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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/spi/spi-peripheral-props.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Peripheral-specific properties for a SPI bus.
description:
Many SPI controllers need to add properties to peripheral devices. They could
be common properties like spi-max-frequency, spi-cpha, etc. or they could be
controller specific like delay in clock or data lines, etc. These properties
need to be defined in the peripheral node because they are per-peripheral and
there can be multiple peripherals attached to a controller. All those
properties are listed here. The controller specific properties should go in
their own separate schema that should be referenced from here.
maintainers:
- Pratyush Yadav <p.yadav@ti.com>
properties:
reg:
minItems: 1
maxItems: 256
items:
items:
- minimum: 0
maximum: 256
description:
Chip select used by the device.
spi-3wire:
$ref: /schemas/types.yaml#/definitions/flag
description:
The device requires 3-wire mode.
spi-cpha:
$ref: /schemas/types.yaml#/definitions/flag
description:
The device requires shifted clock phase (CPHA) mode.
spi-cpol:
$ref: /schemas/types.yaml#/definitions/flag
description:
The device requires inverse clock polarity (CPOL) mode.
spi-cs-high:
$ref: /schemas/types.yaml#/definitions/flag
description:
The device requires the chip select active high.
spi-lsb-first:
$ref: /schemas/types.yaml#/definitions/flag
description:
The device requires the LSB first mode.
spi-max-frequency:
$ref: /schemas/types.yaml#/definitions/uint32
description:
Maximum SPI clocking speed of the device in Hz.
spi-rx-bus-width:
description:
Bus width to the SPI bus used for read transfers.
If 0 is provided, then no RX will be possible on this device.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1, 2, 4, 8]
default: 1
spi-rx-delay-us:
description:
Delay, in microseconds, after a read transfer.
spi-tx-bus-width:
description:
Bus width to the SPI bus used for write transfers.
If 0 is provided, then no TX will be possible on this device.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1, 2, 4, 8]
default: 1
spi-tx-delay-us:
description:
Delay, in microseconds, after a write transfer.
# The controller specific properties go here.
allOf:
- $ref: cdns,qspi-nor-peripheral-props.yaml#
additionalProperties: true
|
