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authorGrazvydas Ignotas <notasas@gmail.com>2011-02-15 23:27:35 +0200
committerLars-Peter Clausen <lars@metafoo.de>2011-02-22 11:02:48 +0100
commit9e912f452931b3da9d13d716a381ba0d5fb74ced (patch)
treef3fa488fc6e448bbe492404897227db460089c5b /drivers/power
parent2ec523a8238a117b082ca6b0cef3b9ae812364f9 (diff)
bq27x00: Use single i2c_transfer call for property read
Doing this by using 2 calls sometimes results in unexpected values being returned on OMAP3 i2c controller. Signed-off-by: Grazvydas Ignotas <notasas@gmail.com> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/bq27x00_battery.c27
1 files changed, 11 insertions, 16 deletions
diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index 740a0ac29dd1..59e68dbd028b 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -565,31 +565,26 @@ static DEFINE_MUTEX(battery_mutex);
static int bq27x00_read_i2c(struct bq27x00_device_info *di, u8 reg, bool single)
{
struct i2c_client *client = to_i2c_client(di->dev);
- struct i2c_msg msg;
+ struct i2c_msg msg[2];
unsigned char data[2];
int ret;
if (!client->adapter)
return -ENODEV;
- msg.addr = client->addr;
- msg.flags = 0;
- msg.len = 1;
- msg.buf = data;
-
- data[0] = reg;
- ret = i2c_transfer(client->adapter, &msg, 1);
-
- if (ret < 0)
- return ret;
-
+ msg[0].addr = client->addr;
+ msg[0].flags = 0;
+ msg[0].buf = &reg;
+ msg[0].len = sizeof(reg);
+ msg[1].addr = client->addr;
+ msg[1].flags = I2C_M_RD;
+ msg[1].buf = data;
if (single)
- msg.len = 1;
+ msg[1].len = 1;
else
- msg.len = 2;
+ msg[1].len = 2;
- msg.flags = I2C_M_RD;
- ret = i2c_transfer(client->adapter, &msg, 1);
+ ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
if (ret < 0)
return ret;