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* iio: event_monitor: report unsupported eventsLinus Walleij2015-08-161-1/+5
| | | | | | | | | | This makes the event monitor bail out with a helpful error message if a device does not support events, as a related fix to iio core now makes it return -ENODEV properly. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: st_sensors: add debugfs register read hookLinus Walleij2015-08-166-0/+30
| | | | | | | | | | This adds a debugfs hook to read/write registers in the ST sensors using debugfs. Proved to be awesome help when trying to debug why IRQs do not arrive. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* Documentation: iio-trig-sysfs: Add remove_trigger attribute ABICristina Opriceana2015-08-161-0/+11
| | | | | | | | This patch adds the documentation ABI for the remove_trigger attribute, provided by the iio-trig-sysfs stand-alone driver. Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* Documentation: iio-trig-sysfs: Document add_trigger attributeCristina Opriceana2015-08-161-0/+11
| | | | | | | | This patch adds the ABI documentation for the add_trigger attribute, which is provided by the iio-trig-sysfs stand-alone driver. Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: bmg160: Remove remaining uses of i2c_clientMarkus Pargmann2015-08-161-30/+29
| | | | | Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: bmg160: Use generic dev_drvdataMarkus Pargmann2015-08-161-5/+5
| | | | | | | | | i2c_get_clientdata() is specifically for i2c. Replace it with the generic dev_get/set_drvdata() to support different protocols. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: bmg160: Remove i2c_client from data structMarkus Pargmann2015-08-161-32/+32
| | | | | | | | | | | | i2c_client variable is not really used anymore in the core driver. It is only used to get the device to make proper outputs. This patch replaces all i2c_client usage through direct usage of the device pointer. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: bmg160: Use i2c regmap instead of direct i2c accessMarkus Pargmann2015-08-162-111/+88
| | | | | | | | | This patch introduces regmap usage into the driver. This is done to later easily support the SPI interface of this chip. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Move generic buffer implementations to sub-directoryLars-Peter Clausen2015-08-168-26/+35
| | | | | | | | | | | | | | For generic IIO trigger implementations we already have a sub-directory, but the generic buffer implementations currently reside in the IIO top-level directory. The main reason is that things have historically grown into this form. With more generic buffer implementations on its way now is the perfect time to clean this up and introduce a sub-directory for generic buffer implementations to avoid too much clutter in the top-level directory. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Move callback buffer to its own moduleLars-Peter Clausen2015-08-153-2/+14
| | | | | | | | | | | | | Currently the IIO callback buffer implementation is directly built into the IIO core module when enabled. Given that the callback buffer module is standalone functionallity there is really no reason to do this. So move it to its own module. Also rename the source to follow the standard IIO module naming convention as well as add a license notice to the file. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio:adc:cc10001_adc: resort entry in Kconfig and MakefileHartmut Knaack2015-08-122-12/+12
| | | | | | | | Move the entry for the CC 10001 ADC driver in Kconfig and Makefile up to maintain alphabetic order. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio:magnetometer:bmc150_magn: sort entry alphabeticallyHartmut Knaack2015-08-122-17/+19
| | | | | | | | | | Sort the entry for bmc105_magn in Kconfig and Makefile to its correct position. Also add the minor module information for completeness. Fixes: c91746a2361d ("iio: magn: Add support for BMC150 magnetometer") Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio:light:stk3310: adjust indentationHartmut Knaack2015-08-121-3/+3
| | | | | | | | Adjust some indentation issues as spotted by checkpatch.pl --strict Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Reviewed-by: Tiberiu Breana <tiberiu.a.breana@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio:light:stk3310: use correct names and type for stateHartmut Knaack2015-08-121-5/+5
