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iio: imu: mpu6050: fix INV_MPU6050_REG_UP_TIME delay 

replace msleep(INV_MPU6050_REG_UP_TIME) with usleep_range calls
due to fact the wait time is under 20 milliseconds.

Signed-off-by: Matt Ranostay <matt.ranostay@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Matt Ranostay 2016-02-22 13:39:08 -08:00 committed by Jonathan Cameron
parent 115f0341bc
commit 8f356be3fe
3 changed files with 10 additions and 3 deletions
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3
drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
View File

@ -151,7 +151,8 @@ int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on)
return result; return result;
if (power_on) if (power_on)
msleep(INV_MPU6050_REG_UP_TIME); usleep_range(INV_MPU6050_REG_UP_TIME_MIN,
INV_MPU6050_REG_UP_TIME_MAX);
return 0; return 0;
} }

3
drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
View File

@ -68,7 +68,8 @@ static int inv_mpu6050_select_bypass(struct i2c_adapter *adap, void *mux_priv,
if (ret) if (ret)
goto write_error; goto write_error;
msleep(INV_MPU6050_REG_UP_TIME); usleep_range(INV_MPU6050_REG_UP_TIME_MIN,
INV_MPU6050_REG_UP_TIME_MAX);
} }
if (!ret) { if (!ret) {
st->powerup_count++; st->powerup_count++;

7
drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
View File

@ -172,10 +172,15 @@ struct inv_mpu6050_state {
#define INV_MPU6050_BYTES_PER_3AXIS_SENSOR 6 #define INV_MPU6050_BYTES_PER_3AXIS_SENSOR 6
#define INV_MPU6050_FIFO_COUNT_BYTE 2 #define INV_MPU6050_FIFO_COUNT_BYTE 2
#define INV_MPU6050_FIFO_THRESHOLD 500 #define INV_MPU6050_FIFO_THRESHOLD 500
/* delay time in milliseconds */
#define INV_MPU6050_POWER_UP_TIME 100 #define INV_MPU6050_POWER_UP_TIME 100
#define INV_MPU6050_TEMP_UP_TIME 100 #define INV_MPU6050_TEMP_UP_TIME 100
#define INV_MPU6050_SENSOR_UP_TIME 30 #define INV_MPU6050_SENSOR_UP_TIME 30
#define INV_MPU6050_REG_UP_TIME 5
/* delay time in microseconds */
#define INV_MPU6050_REG_UP_TIME_MIN 5000
#define INV_MPU6050_REG_UP_TIME_MAX 10000
#define INV_MPU6050_TEMP_OFFSET 12421 #define INV_MPU6050_TEMP_OFFSET 12421
#define INV_MPU6050_TEMP_SCALE 2941 #define INV_MPU6050_TEMP_SCALE 2941