linux-kernel - Re: [PATCH v3 2/3] x86/platform/p2sb: New Primary to Sideband bridge support driver for Intel SOC's

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Message-ID: <1465831152.30123.21.camel@linux.intel.com>
Date:	Mon, 13 Jun 2016 18:19:12 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:	Tan Jui Nee <jui.nee.tan@...el.com>,
	heikki.krogerus@...ux.intel.com, tglx@...utronix.de,
	mingo@...hat.com, hpa@...or.com, x86@...nel.org,
	ptyser@...-inc.com, lee.jones@...aro.org,
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
	jonathan.yong@...el.com, ong.hock.yu@...el.com,
	weifeng.voon@...el.com, wan.ahmad.zainie.wan.mohamad@...el.com
Subject: Re: [PATCH v3 2/3] x86/platform/p2sb: New Primary to Sideband
 bridge support driver for Intel SOC's

On Mon, 2016-06-13 at 17:25 +0300, Mika Westerberg wrote:
> On Mon, Jun 13, 2016 at 04:54:31PM +0300, Andy Shevchenko wrote:
> > Would work to me, though still the same question: is it possible to
> > avoid building it on even most of Intel platforms, since there, I
> > assume, will be not many users of the module?
> 
> Well, even if you make it configurable via Kconfig, I guess distros
> will
> have to enable it in order to support as wide range of CPUs as
> possible
> in a single binary.

Good point.

Then perhaps the following we can do:
 - add a static boolean flag
 - add __init function where we check either PCI root bridge ID or CPU
ID (I don't know which one is better, I suppose second one, though it
will require an update of arch/x86/include/asm/intel-family.h)
 - add a check into the function.

What do you think?

-- 

Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy