On Mon, May 9, 2011 at 11:29 AM, Henrique de Moraes Holschuh <hmh@xxxxxxxxxx> wrote: > On Mon, 09 May 2011, Andrew Lutomirski wrote: >> > The SBS interface exposes more data about the battery, including >> > per-cell-group voltage and pack microcontroller aging counters, alarms, and >> > the "needs to get through the fuel-gaugue reset procedure" semasphore. >> >> If I'm feeling really motivated, I'll look at that. I'm currently >> more interested in the charging thresholds, though, which I think is >> independent of the choice of SBS vs ACPI to access the battery state. >> (From a quick glance at the SBS spec, you can inhibit charging >> entirely but you can't ask for thresholds. I assume that the EC takes >> care of that. If I'm wrong, please tell me, but SMAPI seems like a >> fine way to access the thresholds.) > > Yeah, SMAPI is the safest way to deal with all this. It is an interface > layer that Lenovo is not fond of breaking (or touches very rarely. Amounts > to the same in the end). > > SBS does not take care of thresholds, indeed. The EC does (and I know how > to program the threshold in a few models, if you do want to test it in your > X220, I can send you the information. It is safe to test if you use it > together with SMAPI to cross-check). That would be great. I think it's EC register 0x24 for the BAT0 stop threshold and EC register 0x25 for the BAT1 stop threshold. If you have any hints about the start threshold I can test them, but I suspect that, in the X220, the EC figures out the start threshold on its own. > > The SBS ACPI interface would be useful to provide a single driver that can > replace the ACPI battery one to deliver full functionality in one place. > I'll save that for later :) --Andy > -- > "One disk to rule them all, One disk to find them. One disk to bring > them all and in the darkness grind them. In the Land of Redmond > where the shadows lie." -- The Silicon Valley Tarot > Henrique Holschuh > ------------------------------------------------------------------------------ WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
