staging:iio:adxrs450: Use usleep_range for the sequential transfer dealy
authorLars-Peter Clausen <lars@metafoo.de>
Thu, 31 Jan 2013 14:27:00 +0000 (14:27 +0000)
committerJonathan Cameron <jic23@kernel.org>
Sat, 2 Feb 2013 09:22:48 +0000 (09:22 +0000)
The adxrs450 requires a delay of at least 0.1 ms between register writes.  Using
msleep() for such small delays is not recommended. So use usleep_range instead.

Fixes the following checkpatch warning:
WARNING: msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.txt
+ msleep(1);

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
drivers/staging/iio/gyro/adxrs450_core.c

index ea10f84cee17a7827405240a06d5c14fa36978d2..4115fe1451372558dd8d5dd38d15527a7acd7380 100644 (file)
@@ -101,7 +101,7 @@ static int adxrs450_spi_write_reg_16(struct iio_dev *indio_dev,
        if (ret)
                dev_err(&st->us->dev, "problem while writing 16 bit register 0x%02x\n",
                        reg_address);
-       msleep(1); /* enforce sequential transfer delay 0.1ms */
+       usleep_range(100, 1000); /* enforce sequential transfer delay 0.1ms */
        mutex_unlock(&st->buf_lock);
        return ret;
 }