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Diffstat (limited to 'Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml')
-rw-r--r-- | Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml new file mode 100644 index 0000000000..727c5346b8 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml @@ -0,0 +1,94 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spi/spi-fsl-lpspi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Freescale Low Power SPI (LPSPI) for i.MX + +maintainers: + - Anson Huang <Anson.Huang@nxp.com> + +allOf: + - $ref: /schemas/spi/spi-controller.yaml# + +properties: + compatible: + oneOf: + - enum: + - fsl,imx7ulp-spi + - fsl,imx8qxp-spi + - items: + - enum: + - fsl,imx8ulp-spi + - fsl,imx93-spi + - const: fsl,imx7ulp-spi + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + items: + - description: SoC SPI per clock + - description: SoC SPI ipg clock + + clock-names: + items: + - const: per + - const: ipg + + dmas: + items: + - description: TX DMA Channel + - description: RX DMA Channel + + dma-names: + items: + - const: tx + - const: rx + + fsl,spi-only-use-cs1-sel: + description: + spi common code does not support use of CS signals discontinuously. + i.MX8DXL-EVK board only uses CS1 without using CS0. Therefore, add + this property to re-config the chipselect value in the LPSPI driver. + type: boolean + + num-cs: + description: + number of chip selects. + minimum: 1 + maximum: 2 + default: 1 + + power-domains: + maxItems: 1 + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/clock/imx7ulp-clock.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + + spi@40290000 { + compatible = "fsl,imx7ulp-spi"; + reg = <0x40290000 0x10000>; + interrupt-parent = <&intc>; + interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&clks IMX7ULP_CLK_LPSPI2>, + <&clks IMX7ULP_CLK_DUMMY>; + clock-names = "per", "ipg"; + spi-slave; + fsl,spi-only-use-cs1-sel; + num-cs = <2>; + }; |