RE: [PATCH V4 2/2] power: supply: bq27xxx: Add support for BQ78Z100

From: LI Qingwu
Date: Fri Mar 05 2021 - 01:57:14 EST

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Hi Sebastian,

Thanks a lot for your input, I changed according your input in PATCH V5, please review.
About "why 0x00000000 instead of just '0' like in the other entries?", since I got an error from checkpatch.pl.

ERROR: space prohibited before that ',' (ctx:WxW)
#100: FILE: drivers/power/supply/bq27xxx_battery.c:1015:
+ [BQ78Z100] = BQ27XXX_DATA(bq78z100, 0 , BQ27Z561_O_BITS),
^

Best Regards

**********************************************
Li Qingwu (Terry)
Senior Embedded Software Engineer
Leica Geosystems(Shanghai)Co.,Limited
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**********************************************

-----Original Message-----
From: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
Sent: Wednesday, March 3, 2021 12:22 AM
To: LI Qingwu <qing-wu.li@xxxxxxxxxxxxxxxxxxxxxxx>
Cc: robh+dt@xxxxxxxxxx; dmurphy@xxxxxx; pali@xxxxxxxxxx; krzk@xxxxxxxxxx; linux-pm@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; TERTYCHNYI Grygorii <grygorii.tertychnyi@xxxxxxxxxxxxxxxxxxxx>; ZHIZHIKIN Andrey <andrey.zhizhikin@xxxxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH V4 2/2] power: supply: bq27xxx: Add support for BQ78Z100

Hi,

On Fri, Feb 05, 2021 at 07:10:04AM +0000, LI Qingwu wrote:
> Add support for TI BQ78Z100, I2C interface gas gauge.
> It provides a fully integrated safety protection and authentication
> for 1 to 2-series cell Li-Ion and Li-Polymer battery packs.
>
> The patch was tested with BQ78Z100 equipment.
>
> Reviewed-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
> Signed-off-by: LI Qingwu <Qing-wu.Li@xxxxxxxxxxxxxxxxxxxxxxx>
> ---
> drivers/power/supply/bq27xxx_battery.c | 46 +++++++++++++++++++++-
> drivers/power/supply/bq27xxx_battery_i2c.c | 2 +
> include/linux/power/bq27xxx_battery.h | 1 +
> 3 files changed, 48 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/power/supply/bq27xxx_battery.c
> b/drivers/power/supply/bq27xxx_battery.c
> index 315e0909e6a4..c8579ec7a4f8 100644
> --- a/drivers/power/supply/bq27xxx_battery.c
> +++ b/drivers/power/supply/bq27xxx_battery.c
> @@ -39,6 +39,7 @@
> * https://www.ti.com/product/bq27z561
> * https://www.ti.com/product/bq28z610
> * https://www.ti.com/product/bq34z100-g1
> + * https://www.ti.com/product/bq78z100
> */
>
> #include <linux/device.h>
> @@ -497,7 +498,27 @@ static u8
> [BQ27XXX_REG_DCAP] = 0x3c,
> [BQ27XXX_REG_AP] = 0x22,
> BQ27XXX_DM_REG_ROWS,
> - };
> + },
> + bq78z100_regs[BQ27XXX_REG_MAX] = {
> + [BQ27XXX_REG_CTRL] = 0x00,
> + [BQ27XXX_REG_TEMP] = 0x06,
> + [BQ27XXX_REG_INT_TEMP] = 0x28,
> + [BQ27XXX_REG_VOLT] = 0x08,
> + [BQ27XXX_REG_AI] = 0x14,
> + [BQ27XXX_REG_FLAGS] = 0x0a,
> + [BQ27XXX_REG_TTE] = 0x16,
> + [BQ27XXX_REG_TTF] = 0x18,
> + [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,

Datasheet states StandbyTimeToEmpty = 0x1C?

> + [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> + [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,

missing BQ27XXX_REG_RC. Looks like chip has support for it at address 0x10.

> + [BQ27XXX_REG_FCC] = 0x12,
> + [BQ27XXX_REG_CYCT] = 0x2a,
> + [BQ27XXX_REG_AE] = 0x22,

REG_AE is available energy. REG_AP is average power. Obviously two completley different things and cannot be the same register.
A quick glance at the datasheet suggests AE does not exist.

