UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

power:bq27xxx: 27000/10 read FLAGS register as single 

The bq27000 and bq27010 have a single byte FLAGS register.
Other gauges have 16 bit FLAGS registers.

For reading the FLAGS register it is sufficient to read the single
register instead of reading RSOC at the next higher address as
well and then ignore the high byte.

This does not change functionality but optimizes i2c and hdq
traffic.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Acked-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
H. Nikolaus Schaller 2016-07-18 18:12:09 +02:00 committed by Sebastian Reichel
parent 47d7d5ed68
commit e4a404a081
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/power/supply/bq27xxx_battery.c
View File

@ -644,8 +644,9 @@ static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
{
int flags;
bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010;
flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
if (flags < 0) {
dev_err(di->dev, "error reading flag register:%d\n", flags);
return flags;
@ -745,7 +746,7 @@ static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
}
if (di->chip == BQ27000 || di->chip == BQ27010) {
flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
if (flags & BQ27000_FLAG_CHGS) {
dev_dbg(di->dev, "negative current!\n");
curr = -curr;