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| author | Cosmin Tanislav <cosmin.tanislav@analog.com> | 2022-10-21 13:41:15 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-11-23 19:44:01 +0000 |
| commit | 62094060cf3acaf52e277457d807ea753269b89e (patch) | |
| tree | fd73bd23f81bcbfeea32be2ae5540372ed62e200 /Documentation/ABI/testing | |
| parent | 36a4df5003c91663bd2d68a3cf452c0495ce583c (diff) | |
| download | linux-62094060cf3acaf52e277457d807ea753269b89e.tar.bz2 | |
iio: adc: ad4130: add AD4130 driver
AD4130-8 is an ultra-low power, high precision, measurement solution for
low bandwidth battery operated applications.
The fully integrated AFE (Analog Front-End) includes a multiplexer for up
to 16 single-ended or 8 differential inputs, PGA (Programmable Gain
Amplifier), 24-bit Sigma-Delta ADC, on-chip reference and oscillator,
selectable filter options, smart sequencer, sensor biasing and excitation
options, diagnostics, and a FIFO buffer.
Signed-off-by: Cosmin Tanislav <cosmin.tanislav@analog.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20221021104115.1812486-3-demonsingur@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'Documentation/ABI/testing')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio-adc-ad4130 | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-adc-ad4130 b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad4130 new file mode 100644 index 000000000000..d9555751d21c --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad4130 @@ -0,0 +1,36 @@ +What: /sys/bus/iio/devices/iio:deviceX/in_voltage-voltage_filter_mode_available +KernelVersion: 6.2 +Contact: linux-iio@vger.kernel.org +Description: + Reading returns a list with the possible filter modes. + "sinc4" - Sinc 4. Excellent noise performance. Long 1st + conversion time. No natural 50/60Hz rejection. + "sinc4+sinc1" - Sinc4 + averaging by 8. Low 1st conversion time. + "sinc3" - Sinc3. Moderate 1st conversion time. Good noise + performance. + "sinc3+rej60" - Sinc3 + 60Hz rejection. At a sampling frequency + of 50Hz, achieves simultaneous 50Hz and 60Hz + rejection. + "sinc3+sinc1" - Sinc3 + averaging by 8. Low 1st conversion time. + Best used with a sampling frequency of at least + 216.19Hz. + "sinc3+pf1" - Sinc3 + Post Filter 1. + 53dB rejection @ 50Hz, 58dB rejection @ 60Hz. + "sinc3+pf2" - Sinc3 + Post Filter 2. + 70dB rejection @ 50Hz, 70dB rejection @ 60Hz. + "sinc3+pf3" - Sinc3 + Post Filter 3. + 99dB rejection @ 50Hz, 103dB rejection @ 60Hz. + "sinc3+pf4" - Sinc3 + Post Filter 4. + 103dB rejection @ 50Hz, 109dB rejection @ 60Hz. + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_filter_mode +KernelVersion: 6.2 +Contact: linux-iio@vger.kernel.org +Description: + Set the filter mode of the differential channel. When the filter + mode changes, the in_voltageY-voltageZ_sampling_frequency and + in_voltageY-voltageZ_sampling_frequency_available attributes + might also change to accommodate the new filter mode. + If the current sampling frequency is out of range for the new + filter mode, the sampling frequency will be changed to the + closest valid one. |