linux-kernel - Re: Correct place for USB PHY driver

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Date:	Mon, 11 Jan 2016 12:56:27 +0100
From:	Mason <slash.tmp@...e.fr>
To:	Kishon Vijay Abraham I <kishon@...com>, Felipe Balbi <balbi@...com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	linux-usb <linux-usb@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: Correct place for USB PHY driver

On 11/01/2016 11:28, Kishon Vijay Abraham I wrote:

> On Monday 11 January 2016 03:37 PM, Mason wrote:
>
>> I have a board with a Chipidea controller.
>> I use a custom PHY driver for it.
>>
>> Should the PHY driver live in drivers/phy or in drivers/usb/phy ?
> 
> All new phy drivers should be in drivers/phy using the generic PHY framework.
>
>> I was playing with a modular build and hit this problem:
>> ERROR: "of_usb_get_phy_mode" [drivers/usb/chipidea/ci_hdrc.ko] undefined!
>>
>> I'm currently using v4.1.13 and I saw that Arnd fixed something related
>> probably in a later version:
>>
>>   http://thread.gmane.org/gmane.linux.ports.arm.kernel/457561
>>
>> Was this patch accepted upstream?
> 
> I think no.

The driver I use is in drivers/phy and my config has

CONFIG_GENERIC_PHY=y
# CONFIG_USB_PHY is not set

But I do hit the "of_usb_get_phy_mode undefined" error when I
set all of USB to m.

Arnd, do you think your patch needs to be carried over to generic PHY?

Regards.