Re: [PATCH v2] power: supply: bq27xxx: Supporrt CHARGE_NOW for bq27z561/bq28z610/bq34z100

From: Sebastian Reichel
Date: Sat Jan 16 2021 - 06:09:43 EST

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Hi,

On Wed, Dec 23, 2020 at 12:40:09AM +0000, Hermes Zhang wrote:
> On 12/22/20 7:53 PM, Pali Rohár wrote:
> > On Tuesday 22 December 2020 19:07:20 Hermes Zhang wrote:
> >> From: Hermes Zhang <chenhuiz@xxxxxxxx>
> >>
> >> The CHARGE_NOW is map to REG_NAC for all the gauge chips beofre. But for
> >> some chips (e.g. bq27z561) which doesn't have the REG_NAC, we use REG_RC
> >> (remaining capacity) for CHARGE_NOW.
> >>
> >> Signed-off-by: Hermes Zhang <chenhuiz@xxxxxxxx>
> >> ---
> >>
> >> Notes:
> >> Set correct REG_RC for all the chips if have
> >>
> >> keep INVALID_REG_ADDR for bq27521, as we could not find
> >> the datasheet and seems no one use it now.
> > This chip is used in Nokia N950 and Nokia N9. Pavel implemented kernel
> > support, adding to loop.
> >
> > Public information about it are at:
> > https://elinux.org/N950#sn27521_register_map
>
> Thanks for the info. From the link it seem bq27521 have neither NAC and
> RC register.

Thanks, I queued the patch to power-supply's for-next branch. (I reworded the
commit message, which was was hard to understand and had a few typos).

