adi,max14906-gpio (on spi bus)

Vendor: Analog Devices, Inc.

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.

Node specific properties

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.

Deprecated node specific properties

Deprecated properties not inherited from the base binding file.

(None)

Base properties

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

 
Information used to address the device. The value is specific to
the device (i.e. is different depending on the compatible
property).

The "reg" property is typically a sequence of (address, length) pairs.
Each pair is called a "register block". Values are
conventionally written in hex.

For details, see "2.3.6 reg" in Devicetree Specification v0.4.

This property is required.

See Important properties for more information.

status

string

 
Indicates the operational status of the hardware or other
resource that the node represents. In particular:

  - "okay" means the resource is operational and, for example,
    can be used by device drivers
  - "disabled" means the resource is not operational and the system
    should treat it as if it is not present

For details, see "2.3.4 status" in Devicetree Specification v0.4.

Legal values: 'ok', 'okay', 'disabled', 'reserved', 'fail', 'fail-sss'

See Important properties for more information.

compatible

string-array

 
This property is a list of strings that essentially define what
type of hardware or other resource this devicetree node
represents. Each device driver checks for specific compatible
property values to find the devicetree nodes that represent
resources that the driver should manage.

The recommended format is "vendor,device", The "vendor" part is
an abbreviated name of the vendor. The "device" is usually from
the datasheet.

The compatible property can have multiple values, ordered from
most- to least-specific. Having additional values is useful when the
device is a specific instance of a more general family, to allow the
system to match the most specific driver available.

For details, see "2.3.1 compatible" in Devicetree Specification v0.4.

This property is required.

See Important properties for more information.

reg-names

string-array

 
Optional names given to each register block in the "reg" property.
For example:

  / {
       soc {
           #address-cells = <1>;
           #size-cells = <1>;

           uart@1000 {
               reg = <0x1000 0x2000>, <0x3000 0x4000>;
               reg-names = "foo", "bar";
           };
       };
  };

The uart@1000 node has two register blocks:

  - one with base address 0x1000, size 0x2000, and name "foo"
  - another with base address 0x3000, size 0x4000, and name "bar"

interrupts

array

 
Information about interrupts generated by the device, encoded as an array
of one or more interrupt specifiers. The format of the data in this property
varies by where the device appears in the interrupt tree. Devices with the same
"interrupt-parent" will use the same format in their interrupts properties.

For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.

See Important properties for more information.

interrupts-extended

compound

 
Extended interrupt specifier for device, used as an alternative to
the "interrupts" property.

For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.

interrupt-names

string-array

 
Optional names given to each interrupt generated by a device.
The interrupts themselves are defined in either "interrupts" or
"interrupts-extended" properties.

For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.

interrupt-parent

phandle

 
If present, this refers to the node which handles interrupts generated
by this device.

For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.

label

string

 
Human readable string describing the device. Use of this property is
deprecated except as needed on a case-by-case basis.

For details, see "4.1.2 Miscellaneous Properties" in Devicetree
Specification v0.4.

See Important properties for more information.

clocks

phandle-array

 
Information about the device's clock providers. In general, this property
should follow conventions established in the dt-schema binding:

  https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/clock/clock.yaml

clock-names

string-array

 
Optional names given to each clock provider in the "clocks" property.

#address-cells

int

 
This property encodes the number of <u32> cells used by address fields
in "reg" properties in this node's children.

For details, see "2.3.5 #address-cells and #size-cells" in Devicetree
Specification v0.4.

#size-cells

int

 
This property encodes the number of <u32> cells used by size fields in
"reg" properties in this node's children.

For details, see "2.3.5 #address-cells and #size-cells" in Devicetree
Specification v0.4.

dmas

phandle-array

 
DMA channel specifiers relevant to the device.

dma-names

string-array

 
Optional names given to the DMA channel specifiers in the "dmas" property.

io-channels

phandle-array

 
IO channel specifiers relevant to the device.

io-channel-names

string-array

 
Optional names given to the IO channel specifiers in the "io-channels" property.

mboxes

phandle-array

 
Mailbox / IPM channel specifiers relevant to the device.

mbox-names

string-array

 
Optional names given to the mbox specifiers in the "mboxes" property.

power-domains

phandle-array

 
Power domain specifiers relevant to the device.

power-domain-names

string-array

 
Optional names given to the power domain specifiers in the "power-domains" property.

#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