iio: adc: versal-sysmon: add oversampling support

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Add support for reading and writing the oversampling ratio through
the IIO oversampling_ratio attribute. The hardware supports averaging
2, 4, 8, or 16 samples, plus a ratio of 1 (no averaging).

Temperature and supply channels share oversampling configuration at
the type level (all temperature channels share one ratio, all supply
channels share another), exposed through info_mask_shared_by_type.

The hardware encoding uses sample_count / 2 in a 4-bit field within
the CONFIG register. Per-channel averaging enable registers must also
be updated to activate or deactivate averaging.

Signed-off-by: Salih Erim <salih.erim@amd.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

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Salih Erim 2026-06-24 15:37:22 +01:00 • committed by Jonathan Cameron

parent c7f7eb1063

commit cbfd04ca56

2 changed files with 174 additions and 2 deletions

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159

drivers/iio/adc/versal-sysmon-core.c

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17

drivers/iio/adc/versal-sysmon.h

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