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2017-03-05iio: magnetometer: ak8974: remove incorrect __exit markupsDmitry Torokhov1-2/+2
Even if bus is not hot-pluggable, devices can be unbound from the driver via sysfs, so we should not be using __exit annotations on remove() methods. The only exception is drivers registered with platform_driver_probe() which specifically disables sysfs bind/unbind attributes. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Cc: <stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-21iio: magnetometer: mag3110: claim direct mode during raw writesAlison Schofield1-10/+20
Driver was checking for direct mode but not locking it. Use claim/release helper functions to guarantee the device stays in direct mode during raw writes. Signed-off-by: Alison Schofield <amsfield22@gmail.com> Acked-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-14iio: magnetometer: ak8974: remove redundant zero timeout checkColin Ian King1-6/+2
At the end of the delay loop timeout will always be zero and hence the check for !timeout will always be true. Remove the redundant check and the redundant return 0 at the end of the function. Fixes CoverityScan CID#1357168 ("Logically dead code") Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-11-24iio: magnetometer: separate the values of attributes based on their usage ↵Ooi, Joyce1-35/+112
type for HID compass sensor There are 2 usage types (Magnetic Flux and Heading data field) for HID compass sensor, thus the values of offset, scale, and sensitivity should be separated according to their respective usage type. The changes made are as below: 1. Hysteresis: A struct hid_sensor_common rot_attributes is created in struct magn_3d_state to contain the sensitivity for IIO_ROT. 2. Scale: scale_pre_decml and scale_post_decml are separated for IIO_MAGN and IIO_ROT. 3. Offset: Same as scale, value_offset is separated for IIO_MAGN and IIO_ROT. For sensitivity, HID_USAGE_SENSOR_ORIENT_MAGN_FLUX and HID_USAGE_SENSOR_ORIENT_MAGN_HEADING are used for sensivitity fields based on the HID Sensor Usages specifications. Hence, these changes are added on the sensitivity field. Signed-off-by: Ooi, Joyce <joyce.ooi@intel.com> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-11-12iio: magn: st_magn: inline per-sensor dataLinus Walleij1-251/+125
We have #defines for all the individual sensor registers and value/mask pairs #defined at the top of the file and used at exactly one spot. This is usually good if the #defines give a meaning to the opaque magic numbers. However in this case, the semantic meaning is inherent in the name of the C99-addressable fields, and that means duplication of information, and only makes the code hard to maintain since you every time have to add a new #define AND update the site where it is to be used. Get rid of the #defines and just open code the values into the appropriate struct elements. Make sure to explicitly address the .hz and .value fields in the st_sensor_odr_avl struct so that the meaning of all values is clear. This patch is purely syntactic should have no semantic effect. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-10-03iio: magnetometer: ak8974: small endianness fixesIco Doornekamp1-4/+4
Fixes two cases of 'cast to restricted __le16' as reported by sparse. Signed-off-by: Ico Doornekamp <ico@pruts.nl> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-27drivers: iio: magnetometer: Fix sparse endianness warnings cast to ↵Sandhya Bankar1-7/+9
restricted __be16 Fix the following sparse endianness warnings: drivers/iio/magnetometer/ak8975.c:716:16: warning: cast to restricted __le16 drivers/iio/magnetometer/ak8975.c:837:19: warning: cast to restricted __le16 drivers/iio/magnetometer/ak8975.c:838:19: warning: cast to restricted __le16 drivers/iio/magnetometer/ak8975.c:839:19: warning: cast to restricted __le16 Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-08-29iio: magn: ak8974: remove .owner field for driverWei Yongjun1-1/+0
Remove .owner field if calls are used which set it automatically. Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-08-29iio: magn/ak8974: avoid unused function warningArnd Bergmann1-4/+2
The ak8974_configure() function is used only from the PM code, but that can be hidden when CONFIG_PM is disabled: drivers/iio/magnetometer/ak8974.c:201:12: error: 'ak8974_configure' defined but not used [-Werror=unused-function] This replaces the #ifdef with a __maybe_unused annotation, which will work correctly in all configurations and avoid the warning, as the compiler can now see where ak8974_configure is called from. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 7c94a8b2ee8c ("iio: magn: add a driver for AK8974") Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-08-21iio: magnetometer: mag3110: claim direct mode during raw readsAlison Schofield1-8/+15