> + [BQ27XXX_REG_SOC] = 0x2c,
> + [BQ27XXX_REG_DCAP] = 0x3c,
> + [BQ27XXX_REG_AP] = 0x22,
> + BQ27XXX_DM_REG_ROWS,
> +};

Please fix indention of };

>
> static enum power_supply_property bq27000_props[] = {
> POWER_SUPPLY_PROP_STATUS,
> @@ -792,6 +813,27 @@ static enum power_supply_property bq34z100_props[] = {
> POWER_SUPPLY_PROP_MANUFACTURER,
> };
>
> +static enum power_supply_property bq78z100_props[] = {
> + POWER_SUPPLY_PROP_STATUS,
> + POWER_SUPPLY_PROP_PRESENT,
> + POWER_SUPPLY_PROP_VOLTAGE_NOW,
> + POWER_SUPPLY_PROP_CURRENT_NOW,
> + POWER_SUPPLY_PROP_CAPACITY,
> + POWER_SUPPLY_PROP_CAPACITY_LEVEL,
> + POWER_SUPPLY_PROP_TEMP,
> + POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
> + POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,

You are not providing data for this? (BQ27XXX_REG_TTECP is not set).
Please revisit the list of exposed properties and provide a dump of /sys/class/power_supply/<your_battery>/uevent in your submission.
Currently you should see some -ENODATA.

> + POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
> + POWER_SUPPLY_PROP_TECHNOLOGY,
> + POWER_SUPPLY_PROP_CHARGE_FULL,
> + POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
> + POWER_SUPPLY_PROP_CYCLE_COUNT,
> + POWER_SUPPLY_PROP_ENERGY_NOW,
> + POWER_SUPPLY_PROP_POWER_AVG,
> + POWER_SUPPLY_PROP_HEALTH,
> + POWER_SUPPLY_PROP_MANUFACTURER,
> +};
> +
> struct bq27xxx_dm_reg {
> u8 subclass_id;
> u8 offset;
> @@ -890,6 +932,7 @@ static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
> #define bq27z561_dm_regs 0 #define bq28z610_dm_regs 0 #define
> bq34z100_dm_regs 0
> +#define bq78z100_dm_regs 0
>
> #define BQ27XXX_O_ZERO BIT(0)
> #define BQ27XXX_O_OTDC BIT(1) /* has OTC/OTD overtemperature flags */
> @@ -948,6 +991,7 @@ static struct {
> [BQ28Z610] = BQ27XXX_DATA(bq28z610, 0 , BQ27Z561_O_BITS),
> [BQ34Z100] = BQ27XXX_DATA(bq34z100, 0 , BQ27XXX_O_OTDC | BQ27XXX_O_SOC_SI | \
> BQ27XXX_O_HAS_CI | BQ27XXX_O_MUL_CHEM),
> + [BQ78Z100] = BQ27XXX_DATA(bq78z100, 0x00000000, BQ27Z561_O_BITS),

why 0x00000000 instead of just '0' like in the other entries?

> };
>
> static DEFINE_MUTEX(bq27xxx_list_lock); diff --git
> a/drivers/power/supply/bq27xxx_battery_i2c.c
> b/drivers/power/supply/bq27xxx_battery_i2c.c
> index eb4f4284982f..46f078350fd3 100644
> --- a/drivers/power/supply/bq27xxx_battery_i2c.c
> +++ b/drivers/power/supply/bq27xxx_battery_i2c.c
> @@ -248,6 +248,7 @@ static const struct i2c_device_id bq27xxx_i2c_id_table[] = {
> { "bq27z561", BQ27Z561 },
> { "bq28z610", BQ28Z610 },
> { "bq34z100", BQ34Z100 },
> + { "bq78z100", BQ78Z100 },
> {},
> };
> MODULE_DEVICE_TABLE(i2c, bq27xxx_i2c_id_table); @@ -284,6 +285,7 @@
> static const struct of_device_id bq27xxx_battery_i2c_of_match_table[] = {
> { .compatible = "ti,bq27z561" },
> { .compatible = "ti,bq28z610" },
> { .compatible = "ti,bq34z100" },
> + { .compatible = "ti,bq78z100" },
> {},
> };
> MODULE_DEVICE_TABLE(of, bq27xxx_battery_i2c_of_match_table);
> diff --git a/include/linux/power/bq27xxx_battery.h
> b/include/linux/power/bq27xxx_battery.h
> index 111a40d0d3d5..ac17618043b1 100644
> --- a/include/linux/power/bq27xxx_battery.h
> +++ b/include/linux/power/bq27xxx_battery.h
> @@ -33,6 +33,7 @@ enum bq27xxx_chip {
> BQ27Z561,
> BQ28Z610,
> BQ34Z100,
> + BQ78Z100,
> };
>
> struct bq27xxx_device_info;

Thanks,

-- Sebastian

Next message: Jiaxun Yang: "Re: [PATCH] MIPS: Support large stack."
Previous message: Jiapeng Chong: "[PATCH] power: supply: cpcap-charger: Remove unnecessary conversion to bool"
In reply to: Sebastian Reichel: "Re: [PATCH V4 2/2] power: supply: bq27xxx: Add support for BQ78Z100"
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