| | | | | | | | | Indicate the bit number of predefined states, make use of these names and change the state type in _resume to u8 to avoid type casting. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Reviewed-by: Tiberiu Breana <tiberiu.a.breana@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio:light:stk3310: add more error handlingHartmut Knaack2015-08-121-14/+45
| | | | | | | | | | | | | | Check for the following error cases: * lower boundary for val in _write_event * return value of regmap_(field_)read * possible values for chan->type * return value of stk3310_gpio_probe Also add an error path in _probe to put the sensor back into stand-by mode in case of serious errors. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio:adc:berlin2-adc: coding style cleanupHartmut Knaack2015-08-121-29/+35
| | | | | | | | Some adjustment of indentation to make checkpatch.pl happy in strict mode. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio:adc:berlin2-adc: enable interrupts with mutex lockedHartmut Knaack2015-08-121-9/+8
| | | | | | | | | Move the call to enable channel interrupts into its _read() function to have it protected by a mutex. This ensures that only one channel is sampled at a time. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio:adc:berlin2-adc: use GENMASK and BIT for masksHartmut Knaack2015-08-121-5/+5
| | | | | | | | Make use of GENMASK for consecutive bitmasks and BIT for single bitmasks. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* Merge tag 'iio-for-4.3b-2' of ↵Greg Kroah-Hartman2015-08-1267-574/+3148
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: Second set of new device support, features and cleanup for the 4.3 cycle. Take 2 also includes a fix set that was too late for the 4.2 cycle. As we had a lot of tools and docs work in this set, I have broken those out into their own categories in this description. Fixes from the pull request '4th set of IIO fixes for the 4.2 cycle'. * Poll functions for both event chardev and the buffer one were returning negative error codes (via a positive value). * A recent change to lsiio adding some error handling that was wrong and stopped the tool working. * bmg160 was missing some dependencies in Kconfig * berlin2-adc had a misshandled register (wrote a value rather than a bitmap) New device support * TI opt3001 light sensor * TXC PA12 ALS and proximity sensor. * mcp3301 ADC support (in mcp320x driver) * ST lsm303agr accelerometer and magnetometer drivers (plus some st-sensors common support to allow different WHOAMI register addresses, devices with fixed scale and allow interrupt equiped magnetometers). * ADIS16305, ADIS16367, ADIS16445IMUs (in the adis16400 driver) * ADIS16266 gyro (in the adis16260 driver) * ADIS16137 gyro (in the adis16136 driver) New functionality * mmc35240 DT bindings. * Inverse unit conversion macros to aid handing of values written to sysfs attributes. Core cleanup * Forward declaration of struct iio_trigger to avoid a compile warning. Driver cleanup / fixes * mxs-lradc - Clarify which parts are supported. - Fix spelling erorrs. - Missing/extra includes - reorder includes - add datasheet name listings for all usable channels (to allow them to be bound by name from consumer drivers) * acpi-als - add some function prefixes as per general iio style. * bmc150_magn - replace a magic value with the existing define. * vf610 - determine possible sample frequencies taking into account the electrical characteristics (defining a minimum sample time) * dht11 - whitespace - additional docs - avoid mulitple assignments in one line - Use the new funciton ktime_get_resolution_ns to cleanup a nasty trick previously used for timing. * Fix all drivers that consider 0 a valid IRQ for historical reasons. * Export I2C module alias info where previously missing (to allow autoprobing) * Export OF module alias info where previously missing. * mmc35240 - switch some variables into arrays to improve readability. * mlx90614 - define some magic numbers for readability. * bmc150_magn - expand area locked by a mutex to cover all the use of the data->buffer. - use descriptive naming for a mask instead of a magic value. * berin2-adc - pass up an error code rather that a generic error - constify the iio_chan_spec - some other little tidy ups. * stk8312 - fix a dependency on triggered buffers in kconfig - add a check for invalid attribute values - improve error handling by returning error codes where possible and return immediately where relevant - rework macro defs to use GENMASK etc - change some variable types to reduce unnecessary casting - clean up code style - drop a local buffer copy for bulk reads and use the one in data->buffer instead. * adis16400 - the adis16448 gyroscope scale was wrong. * adis16480 - some more wrong scales for various parts. * adis16300 - has an undocumented product id and serial number registers so use them. * iio_simple_dummy - fix some wrong code indentation. * bmc150-accel - use the chip ID to detect the chip present rather than verifying the expected part was there. This was in response to a wrong ACPI entry on the WinBook TW100. * mma8452 - fix _get_hp_filter_index - drop a double include - pass up an error code rather than rewriting it - range check input values to attribute writes - register defs tidy up using GENMASK and reordering them to be easier to follow. - various coding style cleanups - put the Kconfig entry in the write place (alphabetically). Tools related * Tools cleanup - drop an explicity NULL comparison, some unnecessary braces, use the ARRAY_SIZE macro, send error messages to stderr instead of dropping them in the middle of normal output. * Fix tools to allow that scale and offset attributes are optional. * More tools fixes including allowing true 32bit data (previously an overflow prevented more than 31bits) * Drop a stray header guard that ended up in a c file. * Make calc_digits static as it isn't exported or in the header. * Set ci_array pointer to NULL after free as a protection against non safe usage of the tools core code. Also convert a double pointer to a single one as the extra level of indirection was unnecessary. Docs * DocBook introduction by Daniel Baluta. Glad we are beginning to draw together some more introductory docs to suplement the various tools / examples. * Drop bytes_per_datum sysfs attribute docs as it no longer exists. * A whole load of missing / fixing of kernel-doc for the core of IIO. * Document the trigger name sysfs attribute in the ABI docs. * Minor typos in the ABI docs related to power down modes.
| * iio: event: Remove negative error code from iio_event_pollCristina Opriceana2015-08-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | Negative return values are not supported by iio_event_poll since its return type is unsigned int. Fixes: f18e7a068a0a3 ("iio: Return -ENODEV for file operations if the device has been unregistered") Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: industrialio-buffer: Fix iio_buffer_poll return valueCristina Opriceana2015-08-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Change return value to 0 if no device is bound since unsigned int cannot support negative error codes. Fixes: f18e7a068 ("iio: Return -ENODEV for file operations if the device has been unregistered") Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: lsiio: fix error code handling errorLinus Walleij2015-08-121-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit acf50b3586f8d8a7530b905e111dda41876d38f4 "tools:iio:lsiio: add error handling" introduced error handling of errors returned from read_sysfs_string(), but with a simple if (retval), missing the fact that these functions return a positive value if the read was successful. As a result lsiio regresses and does not show any devices on my filesystem. Fix this by checking for only negative error codes. Cc: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: bmg160: IIO_BUFFER and IIO_TRIGGERED_BUFFER are requiredMarkus Pargmann2015-08-121-1/+2
| | | | | | | | | | | | | | | | | | | | This patch adds selects for IIO_BUFFER and IIO_TRIGGERED_BUFFER. Without IIO_BUFFER, the driver does not compile. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio:adc:berlin2-adc: Fix register definitionHartmut Knaack2015-08-121-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Active channel number is stored in BERLIN2_SM_CTRL as value, instead of a bit map. The masks for channel interrupts and data ready are a 16 bits wide bit map each, instead of just 4 bits. Also correct the data mask for the temperature sensor, which was Reported-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * tools: iio: remove unnecessary double pointerJoo Aun Saw2015-08-082-7/+7
| | | | | | | | | | | | | | Remove unnecessary double pointer from channel sorting function. Signed-off-by: Joo Aun Saw <jasaw@dius.com.au> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * tools: iio: Set caller's ci_array pointer to NULL after freeJoo Aun Saw2015-08-081-0/+2
