* Pavel Machek <pavel@xxxxxx> [180501 18:33]: > Hi! > > 4.17-rc1 is quite usable on droid 4; basically everything > works. OHCI is running all the time, which means we burn a lot of > power needlessly. To work around that we can use n_gsm and and then suspend USB device. That will need the modem wake gpio working that I'll be sending patches for at some point. And we should make cdc_wdm, qcaux and ohci support runtime PM for autosuspend at some point. For *hci, we can make it work along what Roger did in his earlier series here except by using Linux generic wakeirq support: https://lkml.org/lkml/2013/7/10/355 > Anyway, >5.5hours of standby with screen off, GSM on is already > usable. Just to rub that in, you do mean GSM usable for voice calls and SMS with your unicsy_demo with mainline kernel plus the pending LCD related patches, right? :) > This is the core of code I'm using. > > https://github.com/pavelmachek/unicsy_demo > > Battery graphs are attached. I'm not sure if the battery was really > close to empty at that point -- voltage curve should have different > shape if that was the case. Cool. BTW, the value for POWER_SUPPLY_POWER_AVG should be quite accurate for the whole device power consumption. It comes from the shunt resistor measured by the PMIC. Sorry I don't remember how often it needs to be polled but I'm guessing polling it once a minute or so should be plenty. Hmm oh and the POWER_SUPPLY_CHARGE_COUNTER value should be monitored by your libbattery and it's low value and high value should be saved to a file. Low should be saved when we get the battery low interrupt and battery state changes to POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL. High value should be saved on POWER_SUPPLY_CAPACITY_LEVEL_FULL. Then when you know the high value and low value, you can calculate the remaining capacity based on the current value and POWER_SUPPLY_POWER_AVG. Regards, Tony -- 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
