From: Lars-Peter Clausen Date: Thu, 31 Jan 2013 14:27:00 +0000 (+0000) Subject: staging:iio:adxrs450: Use usleep_range for the sequential transfer dealy X-Git-Tag: firefly_0821_release~3680^2~1080^2~117^2~14 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=619036e216ce4d34f6d51ad2cf50380a54734c18;p=firefly-linux-kernel-4.4.55.git staging:iio:adxrs450: Use usleep_range for the sequential transfer dealy 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 Signed-off-by: Jonathan Cameron --- diff --git a/drivers/staging/iio/gyro/adxrs450_core.c b/drivers/staging/iio/gyro/adxrs450_core.c index ea10f84cee17..4115fe145137 100644 --- a/drivers/staging/iio/gyro/adxrs450_core.c +++ b/drivers/staging/iio/gyro/adxrs450_core.c @@ -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; }