Driver was checking for direct mode but not locking it. Use claim/release helper functions to guarantee the device stays in direct mode during raw reads. Signed-off-by: Alison Schofield <amsfield22@gmail.com> Cc: Daniel Baluta <daniel.baluta@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-08-15iio: magn: add a driver for AK8974Linus Walleij3-1/+879
This adds a driver for the Asahi Kasei AK8974 and its sibling AMI305 magnetometers. It was deployed on scale in 2009 on a multitude of devices. It is distincly different from AK8973 and AK8975 and needs its own driver. This patch is based on the long lost work of Samu Onkalo at Nokia, who made a misc character device driver for the Maemo/MeeGo Nokia devices, before the time of the IIO subsystem. It was mounted in e.g. the Nokia N950, N8, N86, N97 etc. It is also mounted on the ST-Ericsson HREF reference designs. It works nicely in sysfs: $ cat in_magn_x_raw && cat in_magn_y_raw && cat in_magn_z_raw -55 -101 161 And with buffered reads using a simple HRTimer trigger: $ generic_buffer -c10 -a -n ak8974 -t foo iio device number being used is 3 iio trigger number being used is 2 No channels are enabled, enabling all channels Enabling: in_magn_x_en Enabling: in_magn_y_en Enabling: in_magn_z_en Enabling: in_timestamp_en /sys/bus/iio/devices/iio:device3 foo -58.000000 -102.000000 157.000000 946684970985321044 -60.000000 -98.000000 159.000000 946684971012237548 -60.000000 -106.000000 163.000000 946684971032257080 -62.000000 -94.000000 169.000000 946684971052185058 -58.000000 -98.000000 163.000000 946684971072204589 -54.000000 -100.000000 163.000000 946684971092224121 -53.000000 -103.000000 164.000000 946684971112731933 -50.000000 -102.000000 165.000000 946684971132232666 -61.000000 -101.000000 164.000000 946684971152191162 -57.000000 -99.000000 168.000000 946684971172210693 Disabling: in_magn_x_en Disabling: in_magn_y_en Disabling: in_magn_z_en Disabling: in_timestamp_en I cannot currently scale these raw values to gauss. This is because of lack of documentation. I have sent a request for a datasheet to Asahi Kasei. The driver can optionally use a DRDY line IRQ to capture data, else it will sleep and poll. Cc: Samu Onkalo <samu.onkalo@intel.com> Cc: Sebastian Reichel <sre@kernel.org> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Tested-By: Sebastian Reichel <sre@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-06-30iio: magn: ak8975: deploy runtime and system PMLinus Walleij1-0/+72
This adds runtime PM support to the AK8975 driver. It solves two problems: - After reading the first value the chip was left in MODE_ONCE, meaning (presumably) it may be consuming more power. Now the runtime PM hooks kick in and set it to POWER_DOWN. - Regulators were simply enabled and left on, making it impossible to turn the power consuming regulators off because of the increased refcount. We now disable the regulators at autosuspend. - We also handle system suspend: by using pm_runtime_force_suspend() and pm_runtime_force_resume() from the system PM sleep hooks, the runtime PM code is managing the power also for this case. It is currently not completely optimal: when the system resumes the AK8975 goes into active mode even if noone is going to use it: currently the force calls need to be paired, but the runtime PM people are working on making it possible to leave devices runtime suspended when coming back from sleep. Inspired by my work on the BH1780 light sensor driver. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-06-30iio: magn: ak8975: make sure to power down at remove()Linus Walleij1-0/+1
The code was not powering the magnetometer down properly at remove(): just cutting the regulators without first setting the device in power off mode. Fix this. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-06-30iio: magn: ak8975: allow a delay after enabling regulatorsLinus Walleij1-0/+6
The datasheet actually specifies that we need to wait atleast 500us after powering on the device before trying to set mode. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-06-30iio: magn: ak8975: refactor regulator handlersLinus Walleij1-25/+18
Move the regulator_get() calls directly into the probe() function, keep only the power_on()/power_off() functions to flick the regulators on/off. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-06-30iio: magn: ak8975: add Vid regulatorLinus Walleij1-0/+15