| | | | | | | | | | | | | | | | | | On error, caller's ci_array is freed and set to NULL to avoid potential double free if some other user of this code is not sufficiently careful. Counter is reset to zero for consistency. Signed-off-by: Joo Aun Saw <jasaw@dius.com.au> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: Fix typos in ABI documentationVladimir Barinov2015-08-081-3/+3
| | | | | | | | | | | | | | Fix typos in ABI documentation Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio:accel:mma8452: reorder Kconfig entryHartmut Knaack2015-08-081-12/+12
| | | | | | | | | | | | | | Move the entry in Kconfig to its alphabetically correct position. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio:accel:mma8452: coding style cleanupHartmut Knaack2015-08-081-38/+68
| | | | | | | | | | | | | | | | | | | | Some coding style cleanups, mainly indicated by checkpatch.pl, which includes indentation changes, drop spaces after casts and befor tabs. Also insert empty lines after logical blocks and before unconditional returns. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio:accel:mma8452: rework register definitionsHartmut Knaack2015-08-081-48/+45
| | | | | | | | | | | | | | | | | | Rework register definitions to be sorted by register and bit number, with bit definitions cascaded under the appropriate register, use GENMASK for consecutive bitmasks and realign properly. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio:accel:mma8452: check values to be writtenHartmut Knaack2015-08-081-3/+5
| | | | | | | | | | | | | | Check values to be written to the device for valid lower and upper bounds. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio:accel:mma8452: pass up real error codeHartmut Knaack2015-08-081-3/+3
| | | | | | | | | | | | | | Pass up the error code provided by functions. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio:accel:mma8452: drop double includeHartmut Knaack2015-08-081-1/+0
| | | | | | | | | | | | | | | | One inclusion of linux/iio/trigger_consumer.h is sufficient. Fixes: ae6d9ce05691b ("iio: mma8452: Add support for interrupt driven triggers.") Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio:accel:mma8452: fix _get_hp_filter_indexHartmut Knaack2015-08-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | To iterate through the available frequencies of mma8452_hp_filter_cutoff[], the array size of a row of that table needs to be provided to _get_int_plus_micros_index(). Fixes: 1e79841a00e46 ("iio: mma8452: Add highpass filter configuration.") Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio:accel:bmc150-accel: Use the chip ID to detect sensor variantBastien Nocera2015-08-081-27/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of using the I2C or ACPI ID to determine which variant of the chipset to use, determine that from the chip ID. Under Windows, the same driver is used for those variants and, despite incorrect ACPI data, it is able to load and operate the accelerometer. Fixes the accelerometer failing with: bmc150_accel i2c-BMA250E:00: Invalid chip f8 on the WinBook TW100 Signed-off-by: Bastien Nocera <hadess@hadess.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio:accel:bmc150-accel: Move bmc150_accel_chip_init()Bastien Nocera2015-08-081-57/+57
| | | | | | | | | | | | | | | | Move bmc150_accel_chip_init() so that we can use bmc150_accel_chip_info_tbl[] in it. Signed-off-by: Bastien Nocera <hadess@hadess.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * staging: iio_simple_dummy: Fix indentation errorsLars Svensson2015-08-081-2/+2
| | | | | | | | | | | | | | | | | | Fixing indentation errors in drivers/staging/iio/iio_simple_dummy_events.c. Signed-off-by: Lars Svensson <lars1.svensson@sonymobile.com> Acked-by: Daniel Baluta <daniel.baluta@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: adis16136: Add ADIS16137 supportLars-Peter Clausen2015-08-081-0/+6
| | | | | | | | | | | | | | | | The ADIS16137 is register map compatible to the ADIS16136, but has a different scale factor for the gyroscope output. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: adis16400: Add ADIS16445 supportLars-Peter Clausen2015-08-081-0/+26
| | | | | | | | | | | | | | | | | | The ADIS16445 is similar to the ADIS16448, but without the magnetometer and pressure channels as well as different scale factors for the gyroscope and accelerometer outputs. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: adis16400: Add ADIS16367 supportLars-Peter Clausen2015-08-081-0/+14
| | | | | | | | | | | | | | | | The ADIS16367 is mostly register compatible to the ADIS16360. The only difference is the scale factor for the gyroscope output. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: adis16260: Add ADIS16266 supportLars-Peter Clausen2015-08-081-39/+98
