[lm-sensors] Support for SMBus based GMT G781 and G7811 temperature sensors.

Jean Delvare khali at linux-fr.org
Mon Jan 23 08:55:03 CET 2012

On Mon, 23 Jan 2012 08:02:20 +0200, Mike Gorchak wrote:
> Hello, Guenter!
>  GR> never mind; no idea if G7811 ever really existed. I found version 1.3
>  GR> of the datasheet which describes both G781 and G781-1. Can you test the
>  GR> driver and sensors-detect if I send you a pointer to the code ?
> It seems that this patch is ok, except for one thing.
> Let me explain what I did. I added support for ACPI SMBus connected to 
> Embedded Controller to the lm-sensors (for a netbook without proper ACPI 
> support). There are two G781 sensors connected to this bus, one to the 
> address 0x4C and one to the 0x4D. Both sensors have 0x01 as device id. But 
> patch assumes that only G781-1 can be connected to the 0x4D address.

If they followed a naming logic similar to National Semiconductor, G781
will have address 0x4C and G781-1 will have address 0x4D. They are
basically the exact same chip except for the address, so the driver
doesn't even need to know, other than the fact that both addresses 0x4C
and 0x4D are possible.

Jean Delvare

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