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Subject[PATCH V2 2/8] doc: lpspi: Document DT bindings for LPSPI clocks
Date
Add introductions of clocks and clock-names strings.

Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
---
V2:
- Add this DT-bindings string in this version.
---
.../devicetree/bindings/spi/spi-fsl-lpspi.txt | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt
index 6cc3c6fe25a3..e71b81a41ac0 100644
--- a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt
+++ b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt
@@ -7,7 +7,11 @@ Required properties:
- reg : address and length of the lpspi master registers
- interrupt-parent : core interrupt controller
- interrupts : lpspi interrupt
-- clocks : lpspi clock specifier
+- clocks : lpspi clock specifier. Its number and order need to correspond to the
+ value in clock-names.
+- clock-names : Corresponding to per clock and ipg clock in "clocks"
+ respectively. In i.MX7ULP, it only has per clk, so use CLK_DUMMY
+ to fill the "ipg" blank.
- spi-slave : spi slave mode support. In slave mode, add this attribute without
value. In master mode, remove it.

@@ -18,6 +22,8 @@ lpspi2: lpspi@40290000 {
reg = <0x40290000 0x10000>;
interrupt-parent = <&intc>;
interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&clks IMX7ULP_CLK_LPSPI2>;
+ clocks = <&clks IMX7ULP_CLK_LPSPI2>,
+ <&clks IMX7ULP_CLK_DUMMY>;
+ clock-names = "per", "ipg";
spi-slave;
};
--
2.17.1
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