xref: /linux/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml (revision 5add703f6acad1c63f8a532b6de56e50d548e904) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/spi/spi-fsl-lpspi.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Freescale Low Power SPI (LPSPI) for i.MX
8
9maintainers:
10  - Anson Huang <Anson.Huang@nxp.com>
11
12allOf:
13  - $ref: /schemas/spi/spi-controller.yaml#
14
15properties:
16  compatible:
17    oneOf:
18      - enum:
19          - fsl,imx7ulp-spi
20          - fsl,imx8qxp-spi
21      - items:
22          - enum:
23              - fsl,imx8ulp-spi
24              - fsl,imx93-spi
25              - fsl,imx95-spi
26          - const: fsl,imx7ulp-spi
27  reg:
28    maxItems: 1
29
30  interrupts:
31    maxItems: 1
32
33  clocks:
34    items:
35      - description: SoC SPI per clock
36      - description: SoC SPI ipg clock
37
38  clock-names:
39    items:
40      - const: per
41      - const: ipg
42
43  dmas:
44    items:
45      - description: TX DMA Channel
46      - description: RX DMA Channel
47
48  dma-names:
49    items:
50      - const: tx
51      - const: rx
52
53  fsl,spi-only-use-cs1-sel:
54    description:
55      spi common code does not support use of CS signals discontinuously.
56      i.MX8DXL-EVK board only uses CS1 without using CS0. Therefore, add
57      this property to re-config the chipselect value in the LPSPI driver.
58    type: boolean
59
60  num-cs:
61    description:
62      number of chip selects.
63    minimum: 1
64    maximum: 2
65    default: 1
66
67  power-domains:
68    maxItems: 1
69
70required:
71  - compatible
72  - reg
73  - interrupts
74  - clocks
75  - clock-names
76
77unevaluatedProperties: false
78
79examples:
80  - |
81    #include <dt-bindings/clock/imx7ulp-clock.h>
82    #include <dt-bindings/interrupt-controller/arm-gic.h>
83
84    spi@40290000 {
85        compatible = "fsl,imx7ulp-spi";
86        reg = <0x40290000 0x10000>;
87        interrupt-parent = <&intc>;
88        interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
89        clocks = <&clks IMX7ULP_CLK_LPSPI2>,
90                 <&clks IMX7ULP_CLK_DUMMY>;
91        clock-names = "per", "ipg";
92        spi-slave;
93        fsl,spi-only-use-cs1-sel;
94        num-cs = <2>;
95    };
96