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29d2daf2c3
The SPI bus number is completely optional to Linux, so make the corresponding device tree property optional as well. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Link: https://lore.kernel.org/r/20200305115546.31814-1-s.hauer@pengutronix.de Signed-off-by: Mark Brown <broonie@kernel.org>
65 lines
2 KiB
Text
65 lines
2 KiB
Text
ARM Freescale DSPI controller
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Required properties:
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- compatible : must be one of:
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"fsl,vf610-dspi",
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"fsl,ls1021a-v1.0-dspi",
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"fsl,ls1012a-dspi" (optionally followed by "fsl,ls1021a-v1.0-dspi"),
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"fsl,ls1028a-dspi",
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"fsl,ls1043a-dspi" (optionally followed by "fsl,ls1021a-v1.0-dspi"),
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"fsl,ls1046a-dspi" (optionally followed by "fsl,ls1021a-v1.0-dspi"),
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"fsl,ls1088a-dspi" (optionally followed by "fsl,ls1021a-v1.0-dspi"),
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"fsl,ls2080a-dspi" (optionally followed by "fsl,ls2085a-dspi"),
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"fsl,ls2085a-dspi",
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"fsl,lx2160a-dspi",
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- reg : Offset and length of the register set for the device
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- interrupts : Should contain SPI controller interrupt
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- clocks: from common clock binding: handle to dspi clock.
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- clock-names: from common clock binding: Shall be "dspi".
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- pinctrl-0: pin control group to be used for this controller.
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- pinctrl-names: must contain a "default" entry.
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- spi-num-chipselects : the number of the chipselect signals.
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Optional property:
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- big-endian: If present the dspi device's registers are implemented
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in big endian mode.
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- bus-num : the slave chip chipselect signal number.
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Optional SPI slave node properties:
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- fsl,spi-cs-sck-delay: a delay in nanoseconds between activating chip
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select and the start of clock signal, at the start of a transfer.
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- fsl,spi-sck-cs-delay: a delay in nanoseconds between stopping the clock
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signal and deactivating chip select, at the end of a transfer.
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Example:
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dspi0@4002c000 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "fsl,vf610-dspi";
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reg = <0x4002c000 0x1000>;
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interrupts = <0 67 0x04>;
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clocks = <&clks VF610_CLK_DSPI0>;
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clock-names = "dspi";
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spi-num-chipselects = <5>;
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bus-num = <0>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_dspi0_1>;
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big-endian;
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sflash: at26df081a@0 {
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#address-cells = <1>;
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#size-cells = <1>;
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compatible = "atmel,at26df081a";
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spi-max-frequency = <16000000>;
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spi-cpol;
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spi-cpha;
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reg = <0>;
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linux,modalias = "m25p80";
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modal = "at26df081a";
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fsl,spi-cs-sck-delay = <100>;
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fsl,spi-sck-cs-delay = <50>;
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};
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};
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