[PATCH v4 0/6] io: accel: mma8452: Allow open drain interrupt pin configuration

Extend the mma8452 driver with support for configuration of the
interrupt line in open-drain mode, which is needed for hardware designs
where the interrupt line is shared with other chips.

Adding drive-open-drain property to mma8452 device-tree node for such
designs to enable switching pin configuration to open-drain mode.

Signed-off-by: Esben Haabendal <[email protected]>
---
Changes in v4:
- Fixed interrupt handler to check runtime PM status before trying to
  access the chip.
- Split open-drain support and interrupt sharing into separate patches.
- Added new patch to reuse existing struct device * through mma8452_probe()
  function.
- Print warning message when irq type is not set by firmware.
- Link to v3: https://patch.msgid.link/[email protected]

Changes in v3:
- Reordered patches, swapping #2 and #3.
- Always add IRQF_SHARED flag.
- New patch to change it so IQRF_TRIGGER_LOW flag is only added when no
  trigger type is set by firmware.
- Link to v2: https://patch.msgid.link/[email protected]

Changes in v2:
- Commit message of patch 2 updated.
- Operator precedence bug fixed in flags argument to
  request_threaded_irq().
- Always check return value of mma8452_set_interrupt_pin_mode(), and just
  check for non-zero value.
- Added new patch with optimization of struct mma8452_data ordering.
- Link to v1: https://patch.msgid.link/[email protected]

To: Jonathan Cameron <[email protected]>
To: Lars-Peter Clausen <[email protected]>
To: Rob Herring <[email protected]>
To: Krzysztof Kozlowski <[email protected]>
To: Conor Dooley <[email protected]>
To: Martin Kepplinger <[email protected]>
To: Sean Nyekjaer <[email protected]>
To: David Lechner <[email protected]>
To: Nuno Sá <[email protected]>
To: Andy Shevchenko <[email protected]>
To: Martin Kepplinger <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]

---
Esben Haabendal (6):
      dt-bindings: iio: accel: mma8452: Add drive-open-drain
      iio: accel: mma8452: Optimize struct mm8452_data member orders
      iio: accel: mma8452: Only apply trigger type when not set by firmware
      iio: accel: mma8452: Support interrupt sharing
      iio: accel: mma8452: Allow open drain interrupt pin configuration
      iio: accel: mma8452: Reuse existing dev pointer in mma8452_probe()

 .../devicetree/bindings/iio/accel/fsl,mma8452.yaml |  6 ++
 drivers/iio/accel/mma8452.c                        | 90 ++++++++++++++++------
 2 files changed, 73 insertions(+), 23 deletions(-)
---
base-commit: db2ddb87143519e20a95aa36c60b36107b736a58
change-id: 20250401-mma8452-open-drain-81577c41375c

Best regards,
--  
Esben Haabendal <[email protected]>