On Mon, Sep 27, 2010 at 6:38 PM, Grazvydas Ignotas <notasas@xxxxxxxxx> wrote: > On Mon, Sep 27, 2010 at 3:35 PM, Arun Murthy <arunrmurthy.83@xxxxxxxxx> wrote: >> On Mon, Sep 27, 2010 at 4:24 PM, Grazvydas Ignotas <notasas@xxxxxxxxx> wrote: >>> On Mon, Sep 27, 2010 at 10:21 AM, Arun Murthy <arunrmurthy.83@xxxxxxxxx> wrote: >>> The problem is that BCI is only active while charging, when it is not >>> charging most (all?) monitoring registers freeze and no monitoring >>> happens (BCI registers read frozen values from last charge). So I >>> don't register battery as it has no useful data to report. I heard it >>> is possible to use MADC to perform monitoring while not charging, so >>> battery can be added when MADC driver is merged and corresponding code >>> is written for this driver. >>> >> How do I check the battery voltage? >> I need to check the battery voltage/current/temp and, if I am not >> wrong these are obtained from MADC. >> MADC driver has to be added first and then the battery. >> With being able to read the basic parameter battery voltage, this >> driver becomes incomplete. > > Incomplete driver is better than no driver, don't you think? There are > some boards like pandora or oswald that have additional battery > monitoring chips (as twl monitoring is pretty crude anyway), those > boards would have fully functional charging now. Currently mainline > kernel is not very useful with them simply because the battery runs > flat. I agree, but I feel it would be better to make driver compatible with all boards(Zoom2, OMAP3430SDP, Chameleon, BeagleBoard etc). Even support for back-up battery is not supported. This is just a suggestion to have a full fledged driver for twl4030 Battery Charger Interface as a module. You may discard this if you have some strong reasons. > >> How do I get notified if battery voltage is low and needs charging >> from user space? > > Either additional monitoring chip notifies you (if you are lucky and > have one), or wait for update of this driver :) There are efforts to > merge MADC driver [1], but it may take some time. But using MADC, I can get the battery voltage and by means of monitoring battery voltage we can get to know low battery notification. > > [1] http://marc.info/?t=128461535700002&r=1&w=2 > Thanks and Regards, Arun R Murthy -------------------- -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
