diff options
| author | Alexandru Tachici <alexandru.tachici@analog.com> | 2021-09-06 09:56:30 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-09-14 12:02:12 +0100 |
| commit | 1a913270e57a8e7f1e3789802f1f64e6d0654626 (patch) | |
| tree | 4c2c3ffa17dd5a3f3c5223640d69d7efb04b932f /drivers/iio | |
| parent | e081102f3077aa716974ccebec97003c890d5641 (diff) | |
iio: adc: ad7793: Fix IRQ flag
In Sigma-Delta devices the SDO line is also used as an interrupt.
Leaving IRQ on level instead of falling might trigger a sample read
when the IRQ is enabled, as the SDO line is already low. Not sure
if SDO line will always immediately go high in ad_sd_buffer_postenable
before the IRQ is enabled.
Also the datasheet seem to explicitly say the falling edge of the SDO
should be used as an interrupt:
>From the AD7793 datasheet: " The DOUT/RDY falling edge can be
used as an interrupt to a processor"
Fixes: da4d3d6bb9f6 ("iio: adc: ad-sigma-delta: Allow custom IRQ flags")
Signed-off-by: Alexandru Tachici <alexandru.tachici@analog.com>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210906065630.16325-4-alexandru.tachici@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/adc/ad7793.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c index ef3e2d3ecb0c..0e7ab3fb072a 100644 --- a/drivers/iio/adc/ad7793.c +++ b/drivers/iio/adc/ad7793.c @@ -206,7 +206,7 @@ static const struct ad_sigma_delta_info ad7793_sigma_delta_info = { .has_registers = true, .addr_shift = 3, .read_mask = BIT(6), - .irq_flags = IRQF_TRIGGER_LOW, + .irq_flags = IRQF_TRIGGER_FALLING, }; static const struct ad_sd_calib_data ad7793_calib_arr[6] = { |