Date:   Tue, 29 Aug 2017 11:18:29 -0700
From:   Liam Breck <liam@...workimprov.net>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     Sebastian Reichel <sre@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>, kernel@...a-handheld.com
Subject: Re: dt-bindings: power: supply: bq27xxx: Add monitored-battery documentation

Hi Nikolaus, thanks for the testing report...

On Tue, Aug 29, 2017 at 7:24 AM, H. Nikolaus Schaller <hns@...delico.com> wrote:
> Hi Liam,
> seems to work as expected :)
>
> First boot:
>
> [    6.096336] bq27xxx_battery_settings
> [    6.097987] bq27xxx_battery_set_config
> [    6.097990] bq27xxx_battery_unseal
> [    6.107987] bq27xxx-battery 1-0055: update design-capacity to 6000
> [    6.107992] bq27xxx-battery 1-0055: update design-energy to 22200
> [    6.107997] bq27xxx-battery 1-0055: terminate-voltage has 3200
> [    6.382048] bq27xxx-battery 1-0055: cfgupdate 0, retries 7
> [    6.382054] bq27xxx_battery_seal
>
> Second boot (w/o removing battery in between):
>
> [    6.008883] bq27xxx_battery_settings
> [    6.013280] bq27xxx_battery_set_config
> [    6.018761] bq27xxx_battery_unseal
> [    6.050694] bq27xxx-battery 1-0055: design-capacity has 6000
> [    6.059913] bq27xxx-battery 1-0055: design-energy has 22200
> [    6.067113] bq27xxx-battery 1-0055: terminate-voltage has 3200
> [    6.075803] bq27xxx_battery_seal

I'd be interested to hear what happens after poweroff & boot (ie does
it retain config)?


> Third boot (with removing battery in between):
>
> [    6.161085] bq27xxx_battery_settings
> [    6.161162] bq27xxx_battery_set_config
> [    6.161165] bq27xxx_battery_unseal
> [    6.177904] bq27xxx-battery 1-0055: update design-capacity to 6000
> [    6.177909] bq27xxx-battery 1-0055: update design-energy to 22200
> [    6.177914] bq27xxx-battery 1-0055: terminate-voltage has 3200
> [    6.440592] bq27xxx-battery 1-0055: cfgupdate 0, retries 7
> [    6.440597] bq27xxx_battery_seal
>
> (I have added some printk to trace seal/unseal etc.)
>
> Values match the 6000mAh specified by DT:
>
>         bat: battery {
>                 compatible = "simple-battery", "pyra-battery";
>                 voltage-min-design-microvolt = <3200000>;
>                 energy-full-design-microwatt-hours = <22200000>;
>                 charge-full-design-microamp-hours = <6000000>;
>         };
>
> root@...ux:~# cat /sys/class/power_supply/bq27421-0/uevent
> POWER_SUPPLY_NAME=bq27421-0
> POWER_SUPPLY_STATUS=Discharging
> POWER_SUPPLY_PRESENT=1
> POWER_SUPPLY_VOLTAGE_NOW=3943000
> POWER_SUPPLY_CURRENT_NOW=-634000
> POWER_SUPPLY_CAPACITY=82
> POWER_SUPPLY_CAPACITY_LEVEL=Normal
> POWER_SUPPLY_TEMP=319
> POWER_SUPPLY_TECHNOLOGY=Li-ion
> POWER_SUPPLY_CHARGE_FULL=5467000
> POWER_SUPPLY_CHARGE_NOW=4611000
> POWER_SUPPLY_CHARGE_FULL_DESIGN=6000000
> POWER_SUPPLY_MANUFACTURER=Texas Instruments
> root@...ux:~#
>
> Anything else I should test?

Could you also test voltage-min-design-microvolt at 3177 to make sure
that's configurable too?

Sebastian just queued my series to -next. Would you be inclined to
submit a new patch enabling bq27421? If so, the sooner the better
since merge window is imminent :-)

Liam


>
>
>> Am 29.08.2017 um 12:40 schrieb Liam Breck <liam@...workimprov.net>:
>>
>> Hi Nikolaus,
>>
>> You need the patchset which enables this feature, which was delayed
>> for further work. It's now ready...
>>
>> https://patchwork.kernel.org/patch/9918947/
>> https://patchwork.kernel.org/patch/9918949/
>> https://patchwork.kernel.org/patch/9918951/
>> https://patchwork.kernel.org/patch/9918953/
>> https://patchwork.kernel.org/patch/9918955/
>>
>> And flip the #if 0 protecting bq27421_dm_regs
>>
>> I'd love to support that chip in this patchset if you can test
>> non-default settings for all 3 options this week?
>>
>> Thanks,
>> Liam
>>
>>
>> On Tue, Aug 29, 2017 at 2:43 AM, H. Nikolaus Schaller <hns@...delico.com> wrote:
>>> Hi,
>>> I am trying to get this working on our bq27421.
>>>
>>> But the only message I get is:
>>>
>>> [    6.086407] bq27xxx-battery 1-0055: data memory update not supported for chip
>>>
>>> A little research shows that this message comes from
>>>
>>>        http://elixir.free-electrons.com/linux/v4.13-rc7/source/drivers/power/supply/bq27xxx_battery.c#L1279
>>>
>>> So di->dm_regs is NULL.
>>>
>>> But doing an fgrep for dm_regs shows no line of code where the pointer is set to a non-null value:
>>>
>>> master hns$ fgrep -R dm_regs *
>>> drivers/power/supply/bq27xxx_battery.c: .class = (di)->dm_regs[i].subclass_id, \
>>> drivers/power/supply/bq27xxx_battery.c: .block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
>>> drivers/power/supply/bq27xxx_battery.c: struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
>>> drivers/power/supply/bq27xxx_battery.c: if (!di->dm_regs) {
>>> drivers/power/supply/bq27xxx_battery.c: max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
>>> drivers/power/supply/bq27xxx_battery.c: max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
>>> drivers/power/supply/bq27xxx_battery.c: min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
>>> drivers/power/supply/bq27xxx_battery.c: max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
>>> Binary file drivers/power/supply/bq27xxx_battery.ko matches
>>> Binary file drivers/power/supply/bq27xxx_battery.o matches
>>> Binary file drivers/power/supply/bq27xxx_battery_i2c.ko matches
>>> Binary file drivers/power/supply/bq27xxx_battery_i2c.o matches
>>> include/linux/power/bq27xxx_battery.h:  struct bq27xxx_dm_reg *dm_regs;
>>> master hns$
>>>
>>> What am I doing wrong here?
>>>
>>> BR and thanks,
>>> Nikolaus
>>>
>

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