Staging/adrv903x ram capture - #3445
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Add a debugfs interface for quick single-shot RX/ORx data captures from the ADRV903x RAM capture hardware. This provides a simple way to capture raw ADC samples for debugging and signal analysis. Usage: echo "<channel> <length>" > /sys/kernel/debug/iio/iio:deviceX/rx_data_capture cat /sys/kernel/debug/iio/iio:deviceX/rx_data_capture Where channel is 0-7 for RX0-RX7 or 8-9 for ORX0-ORX1, and length is one of the hardware-supported capture sizes (32 to 32768 samples). The memory allocation is done before taking the mutex to allow sleeping allocations (GFP_KERNEL) without holding the device lock. Signed-off-by: Stefan Popa <stefan.popa@analog.com>
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rbolboac
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July 20, 2026 11:13
Add a full IIO device (adrv903x-ramc) for RX/ORx RAM capture with proper I/Q channel support and IIO buffer infrastructure. Features: - 10 I/Q channel pairs: voltage0_i/q through voltage9_q (RX0-7, ORX0-1) - Single-shot capture triggered by buffer enable - Hardware constraint enforcement via available_scan_masks (one channel pair at a time) - Configurable sample count via sample_count sysfs attribute - 28-bit signed I/Q data with proper sign extension and bank demuxing The capture hardware can only sample one RX/ORX channel at a time, which is enforced through available_scan_masks. Users can capture data using iio_readdev or IIO Oscilloscope. Example usage: iio_readdev -u local: -s 1024 adrv903x-ramc voltage0_i voltage0_q Signed-off-by: Stefan Popa <stefan.popa@analog.com>
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