0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/serio/ps2-gpio.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Bindings for GPIO based PS/2
0008
0009 maintainers:
0010 - Danilo Krummrich <danilokrummrich@dk-develop.de>
0011
0012 properties:
0013 compatible:
0014 const: ps2-gpio
0015
0016 data-gpios:
0017 description:
0018 the gpio used for the data signal - this should be flagged as
0019 active high using open drain with (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)
0020 from <dt-bindings/gpio/gpio.h> since the signal is open drain by
0021 definition
0022 maxItems: 1
0023
0024 clk-gpios:
0025 description:
0026 the gpio used for the clock signal - this should be flagged as
0027 active high using open drain with (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)
0028 from <dt-bindings/gpio/gpio.h> since the signal is open drain by
0029 definition
0030 maxItems: 1
0031
0032 interrupts:
0033 description:
0034 The given interrupt should trigger on the falling edge of the clock line.
0035 maxItems: 1
0036
0037 write-enable:
0038 type: boolean
0039 description:
0040 Indicates whether write function is provided to serio device. Possibly
0041 providing the write function will not work, because of the tough timing
0042 requirements.
0043
0044 required:
0045 - compatible
0046 - data-gpios
0047 - clk-gpios
0048 - interrupts
0049
0050 additionalProperties: false
0051
0052 examples:
0053 - |
0054 #include <dt-bindings/gpio/gpio.h>
0055 #include <dt-bindings/interrupt-controller/irq.h>
0056
0057 ps2 {
0058 compatible = "ps2-gpio";
0059 interrupt-parent = <&gpio>;
0060 interrupts = <23 IRQ_TYPE_EDGE_FALLING>;
0061 data-gpios = <&gpio 24 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
0062 clk-gpios = <&gpio 23 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
0063 write-enable;
0064 };