-- Sebastian

> Best Regards,
>
> Hermes
>
> >
> >> drivers/power/supply/bq27xxx_battery.c | 35 +++++++++++++++++++++++++-
> >> 1 file changed, 34 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
> >> index 315e0909e6a4..774aa376653e 100644
> >> --- a/drivers/power/supply/bq27xxx_battery.c
> >> +++ b/drivers/power/supply/bq27xxx_battery.c
> >> @@ -110,6 +110,7 @@ enum bq27xxx_reg_index {
> >> BQ27XXX_REG_TTES, /* Time-to-Empty Standby */
> >> BQ27XXX_REG_TTECP, /* Time-to-Empty at Constant Power */
> >> BQ27XXX_REG_NAC, /* Nominal Available Capacity */
> >> + BQ27XXX_REG_RC, /* Remaining Capacity */
> >> BQ27XXX_REG_FCC, /* Full Charge Capacity */
> >> BQ27XXX_REG_CYCT, /* Cycle Count */
> >> BQ27XXX_REG_AE, /* Available Energy */
> >> @@ -145,6 +146,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = 0x1c,
> >> [BQ27XXX_REG_TTECP] = 0x26,
> >> [BQ27XXX_REG_NAC] = 0x0c,
> >> + [BQ27XXX_REG_RC] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x2a,
> >> [BQ27XXX_REG_AE] = 0x22,
> >> @@ -169,6 +171,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = 0x1c,
> >> [BQ27XXX_REG_TTECP] = 0x26,
> >> [BQ27XXX_REG_NAC] = 0x0c,
> >> + [BQ27XXX_REG_RC] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x2a,
> >> [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
> >> @@ -193,6 +196,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = 0x1a,
> >> [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_NAC] = 0x0c,
> >> + [BQ27XXX_REG_RC] = 0x10,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x2a,
> >> [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
> >> @@ -215,6 +219,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = 0x1c,
> >> [BQ27XXX_REG_TTECP] = 0x26,
> >> [BQ27XXX_REG_NAC] = 0x0c,
> >> + [BQ27XXX_REG_RC] = 0x10,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x2a,
> >> [BQ27XXX_REG_AE] = 0x22,
> >> @@ -237,6 +242,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = 0x1a,
> >> [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_NAC] = 0x0c,
> >> + [BQ27XXX_REG_RC] = 0x10,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x1e,
> >> [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
> >> @@ -257,6 +263,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = 0x1c,
> >> [BQ27XXX_REG_TTECP] = 0x26,
> >> [BQ27XXX_REG_NAC] = 0x0c,
> >> + [BQ27XXX_REG_RC] = 0x10,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_AE] = 0x22,
> >> @@ -277,6 +284,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = 0x1c,
> >> [BQ27XXX_REG_TTECP] = 0x26,
> >> [BQ27XXX_REG_NAC] = 0x0c,
> >> + [BQ27XXX_REG_RC] = 0x10,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x2a,
> >> [BQ27XXX_REG_AE] = 0x22,
> >> @@ -297,6 +305,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = 0x1c,
> >> [BQ27XXX_REG_TTECP] = 0x26,
> >> [BQ27XXX_REG_NAC] = 0x0c,
> >> + [BQ27XXX_REG_RC] = 0x10,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x2a,
> >> [BQ27XXX_REG_AE] = 0x22,
> >> @@ -317,6 +326,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = 0x1c,
> >> [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_NAC] = 0x0c,
> >> + [BQ27XXX_REG_RC] = 0x10,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x1e,
> >> [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
> >> @@ -337,6 +347,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
> >> + [BQ27XXX_REG_RC] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_FCC] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
> >> @@ -361,6 +372,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_NAC] = 0x0c,
> >> + [BQ27XXX_REG_RC] = 0x10,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x2a,
> >> [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
> >> @@ -382,6 +394,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_NAC] = 0x0c,
> >> + [BQ27XXX_REG_RC] = 0x10,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x2a,
> >> [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
> >> @@ -405,6 +418,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_NAC] = 0x0c,
> >> + [BQ27XXX_REG_RC] = 0x10,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x2a,
> >> [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
> >> @@ -425,6 +439,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_NAC] = 0x08,
> >> + [BQ27XXX_REG_RC] = 0x0c,
> >> [BQ27XXX_REG_FCC] = 0x0e,
> >> [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
> >> @@ -450,6 +465,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
> >> + [BQ27XXX_REG_RC] = 0x10,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x2a,
> >> [BQ27XXX_REG_AE] = 0x22,
> >> @@ -470,6 +486,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
> >> + [BQ27XXX_REG_RC] = 0x10,
> >> [BQ27XXX_REG_FCC] = 0x12,
> >> [BQ27XXX_REG_CYCT] = 0x2a,
> >> [BQ27XXX_REG_AE] = 0x22,
> >> @@ -490,6 +507,7 @@ static u8
> >> [BQ27XXX_REG_TTES] = 0x1e,
> >> [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> >> [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
> >> + [BQ27XXX_REG_RC] = 0x04,
> >> [BQ27XXX_REG_FCC] = 0x06,
> >> [BQ27XXX_REG_CYCT] = 0x2c,
> >> [BQ27XXX_REG_AE] = 0x24,
> >> @@ -745,6 +763,7 @@ static enum power_supply_property bq27z561_props[] = {
> >> POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
> >> POWER_SUPPLY_PROP_TECHNOLOGY,
> >> POWER_SUPPLY_PROP_CHARGE_FULL,
> >> + POWER_SUPPLY_PROP_CHARGE_NOW,
> >> POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
> >> POWER_SUPPLY_PROP_CYCLE_COUNT,
> >> POWER_SUPPLY_PROP_POWER_AVG,
> >> @@ -764,6 +783,7 @@ static enum power_supply_property bq28z610_props[] = {
> >> POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
> >> POWER_SUPPLY_PROP_TECHNOLOGY,
> >> POWER_SUPPLY_PROP_CHARGE_FULL,
> >> + POWER_SUPPLY_PROP_CHARGE_NOW,
> >> POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
> >> POWER_SUPPLY_PROP_CYCLE_COUNT,
> >> POWER_SUPPLY_PROP_POWER_AVG,
> >> @@ -784,6 +804,7 @@ static enum power_supply_property bq34z100_props[] = {
> >> POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
> >> POWER_SUPPLY_PROP_TECHNOLOGY,
> >> POWER_SUPPLY_PROP_CHARGE_FULL,
> >> + POWER_SUPPLY_PROP_CHARGE_NOW,
> >> POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
> >> POWER_SUPPLY_PROP_CYCLE_COUNT,
> >> POWER_SUPPLY_PROP_ENERGY_NOW,
> >> @@ -1518,6 +1539,15 @@ static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
> >> return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
> >> }
> >>
> >> +/*
> >> + * Return the battery Remaining Capacity in µAh
> >> + * Or < 0 if something fails.
> >> + */
> >> +static inline int bq27xxx_battery_read_rc(struct bq27xxx_device_info *di)
> >> +{
> >> + return bq27xxx_battery_read_charge(di, BQ27XXX_REG_RC);
> >> +}
> >> +
> >> /*
> >> * Return the battery Full Charge Capacity in µAh
> >> * Or < 0 if something fails.
> >> @@ -1965,7 +1995,10 @@ static int bq27xxx_battery_get_property(struct power_supply *psy,
> >> val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
> >> break;
> >> case POWER_SUPPLY_PROP_CHARGE_NOW:
> >> - ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
> >> + if (di->regs[BQ27XXX_REG_NAC] != INVALID_REG_ADDR)
> >> + ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
> >> + else
> >> + ret = bq27xxx_simple_value(bq27xxx_battery_read_rc(di), val);
> >> break;
> >> case POWER_SUPPLY_PROP_CHARGE_FULL:
> >> ret = bq27xxx_simple_value(di->cache.charge_full, val);
> >> --
> >> 2.20.1
> >>
>

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