RE: [PATCH V5 0/2] power: bq27xxx: add bq78z100

Hi Sebastian,

Here is the dump of the "uevent", I tested two cases, discharging current >0 and discharging current =0.
If discharging current=0:
    POWER_SUPPLY_TIME_TO_EMPTY_NOW and POWER_SUPPLY_TIME_TO_FULL_NOW are disappear, 
    the value is "-ENODATA"
If discharging current>0:
    POWER_SUPPLY_TIME_TO_FULL_NOW is disappear, 
    the value is "-ENODATA"
Since I can't test charging on our hardware, I think "POWER_SUPPLY_TIME_TO_FULL_NOW" will show up during charging, since the value is given by register 0x18 with index "BQ27XXX_REG_TTF".

TEST CASE I:  discharging current >0:
    POWER_SUPPLY_NAME=bq78z100-0
    POWER_SUPPLY_STATUS=Discharging
    POWER_SUPPLY_PRESENT=1
    POWER_SUPPLY_VOLTAGE_NOW=3405000
    POWER_SUPPLY_CURRENT_NOW=4000
    POWER_SUPPLY_CAPACITY=28
    POWER_SUPPLY_CAPACITY_LEVEL=Normal
    POWER_SUPPLY_TEMP=259
    POWER_SUPPLY_TIME_TO_EMPTY_NOW=1611000
    POWER_SUPPLY_TECHNOLOGY=Li-ion
    POWER_SUPPLY_CHARGE_FULL=6494000
    POWER_SUPPLY_CHARGE_FULL_DESIGN=6000000
    POWER_SUPPLY_CYCLE_COUNT=1
    POWER_SUPPLY_ENERGY_NOW=0
    POWER_SUPPLY_POWER_AVG=65535
    POWER_SUPPLY_HEALTH=Good
    POWER_SUPPLY_MANUFACTURER=Texas Instruments

TEST CASE II : discharging current =0:
    POWER_SUPPLY_NAME=bq78z100-0
    POWER_SUPPLY_STATUS=Discharging
    POWER_SUPPLY_PRESENT=1
    POWER_SUPPLY_VOLTAGE_NOW=3405000
    POWER_SUPPLY_CURRENT_NOW=0
    POWER_SUPPLY_CAPACITY=28
    POWER_SUPPLY_CAPACITY_LEVEL=Normal
    POWER_SUPPLY_TEMP=260
    POWER_SUPPLY_TECHNOLOGY=Li-ion
    POWER_SUPPLY_CHARGE_FULL=6494000
    POWER_SUPPLY_CHARGE_FULL_DESIGN=6000000
    POWER_SUPPLY_CYCLE_COUNT=1
    POWER_SUPPLY_ENERGY_NOW=0
    POWER_SUPPLY_POWER_AVG=0
    POWER_SUPPLY_HEALTH=Good
    POWER_SUPPLY_MANUFACTURER=Texas Instruments



Best Regards

Li Qingwu (Terry)


Best Regards

Li Qingwu (Terry)




-----Original Message-----
From: Sebastian Reichel <sre@kernel.org> 
Sent: Monday, March 15, 2021 7:42 AM
To: LI Qingwu <redacted>
Cc: robh+dt@kernel.org; pali@kernel.org; krzk@kernel.org; afd@ti.com; linux-pm@vger.kernel.org; devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; TERTYCHNYI Grygorii <redacted>; ZHIZHIKIN Andrey <redacted>
Subject: Re: [PATCH V5 0/2] power: bq27xxx: add bq78z100

Hi,

On Fri, Mar 05, 2021 at 06:49:47AM +0000, LI Qingwu wrote:

Changes in V5:

1. Change [BQ27XXX_REG_TTES] from INVALID_REG_ADDR to 0x1c, the 
StandbyTimeToEmpty command of bq78z100.
2. Add [BQ27XXX_REG_RC] = 0x10. the RemainingCapacity command of 
bq78z100.
3. Set [BQ27XXX_REG_AE] to INVALID_REG_ADDR, support by bq78z100.
4. Delete property POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, not support by 
bq78z100

I also asked to check other exposed properties and to provide a dump of the power-supply uevent in commit message or cover letter to verify chip works as expected. I cannot see the dump and you are exposing at least one property that always reports -ENODATA. I intentionally will not point out the exact property, so that you have to properly test your patch before submitting.

Thanks,

-- Sebastian

LI Qingwu (2):
  dt-bindings: power: bq27xxx: add bq78z100
  power: supply: bq27xxx: Add support for BQ78Z100

 .../bindings/power/supply/bq27xxx.yaml        |  1 +
 drivers/power/supply/bq27xxx_battery.c        | 44 +++++++++++++++++++
 drivers/power/supply/bq27xxx_battery_i2c.c    |  2 +
 include/linux/power/bq27xxx_battery.h         |  1 +
 4 files changed, 48 insertions(+)

--
2.17.1