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     enum:
  18       - fsl,imx7ulp-spi
  19       - fsl,imx8qxp-spi
  20
  21   reg:
  22     maxItems: 1
  23
  24   interrupts:
  25     maxItems: 1
  26
  27   clocks:
  28     items:
  29       - description: SoC SPI per clock
  30       - description: SoC SPI ipg clock
  31
  32   clock-names:
  33     items:
  34       - const: per
  35       - const: ipg
  36
  37   fsl,spi-only-use-cs1-sel:
  38     description:
  39       spi common code does not support use of CS signals discontinuously.
  40       i.MX8DXL-EVK board only uses CS1 without using CS0. Therefore, add
  41       this property to re-config the chipselect value in the LPSPI driver.
  42
  43 required:
  44   - compatible
  45   - reg
  46   - interrupts
  47   - clocks
  48   - clock-names
  49
  50 unevaluatedProperties: false
  51
  52 examples:
  53   - |
  54     #include <dt-bindings/clock/imx7ulp-clock.h>
  55     #include <dt-bindings/interrupt-controller/arm-gic.h>
  56
  57     spi@40290000 {
  58         compatible = "fsl,imx7ulp-spi";
  59         reg = <0x40290000 0x10000>;
  60         interrupt-parent = <&intc>;
  61         interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
  62         clocks = <&clks IMX7ULP_CLK_LPSPI2>,
  63                  <&clks IMX7ULP_CLK_DUMMY>;
  64         clock-names = "per", "ipg";
  65         spi-slave;
  66         fsl,spi-only-use-cs1-sel;
  67     };