Battery charge limiting

[Tamas Szakaly]

On Thu, Oct 20, 2011 at 04:44:24PM +0400, Dmitry Kolosov wrote:
> > for thinkpads, there is no need to reverse any win32 stuff.. there is a
> > linux driver that accesses the EC and is able to get/set battery
> > parameters (among other stuff, like HDAPS) called tp_smapi
> > (http://sourceforge.net/projects/tpctl/)
> 
> Ok. It looks like not every EC capable to be controlled, there is some kind of 
> active and passive ECs. How we can guess the one IS capable? May be presence 
> of some ACPI methods is the symptom of such capabilities? Any suggestions?
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according to tp_smapi sources one could check the DMI device names for the
string "IBM ThinkPad Embedded Controller".. if that string is present, the EC
should be OK.. 

plus there are some older TP models that does not report the existence of a 
good EC through DMI, but they have one - they are whitelisted in the linux 
driver..

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