arduino-mkr-header

Description

GPIO pins exposing on Arduino MKR headers.

The Arduino MKR layout provides two headers on both edges of the board.

* One side of the 14-pin header is analog inputs and digital signals.
  A1 to A6 is Analog input. The outside pin is AREF.
  A0 that is next to AREF used as a DAC output pin too.
  D0-D5 is a digital output.
* The other side 14-pin header is power supplies and peripheral interface.
  There are 5V and VCC power supply, GND, and RESET pin. UART, I2C,
  and SPI peripheral pins are also there. The end 2 pins are simple GPIO pins.

This binding provides a nexus mapping for 22 pins where parent pins 0
through 14 correspond to D0 through D21, and parent pins 15 through 21
correspond to A0 through A6, as depicted below.

    -  AREF                 5V       -
    15 A0/D15/DAC0          VIN      -
    16 A1/D16               VCC      -
    17 A2/D17               GND      -
    18 A3/D18               RESET    -
    19 A4/D19               D14/TX   14
    20 A5/D20               D13/RX   13
    21 A6/D21               D12/SCL  12
    0  D0                   D11/SDA  11
    1  D1                   D10/CPIO 10
    2  D2                   D9/SCK   0
    3  D3                   D8/COPI  8
    4  D4                   D7       7
    5  D5                   D6       6

Properties

Properties not inherited from the base binding file.

Name	Type	Details
`gpio-map`	`compound`	This property is required.
`gpio-map-mask`	`compound`
`gpio-map-pass-thru`	`compound`
`#gpio-cells`	`int`	Number of items to expect in a GPIO specifier This property is required.

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 “arduino-mkr-header” compatible.

Name	Type	Details
`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`	`array`	register space 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.
`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
`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.
`power-domain`	`phandle`	Power domain the device belongs to. The device will be notified when the power domain it belongs to is either suspended or resumed.