From: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: kernel list <linux-kernel@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-omap@vger.kernel.org, tony@atomide.com, 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 17:41:23 +0300 [thread overview]
Message-ID: <6f3eb1b9-f6b8-f980-8fac-27b32bc1b7e6@gmail.com> (raw)
In-Reply-To: <ZDfMlfVDdSm8mXs0@duo.ucw.cz>
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: 6.1.8.0-1+m7
>
> Where can I find corresponding sources?
>
https://github.com/maemo-leste/droid4-linux/tree/maemo-6.1.y
> Best regards,
> Pavel
>
next prev parent reply other threads:[~2023-04-13 14:41 UTC|newest]
Thread overview: 8+ 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 14:10 ` Ivaylo Dimitrov
2023-03-09 7:14 ` Tony Lindgren
2023-04-13 9:37 ` Pavel Machek
2023-04-13 9:45 ` Tony Lindgren
2023-04-13 9:34 ` Pavel Machek
2023-04-13 14:41 ` Ivaylo Dimitrov [this message]
2023-03-21 19:25 ` d4: Usable with some caveats Pavel Machek
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