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SubjectRe: [PATCH 2/2] power: supply: max17042_battery: add technology property support
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Krzysztof Kozlowski writes:

> On Sun, Sep 25, 2016 at 11:10:11PM +0200, Wolfgang Wiedmeyer wrote:
>> This patch reports the battery technology as Li-ion.
>>
>> Signed-off-by: Wolfgang Wiedmeyer <wolfgit@wiedmeyer.de>
>> ---
>> drivers/power/max17042_battery.c | 4 ++++
>> 1 file changed, 4 insertions(+)
>>
>> diff --git a/drivers/power/max17042_battery.c b/drivers/power/max17042_battery.c
>> index 20cb1fd..43cb5df 100644
>> --- a/drivers/power/max17042_battery.c
>> +++ b/drivers/power/max17042_battery.c
>> @@ -92,6 +92,7 @@ static enum power_supply_property max17042_battery_props[] = {
>> POWER_SUPPLY_PROP_TEMP_MIN,
>> POWER_SUPPLY_PROP_TEMP_MAX,
>> POWER_SUPPLY_PROP_HEALTH,
>> + POWER_SUPPLY_PROP_TECHNOLOGY,
>> POWER_SUPPLY_PROP_CURRENT_NOW,
>> POWER_SUPPLY_PROP_CURRENT_AVG,
>> };
>> @@ -296,6 +297,9 @@ static int max17042_get_property(struct power_supply *psy,
>> if (ret < 0)
>> return ret;
>> break;
>> + case POWER_SUPPLY_PROP_TECHNOLOGY:
>> + val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
>
> How can you be sure it is always Li-Ion? For wearables and mobiles, rather yes, but
> the driver is also used in other devices. Technically, specs are saying
> it might be used also with Li-Poly applications.

I suppose that there is no way to detect this. Would it be ok if I add
an optional Device Tree property that allows to specify if it's Li-Ion
or Li-Poly? If the property is not supplied, then "unknown" is returned.

Thanks,
Wolfgang

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