[PATCH V3 4/4] doc: lpspi: Document DT bindings for LPSPI slave mode

Clark Wang
2018-12-07T02:50:49Z

Add introductions of interrupt-parent and spi-slave.

Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
---
Change log:
V2:
- No change.
V3:
- Keep the description of "fsl,imx8qxp-spi" in spi-fsl-lpspi.txt.
---
Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt
index 8d178a4503cf..6cc3c6fe25a3 100644
--- a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt
+++ b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt
@@ -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;
};
--
2.17.1