atmel,sam-spi

Description

These nodes are “spi” bus nodes.

Atmel SAM SPI controller

Properties

Properties not inherited from the base binding file.

Name	Type	Details
`peripheral-id`	`int`	peripheral ID This property is required.
`loopback`	`boolean`	Connects TX to RX internally creating a loop back connection. Useful for testing.
`clock-frequency`	`int`	Clock frequency the SPI peripheral is being driven at, in Hz.
`cs-gpios`	`phandle-array`	An array of chip select GPIOs to use. Each element in the array specifies a GPIO. The index in the array corresponds to the child node that the CS gpio controls. Example: spi@... { cs-gpios = <&gpio0 23 GPIO_ACTIVE_LOW>, <&gpio1 10 GPIO_ACTIVE_LOW>, ...; spi-device@0 { reg = <0>; ... }; spi-device@1 { reg = <1>; ... }; ... }; The child node "spi-device@0" specifies a SPI device with chip select controller gpio0, pin 23, and devicetree GPIO flags GPIO_ACTIVE_LOW. Similarly, "spi-device@1" has CS GPIO controller gpio1, pin 10, and flags GPIO_ACTIVE_LOW. Additional devices can be configured in the same way. If unsure about the flags cell, GPIO_ACTIVE_LOW is generally a safe choice for a typical "CSn" pin. GPIO_ACTIVE_HIGH may be used if intervening hardware inverts the signal to the peripheral device or the line itself is active high. If this property is not defined, no chip select GPIOs are set. SPI controllers with dedicated CS pins do not need to define the cs-gpios property.
`pinctrl-0`	`phandles`	Pin configuration/s for the first state. Content is specific to the selected pin controller driver implementation.
`pinctrl-1`	`phandles`	Pin configuration/s for the second state. See pinctrl-0.
`pinctrl-2`	`phandles`	Pin configuration/s for the third state. See pinctrl-0.
`pinctrl-3`	`phandles`	Pin configuration/s for the fourth state. See pinctrl-0.
`pinctrl-4`	`phandles`	Pin configuration/s for the fifth state. See pinctrl-0.
`pinctrl-names`	`string-array`	Names for the provided states. The number of names needs to match the number of states.

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 “atmel,sam-spi” compatible.

Name	Type	Details
`reg`	`array`	register space This property is required. See Important properties for more information.
`interrupts`	`array`	interrupts for device This property is required. See Important properties for more information.
`dmas`	`phandle-array`	TX & RX dma specifiers. Each specifier will have a phandle reference to the dma controller, the channel number, and peripheral trigger source. The channel number is arbitrary but must not be reused. The number of channels available is device dependent. For example dmas for TX and RX may look like dmas = <&xdmac 1 DMA_PERID_SPI0_TX>, <&xdmac 2 DMA_PERID_SPI0_RX>;
`dma-names`	`string-array`	This should be "tx" and "rx" and should match the order given for dmas. For example using the example dmas, an example dma-names would be dma-names = "tx", "rx";
`#address-cells`	`int`	number of address cells in reg property This property is required. Constant value: `1`
`#size-cells`	`int`	number of size cells in reg property This property is required.
`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-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
`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.