ASoC: sirf: Add device tree binding for the USP audio device
authorRongjun Ying <rongjun.ying@csr.com>
Wed, 2 Jul 2014 02:45:42 +0000 (10:45 +0800)
committerMark Brown <broonie@linaro.org>
Thu, 3 Jul 2014 16:11:41 +0000 (17:11 +0100)
Signed-off-by: Rongjun Ying <rongjun.ying@csr.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Documentation/devicetree/bindings/sound/sirf-usp.txt [new file with mode: 0644]

diff --git a/Documentation/devicetree/bindings/sound/sirf-usp.txt b/Documentation/devicetree/bindings/sound/sirf-usp.txt
new file mode 100644 (file)
index 0000000..02f85b3
--- /dev/null
@@ -0,0 +1,27 @@
+* SiRF SoC USP module
+
+Required properties:
+- compatible: "sirf,prima2-usp-pcm"
+- reg: Base address and size entries:
+- dmas: List of DMA controller phandle and DMA request line ordered pairs.
+- dma-names: Identifier string for each DMA request line in the dmas property.
+  These strings correspond 1:1 with the ordered pairs in dmas.
+
+  One of the DMA channels will be responsible for transmission (should be
+  named "tx") and one for reception (should be named "rx").
+
+- clocks: USP controller clock source
+- pinctrl-names: Must contain a "default" entry.
+- pinctrl-NNN: One property must exist for each entry in pinctrl-names.
+
+Example:
+usp0: usp@b0080000 {
+       compatible = "sirf,prima2-usp-pcm";
+       reg = <0xb0080000 0x10000>;
+       clocks = <&clks 28>;
+       dmas = <&dmac1 1>, <&dmac1 2>;
+       dma-names = "rx", "tx";
+       pinctrl-names = "default";
+       pinctrl-0 = <&usp0_only_utfs_pins_a>;
+};
+