| | | | | | | | | | | | | | | | | | The ADIS16266 is mostly register compatible to the ADIS16260. The difference is a different gyroscope scale factor as well not having the relative angular displacement channel. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: adis16400: Add ADIS16305 supportLars-Peter Clausen2015-08-081-0/+1
| | | | | | | | | | | | | | The ADIS16305 is fully register map compatible to the ADIS16300. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: adis16400: adis16300 has product ID and serial numberLars-Peter Clausen2015-08-081-1/+2
| | | | | | | | | | | | | | | | The ADIS16300 has the product ID and serial number registers, they are just not documented. Set the appropriate flags so the driver makes use of them. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: adis16480: Fix scale factorsLars-Peter Clausen2015-08-081-6/+33
| | | | | | | | | | | | | | | | | | The different devices support by the adis16480 driver have slightly different scales for the gyroscope and accelerometer channels. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: Add inverse unit conversion macrosLars-Peter Clausen2015-08-081-0/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add inverse unit conversion macro to convert from standard IIO units to units that might be used by some devices. Those are useful in combination with scale factors that are specified as IIO_VAL_FRACTIONAL. Typically the denominator for those specifications will contain the maximum raw value the sensor will generate and the numerator the value it maps to in a specific unit. Sometimes datasheets specify those in different units than the standard IIO units (e.g. degree/s instead of rad/s) and so we need to do a unit conversion. From a mathematical point of view it does not make a difference whether we apply the unit conversion to the numerator or the inverse unit conversion to the denominator since (x / y) / z = x / (y * z). But as the denominator is typically a larger value and we are rounding both the numerator and denominator to integer values using the later method gives us a better precision (E.g. the relative error is smaller if we round 8000.3 to 8000 rather than rounding 8.3 to 8). This is where in inverse unit conversion macros will be used. Marked for stable as used by some upcoming fixes. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: adis16400: Fix adis16448 gyroscope scaleLars-Peter Clausen2015-08-081-1/+1
| | | | | | | | | | | | | | | | Use the correct scale for the adis16448 gyroscope output. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: trigger: Add missing fields in kernel docsCristina Opriceana2015-08-081-3/+24
| | | | | | | | | | | | | | | | Fix kernel docs warnings by adding the missing description for each of the existing function parameters. Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: Documentation: Add trigger name attribute ABI documentationCristina Opriceana2015-08-081-0/+9
| | | | | | | | | | | | | | | | | | This patch adds an entry in ABI Documentation for the name attribute issued when a trigger is created. Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com> Acked-by: Daniel Baluta <daniel.baluta@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * DocBook: Add initial documentation for IIODaniel Baluta2015-08-082-1/+698
| | | | | | | | | | | | | | | | | | | | | | This is intended to help developers faster find their way inside the Industrial I/O core and reduce time spent on IIO drivers development. Signed-off-by: Daniel Baluta <daniel.baluta@intel.com> Acked-by: Crt Mori <cmo@melexis.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: declare struct to fix warningPengyu Ma2015-08-081-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When compile iio related driver the following warning shown: include/linux/iio/trigger.h:35:34: warning: 'struct iio_trigger' declared inside parameter list int (*set_trigger_state)(struct iio_trigger *trig, bool state); include/linux/iio/trigger.h:38:18: warning: 'struct iio_dev' declared inside parameter list struct iio_dev *indio_dev); 'struct iio_dev' and 'struct iio_trigger' was used before declaration, forward declaration for these structs to fix warning. Signed-off-by: Pengyu Ma <pengyu.ma@windriver.com> Acked-by: Daniel Baluta <daniel.baluta@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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