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spi: omap2-mcspi: add generic DMA request support to the DT binding

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The binding definition is based on the generic DMA request binding

Signed-off-by: Matt Porter <mporter@ti.com>
Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Matt Porter 2013-06-24 17:31:59 +05:30 • committed by Mark Brown
parent 74f3aaad21
commit 0b9e49e670
1 changed files with 26 additions and 1 deletions
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27
Documentation/devicetree/bindings/spi/omap-spi.txt
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@ -10,7 +10,18 @@ Required properties:
input. The default is D0 as input and input. The default is D0 as input and
D1 as output. D1 as output.
Example: Optional properties:
- dmas: List of DMA specifiers with the controller specific format
as described in the generic DMA client binding. A tx and rx
specifier is required for each chip select.
- dma-names: List of DMA request names. These strings correspond
1:1 with the DMA specifiers listed in dmas. The string naming
is to be "rxN" and "txN" for RX and TX requests,
respectively, where N equals the chip select number.
Examples:
[hwmod populated DMA resources]
mcspi1: mcspi@1 { mcspi1: mcspi@1 {
#address-cells = <1>; #address-cells = <1>;
@ -20,3 +31,17 @@ mcspi1: mcspi@1 {
ti,spi-num-cs = <4>; ti,spi-num-cs = <4>;
}; };
[generic DMA request binding]
mcspi1: mcspi@1 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "ti,omap4-mcspi";
ti,hwmods = "mcspi1";
ti,spi-num-cs = <2>;
dmas = <&edma 42
&edma 43
&edma 44
&edma 45>;
dma-names = "tx0", "rx0", "tx1", "rx1";
};