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dt-bindings: gpio: Convert maxim,max3191x to DT schema
Convert the Maxim MAX3191x and similar GPIO binding to DT schema format. It's a straight forward conversion. Signed-off-by: Rob Herring (Arm) <robh@kernel.org> Reviewed-by: Lukas Wunner <lukas@wunner.de> Link: https://lore.kernel.org/r/20250714202843.3011698-1-robh@kernel.org Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Rob Herring (Arm)
Bartosz Golaszewski
parent
e2337e64fc
commit
07e858e7e1
2 changed files with 104 additions and 59 deletions
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GPIO driver for Maxim MAX3191x industrial serializer
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Required properties:
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- compatible: Must be one of:
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"maxim,max31910"
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"maxim,max31911"
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"maxim,max31912"
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"maxim,max31913"
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"maxim,max31953"
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"maxim,max31963"
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- reg: Chip select number.
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- gpio-controller: Marks the device node as a GPIO controller.
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- #gpio-cells: Should be two. For consumer use see gpio.txt.
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Optional properties:
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- #daisy-chained-devices:
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Number of chips in the daisy-chain (default is 1).
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- maxim,modesel-gpios: GPIO pins to configure modesel of each chip.
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The number of GPIOs must equal "#daisy-chained-devices"
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(if each chip is driven by a separate pin) or 1
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(if all chips are wired to the same pin).
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- maxim,fault-gpios: GPIO pins to read fault of each chip.
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The number of GPIOs must equal "#daisy-chained-devices"
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or 1.
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- maxim,db0-gpios: GPIO pins to configure debounce of each chip.
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The number of GPIOs must equal "#daisy-chained-devices"
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or 1.
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- maxim,db1-gpios: GPIO pins to configure debounce of each chip.
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The number of GPIOs must equal "maxim,db0-gpios".
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- maxim,modesel-8bit: Boolean whether the modesel pin of the chips is
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pulled high (8-bit mode). Use this if the modesel pin
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is hardwired and consequently "maxim,modesel-gpios"
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cannot be specified. By default if neither this nor
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"maxim,modesel-gpios" is given, the driver assumes
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that modesel is pulled low (16-bit mode).
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- maxim,ignore-undervoltage:
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Boolean whether to ignore undervoltage alarms signaled
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by the "maxim,fault-gpios" or by the status byte
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(in 16-bit mode). Use this if the chips are powered
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through 5VOUT instead of VCC24V, in which case they
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will constantly signal undervoltage.
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For other required and optional properties of SPI slave nodes please refer to
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../spi/spi-bus.txt.
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Example:
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gpio@0 {
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compatible = "maxim,max31913";
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reg = <0>;
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gpio-controller;
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#gpio-cells = <2>;
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maxim,modesel-gpios = <&gpio2 23>;
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maxim,fault-gpios = <&gpio2 24 GPIO_ACTIVE_LOW>;
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maxim,db0-gpios = <&gpio2 25>;
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maxim,db1-gpios = <&gpio2 26>;
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spi-max-frequency = <25000000>;
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};
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104
Documentation/devicetree/bindings/gpio/maxim,max31910.yaml
Normal file
104
Documentation/devicetree/bindings/gpio/maxim,max31910.yaml
Normal file
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/gpio/maxim,max31910.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Maxim MAX3191x GPIO serializer
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maintainers:
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- Lukas Wunner <lukas@wunner.de>
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properties:
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compatible:
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enum:
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- maxim,max31910
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- maxim,max31911
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- maxim,max31912
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- maxim,max31913
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- maxim,max31953
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- maxim,max31963
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reg:
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maxItems: 1
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gpio-controller: true
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'#gpio-cells':
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const: 2
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'#daisy-chained-devices':
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description: Number of chips in the daisy-chain.
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default: 1
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maxim,modesel-gpios:
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description:
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GPIO pins to configure modesel of each chip. The number of GPIOs must
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equal "#daisy-chained-devices" (if each chip is driven by a separate pin)
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or 1 (if all chips are wired to the same pin).
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maxim,fault-gpios:
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description:
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GPIO pins to read fault of each chip. The number of GPIOs must equal
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"#daisy-chained-devices" or 1.
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maxim,db0-gpios:
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description:
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GPIO pins to configure debounce of each chip. The number of GPIOs must
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equal "#daisy-chained-devices" or 1.
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maxim,db1-gpios:
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description:
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GPIO pins to configure debounce of each chip. The number of GPIOs must
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equal "maxim,db0-gpios".
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maxim,modesel-8bit:
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description:
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Boolean whether the modesel pin of the chips is pulled high (8-bit mode).
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Use this if the modesel pin is hardwired and consequently
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"maxim,modesel-gpios" cannot be specified. By default if neither this nor
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"maxim,modesel-gpios" is given, the driver assumes that modesel is pulled
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low (16-bit mode).
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type: boolean
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maxim,ignore-undervoltage:
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description:
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Boolean whether to ignore undervoltage alarms signaled by the
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"maxim,fault-gpios" or by the status byte (in 16-bit mode). Use this if
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the chips are powered through 5VOUT instead of VCC24V, in which case they
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will constantly signal undervoltage.
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type: boolean
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required:
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- compatible
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- reg
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- gpio-controller
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- '#gpio-cells'
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allOf:
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- $ref: /schemas/spi/spi-peripheral-props.yaml#
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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gpio@0 {
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compatible = "maxim,max31913";
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reg = <0>;
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gpio-controller;
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#gpio-cells = <2>;
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maxim,modesel-gpios = <&gpio2 23>;
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maxim,fault-gpios = <&gpio2 24 GPIO_ACTIVE_LOW>;
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maxim,db0-gpios = <&gpio2 25>;
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maxim,db1-gpios = <&gpio2 26>;
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spi-max-frequency = <25000000>;
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};
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};
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