linux-kernel - Re: [PATCHv2 2/3] usb: ehci-platform: Use devm_of_phy_get_by

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Date:	Tue, 14 Apr 2015 14:37:37 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Arun Ramamurthy <arun.ramamurthy@...adcom.com>,
	Kishon Vijay Abraham I <kishon@...com>,
	Tony Prisk <linux@...sktech.co.nz>,
	Alan Stern <stern@...land.harvard.edu>,
	Felipe Balbi <balbi@...com>,
	Mathias Nyman <mathias.nyman@...ux.intel.com>,
	Paul Bolle <pebolle@...cali.nl>,
	Thomas Pugliese <thomas.pugliese@...il.com>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	David Mosberger <davidm@...uge.net>,
	Peter Griffin <peter.griffin@...aro.org>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Kevin Hao <haokexin@...il.com>, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-usb@...r.kernel.org,
	Dmitry Torokhov <dtor@...gle.com>,
	Anatol Pomazau <anatol@...gle.com>,
	Jonathan Richardson <jonathar@...adcom.com>,
	Scott Branden <sbranden@...adcom.com>,
	Ray Jui <rjui@...adcom.com>,
	bcm-kernel-feedback-list@...adcom.com
Subject: Re: [PATCHv2 2/3] usb: ehci-platform: Use devm_of_phy_get_by_index

On Tue, Apr 14, 2015 at 01:33:08PM +0200, Arnd Bergmann wrote:
> On Tuesday 14 April 2015 13:19:34 Greg Kroah-Hartman wrote:
> > On Mon, Apr 13, 2015 at 03:10:46PM -0700, Arun Ramamurthy wrote:
> > > Getting phys by index instead of phy names so that we do
> > > not have to create a naming scheme when multiple phys
> > > are present
> > > 
> > > Signed-off-by: Arun Ramamurthy <arun.ramamurthy@...adcom.com>
> > > Reviewed-by: Ray Jui <rjui@...adcom.com>
> > > Reviewed-by: Scott Branden <sbranden@...adcom.com>
> > > ---
> > >  drivers/usb/host/Kconfig         |  1 +
> > >  drivers/usb/host/ehci-platform.c | 70 ++++++++++++++--------------------------
> > >  2 files changed, 26 insertions(+), 45 deletions(-)
> > > 
> > > diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> > > index 5ad60e4..563f22d 100644
> > > --- a/drivers/usb/host/Kconfig
> > > +++ b/drivers/usb/host/Kconfig
> > > @@ -284,6 +284,7 @@ config USB_EHCI_ATH79
> > >  
> > >  config USB_EHCI_HCD_PLATFORM
> > >       tristate "Generic EHCI driver for a platform device"
> > > +     select GENERIC_PHY
> > 
> > Configs should never select if at all possible.
> > 
> 
> This is true, but all other drivers do the same for GENERIC_PHY at the
> moment. If this one gets changed, we should probably apply the same
> solution to all current users and fix them consistently.
> 
> We can do one of these two:
> 
> a) make sure that the framework has 'static inline' stubs that let you
>    build all drivers using it when the framework itself is disabled.

Yes, please do that.

> b) change the drivers using it to 'depends on', and make GENERIC_PHY
>    itself a hidden option without a Kconfig prompt.

Then how could GENERIC_PHY ever get set?

> Either solution is probably simple enough that it can be done as
> part of this series.

That's fine with me, but please no more selects.

thanks,

greg k-h
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