Hello, The ad738x family includes a built-in alert mechanism for early detection of out-of-bounds conversion results. This series introduces this functionality to the ad7380 family. This is the first non RFC version of the series (RFC available at [1] and [2]). Given the fact that the main use case is to hardwire the interrupt line and according to discussions in V2 about interrupts, I think the best is to not generate events, at least while we don't have a reasonable way to correctly and efficiently handle interrupts. Events attributes are still populated to allow user to set a threshold and enable alert detection, so alert pin can be hardwired. Userspace event can still be added later if needed. [1]: https://lore.kernel.org/r/20241029-ad7380-add-aleyyrt-support-v1-1-d0359401b788@xxxxxxxxxxxx [2]: https://lore.kernel.org/r/20241224-ad7380-add-alert-support-v2-0-7c89b2bf7cb3@xxxxxxxxxxxx Signed-off-by: Julien Stephan <jstephan@xxxxxxxxxxxx> --- Changes in v4: - docs: fix some nitpicks from David Lechner - driver: fix some nitpicks from David Lechner and use helper functions to get/set the thresholds - driver: fix reading the low threshold value - add Reviewed-by tag from David Lechner - Link to v3: https://lore.kernel.org/r/20250107-ad7380-add-alert-support-v3-0-bce10afd656b@xxxxxxxxxxxx Changes in v3: - split regmap cache commit in two - remove interrupt handling completely, updating commit messages, driver, and doc - fix minor comments from v2 review - improve commit message for iio_device_claim_direct_scoped removal - Link to v2: https://lore.kernel.org/r/20241224-ad7380-add-alert-support-v2-0-7c89b2bf7cb3@xxxxxxxxxxxx Changes in v2: - fix read/write high/low thresholds - add reset_timeout mechanism for buffered reads - implement regcache - add cleanup patch to remove iio_device_claim_direct_scoped calls - add alert section in the Documentation page - Link to v1: https://lore.kernel.org/r/20241029-ad7380-add-aleyyrt-support-v1-1-d0359401b788@xxxxxxxxxxxx --- Julien Stephan (5): iio: adc: ad7380: do not use iio_device_claim_direct_scoped anymore iio: adc: ad7380: enable regmap cache iio: adc: ad7380: do not store osr in private data structure iio: adc: ad7380: add alert support docs: iio: ad7380: add alert support Documentation/iio/ad7380.rst | 33 +++- drivers/iio/adc/ad7380.c | 402 +++++++++++++++++++++++++++++++++++++------ 2 files changed, 378 insertions(+), 57 deletions(-) --- base-commit: 5ab39233382c621d3271cc274d1534e1b687f4d3 change-id: 20241029-ad7380-add-alert-support-4d0dd6cea8cd Best regards, -- Julien Stephan <jstephan@xxxxxxxxxxxx>
