linux-kernel - Re: 4.5-rc0: n900 battery charging reverts to 100mA, indicator turns back on

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Message-Id: <201601212034.07727@pali>
Date:	Thu, 21 Jan 2016 20:34:07 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Pavel Machek <pavel@....cz>,
	kernel list <linux-kernel@...r.kernel.org>
Cc:	"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,
	patrikbachan@...il.com, serge@...lyn.com, sre@...nel.org
Subject: Re: 4.5-rc0: n900 battery charging reverts to 100mA, indicator turns back on

On Thursday 21 January 2016 19:42:34 Pavel Machek wrote:
> Hi!
> 
> In 4.4, n900 battery charging works. If indicator is turned off, it
> stays off, and if I select 1.8A charge, it sticks. (There may be
> problems after system suspend and resume. But normal operation seems
> to be pretty reliable).

Hm... right, bq2415x driver does not have support for suspend/resume. 
Before suspend registers should be stored and after resume restored, 
plus check charger auto detection.

> In 4.5-rc0 (7fdec82af6a9e190e53d07a1463d2a9ac49a8750) battery
> charging works for few hours. But then indicator (yellow light on
> 3color LED) turns back on, and if I ask for 1.8A charge, it goes
> back to .1A, discharging battery.
> 
> Any ideas?

Look into bq24150a sysfs node what changes. Also if there is something 
in dmesg.

> Best regards,
> 									Pavel


-- 
Pali Rohár
pali.rohar@...il.com

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