Re: Smart Battery System driver

Rich Townsend
2005-01-15T06:38:55Z

Matthew Garrett wrote:
> On Fri, 2005-01-14 at 14:23 -0500, Rich Townsend wrote:
>
>
>>...provides access to the SBS via a new /proc/acpi/sbs interface, and
>>also provides a "legacy" /proc/acpi/battery interface that current
>>battery-monitoring tools can access. This driver depends on Bruno's
>>i2c-acpi-ec driver, which I have included with my source code since a
>>couple of bug fixes were necessary.
>
>
> One thing I've been meaning to ask - several Thinkpads have an
> interesting design issue, whereby reading certain smbus addresses can
> render the machine unbootable without a motherboard replacement. As a
> result, i2c-piix refuses to load on Thinkpads. Does something similar
> need to be done for i2c-acpi-ec, or does it only provide i2c access to
> devices connected to the embedded controller?
>

My gut instinct would be that the i2c-acpi-ec SBMus host in the embedded
controller is distinct from the i2c-piix SMBus host in the southbridge.
But I really am very new to all of this, and gut instinct won't bring a
dead Thinkpad back to life. I would sit tight until someone with deeper
knowledge says "yay or nay".

cheers,

Rich

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