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
  7title: Freescale Low Power SPI (LPSPI) for i.MX
  8
  9maintainers:
 10  - Shawn Guo <shawnguo@kernel.org>
 11  - Sascha Hauer <s.hauer@pengutronix.de>
 12  - Fabio Estevam <festevam@gmail.com>
 13
 14allOf:
 15  - $ref: /schemas/spi/spi-controller.yaml#
 16
 17properties:
 18  compatible:
 19    oneOf:
 20      - enum:
 21          - fsl,imx7ulp-spi
 22          - fsl,imx8qxp-spi
 23          - nxp,s32g2-lpspi
 24      - items:
 25          - enum:
 26              - fsl,imx8ulp-spi
 27              - fsl,imx93-spi
 28              - fsl,imx94-spi
 29              - fsl,imx95-spi
 30          - const: fsl,imx7ulp-spi
 31      - items:
 32          - const: nxp,s32g3-lpspi
 33          - const: nxp,s32g2-lpspi
 34
 35  reg:
 36    maxItems: 1
 37
 38  interrupts:
 39    maxItems: 1
 40
 41  clocks:
 42    items:
 43      - description: SoC SPI per clock
 44      - description: SoC SPI ipg clock
 45
 46  clock-names:
 47    items:
 48      - const: per
 49      - const: ipg
 50
 51  dmas:
 52    items:
 53      - description: TX DMA Channel
 54      - description: RX DMA Channel
 55
 56  dma-names:
 57    items:
 58      - const: tx
 59      - const: rx
 60
 61  fsl,spi-only-use-cs1-sel:
 62    description:
 63      spi common code does not support use of CS signals discontinuously.
 64      i.MX8DXL-EVK board only uses CS1 without using CS0. Therefore, add
 65      this property to re-config the chipselect value in the LPSPI driver.
 66    type: boolean
 67
 68  num-cs:
 69    description:
 70      number of chip selects.
 71    minimum: 1
 72    maximum: 2
 73    default: 1
 74
 75  power-domains:
 76    maxItems: 1
 77
 78required:
 79  - compatible
 80  - reg
 81  - interrupts
 82  - clocks
 83  - clock-names
 84
 85unevaluatedProperties: false
 86
 87examples:
 88  - |
 89    #include <dt-bindings/clock/imx7ulp-clock.h>
 90    #include <dt-bindings/interrupt-controller/arm-gic.h>
 91
 92    spi@40290000 {
 93        compatible = "fsl,imx7ulp-spi";
 94        reg = <0x40290000 0x10000>;
 95        interrupt-parent = <&intc>;
 96        interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
 97        clocks = <&clks IMX7ULP_CLK_LPSPI2>,
 98                 <&clks IMX7ULP_CLK_DUMMY>;
 99        clock-names = "per", "ipg";
100        spi-slave;
101        fsl,spi-only-use-cs1-sel;
102        num-cs = <2>;
103    };