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

From: Hermes Zhang
Date: Tue Dec 22 2020 - 06:08:44 EST

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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.

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

Next message: Jan Kara: "[PATCH] quota: Fix memory leak when handling corrupted quota file"
Previous message: Masami Hiramatsu: "Re: [PATCH] kretprobe: avoid re-registration of the same kretprobe earlier"
Next in thread: Pali Rohár: "Re: [PATCH v2] power: supply: bq27xxx: Supporrt CHARGE_NOW for bq27z561/bq28z610/bq34z100"
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