linux-kernel - [PATCH 1/2] Documentation: bindings: Add the Allwinner A10 codec bindings

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Message-Id: <1442064384-23379-2-git-send-email-maxime.ripard@free-electrons.com>
Date:	Sat, 12 Sep 2015 15:26:23 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
Cc:	Emilio Lopez <emilio@...pez.com.ar>, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-sunxi@...glegroups.com,
	alsa-devel@...a-project.org,
	Maxime Ripard <maxime.ripard@...e-electrons.com>
Subject: [PATCH 1/2] Documentation: bindings: Add the Allwinner A10 codec bindings

The Allwinner SoCs have an in-SoC audio controller taking the role of a DAI
and a codec.

Add the binding documentation for that controller on the A10.

Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
---
 .../devicetree/bindings/sound/sun4i-codec.txt      | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/sun4i-codec.txt

diff --git a/Documentation/devicetree/bindings/sound/sun4i-codec.txt b/Documentation/devicetree/bindings/sound/sun4i-codec.txt
new file mode 100644
index 000000000000..680144b74ae9
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/sun4i-codec.txt
@@ -0,0 +1,33 @@
+* Allwinner A10 Codec
+
+Required properties:
+- compatible: must be either "allwinner,sun4i-a10-codec" or
+  "allwinner,sun7i-a20-codec"
+- reg: must contain the registers location and length
+- interrupts: must contain the codec interrupt
+- dmas: DMA channels for tx and rx dma. See the DMA client binding,
+	Documentation/devicetree/bindings/dma/dma.txt
+- dma-names: should include "tx" and "rx".
+- clocks: a list of phandle + clock-specifer pairs, one for each entry
+  in clock-names.
+- clock-names: should contain followings:
+   - "apb": the parent APB clock for this controller
+   - "codec": the parent module clock
+- routing : A list of the connections between audio components.  Each
+  entry is a pair of strings, the first being the connection's sink,
+  the second being the connection's source.
+
+
+Example:
+codec: codec@...22c00 {
+	#sound-dai-cells = <0>;
+	compatible = "allwinner,sun7i-a20-codec";
+	reg = <0x01c22c00 0x40>;
+	interrupts = <0 30 4>;
+	clocks = <&apb0_gates 0>, <&codec_clk>;
+	clock-names = "apb", "codec";
+	dmas = <&dma 0 19>, <&dma 0 19>;
+	dma-names = "rx", "tx";
+	routing = "Headphone Jack", "HP Right",
+		  "Headphone Jack", "HP Left";
+};
-- 
2.5.1

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