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2015-01-25iio: hid-sensor-press: Introduce PMSrinivas Pandruvada1-8/+1
Use common hid sensor iio pm functions. Also the poll time read and wait is part of power up function of hid sensor iio pm function, so remove from the client drivers. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-12-26iio:pressure:bmp280: cleanupHartmut Knaack1-10/+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>
2014-12-12iio: bmp280: refactor compensation codeVlad Dogaru1-88/+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>
2014-11-05iio:pressure:bmp280: fix pressure calculationHartmut Knaack1-12/+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>
2014-10-25bmp280: use correct routine for divisionVlad Dogaru1-1/+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>
2014-10-22iio: add bmp280 pressure and temperature driverVlad Dogaru3-0/+467
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>
2014-10-04iio:common: Set the device pointer into ST common sensors libraryDenis CIOCCA2-2/+0
Signed-off-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-10-04iio:pressure: Changed pressure data variable name to press_dataDenis CIOCCA4-35/+37
This patch fix pressure data variable name. Usually pdata name it is used for platform data. Signed-off-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-10-04iio:pressure: Removed unnecessary parameter on common_probe functionDenis CIOCCA4-9/+7
Signed-off-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-10-04iio:imu: changed structure name from st_sensors to st_sensor_settingsDenis CIOCCA1-10/+10
This patch change structure name and related variables names. Signed-off-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-08-26iio: remove .owner field for driver using module_platform_driverSanjeev Sharma1-1/+0
This patch removes the .owner field for drivers which use the platform_driver_register api because this is overriden in _platform_driver_register. Signed-off-by: Sanjeev Sharma <Sanjeev_Sharma@mentor.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-07-13Merge 3.16-rc5 into staging-nextGreg Kroah-Hartman1-5/+2
We want the fixes in -rc5 in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-11iio: st_sensors: add devicetree probing supportLinus Walleij1-0/+23
The I2C devices that make up the STMicroelectronics MEMS sensors may be sneakily enabled by cleverly giving the device node the same name as a string match from the platform device ID table. However the right method is to use the compatible string. On detection, the ST sensors use the ID string to probe and instatiate the right sensor driver, so pass the kernel-internal ID string in the .data field of the OF match table, and set the I2C client name to this name when a compatible match is used. This avoids having misc Linux-specific strings floating around in the device tree. Cc: Lee Jones <lee.jones@linaro.org> Cc: Denis CIOCCA <denis.ciocca@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-07-07iio:st sensors: remove custom sampling frequence attribute in favour of core ↵Jonathan Cameron1-2/+25
support. This allows in kernel client drivers to access this Signed-off-by: Jonathan Cameron <jic23@kernel.org> Cc: Denis Ciocca <denis.ciocca@st.com> Reviewed-by: Hartmut Knaack <knaack.h@gmx.de>
2014-07-05iio: hid-sensor-press: Fix return valuesSachin Kamat1-5/+2
IIO_CHAN_INFO_SAMP_FREQ and IIO_CHAN_INFO_HYSTERESIS cases ignored the actual return values (which could be -EINVAL) and instead returned IIO_VAL_INT_PLUS_MICRO always. Return the actual value obtained from the functions. Both functions return IIO_VAL_INT_PLUS_MICRO upon success. Agreed with by Srinivas. Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com> Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-06-22Merge 3.16-rc2 into staging-nextGreg Kroah-Hartman1-3/+3
We want the staging fixes here as well.
2014-06-18Merge tag 'iio-fixes-for-3.16a' of ↵Greg Kroah-Hartman1-3/+3
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus Jonathan writes: First set of IIO fixes for the 3.16 cycle. A mixed bag of fixes, many of which feel just to late for 3.15. * hid sensors - some devices need a feature report request in order to change power state. This isn't part of the spec, but has been observed on several devices and does no harm to others. * mpl3115 has had two errors in the buffer description fixed. The presure is signed, not unsigned and the temperature has 12 bits rather than 16. These could lead to incorrect interpretation of the data in userspace. * tsl2x7x - the high byte of the proximity thresholds should be written along with the low byte (which was). This could lead to interesting results with large thresholds. * twl4030 - a flag to specify processed values were required was not set when initializing a reading. As such values returned were in an unknown state. Fixed by simply initializing it appropriately. * IIO_SIMPLE_DUMMY_BUFFER did not select IIO_BUFFER leading to randconfig build errors. * ak8975 was applying an unwanted le16_to_cpu conversion as the i2c framework already performs one. As such for big endian systems, the bytes would be in the wrong order in the magnetic field measurements reported. * mxs-lradc - the controllable voltage dividers were not enabled / disabled for later channels than the first one during conversion. * at91_adc error handling returned -ENOMEM in a u8. Return value of at91_adc_get_trigger_value_by_name changed to int thus allowing -ENOMEM and also original values to be returned. * mcb - mcb_request_mem returns and ERR_PTR but the caller was checking for NULL to detect an error.
2014-06-14iio: Add t5403 barometric pressure sensor driverPeter Meerwald3-0/+286
16-bit pressure and temperature sensor the chip can do I2C and SPI, only the I2C interface is supported by the driver at the moment datasheet: http://www.epcos.com/inf/57/ds/T5400.pdf application note: http://www.epcos.com/blob/993154/download/1/t5403-applicationnote.pdf an out-of-tree driver targetting the input subsystem is at https://github.com/unixphere/t5400, it was rejected here: http://comments.gmane.org/gmane.linux.kernel.input/28107 v2: (thanks Hartmut Knaack) * fix MODE_HIGH, equals 2 * check INT_TIME mask in write_raw() Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Cc: Stefan Nilsson <stefan.nilsson@unixphere.com> Reviewed-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-05-29iio: Fix two mpl3115 issues in measurement conversionPeter Meerwald1-3/+3
(i) pressure is 20-bit unsigned, not signed; the buffer description is incorrect; for raw reads, this is just cosmetic (ii) temperature is 12-bit signed, not 16-bit; this affects readout of temperatures below zero as the sign bit is incorrectly processed reported via private mail Cc: stable@vger.kernel.org Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Reported-by: Robert Deliën <robert@delien.nl> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-05-05iio: hid-sensors: Pressure: Raw read supportSrinivas Pandruvada1-2/+15
Added support for raw reading of channel. If the sensor is powered off, it will turn on for reading value. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-05-05iio: hid-sensors: Add API to power on/offSrinivas Pandruvada1-4/+3
Added an API to allow client drivers to turn ON and OFF sensors for quick read. Added data_read as counting varaible instead of boolean, so that sensor is powered off only when last user released it. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-05-05iio: hid-sensors: Pressure: adjust scale and offsetSrinivas Pandruvada1-4/+13
Using units and unit exponent to calculate scale which is compliant to IIO ABI. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-05-03iio: Add Freescale MPL115A2 pressure / temperature sensor driverPeter Meerwald3-0/+222
I2C-controlled sensor with 10-bit pressure and temperature measurement datasheet: http://cache.freescale.com/files/sensors/doc/data_sheet/MPL3115A2.pdf v2: * use devm_iio_device_register() Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-04-26iio: st_sensors: move regulator retrieveal to coreLinus Walleij1-37/+2
Currently the pressure sensor has code to retrieve and enable two regulators for Vdd and Vdd IO, but actually these voltage inputs are found on all of these ST sensors, so move the regulator handling to the core and make sure all the ST sensors call these functions on probe() and remove() to enable/disable power. Here also mover over to obtaining the regulator from the *parent* device of the IIO device, as the IIO device is created on-the-fly in this very subsystem it very unlikely evert have any regulators attached to it whatsoever. It is much more likely that the parent is a platform device, possibly instantiated from a device tree, which in turn have Vdd and Vdd IO supplied assigned to it. Cc: Lee Jones <lee.jones@linaro.org> Cc: Denis CIOCCA <denis.ciocca@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-04-26iio: st_sensors: announce registered sensorsLinus Walleij1-0/+3
It is pretty helpful to know already from dmesg that a certain device is successfully registered, instead of having to browse sysfs to see if it's actually there. Cc: Lee Jones <lee.jones@linaro.org> Cc: Denis CIOCCA <denis.ciocca@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-02-22iio:pressure: Add support for LPS25H pressure sensorDenis CIOCCA5-8/+84
This patch adds support for the new barometer sensor: LPS25H. Signed-off-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-02-22iio: hid-sensors: Added Pressure Sensor driverArchana Patni3-0/+391
Added usage id processing for Pressure Sensor. This uses IIO interfaces for triggered buffer to present data to user mode. This uses HID sensor framework for registering callback events from the sensor hub. Signed-off-by: Archana Patni <archana.patni@intel.com> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-01-11iio:pressure:mpl3115: Fix sparse cast to restricted __be32 warningPeter Meerwald1-1/+1
>> >> drivers/iio/pressure/mpl3115.c:101:46: sparse: cast to restricted __be32 >> >> drivers/iio/pressure/mpl3115.c:115:46: sparse: cast to restricted __be32 Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-11-24iio: Add Freescale MPL3115A2 pressure / temperature sensor driverPeter Meerwald3-0/+342
I2C-controlled MEMS sensor with 20-bit pressure measurement (pascal) and 12-bit temperature measurement driver only exposes basic functionality, see TODO remarks datasheet: http://cache.freescale.com/files/sensors/doc/data_sheet/MPL3115A2.pdf v2: * store 20-bit value in 32-bit buffer element (instead of 24-bit) * zero buffer to prevent kernel data leak to userspace * fix mutex unlock in trigger handler (thanks Andi Shyti) Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Reviewed-by: Andi Shyti <andi@etezian.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-10-23iio:pressure: Adds LPS001WP support also on spi interface and Kconfig fixDenis CIOCCA2-1/+2
Signed-off-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-10-16iio:st_pressure: Remove redundant call to iio_sw_buffer_preenable().Lars-Peter Clausen1-10/+1
The equivalent of iio_sw_buffer_preenable() is now done in the IIO buffer core, so there is no need to do this from the driver anymore. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-23iio: pressure-core: st: Provide support for the Vdd_IO power supplyLee Jones1-1/+12
