linux-kernel - Re: [PATCH] phy: omap: Adapt phy-omap-usb2 for AM437x

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Date:	Tue, 15 Oct 2013 12:35:12 +0530
From:	George Cherian <george.cherian@...com>
To:	Mark Rutland <mark.rutland@....com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"tony@...mide.com" <tony@...mide.com>,
	"balbi@...com" <balbi@...com>, "kishon@...com" <kishon@...com>,
	"rob@...dley.net" <rob@...dley.net>,
	"ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>,
	"swarren@...dotorg.org" <swarren@...dotorg.org>,
	Pawel Moll <Pawel.Moll@....com>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>
Subject: Re: [PATCH] phy: omap: Adapt phy-omap-usb2 for AM437x

Hi Mark,

Fixed all your comments and already sent a V2.


On 10/14/2013 8:03 PM, Mark Rutland wrote:
> On Mon, Oct 14, 2013 at 01:43:23PM +0100, George Cherian wrote:
>> This patch adds a compatible for AM437x "ti,am43xx-usb2" to
>> reuse the same phy-omap-usb2 driver.
>>
>> Also updated the documentation to add the new compatible.
>>
>> Signed-off-by: George Cherian <george.cherian@...com>
>> ---
>>   Documentation/devicetree/bindings/usb/usb-phy.txt |  2 +-
>>   drivers/phy/phy-omap-usb2.c                       | 13 ++++++++++---
>>   2 files changed, 11 insertions(+), 4 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/usb/usb-phy.txt b/Documentation/devicetree/bindings/usb/usb-phy.txt
>> index c0245c8..d5a7f21 100644
>> --- a/Documentation/devicetree/bindings/usb/usb-phy.txt
>> +++ b/Documentation/devicetree/bindings/usb/usb-phy.txt
>> @@ -3,7 +3,7 @@ USB PHY
>>   OMAP USB2 PHY
>>   
>>   Required properties:
>> - - compatible: Should be "ti,omap-usb2"
>> + - compatible: Should be "ti,omap-usb2" or "ti,am437x-usb2"
> In case this needs to be modified in future, it might be best to split
> this up one per line, with a brief description of when it applies:
>
> - compatible: Should contain one of:
>    * "ti,omap-usb2" for ____ systems
>    * "ti,am437x-usb2" for ____ systems
>
>>    - reg : Address and length of the register set for the device.
>>    - #phy-cells: determine the number of cells that should be given in the
>>      phandle while referencing this phy.
>> diff --git a/drivers/phy/phy-omap-usb2.c b/drivers/phy/phy-omap-usb2.c
>> index bfc5c33..0529c83 100644
>> --- a/drivers/phy/phy-omap-usb2.c
>> +++ b/drivers/phy/phy-omap-usb2.c
>> @@ -29,6 +29,7 @@
>>   #include <linux/delay.h>
>>   #include <linux/usb/omap_control_usb.h>
>>   #include <linux/phy/phy.h>
>> +#include <linux/of.h>
>>   #include <linux/of_platform.h>
>>   
>>   /**
>> @@ -172,7 +173,10 @@ static int omap_usb2_probe(struct platform_device *pdev)
>>   	phy->dev		= &pdev->dev;
>>   
>>   	phy->phy.dev		= phy->dev;
>> -	phy->phy.label		= "omap-usb2";
>> +	if (of_device_is_compatible(node, "ti,am437x-usb2"))
>> +		phy->phy.label		= "am437x-usb2";
>> +	else
>> +		phy->phy.label		= "omap-usb2";
> Instead of having this check here, you could put together a struct
> containing the data applying to a particular compatible string, and
> associate it with the compatible string using of_device_id::data.
>
> That means we don't need to duplicate the compatible strings, and it's
> easier to extend in future.
>
>>   	phy->phy.set_suspend	= omap_usb2_suspend;
>>   	phy->phy.otg		= otg;
>>   	phy->phy.type		= USB_PHY_TYPE_USB2;
>> @@ -201,8 +205,10 @@ static int omap_usb2_probe(struct platform_device *pdev)
>>   
>>   	otg->set_host		= omap_usb_set_host;
>>   	otg->set_peripheral	= omap_usb_set_peripheral;
>> -	otg->set_vbus		= omap_usb_set_vbus;
>> -	otg->start_srp		= omap_usb_start_srp;
>> +	if (of_device_is_compatible(node, "ti,omap-usb2")) {
>> +		otg->set_vbus		= omap_usb_set_vbus;
>> +		otg->start_srp		= omap_usb_start_srp;
>> +	}
> Similarly here.
>
> Cheers,
> Mark.


-- 
-George

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