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   - Shawn Guo <shawnguo@kernel.org>
  11   - Sascha Hauer <s.hauer@pengutronix.de>
  12   - Fabio Estevam <festevam@gmail.com>
  13
  14 allOf:
  15   - $ref: /schemas/spi/spi-controller.yaml#
  16
  17 properties:
  18   compatible:
  19     oneOf:
  20       - enum:
  21           - fsl,imx7ulp-spi
  22           - fsl,imx8qxp-spi
  23       - items:
  24           - enum:
  25               - fsl,imx8ulp-spi
  26               - fsl,imx93-spi
  27               - fsl,imx95-spi
  28           - const: fsl,imx7ulp-spi
  29   reg:
  30     maxItems: 1
  31
  32   interrupts:
  33     maxItems: 1
  34
  35   clocks:
  36     items:
  37       - description: SoC SPI per clock
  38       - description: SoC SPI ipg clock
  39
  40   clock-names:
  41     items:
  42       - const: per
  43       - const: ipg
  44
  45   dmas:
  46     items:
  47       - description: TX DMA Channel
  48       - description: RX DMA Channel
  49
  50   dma-names:
  51     items:
  52       - const: tx
  53       - const: rx
  54
  55   fsl,spi-only-use-cs1-sel:
  56     description:
  57       spi common code does not support use of CS signals discontinuously.
  58       i.MX8DXL-EVK board only uses CS1 without using CS0. Therefore, add
  59       this property to re-config the chipselect value in the LPSPI driver.
  60     type: boolean
  61
  62   num-cs:
  63     description:
  64       number of chip selects.
  65     minimum: 1
  66     maximum: 2
  67     default: 1
  68
  69   power-domains:
  70     maxItems: 1
  71
  72 required:
  73   - compatible
  74   - reg
  75   - interrupts
  76   - clocks
  77   - clock-names
  78
  79 unevaluatedProperties: false
  80
  81 examples:
  82   - |
  83     #include <dt-bindings/clock/imx7ulp-clock.h>
  84     #include <dt-bindings/interrupt-controller/arm-gic.h>
  85
  86     spi@40290000 {
  87         compatible = "fsl,imx7ulp-spi";
  88         reg = <0x40290000 0x10000>;
  89         interrupt-parent = <&intc>;
  90         interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
  91         clocks = <&clks IMX7ULP_CLK_LPSPI2>,
  92                  <&clks IMX7ULP_CLK_DUMMY>;
  93         clock-names = "per", "ipg";
  94         spi-slave;
  95         fsl,spi-only-use-cs1-sel;
  96         num-cs = <2>;
  97     };