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Accesing GPIO of ICH10

To: kernelnewbies@xxxxxxxxxxxx
Subject: Accesing GPIO of ICH10
From: Lakshmana Reddy <rvlreddy.tech@xxxxxxxxx>
Date: Wed, 1 Apr 2009 17:09:27 -0700
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Hi,

I was trying toggle one of the GPIO pins on ICH10 chipset (Intel southbridge), but couldn't find the relevant GPIO source in linux 2.6.23.
Can somebody shed some light on relevant sources in linux to access the GPIO address.

From the datasheet I see there is a GPIOBASE which is LPC config register, so technically mapping the GPIOBASE + offset would give me access to the required GPIO reg.
I looked at "arch/i386", boot related code.. couldnt find the any place these GPIOBASE getting configured.
Unlike for other embedded platform (arm/mips), i386/x-86 doesn't have its own "gpio" sources.

Any help is greatly appreciated.
Thanks in advance.

Lakshmana

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