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ASoC: samsung: Add missing #sound-dai-cells property documentation 

The #sound-dai-cells property might be helpful in selecting primary
or secondary CPU DAI and it's already present in i2s nodes for some
exynos SoCs so let's add it to the DT binding documentation.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Sylwester Nawrocki 2018-02-12 17:15:38 +01:00 committed by Mark Brown
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commit 3f0c43e60d
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Documentation/devicetree/bindings/sound/samsung-i2s.txt
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@ -60,6 +60,7 @@ Optional SoC Specific Properties:
sub system(used in secondary sound source). sub system(used in secondary sound source).
- pinctrl-0: Should specify pin control groups used for this controller. - pinctrl-0: Should specify pin control groups used for this controller.
- pinctrl-names: Should contain only one value - "default". - pinctrl-names: Should contain only one value - "default".
- #sound-dai-cells: should be 1.
Example: Example:
@ -79,4 +80,5 @@ i2s0: i2s@3830000 {
samsung,idma-addr = <0x03000000>; samsung,idma-addr = <0x03000000>;
pinctrl-names = "default"; pinctrl-names = "default";
pinctrl-0 = <&i2s0_bus>; pinctrl-0 = <&i2s0_bus>;
#sound-dai-cells = <1>;
}; };