linux-kernel - Re: [PATCH 1/4] dt-bindings: Add A10 I2S controller binding documentation

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Date:	Mon, 6 Jun 2016 08:08:18 -0500
From:	Rob Herring <robh@...nel.org>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	Chen-Yu Tsai <wens@...e.org>, Mark Brown <broonie@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	Andrea Venturi <ennesimamail.av@...il.com>,
	Code Kipper <codekipper@...il.com>, gianfranco@...devices.com
Subject: Re: [PATCH 1/4] dt-bindings: Add A10 I2S controller binding
 documentation

On Wed, Jun 01, 2016 at 07:54:27PM +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@...e-electrons.com>
> ---
>  .../devicetree/bindings/sound/sun4i-i2s.txt        | 33 ++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/sun4i-i2s.txt
> 
> diff --git a/Documentation/devicetree/bindings/sound/sun4i-i2s.txt b/Documentation/devicetree/bindings/sound/sun4i-i2s.txt
> new file mode 100644
> index 000000000000..365ca4eede5f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/sun4i-i2s.txt
> @@ -0,0 +1,33 @@
> +* 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
> +
> +Example:
> +
> +i2s0: i2s@...22400 {
> +	#sound-dai-cells = <0>;

This is missing from the property list.

> +	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";
> +};
> -- 
> 2.8.3
>