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path: root/drivers/iio/humidity/dht11.c
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Diffstat (limited to 'drivers/iio/humidity/dht11.c')
-rw-r--r--drivers/iio/humidity/dht11.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/iio/humidity/dht11.c b/drivers/iio/humidity/dht11.c
index 9c47bc98f3ac..2a22ad920333 100644
--- a/drivers/iio/humidity/dht11.c
+++ b/drivers/iio/humidity/dht11.c
@@ -71,7 +71,8 @@
* a) select an implementation using busy loop polling on those systems
* b) use the checksum to do some probabilistic decoding
*/
-#define DHT11_START_TRANSMISSION 18 /* ms */
+#define DHT11_START_TRANSMISSION_MIN 18000 /* us */
+#define DHT11_START_TRANSMISSION_MAX 20000 /* us */
#define DHT11_MIN_TIMERES 34000 /* ns */
#define DHT11_THRESHOLD 49000 /* ns */
#define DHT11_AMBIG_LOW 23000 /* ns */
@@ -228,7 +229,8 @@ static int dht11_read_raw(struct iio_dev *iio_dev,
ret = gpio_direction_output(dht11->gpio, 0);
if (ret)
goto err;
- msleep(DHT11_START_TRANSMISSION);
+ usleep_range(DHT11_START_TRANSMISSION_MIN,
+ DHT11_START_TRANSMISSION_MAX);
ret = gpio_direction_input(dht11->gpio);
if (ret)
goto err;
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