Author: Ivaylo Dimitrov Date: To: Pavel Machek CC: kernel list, linux-arm-kernel, linux-omap, tony, sre, nekit1000, mpartap, merlijn, martin_rysavy, phone-devel, maemo-leste Subject: Re: [maemo-leste] Motorola Droid 4 -- Stopping charger when battery
On 13.04.23 г. 12:34 ч., Pavel Machek wrote: > Hi!
>>> I complained that "battery life is very poor" with leste. It seems to
>>> be combination of several factors.
>>> 1) I was using very old battery
>>> 2) My charger is detected as "USB", not as "AC"
>> And this is because there is no working charger detection in the driver, so
>> initial current limit is hard-coded to 500mA.
> Aha, thanks, makes sense.
>>> According to my measurements "CPCAP_REG_CRM_FET_OVRD |
>>> CPCAP_REG_CRM_FET_CTRL" results in battery discharding and 0A drawn
>>> frmo the USB. "CPCAP_REG_CRM_FET_OVRD" is phone powered from USB,
>>> with battery more or less disconnected (<12mA), which is what we want
>>> in battery full situation.
>> What will happen if phone needs to draw more than N mA (N is the set charger
>> current limit)?
> We may run over the limit, AFAICT. I guess one solution would be to
> only do this when limit is high enough...
> With current setup, phone will not boot if battery is empty, so this
> needs quite urgent solution.
> I updated my leste, and now have:
> user@devuan-droid4:~/g/droid4-linux$ uname -a
> Linux devuan-droid4 6.1.9 #1 SMP PREEMPT Mon Mar 20 15:16:53 UTC 2023 armv7l GNU/Linux
> user@devuan-droid4:~/g$ apt show linux-image-omap
> Package: linux-image-omap
> Version: 22.214.171.124-1+m7
> Where can I find corresponding sources?