The AK8975 has two power sources: Vdd (analog voltage supply) and Vid (digital voltage supply). Optionally also obtain the Vid supply regulator and enable it. If an error occurs when enabling one of the regulators: bail out. Cc: Gregor Boirie <gregor.boirie@parrot.com> Cc: Richard Leitner <dev@g0hl1n.net> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-06-30iio: magn: ak8975: fix regulator usageLinus Walleij1-9/+7
IS_ERR_OR_NULL() should never be used with regulators because a NULL pointer may be a perfectly valid dummy regulator We should always succeed to fetch and enable a regulator, but it may be a dummy. That is fine, so bail out for any real errors or probe deferrals Include the error code in the warning print so we know what kind of problem we're dealing with (for example it is nice to see if it is a probe deferral). As we will bail out of probe if the regulator is erroneous, just issue regulator_disable() on the poweroff path: it will succeed. Cc: Mark Brown <broonie@kernel.org> Cc: Lars-Peter Clausen Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-06-30iio:core: timestamping clock selection supportGregor Boirie3-3/+4
Adds a new per-device sysfs attribute "current_timestamp_clock" to allow userspace to select a particular POSIX clock for buffered samples and events timestamping. Following clocks, as listed in clock_gettime(2), are supported: CLOCK_REALTIME, CLOCK_MONOTONIC, CLOCK_MONOTONIC_RAW, CLOCK_REALTIME_COARSE, CLOCK_MONOTONIC_COARSE, CLOCK_BOOTTIME and CLOCK_TAI. Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Acked-by: Sanchayan Maity <maitysanchayan@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-06-20Merge 4.7-rc4 into staging-nextGreg Kroah-Hartman2-1/+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>
2016-06-09Merge tag 'iio-for-4.8a' of ↵Greg Kroah-Hartman5-12/+28
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: First round of IIO new device support, features and cleanups for the 4.8 cycle. New device support * ads1015 - add ads1115 support * bma220 accelerometer - new driver - triggered buffer support. * bmc150 - add bmm150 support. * bmp280 - bme280 support with addition of humidity channel. * max5487 potentiometer - new driver * MMA7660FC accelerometer. - New driver * st-pressure - support for the lps22hb * loop trigger. - This one is *nasty* but we have real applications (parrot drones) where it is useful. The trigger basically spins as hard as it can firing off a new trigger each time all triggered devices come back to say they are done. It doesn't hang a machine even when doing it on a dummy driver. A lot nicer than having this implemented within lots of device drivers anyway. Core stuff * Add support to create IIO devices via configfs (similar to we did for triggers a while back) + docs. * New channel types - IIO_ELECTRICAL_CONDUCTIVITY * Couple of MAINTAINERS patches to list the device tree bindings. * Make trigger ops structure non optional (comment fix). It hasn't been for an awful long time, but that's not what the description said. New features * ak8975 - support adapters that are limited to byte data only by allowing the emulated block read i2c function that was recently introduced. * atlas-ph - support atlas-ec (electrical conductivity sensor) * bmi160 - add available frequency and scale attributes to make the driver more user friendly (and avoid having to read the datasheet to know what will work). * dummy - move creation to configfs interface. It's not real hardware so we are not that worried about the ABI breakage ;) * mma8452 - oversampling ration support * nau7802 - expose available gains to make life easier for userspace. * st-sensors - allow use of emulation for SMBus block reads as all the st parts support it. * ti-ads1015 - list datasheet names to allow their use by inkernel consumers. * Various module alias additions to help auto probing. Drop one redundant one as well. Cleanups * ad7266, ad7476, ad7887, ad7923, ad799x - use direct mode claim function rather than open coding it during sensor read (prevents switching on buffers mid read). * ad7793, ad7791 - use direct mode claim to prevent frequency changes when buffers running. * afe440x - These are ABI breaking but the driver requires custom userspace code to do anything useful anyway and that is still being written and under control of TI. Ultimately we may have other libraries to do pulse oximetry with these devices but we aren't aware of any yet. - kernel-doc format fixes - drop ifdef fun around of_match_ptr - it's not worth the mess to save a tiny amount of space. - drop some unnecessary register initializations. - drop the weird locked gain modes as they gain us nothing (can just set all gains separately). - remove handling of offset attributes seeing as no channels actually have them (oops) - Drop the LED3 