diff --git a/[refs] b/[refs]
index 50b1f81fa2e2..7803db6957c1 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e4ac7283639bb8da69af6ff5c00e2340348a339e
+refs/heads/master: 3e4334f2d6f3025e396a710f758fd1663c104976
diff --git a/trunk/drivers/staging/iio/adc/ad7793.c b/trunk/drivers/staging/iio/adc/ad7793.c
index bd1358e51ec0..55d302dc504c 100644
--- a/trunk/drivers/staging/iio/adc/ad7793.c
+++ b/trunk/drivers/staging/iio/adc/ad7793.c
@@ -122,7 +122,7 @@ static int ad7793_setup(struct iio_dev *indio_dev,
 	ret = spi_write(st->sd.spi, (u8 *)&ret, sizeof(ret));
 	if (ret < 0)
 		goto out;
-	msleep(1); /* Wait for at least 500us */
+	usleep_range(500, 2000); /* Wait for at least 500us */
 
 	/* write/read test for device presence */
 	ret = ad_sd_read_reg(&st->sd, AD7793_REG_ID, 1, &id);