Use DIV_ROUND_CLOSEST() when dealing with the calibration values to make the
calculations less error prone.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
---
drivers/hwmon/ina2xx.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/hwmon/ina2xx.c b/drivers/hwmon/ina2xx.c
index ae110c5..611ec4e 100644
--- a/drivers/hwmon/ina2xx.c
+++ b/drivers/hwmon/ina2xx.c
@@ -186,8 +186,11 @@ static void ina226_set_update_interval(struct ina2xx_data *data)
static int ina2xx_calibrate(struct ina2xx_data *data)
{
- return i2c_smbus_write_word_swapped(data->client, INA2XX_CALIBRATION,
- data->config->calibration_factor / data->rshunt);
+ u16 val = DIV_ROUND_CLOSEST(data->config->calibration_factor,
+ data->rshunt);
+
+ return i2c_smbus_write_word_swapped(data->client,
+ INA2XX_CALIBRATION, val);
}
/*
@@ -307,7 +310,8 @@ static int ina2xx_get_value(struct ina2xx_data *data, u8 reg)
val = (s16)data->regs[reg];
break;
case INA2XX_CALIBRATION:
- val = data->config->calibration_factor / data->regs[reg];
+ val = DIV_ROUND_CLOSEST(data->config->calibration_factor,
+ data->regs[reg]);
break;
default:
/* programmer goofed */
--
2.1.3
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