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drivers: sensor: bq274xx: remove float use

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Remove float usage in calculation of
SENSOR_CHAN_GAUGE_TEMP

Signed-off-by: Nick Ward <nix.ward@gmail.com>
This commit is contained in:
Nick Ward 2023-12-29 22:01:32 +11:00 • committed by Maureen Helm
commit e9b56bd1ec
1 changed files with 10 additions and 5 deletions
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15
drivers/sensor/bq274xx/bq274xx.c
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@ -62,6 +62,9 @@ LOG_MODULE_REGISTER(bq274xx, CONFIG_SENSOR_LOG_LEVEL);
#define BQ274XX_SUBCLASS_82 82
#define BQ274XX_SUBCLASS_105 105
/* For temperature conversion */
#define KELVIN_OFFSET 273.15
static const struct bq274xx_regs bq27421_regs = {
.dm_design_capacity = 10,
.dm_design_energy = 12,
@ -485,7 +488,7 @@ static int bq274xx_channel_get(const struct device *dev, enum sensor_channel cha
struct sensor_value *val)
{
struct bq274xx_data *data = dev->data;
float int_temp;
int32_t int_temp;
switch (chan) {
case SENSOR_CHAN_GAUGE_VOLTAGE:
@ -509,10 +512,12 @@ static int bq274xx_channel_get(const struct device *dev, enum sensor_channel cha
break;
case SENSOR_CHAN_GAUGE_TEMP:
int_temp = (data->internal_temperature * 0.1f);
int_temp = int_temp - 273.15f;
val->val1 = (int32_t)int_temp;
val->val2 = (int_temp - (int32_t)int_temp) * 1000000;
/* Convert units from 0.1K to 0.01K */
int_temp = data->internal_temperature * 10;
/* Convert to 0.01C */
int_temp -= (int32_t)(100.0 * KELVIN_OFFSET);
val->val1 = int_temp / 100;
val->val2 = (int_temp % 100) * 10000;
break;
case SENSOR_CHAN_GAUGE_STATE_OF_CHARGE: