tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1What: /sys/bus/iio/devices/iio:deviceX/in_voltage-voltage_filter_mode_available
2KernelVersion: 6.2
3Contact: linux-iio@vger.kernel.org
4Description:
5 Reading returns a list with the possible filter modes.
6
7 * "sinc4" - Sinc 4. Excellent noise performance. Long
8 1st conversion time. No natural 50/60Hz rejection.
9
10 * "sinc4+sinc1" - Sinc4 + averaging by 8. Low 1st conversion
11 time.
12
13 * "sinc3" - Sinc3. Moderate 1st conversion time.
14 Good noise performance.
15
16 * "sinc3+rej60" - Sinc3 + 60Hz rejection. At a sampling
17 frequency of 50Hz, achieves simultaneous 50Hz and 60Hz
18 rejection.
19
20 * "sinc3+sinc1" - Sinc3 + averaging by 8. Low 1st conversion
21 time. Best used with a sampling frequency of at least
22 216.19Hz.
23
24 * "sinc3+pf1" - Sinc3 + Post Filter 1. 53dB rejection @
25 50Hz, 58dB rejection @ 60Hz.
26
27 * "sinc3+pf2" - Sinc3 + Post Filter 2. 70dB rejection @
28 50Hz, 70dB rejection @ 60Hz.
29
30 * "sinc3+pf3" - Sinc3 + Post Filter 3. 99dB rejection @
31 50Hz, 103dB rejection @ 60Hz.
32
33 * "sinc3+pf4" - Sinc3 + Post Filter 4. 103dB rejection @
34 50Hz, 109dB rejection @ 60Hz.
35
36What: /sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_filter_mode
37KernelVersion: 6.2
38Contact: linux-iio@vger.kernel.org
39Description:
40 Set the filter mode of the differential channel. When the filter
41 mode changes, the in_voltageY-voltageZ_sampling_frequency and
42 in_voltageY-voltageZ_sampling_frequency_available attributes
43 might also change to accommodate the new filter mode.
44 If the current sampling frequency is out of range for the new
45 filter mode, the sampling frequency will be changed to the
46 closest valid one.