linux-kernel - [PATCH v2 2/2] ASoC: sirf: Add device tree binding for the USP audio device

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Date:	Wed, 2 Jul 2014 10:45:42 +0800
From:	Rongjun Ying <rongjun.ying@....com>
To:	Mark Brown <broonie@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Barry Song <baohua@...nel.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	<linux-kernel@...r.kernel.org>, <alsa-devel@...a-project.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, <Workgroup.linux@....com>
CC:	Rongjun Ying <rongjun.ying@....com>
Subject: [PATCH v2 2/2] ASoC: sirf: Add device tree binding for the USP audio device

Signed-off-by: Rongjun Ying <rongjun.ying@....com>
---
 .../devicetree/bindings/sound/sirf-usp.txt         | 27 ++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/sirf-usp.txt

diff --git a/Documentation/devicetree/bindings/sound/sirf-usp.txt b/Documentation/devicetree/bindings/sound/sirf-usp.txt
new file mode 100644
index 0000000..02f85b3
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/sirf-usp.txt
@@ -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@...80000 {
+	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>;
+};
+
-- 
1.9.3



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