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

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Message-ID: <558AAC47.2070305@ti.com>
Date:	Wed, 24 Jun 2015 18:40:31 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	Roger Quadros <rogerq@...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

Hi,

On Wednesday 24 June 2015 05:37 PM, Roger Quadros wrote:
> 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?

The newer dtbs will anyway have "ti,dra7x-usb2-phy2", so "ti,omap-usb2" was
kept just for legacy reasons.

Thanks
Kishon
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