input channel as it's an alias for ALED2. - *big one* remove channel names - an experiment that turned out to not make sense - see patch for details. - use regmap fields to clean up code. - tie the tia gain stages to appropriate channels in the ABI as that is what they really effect. Same with the LED currents. - cleanout some unused defines and fix a missnamed one. * atlas-ph - reorganise to allow support of other similar parts. * bmc150 - document supported chips in kconfig help. * jsa1212 - drop an unneeded i2c functionality check for functionality the driver doesn't use. * mxs-lradc - simply touch screen registration code. - remove the touch screen unregister as all devm based now. - disable only those channels that are masked in hardware stop (others are already dealt with elsewhere) * st-sensors - unexport st_sensors_get_buffer_element as nothing outside the st-sensors core driver uses it. - fix handling of failure to start up regulators. * tpl0102 - drop an i2c functionality test for features that aren't needed. * ti-am335x - use variable name rather than type in sizeof for clarity. - use SIMPLE_DEV_PM_OPS helper macro to tidy up a bit. Tools * Add install / uninstall to makefile. Someone cares, so presumably some people will find it useful! * generic_buffer - rename to iio_generic_buffer to line up with other tools. - handle cleanup when receiving signals - Add a --device-num option and a --trigger-num option rather than relying on naming which doesn't work if you have two of the same part.
2016-06-07Merge tag 'iio-fixes-for-4.7a' of ↵Greg Kroah-Hartman2-1/+2
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus Jonathan writes: First round of iio fixes for the 4.7 cycle. A slightly bumper set due to travel delaying the pull request and a fair few issues with the recent merge window patches. Patches all over the place. The st-sensors one is probably the most involved, but definitly solves the issues seen. Note there are some other issues around that handler (and the fact that a lot of boards tie a level interrupt chip to an edge interrupt only irq chip). These are not regressions however, so will turn up the slow route. * core - iio_trigger_attach_pollfunc had some really badly wrong error handling. Another nasty triggered whilst chasing down issues with the st sensors rework below. * ad5592r - fix an off by one error when allocating channels. * am2315 - a stray mutex unlock before we ever take the lock. * apds9960 - missing a parent in the driver model (which should be the i2c device). Result is it doesn't turn up under /sys/bus/i2c/devices which some userspace code uses for repeatable device identification. * as3935 - ABI usage bug which meant a processed value was reported as raw. Now reporting scale as well to ensure userspace has the info it needs. - Don't return processed value via the buffer - it doesn't conform to the ABI and will overflow in some cases. - Fix a wrongly sized buffer which would overflow trashing part of the stack. Also move it onto the heap as part of the fix. * bh1780 - a missing return after write in debugfs lead to an incorrect read and a null pointer dereference. - dereferencing the wrong pointer in suspend and resume leading to unpredictable results. - assign a static name to avoid accidentally ending up with no name if loaded via device tree. * bmi160 - output data rate for the accelerometer was incorrectly reported. Fix it. - writing the output data rate was also wrong due to reverse parameters. * bmp280 - error message for wrong chip ID gave the wrong expected value. * hdc100x - mask for writing the integration time was wrong allowin g us to get 'stuck' in a particular value with no way back. - temperature reported in celsius rather than millicelsius as per the ABI. - Get rid of some incorrect data shifting which lead to readings being rather incorrect. * max44000 - drop scale attribute for proximity as it is an unscaled value (depends on what is in range rather than anything knowable at the detector). * st-pressure - ABI compliance fixes - units were wrong. * st-sensors - We introduced some nasty issues with the recent switch over to a a somewhat threaded handler in that we broke using a software trigger with these devices. Now do it properly. It's a larger patch than ideal for a fix, but the logic is straight forward. - Make sure the trigger is initialized before requesting the interrupt. This matters now the interrupt can be shared. Before it was ugly and wrong but short of flakey hardware could not be triggered. - Hammer down the dataready pin at boot - otherwise with really unlucky timing things could get interestingly wedged requiring a hard power down of the chip.
