From: pavel@ucw.cz (Pavel Machek)
To: linux-arm-kernel@lists.infradead.org
Subject: bq2415x_charger.c: battery is discharged (fast, 224mA) when it should be charged
Date: Sun, 1 Feb 2015 21:56:03 +0100 [thread overview]
Message-ID: <20150201205603.GA23044@amd> (raw)
In-Reply-To: <20150201094702.GA21628@amd>
On Sun 2015-02-01 10:47:02, Pavel Machek wrote:
> Hi!
>
> I connected N900 with full battery using USB. For some reason, charge
> limit was set to 100mA, battery was "full" and was discharging:
>
> root at n900:/my/tui/ofone# ./tefone
> Ready.
> Battery 4.017 V 4.039 V 81 % 0 % 0 / 0 / 2056 mAh Full -242.224 / 550 / 100 mA
>
> I adjusted the current limit, but got no change, battery is still
> discharging, fast:
>
> root at n900:/my/tui/ofone# echo 500 > /sys/class/power_supply/bq24150a-0/current_limit
> root at n900:/my/tui/ofone# ./tefone
> Ready.
> Battery 3.994 V 4.034 V 78 % 0 % 0 / 0 / 2056 mAh Full -251.506 / 550 / 500 mA
> Battery 4.0 V 4.037 V 79 % 0 % 0 / 0 / 2056 mAh Full -223.125 / 550 / 500 mA
> Battery 4.005 V 4.037 V 79 % 0 % 0 / 0 / 2056 mAh Full -224.91 / 550 / 500 mA
> Battery 3.994 V 4.037 V 78 % 0 % 0 / 0 / 2056 mAh Full -224.91 / 550 / 500 mA
> Battery 4.023 V 4.037 V 81 % 0 % 0 / 0 / 2056 mAh Full -224.91 / 550 / 500 mA
> Battery 4.011 V 4.037 V 80 % 0 % 0 / 0 / 2056 mAh Full -224.91 / 550 / 500 mA
> Battery 3.994 V 4.031 V 78 % 0 % 0 / 0 / 2056 mAh Full -256.504 / 550 / 500 mA
> Battery 3.994 V 4.029 V 78 % 0 % 0 / 0 / 2056 mAh Full -224.017 / 550 / 500 mA
> Battery 3.988 V 4.029 V 77 % 0 % 0 / 0 / 2056 mAh Full -224.731 / 550 / 500 mA
> Battery 4.005 V 4.023 V 79 % 0 % 0 / 0 / 2056 mAh Full -223.66 / 550 / 500 mA
>
> I'm getting a lot of
>
> [ 208.037719] bq27x00-battery 2-0055: battery is not calibrated! ignoring capacity values
> [ 238.038024] bq27x00-battery 2-0055: battery is not calibrated! ignoring capacity values
>
> messages, that's why all the 0s in battery information dump.
>
> Any ideas?
Reset kicked the charger back into the charging mode:
root at n900:/sys/class/power_supply/bq24150a-0# echo reset > mode
root at n900:/sys/class/power_supply/bq24150a-0# cat mode
auto (host)
root at n900:/sys/class/power_supply/bq24150a-0#
Battery 4.017 V 4.037 V 81 % 0 % 0 / 0 / 2056 mAh Charging -109.42 / 650 / 500 mA
Battery 4.017 V 4.039 V 81 % 0 % 0 / 0 / 2056 mAh Charging -103.173 / 650 / 500 mA
...and discharge current reduced. I tried adjusting current limit, but
it still discharges at 100mA (with screen on).
USB extension cable was probably part of a problem. It works better
with n900 plugged in directly into the PC.
(But it still will not terminate the charge:
Battery 4.158 V 4.177 V 95 % 0 % 0 / 0 / 2056 mAh Charging 13.03 / 650 / 500 mA
Battery 4.164 V 4.177 V 96 % 0 % 0 / 0 / 2056 mAh Charging 13.03 / 650 / 500 mA
Battery 4.164 V 4.177 V 96 % 0 % 0 / 0 / 2056 mAh Charging 10.888 / 650 / 500 mA
Battery 4.164 V 4.177 V 96 % 0 % 0 / 0 / 2056 mAh Charging 1.249 / 650 / 500 mA
Battery 4.164 V 4.177 V 96 % 0 % 0 / 0 / 2056 mAh Charging 10.353 / 650 / 500 mA
Battery 4.158 V 4.177 V 95 % 0 % 0 / 0 / 2056 mAh Charging 9.639 / 650 / 500 mA
Battery 4.164 V 4.177 V 96 % 0 % 0 / 0 / 2056 mAh Charging 10.71 / 650 / 500 mA
Battery 4.164 V 4.177 V 96 % 0 % 0 / 0 / 2056 mAh Charging 7.497 / 650 / 500 mA
Battery 4.158 V 4.177 V 95 % 0 % 0 / 0 / 2056 mAh Charging 9.639 / 650 / 500 mA
Battery 4.164 V 4.177 V 96 % 0 % 0 / 0 / 2056 mAh Charging 6.247 / 650 / 500 mA
Battery 4.164 V 4.177 V 96 % 0 % 0 / 0 / 2056 mAh Charging 5.533 / 650 / 500 mA
Battery 4.164 V 4.177 V 96 % 0 % 0 / 0 / 2056 mAh Charging 4.284 / 650 / 500 mA
Battery 4.164 V 4.177 V 96 % 0 % 0 / 0 / 2056 mAh Charging 4.284 / 650 / 500 mA
Battery 4.164 V 4.177 V 96 % 0 % 0 / 0 / 2056 mAh Charging 3.927 / 650 / 500 mA
)
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
prev parent reply other threads:[~2015-02-01 20:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-01 9:47 bq2415x_charger.c: battery is discharged (fast, 224mA) when it should be charged Pavel Machek
2015-02-01 10:08 ` Pali Rohár
2015-02-01 11:38 ` Pavel Machek
2015-02-01 19:17 ` Pavel Machek
2015-02-01 20:56 ` Pavel Machek [this message]
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