linux-kernel - [PATCH 0/3] iio: adc: palmas

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Date:   Sun, 19 Mar 2023 23:39:05 +0100
From:   Patrik Dahlström <risca@...akolonin.se>
To:     linux-iio@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, letux-kernel@...nphoenux.org,
        kernel@...a-handheld.com, pgoudagunta@...dia.com,
        hns@...delico.com, jic23@...nel.org, lars@...afoo.de,
        Patrik Dahlström <risca@...akolonin.se>
Subject: [PATCH 0/3] iio: adc: palmas_gpadc: add iio events

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@kernel.org/
[2] https://patchwork.kernel.org/project/linux-iio/patch/20230313205029.1881745-1-risca@dalakolonin.se/
[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