2016-05-29iio: st_sensors: switch to a threaded interruptLinus Walleij2-1/+2
commit 98ad8b41f58dff6b30713d7f09ae3834b8df7ded ("iio: st_sensors: verify interrupt event to status") caused a regression when reading ST sensors from a HRTimer trigger rather than the intrinsic interrupts: the HRTimer may trigger faster than the sensor provides new values, and as the check against new values available as a cause of the interrupt trigger was done in the poll function, this would bail out of the HRTimer interrupt with IRQ_NONE. So clearly we need to only check the new values available from the proper interrupt handler and not from the poll function, which should rather just read the raw values from the registers, put them into the buffer and be happy. To achieve this: switch the ST Sensors over to using a true threaded interrupt handler. In the interrupt thread, check if new values are available, else yield to the (potential) next device on the same interrupt line to check the registers. If the interrupt was ours, proceed to poll the values. Instead of relying on iio_trigger_generic_data_rdy_poll() as a top half to wake up the thread that polls the sensor for new data, have the thread call iio_trigger_poll_chained() after determining that is is the proper source of the interrupt. This is modelled on drivers/iio/accel/mma8452.c which is already using a properly threaded interrupt handler. In order to get the same precision in timestamps as previously, where samples would be timestamped in the poll function pf->timestamp when calling iio_trigger_generic_data_rdy_poll() we introduce a local timestamp in the sensor data, set it in the top half (fastpath) of the interrupt handler and provide that to the core when calling iio_push_to_buffers_with_timestamp(). Additionally: if the active scanmask is not set for the sensor no IRQs should be enabled and we need to bail out with IRQ_NONE. This can happen if spurious IRQs fire when installing the threaded interrupt handler. Tested with hard interrupt triggers on LIS331DL, then also tested with hrtimers on the same sensor by creating a 75Hz HRTimer and using it to poll the sensor. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Cc: Giuseppe Barba <giuseppe.barba@st.com> Cc: Denis Ciocca <denis.ciocca@st.com> Reported-by: Crestez Dan Leonard <cdleonard@gmail.com> Tested-by: Crestez Dan Leonard <cdleonard@gmail.com> Tested-by: Jonathan Cameron <jic23@kernel.org> Fixes: 97865fe41322 ("iio: st_sensors: verify interrupt event to status") Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-05-29iio: magnetometer: bmc150: Document Bosch supported chipsDaniel Baluta1-0/+2
bmc150 driver supports also BMC156 and BMM150 chips. Signed-off-by: Daniel Baluta <daniel.baluta@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-05-29iio:st_sensors: fix power regulator usageGregor Boirie1-4/+8
Ensure failure to enable power regulators is properly handled. Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-05-21iio: magn: Add support for BMM150 magnetometerDaniel Baluta2-0/+6
BMM150 is register compatible with magnetometer part of BMC156. Datasheet is at: http://www.mouser.com/ds/2/783/BST-BMM150-DS001-01-786480.pdf Signed-off-by: Daniel Baluta <daniel.baluta@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-05-09Merge 4.6-rc7 into staging-nextGreg Kroah-Hartman1-3/+3
This fixes some merge issues with some iio drivers that were found in linux-next. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-01iio: ak8975: Support adapters limited to BYTE_DATACrestez Dan Leonard1-8/+12
The device has simple 8-bit registers but the driver incorrectly uses block or word reads without checking functionality bits. Fix by using i2c_smbus_read_i2c_block_data_or_emulated instead of i2c_smbus_read_i2c_block_data or i2c_smbus_read_word_data. This will check functionality bits and use the fastest available transfer method. Signed-off-by: Crestez Dan Leonard <leonard.crestez@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-04-26Merge tag 'iio-for-4.7b' of ↵Greg Kroah-Hartman8-127/+389
