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path: root/drivers/iio/pressure/bmp280.c
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* iio: pressure: bmp280: split driver in logical partsLinus Walleij2016-07-031-1201/+0
| | | | | | | | | | | | | | This splits the BMP280 driver in three logical parts: the core driver bmp280-core that only operated on a struct device * and a struct regmap *, the regmap driver bmp280-regmap that can be shared between I2C and other transports and the I2C module driver bmp280-i2c. Cleverly bake all functionality into a single object bmp280.o so that we still get the same module binary built for the device in the end, without any fuzz exporting symbols to the left and right. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: pressure: bmp280: support supply regulatorsLinus Walleij2016-07-031-4/+62
| | | | | | | | | | | | | | | | | The BMP085/BMP180/BMP280 is supplied with two power sources: VDDA (analog power) and VDDD (digital power). As these may come from regulators (as on the APQ8060 Dragonboard) we need the driver to attempt to fetch and enable these regulators. We FAIL if we cannot: boards should either define: - Proper regulators if present - Define fixed regulators if power is hardwired to the component - Rely on dummy regulators (will be present on all DT systems and any boardfile system that calls regulator_has_full_constraints(). Cc: Mark Brown <broonie@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: pressure: bmp280: add reset GPIO line handlingLinus Walleij2016-06-301-0/+10
| | | | | | | | | | On the APQ8060 Dragonboard the reset line to the BMP085 pressure sensor is not deasserted on boot, so the driver needs to handle this. For a simple GPIO line supplied as a descriptor (from a board file, device tree or ACPI) this does the trick. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: pressure: bmp280: support device tree initializationLinus Walleij2016-06-301-0/+15
| | | | | | | | | | | | | This adds device tree support to the BMP085, BMP180 and BMP280 pressure sensors. Tested on the Qualcomm APQ8060 Dragonboard: iio:device1$ cat in_temp_input 26700 iio:device1$ cat in_pressure_input 99.185000000 Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* Merge 4.7-rc4 into staging-nextGreg Kroah-Hartman2016-06-201-2/+2
|\ | | | | | | | | | | | | We want the fixes in here, and we can resolve a merge issue in drivers/iio/industrialio-trigger.c Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * iio: pressure: bmp280: fix error message for wrong chip idAkinobu Mita2016-05-141-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The bmp280 driver also supports BMP180 which has a different chip id with BMP280. The probe routine verifies that the device reports the correct chip id but the error message is confusing as if BMP280's chip id is always expected. Reported-by: Matt Ranostay <mranostay@gmail.com> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Matt Ranostay <mranostay@gmail.com> Cc: Vlad Dogaru <vlad.dogaru@intel.com> Cc: Christoph Mair <christoph.mair@gmail.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: pressure: bmp280: add humidity supportMatt Ranostay2016-05-211-2/+198
|/ | | | | | | | Enable humidity support for the BME280 part Signed-off-by: Matt Ranostay <matt.ranostay@intel.com> Acked-by: Vlad Dogaru <vlad.dogaru@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: pressure: bmp280: add ability to control oversampling rateAkinobu Mita2016-04-251-18/+185
| | | | | | | | | | This adds ability to control the oversampling ratio of the temperature and pressure measurement for both bmp180 and bmp280. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Vlad Dogaru <vlad.dogaru@intel.com> Cc: Christoph Mair <christoph.mair@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: pressure: bmp280: add support for BMP180Akinobu Mita2016-04-251-14/+353
| | | | | | | | | | | | | This adds support for the BMP180 to the bmp280 iio driver. The BMP180 has already been supported by misc/bmp085 driver but it doesn't use iio framework. This change adds the kconfig dependency not to be selected both of them in order to avoid any issues. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Vlad Dogaru <vlad.dogaru@intel.com> Cc: Christoph Mair <christoph.mair@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: pressure: bmp280: fix temp compensationIrina Tirdea2015-04-091-0/+1
| | | | | | | | | | | | | Temperature reads on bmp280 device always return 0, due to a missing step in the compensation formula (data->tfine is never initialized). Initialize data->tfine value so we get correct temperature and pressure values. Signed-off-by: Irina Tirdea <irina.tirdea@intel.com> Reviewed-by: Vlad Dogaru <vlad.dogaru@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio:pressure:bmp280: cleanupHartmut Knaack2014-12-261-10/+6
| | | | | | | | | | | | | | | | | | The calculations for temperature and pressure compensation were already slightly optimized in comparison to the datasheet. So, it makes sense to optimize even a bit more, making proper use of C operators: - variable t in bmp280_compensate_temp() can be eliminated by directly returning the result of the relevant equation. - make use of the += operator and eliminate an unnecessary parenthesis level in bmp280_compensate_press(). When the initialization of the ctrl_meas register fails, the error message will now mention the right register name. During probe, i2c_set_clientdata() is called, although it is not necessary. Drop it. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Reviewed-by: Vlad Dogaru <vlad.dogaru@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: bmp280: refactor compensation codeVlad Dogaru2014-12-121-88/+52
| | | | | | | | | This version of the code avoids extra memory copy operations and is somewhat smaller in code size. Signed-off-by: Vlad Dogaru <vlad.dogaru@intel.com> Acked-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio:pressure:bmp280: fix pressure calculationHartmut Knaack2014-11-051-12/+12
| | | | | | | | | | | | | | According to the datasheet and as defined in struct bmp280_comp_press, dig_p1 is of type u16, while dig_p2 to dig_p9 are of type s16. In bmp280_read_compensation_press(), values read from the device were treated as the wrong type. In bmp280_read_press() the fractional part of the measured pressure is calculated wrong. A better way is to use *val for the raw pressure and *val2 for the quotient and let the core do the proper conversion using IIO_VAL_FRACTIONAL. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Acked-by: Vlad Dogaru <vlad.dogaru@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* bmp280: use correct routine for divisionVlad Dogaru2014-10-251-1/+1
| | | | | | | | The proper way to divide two signed 64-bit values is to use div64_s64. Signed-off-by: Vlad Dogaru <vlad.dogaru@intel.com> Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: add bmp280 pressure and temperature driverVlad Dogaru2014-10-221-0/+455
Minimal implementation, can read temperature and data using direct mode. Datasheet available at <http://ae-bst.resource.bosch.com/media/products/dokumente/bmp280/BST-BMP280-DS001-09.pdf> Signed-off-by: Vlad Dogaru <vlad.dogaru@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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