The MLX90614_CONST_EMISSIVITY_RESOLUTION can be calculated from
MLX90614_CONST_RAW_EMISSIVITY_MAX, perform the calculation inline
and drio the MLX90614_CONST_EMISSIVITY_RESOLUTION.
Signed-off-by: Marek Vasut <marex@xxxxxxx>
---
Cc: Crt Mori <cmo@xxxxxxxxxxx>
Cc: Jonathan Cameron <jic23@xxxxxxxxxx>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>
Cc: Lars-Peter Clausen <lars@xxxxxxxxxx>
Cc: Marek Vasut <marex@xxxxxxx>
Cc: Peter Meerwald <pmeerw@xxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-iio@xxxxxxxxxxxxxxx
---
V3: New patch
---
drivers/iio/temperature/mlx90614.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/temperature/mlx90614.c b/drivers/iio/temperature/mlx90614.c
index b0f69a7b05abc..ecd27fe0c8666 100644
--- a/drivers/iio/temperature/mlx90614.c
+++ b/drivers/iio/temperature/mlx90614.c
@@ -63,7 +63,6 @@
#define MLX90614_CONST_OFFSET_REM 500000 /* remainder of offset (273.15*50) */
#define MLX90614_CONST_SCALE 20 /* Scale in milliKelvin (0.02 * 1000) */
#define MLX90614_CONST_RAW_EMISSIVITY_MAX 65535 /* max value for emissivity */
-#define MLX90614_CONST_EMISSIVITY_RESOLUTION 15259 /* 1/65535 ~ 0.000015259 */
#define MLX90614_CONST_FIR 0x7 /* Fixed value for FIR part of low pass filter */
struct mlx90614_data {
@@ -283,7 +282,8 @@ static int mlx90614_read_raw(struct iio_dev *indio_dev,
*val2 = 0;
} else {
*val = 0;
- *val2 = ret * MLX90614_CONST_EMISSIVITY_RESOLUTION;
+ *val2 = ret * NSEC_PER_SEC /
+ MLX90614_CONST_RAW_EMISSIVITY_MAX;
}
return IIO_VAL_INT_PLUS_NANO;
case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: /* IIR setting with
@@ -321,7 +321,7 @@ static int mlx90614_write_raw(struct iio_dev *indio_dev,
if (val < 0 || val2 < 0 || val > 1 || (val == 1 && val2 != 0))
return -EINVAL;
val = val * MLX90614_CONST_RAW_EMISSIVITY_MAX +
- val2 / MLX90614_CONST_EMISSIVITY_RESOLUTION;
+ val2 * MLX90614_CONST_RAW_EMISSIVITY_MAX / NSEC_PER_SEC;
ret = mlx90614_power_get(data, false);
if (ret < 0)
--
2.39.2