The power to some of the sensors are controlled by regulators. In most cases these are 'always on', but if not they will fail to work until the regulator is enabled using the relevant APIs. This patch allows for the Vdd_IO power supply to be specified by either platform data or Device Tree. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-23iio: pressure-core: st: Provide support for the Vdd power supplyLee Jones1-0/+28
The power to some of the sensors are controlled by regulators. In most cases these are 'always on', but if not they will fail to work until the regulator is enabled using the relevant APIs. This patch allows for the Vdd power supply to be specified by either platform data or Device Tree. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-21iio:press: Register buffer also without specific triggerDenis CIOCCA1-9/+8
This patch fix buffer registration that allows to use generic IIO trigger. Signed-off-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-21iio: pressure: st: Add support for new LPS001WP pressure sensorLee Jones3-0/+86
Here we use existing practices to introduce support for another pressure/temperature sensor, the LPS001WP. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-21iio: pressure-core: st: Clean-up probe() functionLee Jones1-13/+15
This patch contains some pretty basic clean-ups in probe() pertaining to the simplification of error handling and a couple of readability adaptions. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-21iio: sensors-core: st: Support sensors which don't have a Data Ready pinLee Jones1-1/+2
Not all ST's sensors support data ready, so let's make the declaration of one conditional. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: pressure-core: st: Allow for number of channels to varyLee Jones1-1/+2
At the moment the number of channels specified is dictated by the first sensor supported by the driver. As we add support for more sensors this is likely to vary. Instead of using the ARRAY_SIZE() of the LPS331AP's channel specifier we'll use a new adaptable 'struct st_sensors' element instead. Signed-off-by: Lee Jones <lee.jones@linaro.org> Acked-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: pressure-core: st: Expand and rename LPS331AP's channel descriptorLee Jones1-11/+34
Due to the MACRO used, the task of reading, understanding and maintaining the LPS331AP's channel descriptor is substantially difficult. This patch is based on the view that it's better to have easy to read, maintainable code than to save a few lines here and there. For that reason we're expanding the array so initialisation is completed in full. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: pressure-core: st: Describe LPS331AP defines by nameLee Jones1-48/+46
They're currently named *_1_*, for 'Sensor 1', but the code will be much more readable if we use the naming convention *_LPS331AP_* instead. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: sensors-core: st: Allow full-scale to be an optional featureLee Jones1-2/+4
Some chips either don't support it or fail to provide adequate documentation, so sometimes it's impossible to enable the feature even if it is supported. Signed-off-by: Lee Jones <lee.jones@linaro.org> Acked-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-03iio: pressure: st_pressure: Use devm_iio_device_allocSachin Kamat3-23/+8
Using devm_iio_device_alloc makes code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Cc: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-03iio: lps331ap: Modify in_temp_scale calculation wayJacek Anaszewski1-1/+4
This patch modifies the way how the in_temp_scale output value is calculated. With this implementation it is more clear how the value is obtained. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-03iio: Add a comment to about alphabetical order to Kconfigs and MakefilesLars-Peter Clausen2-0/+3
Keeping Makefile and Kconfig entries in alphabetical order usually works better than just appending new entries at the end, since it reduces the amount of conflicts. This patch adds a comment to the IIO Kconfig and Makefile files to document that the entries should be kept in alphabetical order. Also reorder those entries which weren't in alphabetical order yet. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-03iio: reword help text of several IIO_ST driversPeter Meerwald1-2/+2
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: "Denis Ciocca" <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-03iio: fix Kconfig typosPeter Meerwald1-4/+4
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-03iio: Added ST-sensors platform data to select the DRDY interrupt pinDenis CIOCCA4-7/+23
This patch add support to redirect the DRDY interrupt on INT1 or INT2 on accelerometer and pressure sensors. Signed-off-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-07-16iio: lps331ap: Fix wrong in_pressure_scale output valueJacek Anaszewski1-2/+4
This patch fixes improper in_pressure_scale output that is returned by the lps331ap barometer sensor driver. According to the documentation the pressure after applying the scale has to be expressed in kilopascal units. With erroneous implementation the scale value larger by two orders of magnitude is returned - 2441410 instead of 24414. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-06-05iio:pressure: Add STMicroelectronics pressures driverDenis CIOCCA7-0/+614
This patch adds a generic pressure driver for STMicroelectronics pressure sensors, currently it supports: LPS331AP. Signed-off-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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