linux-kernel - Re: [PATCH v3 3/3] gpio: add Intel SCH GPIO controller driver

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Message-ID: <20100301195059.150a9972@lxorguk.ukuu.org.uk>
Date:	Mon, 1 Mar 2010 19:50:59 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Len Brown <lenb@...nel.org>
Cc:	David Brownell <david-b@...bell.net>,
	Denis Turischev <denis@...pulab.co.il>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 3/3] gpio: add Intel SCH GPIO controller driver

On Mon, 01 Mar 2010 13:09:22 -0500 (EST)
Len Brown <lenb@...nel.org> wrote:

> > I've looked at two x86 drivers in drivers/gpiolib (cs5535 and langwell) and
> > there's no treatment of ACPI in either of them. Since SCH is defined by Intel
> > as "embedded" product, having a GPIO driver for it seems logical even despite
> > problems you mention.
> 
> FWIW
> I believe that Langwell is used only in products without an ACPI BIOS.
> 
> Poulsbo, OTOH, is used in zillions of netbooks running Windows XP.
> I don't know what a cs5535 is.

Cyrix (then NatSemi then AMD) Geode companion chip. May be present
without having ACPI although ACPI was added as a BIOS upgrade to the older
ones.

Alan
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