linux-kernel - [PATCH v7 1/2] ASoC: sunxi :add sun4i SPDIF dt bindings

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Message-Id: <1456053218-16325-2-git-send-email-codekipper@gmail.com>
Date:	Sun, 21 Feb 2016 12:13:37 +0100
From:	codekipper@...il.com
To:	maxime.ripard@...e-electrons.com
Cc:	linux-arm-kernel@...ts.infradead.org, linux-sunxi@...glegroups.com,
	lgirdwood@...il.com, broonie@...nel.org,
	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
	be17068@...rbole.bo.it, Marcus Cooper <codekipper@...il.com>
Subject: [PATCH v7 1/2] ASoC: sunxi :add sun4i SPDIF dt bindings

From: Marcus Cooper <codekipper@...il.com>

Add devicetree bindings for the SPDIF transceiver found on
found on Allwinners A10 and A20 SoCs.

Signed-off-by: Marcus Cooper <codekipper@...il.com>
---
 .../bindings/sound/sunxi,sun4i-spdif.txt           | 39 ++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/sunxi,sun4i-spdif.txt

diff --git a/Documentation/devicetree/bindings/sound/sunxi,sun4i-spdif.txt b/Documentation/devicetree/bindings/sound/sunxi,sun4i-spdif.txt
new file mode 100644
index 0000000..13503aa
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/sunxi,sun4i-spdif.txt
@@ -0,0 +1,39 @@
+Allwinner Sony/Philips Digital Interface Format (S/PDIF) Controller
+
+The Allwinner S/PDIF audio block is a transceiver that allows the
+processor to receive and transmit digital audio via an coaxial cable or
+a fibre cable.
+For now only playback is supported.
+
+Required properties:
+
+  - compatible		: should be one of the following:
+    - "allwinner,sun4i-a10-spdif": for the Allwinner A10 SoC
+
+  - reg			: Offset and length of the register set for the device.
+
+  - interrupts		: Contains the spdif interrupt.
+
+  - dmas		: Generic dma devicetree binding as described in
+			  Documentation/devicetree/bindings/dma/dma.txt.
+
+  - dma-names		: Two dmas have to be defined, "tx" and "rx".
+
+  - clocks		: Contains an entry for each entry in clock-names.
+
+  - clock-names		: Includes the following entries:
+	"apb"		  clock for the spdif bus.
+	"spdif"		  clock for spdif controller.
+
+Example:
+
+spdif: spdif@...21000 {
+	compatible = "allwinner,sun4i-a10-spdif";
+	reg = <0x01c21000 0x40>;
+	interrupts = <13>;
+	clocks = <&apb0_gates 1>, <&spdif_clk>;
+	clock-names = "apb", "spdif";
+	dmas = <&dma 0 2>, <&dma 0 2>;
+	dma-names = "rx", "tx";
+	status = "okay";
+};
-- 
2.7.1