Datasheet specifies typical and maximum execution times for which CMD register is occupied after previous command execution. We took these values as minimum and maximum time for usleep_range() call before making a new command execution. To be sure, that the CMD register is no longer occupied we need to wait *at least* the maximum time specified by datasheet. Signed-off-by: Marcin Niestroj <m.niestroj@xxxxxxxxxxxxxxxx> --- Patch introduced in v2 drivers/iio/imu/bmi160/bmi160_core.c | 25 ++++++------------------- 1 file changed, 6 insertions(+), 19 deletions(-) diff --git a/drivers/iio/imu/bmi160/bmi160_core.c b/drivers/iio/imu/bmi160/bmi160_core.c index 095533c..88bcf3f 100644 --- a/drivers/iio/imu/bmi160/bmi160_core.c +++ b/drivers/iio/imu/bmi160/bmi160_core.c @@ -67,10 +67,8 @@ #define BMI160_REG_DUMMY 0x7F -#define BMI160_ACCEL_PMU_MIN_USLEEP 3200 -#define BMI160_ACCEL_PMU_MAX_USLEEP 3800 -#define BMI160_GYRO_PMU_MIN_USLEEP 55000 -#define BMI160_GYRO_PMU_MAX_USLEEP 80000 +#define BMI160_ACCEL_PMU_MIN_USLEEP 3800 +#define BMI160_GYRO_PMU_MIN_USLEEP 80000 #define BMI160_SOFTRESET_USLEEP 1000 #define BMI160_CHANNEL(_type, _axis, _index) { \ @@ -153,20 +151,9 @@ static struct bmi160_regs bmi160_regs[] = { }, }; -struct bmi160_pmu_time { - unsigned long min; - unsigned long max; -}; - -static struct bmi160_pmu_time bmi160_pmu_time[] = { - [BMI160_ACCEL] = { - .min = BMI160_ACCEL_PMU_MIN_USLEEP, - .max = BMI160_ACCEL_PMU_MAX_USLEEP - }, - [BMI160_GYRO] = { - .min = BMI160_GYRO_PMU_MIN_USLEEP, - .max = BMI160_GYRO_PMU_MIN_USLEEP, - }, +static unsigned long bmi160_pmu_time[] = { + [BMI160_ACCEL] = BMI160_ACCEL_PMU_MIN_USLEEP, + [BMI160_GYRO] = BMI160_GYRO_PMU_MIN_USLEEP, }; struct bmi160_scale { @@ -293,7 +280,7 @@ int bmi160_set_mode(struct bmi160_data *data, enum bmi160_sensor_type t, if (ret < 0) return ret; - usleep_range(bmi160_pmu_time[t].min, bmi160_pmu_time[t].max); + usleep_range(bmi160_pmu_time[t], bmi160_pmu_time[t] + 1000); return 0; } -- 2.10.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html