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dt-bindings: snps,dw-apb-ssi: Add mandatory clock bindings documentation

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The Synopsys SSI driver uses a mandatory clock that is not documented,
so detail it in the device tree bindings. Also correct the spelling of
"pins" in the "Optional Properties" section for the driver.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Gareth Williams <gareth.williams.jx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Phil Edworthy 2019-03-19 15:52:05 +00:00 committed by Mark Brown
parent f457cb7078
commit 57a9f6e7ee
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1 changed files with 3 additions and 1 deletions
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Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt
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@ -8,9 +8,10 @@ Required properties:
- interrupts : One interrupt, used by the controller. - interrupts : One interrupt, used by the controller.
- #address-cells : <1>, as required by generic SPI binding. - #address-cells : <1>, as required by generic SPI binding.
- #size-cells : <0>, also as required by generic SPI binding. - #size-cells : <0>, also as required by generic SPI binding.
- clocks : phandle for the core clock used to generate the external SPI clock.
Optional properties: Optional properties:
- cs-gpios : Specifies the gpio pis to be used for chipselects. - cs-gpios : Specifies the gpio pins to be used for chipselects.
- num-cs : The number of chipselects. If omitted, this will default to 4. - num-cs : The number of chipselects. If omitted, this will default to 4.
- reg-io-width : The I/O register width (in bytes) implemented by this - reg-io-width : The I/O register width (in bytes) implemented by this
device. Supported values are 2 or 4 (the default). device. Supported values are 2 or 4 (the default).
@ -25,6 +26,7 @@ Example:
interrupts = <0 154 4>; interrupts = <0 154 4>;
#address-cells = <1>; #address-cells = <1>;
#size-cells = <0>; #size-cells = <0>;
clocks = <&spi_m_clk>;
num-cs = <2>; num-cs = <2>;
cs-gpios = <&gpio0 13 0>, cs-gpios = <&gpio0 13 0>,
<&gpio0 14 0>; <&gpio0 14 0>;