From: Tony Lindgren <tony@atomide.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>,
kernel list <linux-kernel@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-omap@vger.kernel.org, sre@kernel.org, nekit1000@gmail.com,
mpartap@gmx.net, merlijn@wizzup.org, martin_rysavy@centrum.cz,
phone-devel@vger.kernel.org, maemo-leste@lists.dyne.org
Subject: Re: Motorola Droid 4 -- Stopping charger when battery is full
Date: Thu, 13 Apr 2023 12:45:44 +0300 [thread overview]
Message-ID: <20230413094544.GD36234@atomide.com> (raw)
In-Reply-To: <ZDfNRogC4ruBE4Xy@duo.ucw.cz>
* Pavel Machek <pavel@ucw.cz> [230413 09:37]:
>
> > * Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> [230307 14:10]:
> > > Also, some guys have concerns about charging (and keeping it charged) @4.35,
> > > because of the possibly reduced battery life.
> >
> > Yes for devices connected to a charger for long periods the battery will
> > bloat up within some weeks or months. This happens easily when using a
> > lapdock for example.
> >
> > A simple and safe solution here might be that we allow charging up to
> > 4.35V only once when the charger is connected. Then we let the voltage
> > decrease to 4.2V (or whatever known good maintenance voltage) if the
> > charger stays connected.
>
> Optimum solution would be user specifying "I want battery full
> tommorow at 8am" and doing the right thing.
I think you can already do that via sysfs with cron or at :)
> > For folks wanting to force the charge voltage higher we have the sysfs
> > interface.
>
> Yep, we just need to make sure it is usable for this.
It should be but I have not tried for years. You need to first configure
the allowed voltage for battery via sysfs, then set the charge voltage
for the charger.
Regards,
Tony
WARNING: multiple messages have this Message-ID (diff)
From: Tony Lindgren <tony@atomide.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>,
kernel list <linux-kernel@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-omap@vger.kernel.org, sre@kernel.org, nekit1000@gmail.com,
mpartap@gmx.net, merlijn@wizzup.org, martin_rysavy@centrum.cz,
phone-devel@vger.kernel.org, maemo-leste@lists.dyne.org
Subject: Re: Motorola Droid 4 -- Stopping charger when battery is full
Date: Thu, 13 Apr 2023 12:45:44 +0300 [thread overview]
Message-ID: <20230413094544.GD36234@atomide.com> (raw)
In-Reply-To: <ZDfNRogC4ruBE4Xy@duo.ucw.cz>
* Pavel Machek <pavel@ucw.cz> [230413 09:37]:
>
> > * Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> [230307 14:10]:
> > > Also, some guys have concerns about charging (and keeping it charged) @4.35,
> > > because of the possibly reduced battery life.
> >
> > Yes for devices connected to a charger for long periods the battery will
> > bloat up within some weeks or months. This happens easily when using a
> > lapdock for example.
> >
> > A simple and safe solution here might be that we allow charging up to
> > 4.35V only once when the charger is connected. Then we let the voltage
> > decrease to 4.2V (or whatever known good maintenance voltage) if the
> > charger stays connected.
>
> Optimum solution would be user specifying "I want battery full
> tommorow at 8am" and doing the right thing.
I think you can already do that via sysfs with cron or at :)
> > For folks wanting to force the charge voltage higher we have the sysfs
> > interface.
>
> Yep, we just need to make sure it is usable for this.
It should be but I have not tried for years. You need to first configure
the allowed voltage for battery via sysfs, then set the charge voltage
for the charger.
Regards,
Tony
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-04-13 9:46 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-07 12:36 Motorola Droid 4 -- Stopping charger when battery is full Pavel Machek
2023-03-07 12:36 ` Pavel Machek
2023-03-07 14:10 ` Ivaylo Dimitrov
2023-03-07 14:10 ` Ivaylo Dimitrov
2023-03-09 7:14 ` Tony Lindgren
2023-03-09 7:14 ` Tony Lindgren
2023-04-13 9:37 ` Pavel Machek
2023-04-13 9:37 ` Pavel Machek
2023-04-13 9:45 ` Tony Lindgren [this message]
2023-04-13 9:45 ` Tony Lindgren
2023-04-13 9:34 ` Pavel Machek
2023-04-13 9:34 ` Pavel Machek
2023-04-13 14:41 ` Ivaylo Dimitrov
2023-04-13 14:41 ` Ivaylo Dimitrov
2023-03-21 19:25 ` d4: Usable with some caveats Pavel Machek
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