diff options
| author | Stepan Ionichev <sozdayvek@gmail.com> | 2026-05-11 07:55:44 +0500 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2026-05-31 10:59:38 +0100 |
| commit | 7e6a73eda92ac7aeda7587c65a1acd32b31a5c3b (patch) | |
| tree | 957b76ef561520480eed5c16804031943e5037ef /drivers/iio/adc | |
| parent | 01437ab5111f57005be54005f5b575dc06cb682e (diff) | |
| download | linux-next-7e6a73eda92ac7aeda7587c65a1acd32b31a5c3b.tar.gz linux-next-7e6a73eda92ac7aeda7587c65a1acd32b31a5c3b.zip | |
iio: adc: ad7192: replace usleep_range() with fsleep()
The AD7192 datasheet (Rev. A, page 34, RESET section) says:
"When a reset is initiated, the user must allow a period of
500 us before accessing any of the on-chip registers."
Use fsleep(500) instead of usleep_range(500, 1000).
Signed-off-by: Stepan Ionichev <sozdayvek@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/adc')
| -rw-r--r-- | drivers/iio/adc/ad7192.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c index 8b1664f6b102..ba27614c89b4 100644 --- a/drivers/iio/adc/ad7192.c +++ b/drivers/iio/adc/ad7192.c @@ -576,7 +576,12 @@ static int ad7192_setup(struct iio_dev *indio_dev, struct device *dev) ret = ad_sd_reset(&st->sd); if (ret < 0) return ret; - usleep_range(500, 1000); /* Wait for at least 500us */ + + /* + * Per AD7192 datasheet (Rev. A, page 34, RESET section), allow + * 500 us after a reset before accessing on-chip registers. + */ + fsleep(500); /* write/read test for device presence */ ret = ad_sd_read_reg(&st->sd, AD7192_REG_ID, 1, &id); |