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[v2,1/4] ASoC: sunxi: Add A10 I2S controller binding documentation

Message ID 20160615211123.31068-2-maxime.ripard@free-electrons.com (mailing list archive)
State Accepted
Commit 38c81719b1658fdff7d3509b8a0c6294ce29c3d4
Headers show

Commit Message

Maxime Ripard June 15, 2016, 9:11 p.m. UTC 
Introduce the device tree binding for the I2S controller found in the
Allwinner A10 and later SoCs.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
 .../devicetree/bindings/sound/sun4i-i2s.txt        | 34 ++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/sun4i-i2s.txt

Comments

Rob Herring (Arm) June 19, 2016, 2:37 p.m. UTC | #1 
On Wed, Jun 15, 2016 at 11:11:20PM +0200, Maxime Ripard wrote:
> Introduce the device tree binding for the I2S controller found in the
> Allwinner A10 and later SoCs.
> 
> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> ---
>  .../devicetree/bindings/sound/sun4i-i2s.txt        | 34 ++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/sun4i-i2s.txt

Acked-by: Rob Herring <robh@kernel.org>
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Patch

diff --git a/Documentation/devicetree/bindings/sound/sun4i-i2s.txt b/Documentation/devicetree/bindings/sound/sun4i-i2s.txt
new file mode 100644
index 000000000000..7b526ec64991
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/sun4i-i2s.txt
@@ -0,0 +1,34 @@ 
+* Allwinner A10 I2S controller
+
+The I2S bus (Inter-IC sound bus) is a serial link for digital
+audio data transfer between devices in the system.
+
+Required properties:
+
+- compatible: should be one of the followings
+   - "allwinner,sun4i-a10-i2s"
+- reg: physical base address of the controller and length of memory mapped
+  region.
+- interrupts: should contain the I2S interrupt.
+- dmas: DMA specifiers 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" : clock for the I2S bus interface
+   - "mod" : module clock for the I2S controller
+- #sound-dai-cells : Must be equal to 0
+
+Example:
+
+i2s0: i2s@01c22400 {
+	#sound-dai-cells = <0>;
+	compatible = "allwinner,sun4i-a10-i2s";
+	reg = <0x01c22400 0x400>;
+	interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&apb0_gates 3>, <&i2s0_clk>;
+	clock-names = "apb", "mod";
+	dmas = <&dma SUN4I_DMA_NORMAL 3>,
+	       <&dma SUN4I_DMA_NORMAL 3>;
+	dma-names = "rx", "tx";
+};