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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/gpio/maxim,max31910.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Maxim MAX3191x GPIO serializer
maintainers:
- Lukas Wunner <lukas@wunner.de>
properties:
compatible:
enum:
- maxim,max31910
- maxim,max31911
- maxim,max31912
- maxim,max31913
- maxim,max31953
- maxim,max31963
reg:
maxItems: 1
gpio-controller: true
'#gpio-cells':
const: 2
'#daisy-chained-devices':
description: Number of chips in the daisy-chain.
default: 1
maxim,modesel-gpios:
description:
GPIO pins to configure modesel of each chip. The number of GPIOs must
equal "#daisy-chained-devices" (if each chip is driven by a separate pin)
or 1 (if all chips are wired to the same pin).
maxim,fault-gpios:
description:
GPIO pins to read fault of each chip. The number of GPIOs must equal
"#daisy-chained-devices" or 1.
maxim,db0-gpios:
description:
GPIO pins to configure debounce of each chip. The number of GPIOs must
equal "#daisy-chained-devices" or 1.
maxim,db1-gpios:
description:
GPIO pins to configure debounce of each chip. The number of GPIOs must
equal "maxim,db0-gpios".
maxim,modesel-8bit:
description:
Boolean whether the modesel pin of the chips is pulled high (8-bit mode).
Use this if the modesel pin is hardwired and consequently
"maxim,modesel-gpios" cannot be specified. By default if neither this nor
"maxim,modesel-gpios" is given, the driver assumes that modesel is pulled
low (16-bit mode).
type: boolean
maxim,ignore-undervoltage:
description:
Boolean whether to ignore undervoltage alarms signaled by the
"maxim,fault-gpios" or by the status byte (in 16-bit mode). Use this if
the chips are powered through 5VOUT instead of VCC24V, in which case they
will constantly signal undervoltage.
type: boolean
required:
- compatible
- reg
- gpio-controller
- '#gpio-cells'
allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
spi {
#address-cells = <1>;
#size-cells = <0>;
gpio@0 {
compatible = "maxim,max31913";
reg = <0>;
gpio-controller;
#gpio-cells = <2>;
maxim,modesel-gpios = <&gpio2 23>;
maxim,fault-gpios = <&gpio2 24 GPIO_ACTIVE_LOW>;
maxim,db0-gpios = <&gpio2 25>;
maxim,db1-gpios = <&gpio2 26>;
spi-max-frequency = <25000000>;
};
};
|
