These changes are based on [1] and [2]. The palmas gpadc block has support for monitoring up to 2 ADC channels and issue an interrupt if they reach past a set threshold. This can be configured statically with device tree todayi, but it only gets enabled when reaching sleep mode. Also, it doesn't look like anyone is using it. Instead of this one special case, change the code so userspace can configure the ADC channels to their own needs through the iio events subsystem. Thresholds and events were tested on omap5-uevm board. It should still be possible to wake up from sleep mode on events, but my board don't like sleep. A userspace tool for monitoring events and adjusting thresholds can be found at [3]. [1] https://patchwork.kernel.org/project/linux-iio/patch/20230318163039.56115-1-jic23@xxxxxxxxxx/ [2] https://patchwork.kernel.org/project/linux-iio/patch/20230313205029.1881745-1-risca@xxxxxxxxxxxxxx/ [3] https://github.com/Risca/pyra_vol_mon Patrik Dahlström (3): iio: adc: palmas_gpadc: add support for iio threshold events iio: adc: palmas_gpadc: remove adc_wakeupX_data iio: adc: palmas_gpadc: remove palmas_adc_wakeup_property drivers/iio/adc/palmas_gpadc.c | 527 +++++++++++++++++++++++++++------ include/linux/mfd/palmas.h | 8 - 2 files changed, 434 insertions(+), 101 deletions(-) base-commit: 37fd83916da2e4cae03d350015c82a67b1b334c4 prerequisite-patch-id: 9b1f55610800b91b721d042bf7f33b58179237d1 prerequisite-patch-id: b0418c707db13f514400956596e9ebe91c25bba0 -- 2.25.1
