[SOLVED] A20 Lime2 4Gb : Battery compatibility

[LittleScarabee]

Hello

I bought my battery on eBay : 8000 mah and I use this OS : ARMbian Vanilla version.
When this battery is connected to my Olimex A20 I can have these information's at the first boot :

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olimex@LUIGI:~$ sudo cat /sys/devices/platform/soc@01c00000/1c2ac00.i2c/i2c-0/0-0034/battery/charge
-8100
olimex@LUIGI:~$ sudo cat /sys/devices/platform/soc@01c00000/1c2ac00.i2c/i2c-0/0-0034/battery/amperage
221500


After 1 hour, I can have these information's :

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olimex@LUIGI:~$ sudo cat /sys/devices/platform/soc@01c00000/1c2ac00.i2c/i2c-0/0-0034/battery/charge
-408234
olimex@LUIGI:~$ sudo cat /sys/devices/platform/soc@01c00000/1c2ac00.i2c/i2c-0/0-0034/battery/amperage
219500


How I can interpret these values ? I have no more information's.
Does the battery sold by Olimex provide more information's ?

My goal it's to have to calculate the remaining time for my battery

Thanks for your help.

[JohnS]

At a glance looks like a bug in Linux (armbian/driver/...)

John

[LittleScarabee]

Thanks John I will post my question on this forum.

I hope to have a solution, because the official linux distribution provide by Olimex doesn't boot (Debian Jessie release 5 )...but after check , by writing this message : I saw a new release >> Release 6...I will test it now...

I'll keep you informed...

[LittleScarabee]

At a glance looks like a bug in Linux (armbian/driver/...)

John

Hi

You are right : it's a but ! After test Debian Jessie release 6 > I can see my battery, but I'm still locked at the same step : cannot configure the fed file ! no tools available to do it. ARMbian cannot manage battery LiPo, it's a pity !

[LittleScarabee]

At a glance looks like a bug in Linux (armbian/driver/...)

John

After check on ARMbian forum : this feature was disable ! It didn't work as expected, it's a pity !

[igorpec]

Last time I was checking on this it was working - we could retrieve battery information in Vanilla kernel, but that's all what you can do at the moment.

After check on ARMbian forum : this feature was disable ! It didn't work as expected, it's a pity !

Where exactly did you find this info?

Check this:
http://forum.armbian.com/index.php/topic/611-wip-axp209-mainline-sysfs-interface/

[LittleScarabee]

Where exactly did you find this info?

Hi Igor
I found this information here : http://forum.armbian.com/index.php/topic/234-olimex-lime2-battery-support/?hl=%2Blime2.bin+%2Bbattery
This is a misunderstanding on my part?

Check this:
http://forum.armbian.com/index.php/topic/611-wip-axp209-mainline-sysfs-interface/

Thanks I'll check that.

[igorpec]

I found this information here : http://forum.armbian.com/index.php/topic/234-olimex-lime2-battery-support/?hl=%2Blime2.bin+%2Bbattery
This is a misunderstanding on my part?

That's an old info. It was fixed in the mean time. Here is the patch if you want to DIY:
https://github.com/igorpecovnik/lib/blob/master/patch/kernel/sunxi-next/axp20x-sysfs-interface.patch

Otherwise its built in our recent kernel by default.

[LittleScarabee]

Check this:
http://forum.armbian.com/index.php/topic/611-wip-axp209-mainline-sysfs-interface/

Hi Igor

I checked this link :
- When my battery is connected and I use a power supply 5V / 1,5A : the battery doesn't fo in charging phase
- When my battery is connected and I user power supply 5V / 2A via USB OTG : the battery doesn't fo in charging phase

And I've got this result :

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root@LUIGI:~# cat /sys/power/axp_pmu/battery/amperage
0
root@LUIGI:~# cat /sys/power/axp_pmu/battery/capacity
0
root@LUIGI:~# cat /sys/power/axp_pmu/battery/charge
0
root@LUIGI:~# cat /sys/power/axp_pmu/battery/charging
0
root@LUIGI:~# cat /sys/power/axp_pmu/battery/connected
1
root@LUIGI:~# cat /sys/power/axp_pmu/battery/power
0
root@LUIGI:~# cat /sys/power/axp_pmu/battery/ts_voltage
0
root@LUIGI:~# cat /sys/power/axp_pmu/battery/voltage
0


