Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml

   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
   7 title: Freescale Low Power SPI (LPSPI) for i.MX
   8
   9 maintainers:
  10   - Anson Huang <Anson.Huang@nxp.com>
  11
  12 allOf:
  13   - $ref: "/schemas/spi/spi-controller.yaml#"
  14
  15 properties:
  16   compatible:
  17     oneOf:
  18       - enum:
  19           - fsl,imx7ulp-spi
  20           - fsl,imx8qxp-spi
  21       - items:
  22           - const: fsl,imx8ulp-spi
  23           - const: fsl,imx7ulp-spi
  24   reg:
  25     maxItems: 1
  26
  27   interrupts:
  28     maxItems: 1
  29
  30   clocks:
  31     items:
  32       - description: SoC SPI per clock
  33       - description: SoC SPI ipg clock
  34
  35   clock-names:
  36     items:
  37       - const: per
  38       - const: ipg
  39
  40   fsl,spi-only-use-cs1-sel:
  41     description:
  42       spi common code does not support use of CS signals discontinuously.
  43       i.MX8DXL-EVK board only uses CS1 without using CS0. Therefore, add
  44       this property to re-config the chipselect value in the LPSPI driver.
  45     type: boolean
  46
  47 required:
  48   - compatible
  49   - reg
  50   - interrupts
  51   - clocks
  52   - clock-names
  53
  54 unevaluatedProperties: false
  55
  56 examples:
  57   - |
  58     #include <dt-bindings/clock/imx7ulp-clock.h>
  59     #include <dt-bindings/interrupt-controller/arm-gic.h>
  60
  61     spi@40290000 {
  62         compatible = "fsl,imx7ulp-spi";
  63         reg = <0x40290000 0x10000>;
  64         interrupt-parent = <&intc>;
  65         interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
  66         clocks = <&clks IMX7ULP_CLK_LPSPI2>,
  67                  <&clks IMX7ULP_CLK_DUMMY>;
  68         clock-names = "per", "ipg";
  69         spi-slave;
  70         fsl,spi-only-use-cs1-sel;
  71     };