5113f6f70
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kernel add
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ARM Freescale DSPI controller
Required properties:
- compatible : "fsl,vf610-dspi", "fsl,ls1021a-v1.0-dspi", "fsl,ls2085a-dspi"
- reg : Offset and length of the register set for the device
- interrupts : Should contain SPI controller interrupt
- clocks: from common clock binding: handle to dspi clock.
- clock-names: from common clock binding: Shall be "dspi".
- pinctrl-0: pin control group to be used for this controller.
- pinctrl-names: must contain a "default" entry.
- spi-num-chipselects : the number of the chipselect signals.
- bus-num : the slave chip chipselect signal number.
Optional property:
- big-endian: If present the dspi device's registers are implemented
in big endian mode, otherwise in native mode(same with CPU), for more
detail please see: Documentation/devicetree/bindings/regmap/regmap.txt.
Optional SPI slave node properties:
- fsl,spi-cs-sck-delay: a delay in nanoseconds between activating chip
select and the start of clock signal, at the start of a transfer.
- fsl,spi-sck-cs-delay: a delay in nanoseconds between stopping the clock
signal and deactivating chip select, at the end of a transfer.
Example:
dspi0@4002c000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,vf610-dspi";
reg = <0x4002c000 0x1000>;
interrupts = <0 67 0x04>;
clocks = <&clks VF610_CLK_DSPI0>;
clock-names = "dspi";
spi-num-chipselects = <5>;
bus-num = <0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_dspi0_1>;
big-endian;
status = "okay";
sflash: at26df081a@0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "atmel,at26df081a";
spi-max-frequency = <16000000>;
spi-cpol;
spi-cpha;
reg = <0>;
linux,modalias = "m25p80";
modal = "at26df081a";
fsl,spi-cs-sck-delay = <100>;
fsl,spi-sck-cs-delay = <50>;
};
};
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