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doc: lpspi: Document DT bindings for LPSPI slave mode 

Add introductions of interrupt-parent and spi-slave.

Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Clark Wang 2018-12-07 02:50:41 +00:00 committed by Mark Brown
parent cf86874bb9
commit 62f82df488
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Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt
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@ -5,8 +5,11 @@ Required properties:
- "fsl,imx7ulp-spi" for LPSPI compatible with the one integrated on i.MX7ULP soc
- "fsl,imx8qxp-spi" for LPSPI compatible with the one integrated on i.MX8QXP soc
- reg : address and length of the lpspi master registers
- interrupt-parent : core interrupt controller
- interrupts : lpspi interrupt
- clocks : lpspi clock specifier
- spi-slave : spi slave mode support. In slave mode, add this attribute without
value. In master mode, remove it.
Examples:
@ -16,4 +19,5 @@ lpspi2: lpspi@40290000 {
interrupt-parent = <&intc>;
interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX7ULP_CLK_LPSPI2>;
spi-slave;
};