linux-kernel - Re: [PATCH v2 2/2] ARM: dts: Append clock bindings for sai2 on VF610 platform

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Message-ID: <20140402130302.GC8558@dragon>
Date:	Wed, 2 Apr 2014 21:03:04 +0800
From:	Shawn Guo <shawn.guo@...aro.org>
To:	Nicolin Chen <Guangyu.Chen@...escale.com>
CC:	<broonie@...nel.org>, <linux-kernel@...r.kernel.org>,
	<linuxppc-dev@...ts.ozlabs.org>, <alsa-devel@...a-project.org>,
	<timur@...i.org>, <Li.Xiubo@...escale.com>,
	<linux-doc@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<rob@...dley.net>, <galak@...eaurora.org>,
	<ijc+devicetree@...lion.org.uk>, <mark.rutland@....com>,
	<pawel.moll@....com>, <robh+dt@...nel.org>
Subject: Re: [PATCH v2 2/2] ARM: dts: Append clock bindings for sai2 on VF610
 platform

On Wed, Apr 02, 2014 at 06:10:20PM +0800, Nicolin Chen wrote:
> Since we added fours clock to the DT binding, we should update the current
> SAI dts/dtsi so as not to break their functions.
> 
> Signed-off-by: Nicolin Chen <Guangyu.Chen@...escale.com>
> ---
>  arch/arm/boot/dts/vf610.dtsi | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/vf610.dtsi b/arch/arm/boot/dts/vf610.dtsi
> index d31ce1b..9fd0007 100644
> --- a/arch/arm/boot/dts/vf610.dtsi
> +++ b/arch/arm/boot/dts/vf610.dtsi
> @@ -139,8 +139,10 @@
>  				compatible = "fsl,vf610-sai";
>  				reg = <0x40031000 0x1000>;
>  				interrupts = <0 86 0x04>;
> -				clocks = <&clks VF610_CLK_SAI2>;
> -				clock-names = "sai";
> +				clocks = <&clks VF610_CLK_SAI2>,
> +				       <&clks VF610_CLK_SAI2>,
> +				       <&clks 0>, <&clks 0>;

So it seems that SAI on vf610 does work with only one clock.  So the
driver change will break old DTB for vf610?  If that's case, we will
have to need a new compatible for cases where 4 clocks are needed.

Shawn

> +				clock-names = "bus", "mclk1", "mclk2", "mclk3";
>  				status = "disabled";
>  			};
>  
> -- 
> 1.8.4
> 
> 

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