diff options
| -rw-r--r-- | drivers/power/supply/bq27xxx_battery.c | 2 | ||||
| -rw-r--r-- | drivers/power/supply/bq27xxx_battery_i2c.c | 13 |
2 files changed, 13 insertions, 2 deletions
diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c index 2f31d750a4c1..93dcebbe1141 100644 --- a/drivers/power/supply/bq27xxx_battery.c +++ b/drivers/power/supply/bq27xxx_battery.c @@ -2131,7 +2131,7 @@ static int bq27xxx_battery_get_property(struct power_supply *psy, mutex_unlock(&di->lock); if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0) - return -ENODEV; + return di->cache.flags; switch (psp) { case POWER_SUPPLY_PROP_STATUS: diff --git a/drivers/power/supply/bq27xxx_battery_i2c.c b/drivers/power/supply/bq27xxx_battery_i2c.c index ba0d22d90429..868e95f0887e 100644 --- a/drivers/power/supply/bq27xxx_battery_i2c.c +++ b/drivers/power/supply/bq27xxx_battery_i2c.c @@ -6,6 +6,7 @@ * Andrew F. Davis <afd@ti.com> */ +#include <linux/delay.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/module.h> @@ -31,6 +32,7 @@ static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg, struct i2c_msg msg[2]; u8 data[2]; int ret; + int retry = 0; if (!client->adapter) return -ENODEV; @@ -47,7 +49,16 @@ static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg, else msg[1].len = 2; - ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); + do { + ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); + if (ret == -EBUSY && ++retry < 3) { + /* sleep 10 milliseconds when busy */ + usleep_range(10000, 11000); + continue; + } + break; + } while (1); + if (ret < 0) return ret; |