adi,max14906-gpio (on spi bus)

Note

An implementation of a driver matching this compatible is available in drivers/gpio/gpio_max14906.c.

Description

ADI MAX14906 quad industrial Input/Output with advanced diagnostics

Properties

Top level properties

These property descriptions apply to “adi,max14906-gpio” nodes themselves. This page also describes child node properties in the following sections.

Properties not inherited from the base binding file.

Name	Type	Details
`#gpio-cells`	`int`	Number of items to expect in a GPIO specifier This property is required. Constant value: `2`
`ngpios`	`int`	Number of gpios supported This property is required. Default value: `32` Constant value: `4`
`drdy-gpios`	`phandle-array`	High-Side Open-Drain Output. READY is passive low when the internal logic supply is higher than the UVLO threshold, indicating that the registers have adequate supply voltage.
`fault-gpios`	`phandle-array`	Fault pin indicates when there is Fault state in either FAULT1 or FAULT2 bothe of which are cleaned on read once problem is not persistent.
`sync-gpios`	`phandle-array`	Latch the data so it could be read (partially duplicate CS).
`en-gpios`	`phandle-array`	DOI Enable Pin. Drive the EN pin high to enable the DOI_ outputs. Drive EN low to disable/three-state all DOI_ outputs.
`crc-en`	`boolean`	Notify driver if crc pin is enabled.
`spi-addr`	`int`	On MAX14906PMB module default address is 0 (A0-LOW, A1-LOW) Selectable device address, configurable from A0 and A1 This property is required. Legal values: `0`, `1`, `2`, `3`
`ow-en`	`array`	Default values are from documentation. Enable or disable open-wire functionality per channel. - 0 mean disable - 1 mean enable channels indentation start from CH0...CH3 Default value: `[0, 0, 0, 0]`
`vdd-ov-en`	`array`	Default values are from documentation. VDDOVEN Enable or disable open-wire functionality per channel. - 0 mean disable - 1 mean enable channels indentation start from CH0...CH3 Default value: `[0, 0, 0, 0]`
`gdrv-en`	`array`	Default values are from documentation. GDrvEn - Gate drive enabl disable for power eff Enable or disable open-wire functionality per channel. - 0 mean disable - 1 mean enable channels indentation start from CH0...CH3 Default value: `[0, 0, 0, 0]`
`sh-vdd-en`	`array`	Default values are from documentation. ShVddEN - Short to VDD enable Enable or disable short to VDD functionality per channel. - 0 mean disable - 1 mean enable channels indentation start from CH0...CH3 Default value: `[0, 0, 0, 0]`
`fled-set`	`boolean`	Internal fault diagnostics include (if enabled): SafeDemagF_, SHVDD_, VDDOV_, OWOff_, AboveVDD_, CL_, OVL_, VDDOKFault_.
`sled-set`	`boolean`	Enable status LEDs
`fled-stretch`	`int`	Default values are from documentation. Set minimum on time for FLEDs in case of fault 0 - Disable minimum fault LED (FLED) on-time 1 - Minimum fault LED (FLED) on-time = 1s (typ) 2 - Minimum fault LED (FLED) on-time = 2s (typ) 3 - Minimum fault LED (FLED) on-time = 3s (typ) Legal values: `0`, `1`, `2`, `3`
`ffilter-en`	`boolean`	When the fault LEDs (FLEDs) are controlled internally (FLEDSet = 0), open- wire and short-to-V DD diagnostics always use filtering and cannot be disabled by the FFilterEn bit.
`filter-long`	`boolean`	false: To select regular blanking time (4ms, typ) for diagnostic fault bits, OWOff_ and SHVDD_ true: To select long blanking time (8ms, typ) for diagnostic fault bits, OWOff_ and SHVDD_
`flatch-en`	`boolean`	false: Disable latching of diagnostic fault bits in the OvrLdChF, OpnWirChF, and ShtVDDChF registers true: Enable latching of diagnostic fault bits in the OvrLdChF, OpnWirChF, and ShtVDDChF registers
`led-cur-lim`	`boolean`	false: Disable fault LEDs (FLEDs) signaling current limit true: Enable fault LEDs (FLEDs) signaling current limit
`vdd-on-thr`	`boolean`	Enable higher voltage thresholds for VDD and VDD_ undervoltage monitoring
`synch-wd-en`	`boolean`	The SYNCH watchdog timeout is defined by the WDTo[1:0] bits if the SPI watchdog is enabled. When WDTo[1:0] = 00 (SPI watchdog disabled), the SYNCH watchdog timeout is 600ms (typ) if enabled.
