linux-kernel - Re: [PATCH 11/17] ARM: dts: dra7: Use "ti,dra7x-usb2-phy2" compatible string for USB2 PHY2

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Date:	Wed, 24 Jun 2015 15:07:50 +0300
From:	Roger Quadros <rogerq@...com>
To:	Kishon Vijay Abraham I <kishon@...com>
CC:	<bcousson@...libre.com>, <tony@...mide.com>, <balbi@...com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-usb@...r.kernel.org>, <robh+dt@...nel.org>,
	<pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<linux@....linux.org.uk>, <gregkh@...uxfoundation.org>,
	<nsekhar@...com>
Subject: Re: [PATCH 11/17] ARM: dts: dra7: Use "ti,dra7x-usb2-phy2"
 compatible string for USB2 PHY2

On Tue, 23 Jun 2015 17:28:56 +0530
Kishon Vijay Abraham I <kishon@...com> wrote:

> The USB2 PHY2 has a different register map compared to USB2 PHY1
> to power on/off the PHY. In order to handle it, use the new compatible
> string "ti,dra7x-usb2-phy2" for the second instance of USB2 PHY.
> 
> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> ---
>  arch/arm/boot/dts/dra7.dtsi |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
> index f69db70..a8ee829 100644
> --- a/arch/arm/boot/dts/dra7.dtsi
> +++ b/arch/arm/boot/dts/dra7.dtsi
> @@ -1235,7 +1235,7 @@
>  			};
>  
>  			usb2_phy2: phy@...85000 {
> -				compatible = "ti,omap-usb2";
> +				compatible = "ti,dra7x-usb2-phy2", "ti,omap-usb2";

Why do you want to retain "ti,omap-usb2".
It is not backward compatible with it right?

>  				reg = <0x4a085000 0x400>;
>  				ctrl-module = <&omap_control_usb2phy2>;
>  				clocks = <&usb_phy2_always_on_clk32k>,
> -- 
> 1.7.9.5
> 

cheers,
-roger
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