linux-kernel - Re: bq2415x_charger.c: battery is discharged (fast, 224mA) when it should be charged

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Date:	Sun, 1 Feb 2015 20:17:50 +0100
From:	Pavel Machek <pavel@....cz>
To:	Pali Rohár <pali.rohar@...il.com>
Cc:	sre@...nel.org, dbaryshkov@...il.com, dwmw2@...radead.org,
	linux-pm@...r.kernel.org, sre@...ian.org, sre@...g0.de,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
	aaro.koskinen@....fi, ivo.g.dimitrov.75@...il.com
Subject: Re: bq2415x_charger.c: battery is discharged (fast, 224mA) when it
 should be charged

On Sun 2015-02-01 12:38:13, Pavel Machek wrote:
> Hi!
> 
> On Sun 2015-02-01 11:08:16, Pali Rohár wrote:
> > On Sunday 01 February 2015 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:
> > > 
> > 
> > Make sure you have loaded some usb gadget. Without it battery 
> > charging via dedicated wallcharger (and probably also usb host 
> > charger) does not working. g_nokia should be OK.
> 
> I had that loaded (was running from root over USB at the moment.)
> 
> > Try also compiling kernel with CONFIG_USB_GADGET_VBUS_DRAW=500
> > 
> > Also for charger autodetection you need to have loaded 
> > isp1704_charer.ko module (or compiled into kernel).
> > 
> > And make sure that isp1704_charger is loaded before module 
> > bq2415x_charger (there is some probe defer, no idea if it works 
> > as excepted).
> 
> It seems bq2415x_charger is the problem: it all started working when I
> did echo reset > mode... 

It does not switch from "Full" to "Charging", and it does not seem to
switch from "Charging" to "Full", either...:

root@...0:/my/tui/ofone# ./tefone
Ready.
Battery  4.152 V  4.161 V  95 %  0 %  0 / 0 / 2056 mAh  Charging   40.876 / 650 / 500  mA
Battery  4.152 V  4.161 V  95 %  0 %  0 / 0 / 2056 mAh  Charging   48.195 / 650 / 500  mA
Battery  4.152 V  4.164 V  95 %  0 %  0 / 0 / 2056 mAh  Charging   43.554 / 650 / 500  mA
Battery  4.14 V  4.164 V  94 %  0 %  0 / 0 / 2056 mAh  Charging   40.162 / 650 / 500  mA
Battery  4.158 V  4.172 V  95 %  0 %  0 / 0 / 2056 mAh  Charging   54.621 / 650 / 500  mA
Battery  4.158 V  4.175 V  95 %  0 %  0 / 0 / 2056 mAh  Charging   33.736 / 650 / 500  mA
aHello, world
Battery  4.164 V  4.175 V  96 %  0 %  0 / 0 / 2056 mAh  Charging   2.142 / 650 / 500  mA
Battery  4.164 V  4.177 V  96 %  0 %  0 / 0 / 2056 mAh  Charging   19.992 / 650 / 500  mA
Battery  4.158 V  4.177 V  95 %  0 %  0 / 0 / 2056 mAh  Charging   18.207 / 650 / 500  mA
Battery  4.158 V  4.177 V  95 %  0 %  0 / 0 / 2056 mAh  Charging   17.493 / 650 / 500  mA
Battery  4.164 V  4.177 V  96 %  0 %  0 / 0 / 2056 mAh  Charging   16.243 / 650 / 500  mA
Battery  4.158 V  4.177 V  95 %  0 %  0 / 0 / 2056 mAh  Charging   16.243 / 650 / 500  mA


-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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