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-testing Jonathan writes: 2nd set of new device support, features and cleanup for IIO in the 4.7 cycle. Bit of a bumper set for new drivers but plenty of other stuff here as well! New device support * ad5592R ADC/DAC - new driver supporting ad5592r and ad5593r combined ADC/DAC and gpio chips. * Aosong am2315 relative humidity - new driver with triggered buffer support in follow up patch. * bmi160 imu - new driver * bmp280 - bmp180 support - note there is support in the misc/bmp085 driver. Intent is to remove that driver long term. * invensense mpu6050 - cleanup leading to explicit support of mpu9150 with a good few cleanups along the way. * Hope RF hp03 pressure and temperature sensor. - new driver * maxim DS1803 potentiometer - new driver * maxim max44000 light and proximity sensor - new driver built in a series of steps to support pretty much everything. * ROHM BH1780 light sensor - new driver. There is an existing driver in misc that this is pretty much intended to replace. The discussion on whether to support the non standard interface of that driver is some way is continuing. * st-gyro - lsm9ds0-gyro. The accel/magn side of this will take a while longer as extensions to the st library are needed for cases where two types of sensor share a single i2c address. * ti-adc081c - support the adc101c and adc121c * Vishay VEML6070 UV sensor - new driver. New features * core - devm_ APIs for channel_get and channel_get_all. The first user of these is the generic ADC based thermal driver. As it is going through the thermal tree these will be picked up as a patch to that next cycle as that is how the author preferred to do it. - mounting matrix support. This new core support allows devices to provide to userspace (typically from the device tree) allowing compensation for how the sensor is mounted on the device. First examples are on UAVs but it has a more mundane use on typical phone where the chip may be on the front or the back of the circuit board and soldered at any angle. Includes support for this ABI in ak8975 (which has an older interface, now deprecated) and mpu6050. * tools - add a -a option to enable all available channels in generic_buffer sample. Makes it somewhat easier to use. * adis library and drivers - support manual self test flag clearing. This has technically been broken for a very long time - result is an offset on readings as the applied field is on all the time. * ak8975 - triggered buffer support * bmc150 - spi support (including splitting the driver into core and i2c parts) * bmp280 - oversampling support. * dht11 - improved logging - useful to debug timing issues on this quirky device. * st-sensors - read each channel invidivually as not all support the optimization of reading in bulk. This is technically a fix, but will need to be backported if desired. - support open drain and shared interrupts. * ti-adc081c - triggered buffer support. Cleanups * inkern - white space fix. * ad7606 - use the iio_device_claim_direct_mode call rather than open coding equiv. * ad799x - white space fix. * ad9523 - unsigned -> unsigned int * apds9660 - brace location tidying up. - silence an uninitialized variable warning. * ak8975 - else and brace on same line fix. * at91_adc - white space fixes. * bmc150 - use regmap stored copy of the device pointer rather than having an additional copy. * bmg160 - use regmap stored copy of the device pointer rather than having an additional copy. * hid-sensors - white space fixes. * mcp3422 - white space fix. * mma7455 - use regmap to retrieve the device struct rather than carrying another copy in the private data. * ms_sensors - white space fix. * mxs-lradc - move current bindings out of staging - some will be shortly deprecated but the reality is that we have device trees out there using them so they will need to be supported for some time. They accidentally got left behind when the driver graduated from staging. - white space cleanup. - set INPUT_PROP_DIRECT. - move ts config into a better function. - move the STMP reset out of the ADC init. * vf610_adc - case label indenting fix.
