On Wed, Jul 08, 2015 at 01:51:10AM +0200, Sebastian Reichel wrote: > Hi, > > On Tue, Jul 07, 2015 at 11:07:28PM +0200, Julian Andres Klode wrote: > > Hi everyone (Thinkpad-ACPI, ACPI, and Power supply maintainers), > > > > some might know that I presented a patch set adding support for > > charge thresholds to thinkpad_acpi about 1.5 years ago. > > Can you provide a link to the patch set? Sure: http://thread.gmane.org/gmane.linux.acpi.ibm-acpi.devel/3175 (it was not on the ACPI and Power MLs back then) > > > Back then, one of the major rejections was that the functionality > > for setting charge thresholds should be integrated into the > > power supply stack somehow. I did not know who to contact back > > then, but know I re-read MAINTAINERS and found all your addresses, > > so I give it a second try. > > > > One issue with just integrating it in the current battery > > directories would be that ThinkPads are able to set charge > > thresholds for batteries that are currently not inserted. > > So the power supply device should be kept with > POWER_SUPPLY_PROP_PRESENT being disabled (and most properties > returning -ENODATA). The ACPI SBS driver seems to implement > POWER_SUPPLY_PROP_PRESENT, but I didn't test it. Yes, indeed. > > > Back then I wrote: > > > The next step is to integrate this properly with power supply > > > and/or acpi battery. One way would be to add additional power > > > supply properties and then add get/set_property() pointers to > > > the acpi battery which it can fall back to if it does not support > > > a requested property (and we would locate the ACPI battery and > > > set those pointers to new thinkpad_acpi functions). > > > > If you, the ACPI and power supply people, have any preferred > > way (or any idea at all how) to proceed, that would be useful, > > so I don't start working on it again, and then somebody does > > not like it. > > Adding charging thresholds as power_supply_property sounds > fine to me. > Right, it gets a bit more complicated though: Since the code is platform-specific, it should live in the platform driver, so a way is needed to extend the existing device with new properties from the platform driver. -- Julian Andres Klode - Debian Developer, Ubuntu Member See http://wiki.debian.org/JulianAndresKlode and http://jak-linux.org/. Be friendly, do not top-post, and follow RFC 1855 "Netiquette". - If you don't I might ignore you. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
