linux-kernel - Re: [PATCH 1/2] ASoC: dt-bindings: add rockchip i2s bindings

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Date:	Tue, 1 Jul 2014 09:54:42 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	jianqun <xjq@...k-chips.com>
Cc:	"heiko@...ech.de" <heiko@...ech.de>,
	"lgirdwood@...il.com" <lgirdwood@...il.com>,
	"broonie@...nel.org" <broonie@...nel.org>,
	"perex@...ex.cz" <perex@...ex.cz>, "tiwai@...e.de" <tiwai@...e.de>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"zhangqing@...k-chips.com" <zhangqing@...k-chips.com>,
	"hj@...k-chips.com" <hj@...k-chips.com>,
	"kever.yang@...k-chips.com" <kever.yang@...k-chips.com>,
	"huangtao@...k-chips.com" <huangtao@...k-chips.com>,
	"zyw@...k-chips.com" <zyw@...k-chips.com>,
	"yzq@...k-chips.com" <yzq@...k-chips.com>,
	"zhenfu.fang@...k-chips.com" <zhenfu.fang@...k-chips.com>,
	"cf@...k-chips.com" <cf@...k-chips.com>,
	"kfx@...k-chips.com" <kfx@...k-chips.com>
Subject: Re: [PATCH 1/2] ASoC: dt-bindings: add rockchip i2s bindings

On Tue, Jul 01, 2014 at 09:37:39AM +0100, jianqun wrote:
> From: Jianqun Xu <xjq@...k-chips.com>
> 
> Add devicetree bindings for i2s controller found on rk3066, rk3188 and rk3288
> processors from rockchip.
> 
> Signed-off-by: Jianqun Xu <xjq@...k-chips.com>
> ---
>  .../devicetree/bindings/sound/rockchip-i2s.txt     |   45 ++++++++++++++++++++
>  1 file changed, 45 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/rockchip-i2s.txt
> 
> diff --git a/Documentation/devicetree/bindings/sound/rockchip-i2s.txt b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
> new file mode 100644
> index 0000000..e9ab122
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
> @@ -0,0 +1,45 @@
> +* Rockchip I2S controller
> +
> +The I2S bus (Inter-IC sound bus) is a serial link for digital audio data transfer
> +between devices in the system and be invented by Philips Semiconductor.
> +
> +Required properties:
> +
> +- compatible : should be one of the following.
> +   "rockchip,rk3066-i2s": for rk3066
> +   "rockchip,rk3188-i2s", "rockchip,rk3066-i2s" for rk3188
> +   "rockchip,rk3288-i2s", "rockchip,rk3066-i2s" for rk3288
> +- reg : physical base address of the controller and length of memory mapped
> +  region.
> +- interrupts : The interrupt number to the cpu. The interrupt specifier format
> +  depends on the interrupt controller.
> +- #address-cells : should be 1.
> +- #size-cells : should be 0.
> +- 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.
> +  Must include the following entries:
> +  - rx:
> +  - tx:

Can these be quoted for consistency with clock-names below?

> +- clocks : Handle to internal work clock and master clock output to IO.

Can this be written in terms of clock-names, e.g.

- clocks: a list of phandle + clock-specifer pairs, one for each entry
  in clock-names.

Cheers,
Mark.

> +- clock-names :
> +  - "i2s_hclk": support AHB bus interface
> +  - "i2s_clk": work clock for i2s controller
> +
> +Example:
> +
> +aliases {
> +	i2s0 = &i2s0;
> +}
> +
> +i2s0: i2s@...90000 {
> +	compatible = "rockchip,rk3066-i2s";
> +	reg = <0xff890000 0x10000>;
> +	interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +	dmas = <&pdma1 0>, <&pdma1 1>;
> +	dma-names = "rx", "tx";
> +	clock-names = "i2s_hclk", "i2s_clk";
> +	clocks = <&cru HCLK_I2S0>, <&cru SCLK_I2S0>;
> +};
> -- 
> 1.7.9.5
> 
> 
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