| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | - enum: |
| 23 | - fsl,imx8ulp-spi |
| 24 | - fsl,imx93-spi |
| 25 | - const: fsl,imx7ulp-spi |
| 26 | reg: |
| 27 | maxItems: 1 |
| 28 | |
| 29 | interrupts: |
| 30 | maxItems: 1 |
| 31 | |
| 32 | clocks: |
| 33 | items: |
| 34 | - description: SoC SPI per clock |
| 35 | - description: SoC SPI ipg clock |
| 36 | |
| 37 | clock-names: |
| 38 | items: |
| 39 | - const: per |
| 40 | - const: ipg |
| 41 | |
| 42 | dmas: |
| 43 | items: |
| 44 | - description: TX DMA Channel |
| 45 | - description: RX DMA Channel |
| 46 | |
| 47 | dma-names: |
| 48 | items: |
| 49 | - const: tx |
| 50 | - const: rx |
| 51 | |
| 52 | fsl,spi-only-use-cs1-sel: |
| 53 | description: |
| 54 | spi common code does not support use of CS signals discontinuously. |
| 55 | i.MX8DXL-EVK board only uses CS1 without using CS0. Therefore, add |
| 56 | this property to re-config the chipselect value in the LPSPI driver. |
| 57 | type: boolean |
| 58 | |
| 59 | num-cs: |
| 60 | description: |
| 61 | number of chip selects. |
| 62 | minimum: 1 |
| 63 | maximum: 2 |
| 64 | default: 1 |
| 65 | |
| 66 | power-domains: |
| 67 | maxItems: 1 |
| 68 | |
| 69 | required: |
| 70 | - compatible |
| 71 | - reg |
| 72 | - interrupts |
| 73 | - clocks |
| 74 | - clock-names |
| 75 | |
| 76 | unevaluatedProperties: false |
| 77 | |
| 78 | examples: |
| 79 | - | |
| 80 | #include <dt-bindings/clock/imx7ulp-clock.h> |
| 81 | #include <dt-bindings/interrupt-controller/arm-gic.h> |
| 82 | |
| 83 | spi@40290000 { |
| 84 | compatible = "fsl,imx7ulp-spi"; |
| 85 | reg = <0x40290000 0x10000>; |
| 86 | interrupt-parent = <&intc>; |
| 87 | interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>; |
| 88 | clocks = <&clks IMX7ULP_CLK_LPSPI2>, |
| 89 | <&clks IMX7ULP_CLK_DUMMY>; |
| 90 | clock-names = "per", "ipg"; |
| 91 | spi-slave; |
| 92 | fsl,spi-only-use-cs1-sel; |
| 93 | num-cs = <2>; |
| 94 | }; |