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path: root/drivers/hwmon/sht15.c
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Diffstat (limited to 'drivers/hwmon/sht15.c')
-rw-r--r--drivers/hwmon/sht15.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/hwmon/sht15.c b/drivers/hwmon/sht15.c
index 864a371f6eb..a610e7880fb 100644
--- a/drivers/hwmon/sht15.c
+++ b/drivers/hwmon/sht15.c
@@ -36,6 +36,7 @@
#include <linux/err.h>
#include <linux/sht15.h>
#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
#include <asm/atomic.h>
#define SHT15_MEASURE_TEMP 3
@@ -302,13 +303,13 @@ error_ret:
**/
static inline int sht15_calc_temp(struct sht15_data *data)
{
- int d1 = 0;
+ int d1 = temppoints[0].d1;
int i;
- for (i = 1; i < ARRAY_SIZE(temppoints); i++)
+ for (i = ARRAY_SIZE(temppoints) - 1; i > 0; i--)
/* Find pointer to interpolate */
if (data->supply_uV > temppoints[i - 1].vdd) {
- d1 = (data->supply_uV/1000 - temppoints[i - 1].vdd)
+ d1 = (data->supply_uV - temppoints[i - 1].vdd)
* (temppoints[i].d1 - temppoints[i - 1].d1)
/ (temppoints[i].vdd - temppoints[i - 1].vdd)
+ temppoints[i - 1].d1;
@@ -541,7 +542,12 @@ static int __devinit sht15_probe(struct platform_device *pdev)
/* If a regulator is available, query what the supply voltage actually is!*/
data->reg = regulator_get(data->dev, "vcc");
if (!IS_ERR(data->reg)) {
- data->supply_uV = regulator_get_voltage(data->reg);
+ int voltage;
+
+ voltage = regulator_get_voltage(data->reg);
+ if (voltage)
+ data->supply_uV = voltage;
+
regulator_enable(data->reg);
/* setup a notifier block to update this if another device
* causes the voltage to change */