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Subject[PATCH v6 0/3] Add support for PNI RM3100 magnetometer

The next 3 patches do the following:
- The first patch adds PNI Sensor Corporation to the vendor prefix list.
- The second patch adds devicetree binding for RM3100 magnetometer.
- The third patch adds the driver for RM3100 magnetometer.

-- Song Qiang

Changes in v6:
- Add data shift for case BIT(0) | BIT(2) in irq handler.
- Use different memcpy for different cases.
- Move init_completion before devm_request_threaded_irq to prevent
using completion before init.
- Fix some style issues.

Changes in v5:
- Fix a bug about checking if completion is timed out. Used to check if
ret < 0.
- Add INDIO_BUFFER_TRIGGERED to indio_dev->modes.
- Add init mode 'INDIO_DIRECT_MODE'.
- Remove case 0 in trigger handler.
- store scale value directly instead of store cycle_count_index and search for scale value.
- Fix the bug of restarting all channels in rm3100_set_sample_freq.
- Replace 4 in rm3100_buffer_preenable with define 'RM3100_CMM_AXIS_SHIFT'
- Replace timestamp of trigger_hanlder to use iio_pollfunc_store_time.
- Remove rm3100_remove.
- Replace 3 seconds timeout time with double conversions time.
- Read all 3 axis in case BIT(0) | BIT(2) instead of reading each of them independently.
- Remove i2c_check_functionality since regmap_get_i2c_bus already checks it.

Changes in v4:
- Fix a bug about regmap_range configurations.
- Add DRDY trigger support.
- Change DRDY interrupt trigger source from RISING to HIGH.
- Add a thread function to clear the interrupt.
- Change the logic of one-shot read from waiting next continuous ends to
writing to POLL register and waiting conversion ends.
- Add iio_buffer_setup_ops to enable continuous conversion only when
buffer is enabled.
- Add active_scan_mask check in continuous conversions.
- Remove *wait_measurement() in *trigger_handler().

Changes in v3:
- Change PNI to PNI Sensor Corporation in vendor-prefix.txt.
- Sort header files in alpabetical order.
- Add more specific doc for the mutex.
- Fix the bug in the rm3100_set_cycle_count() where we always set the
cycle count value to 100 no matter what val is.
- Change some multiple else if to switch.
- Remove iio_device_release_direct_mode() in the case claim direct mode
- Use the same buffer in rm3100_trigger_handler().
- Add space around some operators.
- Add manually unwind functions in case devm_add_action() fails.
- Move devm_add_action before the devm_iio_device_register().
- Move register defines and rm3100_data struct to *-core.c.
- Change some storage variable type of regmap from int to unsigned int.
- Change 10e4 to 10^4.
- Remove explicit cast of data pointer in rm3100_remove().
- Remve dev in rm3100_data and use regmap_get_device() to obtain device
pointer instead.
- Change register bits alignment in defines.
- Move RM3100_SCAN_BYTES to the top.
- Change Channel endieness from LE to BE.
- Adjust the place of comment about the 3 second wait time.
- Some spell check.

Changes in v2:
- Add scale channel.
- Add EXPORT_SYMBOL_GPL() to export regmap confuguration structures.
- Add sampling frequency available attribute.
- Clean up headers and License declarations.
- Change axis number to 3.
- Remove bus specific part in compatible string.
- Remove le32_to_cpu().
- Check cycle count registers at *_probe().
- Format comments.
- Spell check.
- Change prefix from RM_* to RM3100_*.
- Check all error return paths.
- Add devm_add_action() to avoid race condition when remove.

Song Qiang (3):
dt-bindings: Add PNI to the vendor prefixes
iio: magnetometer: Add DT support for PNI RM3100
iio: magnetometer: Add driver support for PNI RM3100

.../bindings/iio/magnetometer/pni,rm3100.txt | 20 +
.../devicetree/bindings/vendor-prefixes.txt | 1 +
drivers/iio/magnetometer/Kconfig | 29 +
drivers/iio/magnetometer/Makefile | 4 +
drivers/iio/magnetometer/rm3100-core.c | 616 ++++++++++++++++++
drivers/iio/magnetometer/rm3100-i2c.c | 54 ++
drivers/iio/magnetometer/rm3100-spi.c | 64 ++
drivers/iio/magnetometer/rm3100.h | 17 +
9 files changed, 812 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/magnetometer/pni,rm3100.txt
create mode 100644 drivers/iio/magnetometer/rm3100-core.c
create mode 100644 drivers/iio/magnetometer/rm3100-i2c.c
create mode 100644 drivers/iio/magnetometer/rm3100-spi.c
create mode 100644 drivers/iio/magnetometer/rm3100.h


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