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-GPIO driver for Maxim MAX3191x industrial serializer
-
-Required properties:
- - compatible: Must be one of:
- "maxim,max31910"
- "maxim,max31911"
- "maxim,max31912"
- "maxim,max31913"
- "maxim,max31953"
- "maxim,max31963"
- - reg: Chip select number.
- - gpio-controller: Marks the device node as a GPIO controller.
- - #gpio-cells: Should be two. For consumer use see gpio.txt.
-
-Optional properties:
- - #daisy-chained-devices:
- Number of chips in the daisy-chain (default is 1).
- - maxim,modesel-gpios: 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: GPIO pins to read fault of each chip.
- The number of GPIOs must equal "#daisy-chained-devices"
- or 1.
- - maxim,db0-gpios: GPIO pins to configure debounce of each chip.
- The number of GPIOs must equal "#daisy-chained-devices"
- or 1.
- - maxim,db1-gpios: GPIO pins to configure debounce of each chip.
- The number of GPIOs must equal "maxim,db0-gpios".
- - maxim,modesel-8bit: 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).
- - maxim,ignore-undervoltage:
- 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.
-
-For other required and optional properties of SPI slave nodes please refer to
-../spi/spi-bus.txt.
-
-Example:
- 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>;
- };