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+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/canaan,k230-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Canaan Kendryte K230 Pin Controller
+
+maintainers:
+ - Ze Huang <18771902331@163.com>
+
+description:
+ The Canaan Kendryte K230 platform includes 64 IO pins, each capable of
+ multiplexing up to 5 different functions. Pin function configuration is
+ performed on a per-pin basis.
+
+properties:
+ compatible:
+ const: canaan,k230-pinctrl
+
+ reg:
+ maxItems: 1
+
+patternProperties:
+ '-pins$':
+ type: object
+ additionalProperties: false
+ description:
+ A pinctrl node should contain at least one subnode representing the
+ pinctrl groups available on the machine.
+
+ patternProperties:
+ '-cfg$':
+ type: object
+ $ref: /schemas/pinctrl/pincfg-node.yaml
+ additionalProperties: false
+ description:
+ Each subnode will list the pins it needs, and how they should
+ be configured, with regard to muxer configuration, bias, input
+ enable/disable, input schmitt trigger, slew-rate enable/disable,
+ slew-rate, drive strength.
+
+ properties:
+ pinmux:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description:
+ The list of GPIOs and their mux settings that properties in
+ the node apply to. This should be set with the macro
+ 'K230_PINMUX(pin, mode)'
+
+ bias-disable: true
+
+ bias-pull-up: true
+
+ bias-pull-down: true
+
+ drive-strength:
+ minimum: 0
+ maximum: 15
+
+ input-enable: true
+
+ output-enable: true
+
+ input-schmitt-enable: true
+
+ slew-rate:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ slew rate control enable
+ 0: disable
+ 1: enable
+
+ enum: [0, 1]
+
+ power-source:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Specifies the power source voltage for the IO bank that the
+ pin belongs to. Each bank of IO pins operate at a specific,
+ fixed voltage levels. Incorrect voltage configuration can
+ damage the chip. The defined constants represent the
+ possible voltage configurations:
+
+ - K230_MSC_3V3 (value 0): 3.3V power supply
+ - K230_MSC_1V8 (value 1): 1.8V power supply
+
+ The following banks have the corresponding voltage
+ configurations:
+
+ - bank IO0 to IO1: Fixed at 1.8V
+ - bank IO2 to IO13: Fixed at 1.8V
+ - bank IO14 to IO25: Fixed at 1.8V
+ - bank IO26 to IO37: Fixed at 1.8V
+ - bank IO38 to IO49: Fixed at 1.8V
+ - bank IO50 to IO61: Fixed at 3.3V
+ - bank IO62 to IO63: Fixed at 1.8V
+
+ enum: [0, 1]
+
+ required:
+ - pinmux
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ pinctrl: pinctrl@91105000 {
+ compatible = "canaan,k230-pinctrl";
+ reg = <0x91105000 0x100>;
+
+ uart2_pins: uart2-pins {
+ uart2-pins-cfg {
+ pinmux = <0x503>, /* uart2 txd */
+ <0x603>; /* uart2 rxd */
+ slew-rate = <0>;
+ drive-strength = <4>;
+ power-source = <1>;
+ input-enable;
+ output-enable;
+ bias-disable;
+ };
+ };
+ };
Add device tree binding details for Canaan K230 pinctrl device. Signed-off-by: Ze Huang <18771902331@163.com> --- .../bindings/pinctrl/canaan,k230-pinctrl.yaml | 128 ++++++++++++++++++ 1 file changed, 128 insertions(+) create mode 100644 Documentation/devicetree/bindings/pinctrl/canaan,k230-pinctrl.yaml