xref: /linux/Documentation/devicetree/bindings/spi/fsl,espi.yaml (revision bbfd5594756011167b8f8de9a00e0c946afda1e6)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/spi/fsl,espi.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Freescale eSPI (Enhanced Serial Peripheral Interface) controller

maintainers:
  - J. Neuschäfer <j.ne@posteo.net>

properties:
  compatible:
    const: fsl,mpc8536-espi

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  fsl,espi-num-chipselects:
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [ 1, 4 ]
    description: The number of the chipselect signals.

  fsl,csbef:
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 15
    description: Chip select assertion time in bits before frame starts

  fsl,csaft:
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 15
    description: Chip select negation time in bits after frame ends

required:
  - compatible
  - reg
  - interrupts
  - fsl,espi-num-chipselects

allOf:
  - $ref: spi-controller.yaml#

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/irq.h>

    spi@110000 {
        compatible = "fsl,mpc8536-espi";
        reg = <0x110000 0x1000>;
        #address-cells = <1>;
        #size-cells = <0>;
        interrupts = <53 IRQ_TYPE_EDGE_FALLING>;
        fsl,espi-num-chipselects = <4>;
        fsl,csbef = <1>;
        fsl,csaft = <1>;
    };

...