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

Alan Cox
2010-03-01T19:47:51Z

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