Commit 708fe8c1 authored by Bogdan Davidoaia's avatar Bogdan Davidoaia Committed by Anas Nashif
Browse files

sensor: use integers for simple value calculations 



Use integers for sensor value calculations in which doubles are not
required.

Change-Id: I8662023ca596cb232e31849b0b77ae2bf0372cf0
Signed-off-by: default avatarBogdan Davidoaia <bogdan.m.davidoaia@intel.com>
parent 4946e3e6

drivers/sensor/bmc150_magn/bmc150_magn.c

+4 −2
Original line number Diff line number Diff line
@@ -331,8 +331,10 @@ static int bmc150_magn_sample_fetch(struct device *dev, 


static void bmc150_magn_convert(struct sensor_value *val, int raw_val)

{

	val->type = SENSOR_VALUE_TYPE_DOUBLE;

	val->dval = (double)(raw_val) * (1.0/1600.0);

	/* val = raw_val / 1600 */

	val->type = SENSOR_VALUE_TYPE_INT_PLUS_MICRO;

	val->val1 = raw_val / 1600;

	val->val2 = ((int32_t)raw_val * (1000000 / 1600)) % 1000000;

}



static int bmc150_magn_channel_get(struct device *dev,

drivers/sensor/lps25hb/lps25hb.c

+11 −4
Original line number Diff line number Diff line
@@ -78,15 +78,22 @@ static int lps25hb_sample_fetch(struct device *dev, 
static inline void lps25hb_press_convert(struct sensor_value *val,

					 int32_t raw_val)

{

	val->type = SENSOR_VALUE_TYPE_DOUBLE;

	val->dval = (double)(raw_val) / 40960.0;

	/* val = raw_val / 40960 */

	val->type = SENSOR_VALUE_TYPE_INT_PLUS_MICRO;

	val->val1 = raw_val / 40960;

	val->val2 = ((int32_t)raw_val * 1000000 / 40960) % 1000000;

}



static inline void lps25hb_temp_convert(struct sensor_value *val,

					int16_t raw_val)

{

	val->type = SENSOR_VALUE_TYPE_DOUBLE;

	val->dval = (double)(raw_val) / 480.0 + 42.5;

	int32_t uval;



	/* val = raw_val / 480 + 42.5 */

	val->type = SENSOR_VALUE_TYPE_INT_PLUS_MICRO;

	uval = (int32_t)raw_val * 1000000 / 480 + 42500000;

	val->val1 = (raw_val * 10 / 480 + 425) / 10;

	val->val2 = uval % 1000000;

}



static int lps25hb_channel_get(struct device *dev,

drivers/sensor/lsm6ds0/lsm6ds0.c

+4 −2
Original line number Diff line number Diff line
@@ -358,8 +358,10 @@ static int lsm6ds0_gyro_channel_get(enum sensor_channel chan, 
static void lsm6ds0_gyro_channel_get_temp(struct sensor_value *val,

					  struct lsm6ds0_data *data)

{

	val->type = SENSOR_VALUE_TYPE_DOUBLE;

	val->dval = (double)(data->temp_sample) / 16.0 + 25.0;

	/* val = temp_sample / 16 + 25 */

	val->type = SENSOR_VALUE_TYPE_INT_PLUS_MICRO;

	val->val1 = data->temp_sample / 16 + 25;

	val->val2 = (data->temp_sample % 16) * (1000000 / 16);

}

#endif

drivers/sensor/lsm9ds0_mfd/lsm9ds0_mfd.c

+3 −2
Original line number Diff line number Diff line
@@ -574,8 +574,9 @@ static int lsm9ds0_mfd_channel_get(struct device *dev, 
#endif

#if !defined(LSM9DS0_MFD_TEMP_DISABLED)

	case SENSOR_CHAN_TEMP:

		val->type = SENSOR_VALUE_TYPE_DOUBLE;

		val->dval = data->sample_temp;

		val->type = SENSOR_VALUE_TYPE_INT_PLUS_MICRO;

		val->val1 = data->sample_temp;

		val->val2 = 0;

		return 0;

#endif

	default:

drivers/sensor/max44009/max44009.c

+3 −2
Original line number Diff line number Diff line
@@ -164,9 +164,10 @@ static int max44009_channel_get(struct device *dev, enum sensor_channel chan, 
	       ((uval & MAX44009_MANTISSA_HIGH_NIBBLE_MASK) >> 4);

	uval = uval << (drv_data->sample >> MAX44009_SAMPLE_EXPONENT_SHIFT);



	val->type = SENSOR_VALUE_TYPE_DOUBLE;

	/* lux is the integer of sample output multiplied by 0.045. */

	val->dval = ((double)uval) * 0.045;

	val->type = SENSOR_VALUE_TYPE_INT_PLUS_MICRO;

	val->val1 = (uval * 45) / 1000;

	val->val2 = ((uval * 45) % 1000) * 1000;



	return 0;

}

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