This patchset adds BMP380 variant to the already existing drivers for the Bosch BMP180/280 pressure sensors. Patch 1 reorder local variables declarations following reverse xmas tree conventions, as suggested by Andy Shevchenko <andy.shevchenko@xxxxxxxxx>. Patch 2 migrates existing code to use FIELD_GET/FIELD_PREP and GENMASK utilities. Patch 3 is a minor refactor of the function that loads bmp280 calibration params, taking advantage of the data contiguity in memory. Patch 4 is a minor refactor simplifying driver initialization logic to facilitate the integration of the new sensor variant extending the information stored in the "chip_info" struct. Patch 5 fixes DMA unsafe regmap_bulk_* calls reported by Jonathan Cameron <jic23@xxxxxxxxxx>. Patch 6 is a minor refactor reordering device match tables declarations in forward order as suggested by Andy Shevchenko <andy.shevchenko@xxxxxxxxx>. Patch 7 adds the basic logic to initialize and read measurements from the sensor. Patch 8 adds references and sensor id to the devicetree bindings docs. Patch 9 adds advanced configurable features such as sampling frequency and IIR filter through the IIO sysfs ABI. Changes in v6: - Introduced patch 1 reordering local variables declarations. - Patch 2 is separated form v5 patch 1, separating initialization refactor from migration to FIELD_GET, FIELD_PREP and GENMASK. - Patch 3 backports a refactor made to bmp280 calibration load on v5 patch 2. - Introduced patch 6 reordering i2c device match tables declarations. - Revised patch 7 and 9 and smoothed transition to patch 9 moving some code on v5 patch 5 to patch 7 (BMP380 basic enablement). - Cleaned error handling of regmap calls thorough patches. - Changed formula used to handle IIR filter on patch 9 following feedback made by Andy Shevchenko <andy.shevchenko@xxxxxxxxx>. - Made union with data buffers on patch 5 anonymous (suggested by Andy Shevchenko <andy.shevchenko@xxxxxxxxx>) - Improved handling of be16 and le16 data on patch 5 integrating changes suggested by Jonathan Cameron <jic23@xxxxxxxxxx>. Changes in v5: - Moved dt bindings patch (previously patch 2/5) to 4/5 to preserve tree coherence as suggested by Jonathan Cameron <jic23@xxxxxxxxxx> - Patch 1: Simplified initial oversampling values assignation. - Patch 1: Updated codepaths for bmp180 and bmp280 to use FIELD_GET and FIELD_GET helpers. Migrated compatible masks to use GENMASK. - Patch 2: Store DMA-safe buffers on the device data struct instead of using dynamic allocations for calibration buffers. Thanks Jonathan Cameron <jic23@xxxxxxxxxx>. - Patch 3: Fixed small typos - Patch 3: Fixed incompatible division on 32-bit machines reported by Andy Shevchenko <andy.shevchenko@xxxxxxxxx> and kernel test robot <lkp@xxxxxxxxx>. - Patch 3: Fixed inconsistent use of "x" and "X" declaring constants. - Patch 5: Dropped incorrect reported-by tag on changelog message. - Patch 5: Fixed typos on various comments. Changes in v4: - Patch 4 and 2: Merged v3 patch 2 (Kconfig refs update) into this patch. - Patch 3: Added patch fixing unsafe DMA regmap_bulk_* calls reported by Jonathan Cameron <jic23@xxxxxxxxxx>. - Patch 4: Fixed DMA unsafe buffers used on regmap_bulk_* calls reported by Jonathan Cameron <jic23@xxxxxxxxxx>. Changes in v3: - Patch 2: Fixed incorrect abbreviation. - Patch 3: use dev_err_probe helper to handle error initializing sensor. - Patch 4: Fixed kernel test robot warning provoked by missing include. - Patch 4: Fixed bug reported by Dan Carpenter <dan.carpenter@xxxxxxxxxx>. - Patch 5: Fixed formatting and typos on multiple comments. - Patch 5: Fixed missing boolean initialization reported by Andy Shevchenko <andy.shevchenko@xxxxxxxxx>. - Patch 5: Replaced duplicated comments with a single comment containing a brief explantation in a shared location. - Patch 5: Dropped incorrect use of unlikely macro. Changes in v2: - Added patch 2 updating Kconfig with references to new sensor. - Patch 3 adds changes proposed by Jonathan Cameron <jic23@xxxxxxxxxx> to declutter and unify configuration logic for the different sensors extending "chip_info" struct with default configuration parameters. - Patch 4: store temperature and pressure adc values on 3 byte array instead of using the type __le32. Uses function get_unaligned_le24 to convert the little-endian encoded 3 byte value to an integer. - Patch 4: drops custom macro le16_from_bytes and use get_unaligned_le16. - Patch 4: generate masks using GENMASK macro. - Patch 4: use FIELD_PREP to generate bitfields for registries. - Patch 4: dropped stray formatting change. - Patch 5: adds sanity checks in bmp280_read_raw for channel properties only available in the BMP380. - Patch 5: on bmp280_write_* checks if a problem occurred committing new configuration and tries to restore previous working configuration to keep the sensor in a previous working state. - Patch 5: refactored bmp380_chip_config to only check for configuration errors when a configuration change is detected. - Patch 5: improved invalid configuration detection on BMP380 restarting measurement loop to force a new measurement after the configuration is updated. Previous patch version available on: https://lore.kernel.org/all/cover.1659872590.git.ang.iglesiasg@xxxxxxxxx/ Angel Iglesias (9): iio: pressure: bmp280: reorder local variables following reverse xmas tree iio: pressure: bmp280: use FIELD_GET, FIELD_PREP and GENMASK iio: pressure: bmp280: Simplify bmp280 calibration data reading iio: pressure: bmp280: simplify driver initialization logic iio: pressure: bmp280: Fix alignment for DMA safety iio: pressure: bmp280: reorder i2c device tables declarations iio: pressure: bmp280: Add support for BMP380 sensor family dt-bindings: iio: pressure: bmp085: Add BMP380 compatible string iio: pressure: bmp280: Add more tunable config parameters for BMP380 .../bindings/iio/pressure/bmp085.yaml | 4 +- drivers/iio/pressure/Kconfig | 6 +- drivers/iio/pressure/bmp280-core.c | 962 +++++++++++++++--- drivers/iio/pressure/bmp280-i2c.c | 15 +- drivers/iio/pressure/bmp280-regmap.c | 55 + drivers/iio/pressure/bmp280-spi.c | 5 + drivers/iio/pressure/bmp280.h | 164 ++- 7 files changed, 1018 insertions(+), 193 deletions(-) base-commit: 2f61ff8272967c9bdcba810aa978170814b08f7c -- 2.37.3
