linux-kernel - Re: [PATCH v2 2/4] phy: phy-amxxxx-usb: Add PHY driver for amxxxx platform

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Message-ID: <51F77F15.7090306@linutronix.de>
Date:	Tue, 30 Jul 2013 10:53:41 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	George Cherian <george.cherian@...com>
CC:	linux-usb@...r.kernel.org, balbi@...com,
	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org,
	linux-omap@...r.kernel.org, kishon@...com
Subject: Re: [PATCH v2 2/4] phy: phy-amxxxx-usb: Add PHY driver for amxxxx
 platform

On 07/30/2013 07:19 AM, George Cherian wrote:
>> So from what I see now, it is most likely the easiest thing to just add
>> that wakeup to the phy driver I posted. Do you agree?
> 
> The whole idea of writing a seperate phy driver was to use the generic
> phy framework
> and most of the amxxxx devices have the same phy (eg am335x, am437x).
> Now since the register is shared in am335x for phy_wkup (Not in the case
> of am437x)
> how are you planning to  map it. I feel if omap_control_usb can delegate
> the writes
> to phy_wkup, phy_on and phy_off, it makes the life simpler.

that omap-control driver looks a little strange. It has a compatible
field saying ti,omap-control-usb and then it requires additionally a
ti,type property which should have been avoided.

But back to the initial problem. I don't really like the idea of
touching in the control-module registers but others do it as well.
So the idea of a control driver doesn't sound that bad.
- an am335x-reset device
- a phy driver with a reference to that reset device.
- non-standard phy calls for power & wak eup on/off.

Let me think about it.

> 
> Thoughts???

I think I buy it but give me a bit…

> 

Sebastian
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