`sht-vdd-thr`	`int`	Default values are from documentation. Set threshold voltage for short-to-V DD detection 0: Set threshold voltage for short-to-VDD detection to 9V (typ) 1: Set threshold voltage for short-to-VDD detection to 10V (typ) 2: Set threshold voltage for short-to-VDD detection to 12V (typ) 3: Set threshold voltage for short-to-VDD detection to 14V (typ) Legal values: `0`, `1`, `2`, `3`
`ow-off-cs`	`int`	Default values are from documentation. Set the pullup current for open-wire and short-to-VDD detection 0: Set open-wire and short-to-VDD detection current to 60μA (typ) 1: Set open-wire and short-to-VDD detection current to 100μA (typ) 2: Set open-wire and short-to-VDD detection current to 300μA (typ) 3: Set open-wire and short-to-VDD detection current to 600μA (typ) Legal values: `0`, `1`, `2`, `3`
`wd-to`	`int`	Default values are from documentation. SPI Watchdog Status, set SPI and SYNCH Watchdog Timeout 0: Disable SPI Watchdog Status and SPI Watchdog Timeout 1: Enable SPI Watchdog Status, set SPI and SYNCH Watchdog Timeout to 200ms (typ) 2: Enable SPI Watchdog Status, set SPI and SYNCH Watchdog Timeout to 600ms (typ) 3: Enable SPI Watchdog Status, set SPI and SYNCH Watchdog Timeout to 1.2s (typ) Legal values: `0`, `1`, `2`, `3`
`gpio-controller`	`boolean`	Convey's this node is a GPIO controller This property is required.
`gpio-reserved-ranges`	`array`	If not all the GPIOs at offsets 0...N-1 are usable for ngpios = <N>, then this property contains an additional set of tuples which specify which GPIOs are unusable. This property indicates the start and size of the GPIOs that can't be used. For example, setting "gpio-reserved-ranges = <3 2>, <10 1>;" means that GPIO offsets 3, 4, and 10 are not usable, even if ngpios = <18>.
`gpio-line-names`	`string-array`	This is an array of strings defining the names of the GPIO lines going out of the GPIO controller
`spi-max-frequency`	`int`	Maximum clock frequency of device's SPI interface in Hz This property is required.
`duplex`	`int`	Duplex mode, full or half. By default it's always full duplex thus 0 as this is, by far, the most common mode. Use the macros not the actual enum value, here is the concordance list (see dt-bindings/spi/spi.h) 0 SPI_FULL_DUPLEX 2048 SPI_HALF_DUPLEX Legal values: `0`, `2048`
`frame-format`	`int`	Motorola or TI frame format. By default it's always Motorola's, thus 0 as this is, by far, the most common format. Use the macros not the actual enum value, here is the concordance list (see dt-bindings/spi/spi.h) 0 SPI_FRAME_FORMAT_MOTOROLA 32768 SPI_FRAME_FORMAT_TI Legal values: `0`, `32768`
`spi-cpol`	`boolean`	SPI clock polarity which indicates the clock idle state. If it is used, the clock idle state is logic high; otherwise, low.
`spi-cpha`	`boolean`	SPI clock phase that indicates on which edge data is sampled. If it is used, data is sampled on the second edge; otherwise, on the first edge.
`spi-hold-cs`	`boolean`	In some cases, it is necessary for the master to manage SPI chip select under software control, so that multiple spi transactions can be performed without releasing it. A typical use case is variable length SPI packets where the first spi transaction reads the length and the second spi transaction reads length bytes.
`supply-gpios`	`phandle-array`	GPIO specifier that controls power to the device. This property should be provided when the device has a dedicated switch that controls power to the device. The supply state is entirely the responsibility of the device driver. Contrast with vin-supply.
`vin-supply`	`phandle`	Reference to the regulator that controls power to the device. The referenced devicetree node must have a regulator compatible. This property should be provided when device power is supplied by a shared regulator. The supply state is dependent on the request status of all devices fed by the regulator. Contrast with supply-gpios. If both properties are provided then the regulator must be requested before the supply GPIOS is set to an active state, and the supply GPIOS must be set to an inactive state before releasing the regulator.

Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “adi,max14906-gpio” compatible.

Name	Type	Details
`reg`	`array`	register space This property is required. See Important properties for more information.
`status`	`string`	indicates the operational status of a device Legal values: `'ok'`, `'okay'`, `'disabled'`, `'reserved'`, `'fail'`, `'fail-sss'` See Important properties for more information.
`compatible`	`string-array`	compatible strings This property is required. See Important properties for more information.
`reg-names`	`string-array`	name of each register space
`interrupts`	`array`	interrupts for device See Important properties for more information.
`interrupts-extended`	`compound`	extended interrupt specifier for device
`interrupt-names`	`string-array`	name of each interrupt
`interrupt-parent`	`phandle`	phandle to interrupt controller node
`label`	`string`	Human readable string describing the device (used as device_get_binding() argument) See Important properties for more information. This property is deprecated.
`clocks`	`phandle-array`	Clock gate information
`clock-names`	`string-array`	name of each clock
`#address-cells`	`int`	number of address cells in reg property
`#size-cells`	`int`	number of size cells in reg property
`dmas`	`phandle-array`	DMA channels specifiers
`dma-names`	`string-array`	Provided names of DMA channel specifiers
`io-channels`	`phandle-array`	IO channels specifiers
`io-channel-names`	`string-array`	Provided names of IO channel specifiers
`mboxes`	`phandle-array`	mailbox / IPM channels specifiers
`mbox-names`	`string-array`	Provided names of mailbox / IPM channel specifiers
`power-domains`	`phandle-array`	Power domain specifiers
`power-domain-names`	`string-array`	Provided names of power domain specifiers
`#power-domain-cells`	`int`	Number of cells in power-domains property
`zephyr,deferred-init`	`boolean`	Do not initialize device automatically on boot. Device should be manually initialized using device_init().
`wakeup-source`	`boolean`	Property to identify that a device can be used as wake up source. When this property is provided a specific flag is set into the device that tells the system that the device is capable of wake up the system. Wake up capable devices are disabled (interruptions will not wake up the system) by default but they can be enabled at runtime if necessary.
`zephyr,pm-device-runtime-auto`	`boolean`	Automatically configure the device for runtime power management after the init function runs.
`zephyr,disabling-power-states`	`phandles`	List of power states that will disable this device power.

Child node properties

Name	Type	Details
`gpio-hog`	`boolean`	Conveys this node is a GPIO hog. This property is required.
`gpios`	`array`	This is an array of GPIO specifiers (e.g. pin, flags) to be hogged. The number of array entries must be an integer multiple of the number of GPIO specifier cells for the parent GPIO controller. This property is required.
`input`	`boolean`	If this property is set, the GPIO is configured as an input. This property takes precedence over the output-low and output-high properties.
`output-low`	`boolean`	If this property is set, the GPIO is configured as an output set to logical low. This property takes precedence over the output-high property.
`output-high`	`boolean`	If this property is set, the GPIO is configured as an output set to logical high.
`line-name`	`string`	Optional GPIO line name.

Specifier cell names

gpio cells: pin, flags