And on the boot I still got this status :

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root@LUIGI:~# dmesg | grep axp
[    3.771491] axp20x 0-0034: AXP20x variant AXP209 found
[    3.784942] input: axp20x-pek as /devices/platform/soc@01c00000/1c2ac00.i2c/i2c-0/0-0034/axp20x-pek/input/input0
[    3.791967] axp20x 0-0034: Battery detection is disabled, enabling
[    3.792715] axp20x 0-0034: Backup (RTC) battery charging is disabled
[    3.792941] axp20x 0-0034: AXP20X driver loaded


My release is (Vanilla Jessie server 5.10) :

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root@LUIGI:~# cat /proc/version
Linux version 4.5.5-sunxi (root@pluton) (gcc version 5.3.1 20160413 (Ubuntu/Linaro 5.3.1-14ubuntu2) ) #10 SMP Mon May 23 22:10:54 CEST 2016

root@LUIGI:~# lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 8.5 (jessie)
Release: 8.5
Codename: jessie


Do you know where is my problem ?

I saw a new release : 5.14 ! I'll test it.
Thanks

[LittleScarabee]

I found this information here : http://forum.armbian.com/index.php/topic/234-olimex-lime2-battery-support/?hl=%2Blime2.bin+%2Bbattery
This is a misunderstanding on my part?

That's an old info. It was fixed in the mean time. Here is the patch if you want to DIY:
https://github.com/igorpecovnik/lib/blob/master/patch/kernel/sunxi-next/axp20x-sysfs-interface.patch

Otherwise its built in our recent kernel by default.

Hi

I tested the last release "Xenial Server 5.14" > same problem
I've got this information on startup :

Code Select Expand


root@lime2:~# dmesg | grep axp
[    4.721639] axp20x-i2c 0-0034: AXP20x variant AXP209 found
[    4.740780] input: axp20x-pek as /devices/platform/soc@01c00000/1c2ac00.i2c/i2c-0/0-0034/axp20x-pek/input/input0
[    4.752024] ldo1: supplied by axp-ipsout
[    4.757262] ldo2: supplied by axp-ipsout
[    4.761971] ldo3: supplied by axp-ipsout
[    4.766239] ldo4: supplied by axp-ipsout
[    4.771651] dcdc2: supplied by axp-ipsout
[    4.776501] dcdc3: supplied by axp-ipsout
[    4.782804] axp20x-i2c 0-0034: Battery detection is disabled, enabling
[    4.790129] axp20x-i2c 0-0034: Backup (RTC) battery charging is disabled
[    4.797090] axp20x-i2c 0-0034: AXP20X driver loaded


Any idea ?
Thanks

[igorpec]

Than I guess my knowing is also not updated, perhaps this is broken again. Best is to open an issue (copy/paste your findings) and wait that author come up with ideas or fix it. I know that driver has limited functionality at this point - I think only battery voltage reading is operational, the rest is waiting to be done.

[LittleScarabee]

Hi Igor,

Thanks. I created an issue on the tracker.
Pending this result : I installed the last official release provided by Olimex and its works as expected : I can monitor my battery and charge my battery via my Olimex

I hope to have a solution for ARMbian system.

Cheers

[igorpec]

Hi Igor,

Thanks. I created an issue on the tracker.
Pending this result : I installed the last official release provided by Olimex and its works as expected : I can monitor my battery and charge my battery via my Olimex

I hope to have a solution for ARMbian system.

Cheers

Battery monitoring works fine with Armbian legacy kernel (3.4.112), the exact same way as on stock images, while "ARMbian Vanilla version" uses modern (4.6.2 currently) kernel. One of the core crew made the driver and since it's not done, you won't find it elsewhere.

[LittleScarabee]

Battery monitoring works fine with Armbian legacy kernel (3.4.112), the exact same way as on stock images, while "ARMbian Vanilla version" uses modern (4.6.2 currently) kernel. One of the core crew made the driver and since it's not done, you won't find it elsewhere.

Yes its works. Thanks for this information.