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authorH. Nikolaus Schaller <hns@goldelico.com>2015-12-17 11:12:53 +0100
committerSebastian Reichel <sre@kernel.org>2016-01-07 16:38:24 +0100
commit549d7b317c761dbf4ed0c2945aec3acc9ca7ae14 (patch)
tree08797c153ee4df1e52665349b2e02e78718e9178 /drivers/power
parentf96576bd63e5b9a7a9c33a7fc4209fffc4d433cc (diff)
downloadlinux-549d7b317c761dbf4ed0c2945aec3acc9ca7ae14.tar.bz2
power: bq27xxx: fix reading for bq27000 and bq27010
bug: the driver reports funny capacity values: root@letux:/sys/class/power_supply/bq27000-battery# cat uevent POWER_SUPPLY_NAME=bq27000-battery POWER_SUPPLY_STATUS=Charging POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_VOLTAGE_NOW=3702000 POWER_SUPPLY_CURRENT_NOW=-464635 POWER_SUPPLY_CAPACITY=1536 <- over 100% is magic POWER_SUPPLY_CAPACITY_LEVEL=Normal POWER_SUPPLY_TEMP=311 POWER_SUPPLY_TIME_TO_FULL_NOW=10440 POWER_SUPPLY_TECHNOLOGY=Li-ion POWER_SUPPLY_CHARGE_FULL=805450 POWER_SUPPLY_CHARGE_NOW=1068 POWER_SUPPLY_CHARGE_FULL_DESIGN=8844998 <- battery has just 1200 mAh POWER_SUPPLY_CYCLE_COUNT=21 POWER_SUPPLY_ENERGY_NOW=0 POWER_SUPPLY_POWER_AVG=0 POWER_SUPPLY_HEALTH=Good POWER_SUPPLY_MANUFACTURER=Texas Instruments reason: the state of charge and the design capacity register are single byte only. The design capacity returns the higer order byte. tested: GTA04 with Openmoko/FIC HF08x battery (using hdq) Fixes: d74534c27775 ("power: bq27xxx_battery: Add support for additional bq27xxx family devices") Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com> Acked-by: Andrew F. Davis <afd@ti.com> Reviewed-by: Pali Rohár <pali.rohar@gmail.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/bq27xxx_battery.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/power/bq27xxx_battery.c b/drivers/power/bq27xxx_battery.c
index 8d4ef9fd9b6e..0b95542e286f 100644
--- a/drivers/power/bq27xxx_battery.c
+++ b/drivers/power/bq27xxx_battery.c
@@ -428,7 +428,10 @@ static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
{
int soc;
- soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
+ if (di->chip == BQ27000 || di->chip == BQ27010)
+ soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
+ else
+ soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
if (soc < 0)
dev_dbg(di->dev, "error reading State-of-Charge\n");
@@ -493,7 +496,10 @@ static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
{
int dcap;
- dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
+ if (di->chip == BQ27000 || di->chip == BQ27010)
+ dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
+ else
+ dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
if (dcap < 0) {
dev_dbg(di->dev, "error reading initial last measured discharge\n");
@@ -501,7 +507,7 @@ static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
}
if (di->chip == BQ27000 || di->chip == BQ27010)
- dcap *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
+ dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
else
dcap *= 1000;