diff options
Diffstat (limited to 'drivers/hwmon/sht15.c')
| -rw-r--r-- | drivers/hwmon/sht15.c | 14 |
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 */ |