linux-kernel - Re: [PATCH v3 2/3] ASoC: zx-i2s: introduce pclk for zx2967 family

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Date:   Wed, 8 Feb 2017 18:52:07 -0600
From:   Rob Herring <robh@...nel.org>
To:     Baoyou Xie <baoyou.xie@...aro.org>
Cc:     lgirdwood@...il.com, broonie@...nel.org, mark.rutland@....com,
        jun.nie@...aro.org, mturquette@...libre.com, sboyd@...eaurora.org,
        perex@...ex.cz, tiwai@...e.com, shawn.guo@...aro.org,
        vinod.koul@...el.com, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        shawnguo@...nel.org, mathieu.poirier@...aro.org,
        xie.baoyou@....com.cn, chen.chaokai@....com.cn,
        wang.qiang01@....com.cn
Subject: Re: [PATCH v3 2/3] ASoC: zx-i2s: introduce pclk for zx2967 family

On Wed, Feb 08, 2017 at 11:02:34AM +0800, Baoyou Xie wrote:
> ZTE's zx2967 I2S controller driver introduces pclk, this
> patch documents this fact.

Now we have the same subject for patches 2 and 3.

Personally, I'd prefer "dt-bindings: sound: blah...", but not enough to 
argue with Mark about it. If that is not the prefix, then it should at 
least have "binding" in the subject.

> Signed-off-by: Baoyou Xie <baoyou.xie@...aro.org>
> ---
>  Documentation/devicetree/bindings/sound/zte,zx-i2s.txt | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/sound/zte,zx-i2s.txt b/Documentation/devicetree/bindings/sound/zte,zx-i2s.txt
> index 7e5aa6f..77390c0 100644
> --- a/Documentation/devicetree/bindings/sound/zte,zx-i2s.txt
> +++ b/Documentation/devicetree/bindings/sound/zte,zx-i2s.txt
> @@ -4,7 +4,7 @@ Required properties:
>   - compatible : Must be "zte,zx296702-i2s"
>   - reg : Must contain I2S core's registers location and length
>   - clocks : Pairs of phandle and specifier referencing the controller's clocks.
> - - clock-names: "tx" for the clock to the I2S interface.
> + - clock-names: "wclk" for the wclk, "pclk" for the pclk to the I2S interface.
>   - dmas: Pairs of phandle and specifier for the DMA channel that is used by
>     the core. The core expects two dma channels for transmit.
>   - dma-names : Must be "tx" and "rx"
> @@ -15,13 +15,17 @@ please check:
>  	* clock/clock-bindings.txt
>  	* dma/dma.txt
>  
> +Please note that ZTE ZX296702 I2S controller driver is compatible for zx296702
> +and zx296718, so compatible string might be set as follow:
> +	"zte,zx296718-i2s", "zte,zx296702-i2s"

Drop this and just make compatible doc above like this:

   - compatible : Must be one of:
	"zte,zx296718-i2s", "zte,zx296702-i2s"
	"zte,zx296702-i2s"

> +
>  Example:
>  	i2s0: i2s0@...05000 {

BTW, this should be "i2s@...05000". No trailing 0 on i2s and no leading 
0 on unit-address.

>  		#sound-dai-cells = <0>;
> -		compatible = "zte,zx296702-i2s";
> +		compatible = "zte,zx296718-i2s", "zte,zx296702-i2s";
>  		reg = <0x0b005000 0x1000>;
> -		clocks = <&lsp0clk ZX296702_I2S0_DIV>;
> -		clock-names = "tx";
> +		clocks = <&audiocrm AUDIO_I2S0_WCLK>, <&audiocrm AUDIO_I2S0_PCLK>;
> +		clock-names = "wclk", "pclk";
>  		interrupts = <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>;
>  		dmas = <&dma 5>, <&dma 6>;
>  		dma-names = "tx", "rx";
> -- 
> 2.7.4
>