1/E0=1, the strength is 1mA.
+ EN is used to enable or disable the specific driving setup.
+ Valid arguments are described as below:
+ 0: (E1, E0, EN) = (0, 0, 0)
+ 1: (E1, E0, EN) = (0, 0, 1)
+ 2: (E1, E0, EN) = (0, 1, 0)
+ 3: (E1, E0, EN) = (0, 1, 1)
+ 4: (E1, E0, EN) = (1, 0, 0)
+ 5: (E1, E0, EN) = (1, 0, 1)
+ 6: (E1, E0, EN) = (1, 1, 0)
+ 7: (E1, E0, EN) = (1, 1, 1)
+ So the valid arguments are from 0 to 7.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1, 2, 3, 4, 5, 6, 7]
+
+ mediatek,pull-up-adv:
+ description: |
+ Pull up setings for 2 pull resistors, R0 and R1. User can
+ configure those special pins. Valid arguments are described as below:
+ 0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
+ 1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
+ 2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
+ 3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1, 2, 3]
+
+ mediatek,pull-down-adv:
+ description: |
+ Pull down settings for 2 pull resistors, R0 and R1. User can
+ configure those special pins. Valid arguments are described as below:
+ 0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
+ 1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
+ 2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
+ 3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1, 2, 3]
+
+ mediatek,tdsel:
+ description: |
+ An integer describing the steps for output level shifter duty
+ cycle when asserted (high pulse width adjustment). Valid arguments
+ are from 0 to 15.
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ mediatek,rdsel:
+ description: |
+ An integer describing the steps for input level shifter duty cycle
+ when asserted (high pulse width adjustment). Valid arguments are
+ from 0 to 63.
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ required:
+ - pinmux
+
+required:
+ - compatible
+ - reg
+ - gpio-controller
+ - "#gpio-cells"
+
+allOf:
+ - $ref: pinctrl.yaml#
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/pinctrl/mt8365-pinfunc.h>
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ pio: pinctrl at 1000b000 {
+ compatible = "mediatek,mt8365-pinctrl";
+ reg = <0 0x1000b000 0 0x1000>;
+ mediatek,pctl-regmap = <&syscfg_pctl>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
+
+ pio-pins {
+ pins {
+ pinmux = <MT8365_PIN_59_SDA1__FUNC_SDA1_0>, <MT8365_PIN_60_SCL1__FUNC_SCL1_0>;
+ mediatek,pull-up-adv = <3>;
+ mediatek,drive-strength-adv = <00>;
+ bias-pull-up;
+ };
+ };
+ };
+ };
--
2.39.1
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