2016-04-23iio:ak8975: add mounting matrix supportGregor Boirie1-4/+30
Expose a rotation matrix to indicate userspace the chip orientation with respect to the overall hardware system. Matrix is retrieved from "in_mount_matrix". It is declared into ak8975 DTS entry as a "mount-matrix" property. Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-04-19iio: st_sensors: verify interrupt event to statusLinus Walleij1-0/+1
This makes all ST sensor drivers check that they actually have new data available for the requested channel(s) before claiming an IRQ, by reading the status register (which is conveniently the same for all ST sensors) and check that the channel has new data before proceeding to read it and fill the buffer. This way sensors can share an interrupt line: it can be flaged as shared and then the sensor that did not fire will return NO_IRQ, and the sensor that fired will handle the IRQ and return IRQ_HANDLED. Cc: Giuseppe Barba <giuseppe.barba@st.com> Cc: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-04-18iio: magn: bmc150: Introduce SPI supportDaniel Baluta3-0/+85
Signed-off-by: Daniel Baluta <daniel.baluta@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-04-18iio: magn: Split bmc150 driver in common/i2c partsDaniel Baluta5-99/+163
This is useful for easily adding SPI support in later patches. Now bmc150_magn exports core functions to be used by I2C/SPI drivers instances. For the moment only I2C driver is supported. Signed-off-by: Daniel Baluta <daniel.baluta@intel.com> Acked-by: Irina Tirdea <irina.tirdea@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-04-17iio: ak8975: fix maybe-uninitialized warningRichard Leitner1-1/+1
If i2c_device_id *id is NULL and acpi_match_device returns NULL too, then chipset may be unitialized when accessing &ak_def_array[chipset] in ak8975_probe. Therefore initialize chipset to AK_MAX_TYPE, which will return an error when not changed. This patch fixes the following maybe-uninitialized warning: drivers/iio/magnetometer/ak8975.c: In function ‘ak8975_probe’: drivers/iio/magnetometer/ak8975.c:788:14: warning: ‘chipset’ may be used uninitialized in this function [-Wmaybe-uninitialized] data->def = &ak_def_array[chipset]; Signed-off-by: Richard Leitner <dev@g0hl1n.net> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-04-17iio: ak8975: Fix NULL pointer exception on early interruptKrzysztof Kozlowski1-2/+2
In certain probe conditions the interrupt came right after registering the handler causing a NULL pointer exception because of uninitialized waitqueue: $ udevadm trigger i2c-gpio i2c-gpio-1: using pins 143 (SDA) and 144 (SCL) i2c-gpio i2c-gpio-3: using pins 53 (SDA) and 52 (SCL) Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = e8b38000 [00000000] *pgd=00000000 Internal error: Oops: 5 [#1] SMP ARM Modules linked in: snd_soc_i2s(+) i2c_gpio(+) snd_soc_idma snd_soc_s3c_dma snd_soc_core snd_pcm_dmaengine snd_pcm snd_timer snd soundcore ac97_bus spi_s3c64xx pwm_samsung dwc2 exynos_adc phy_exynos_usb2 exynosdrm exynos_rng rng_core rtc_s3c CPU: 0 PID: 717 Comm: data-provider-m Not tainted 4.6.0-rc1-next-20160401-00011-g1b8d87473b9e-dirty #101 Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) (...) (__wake_up_common) from [<c0379624>] (__wake_up+0x38/0x4c) (__wake_up) from [<c0a41d30>] (ak8975_irq_handler+0x28/0x30) (ak8975_irq_handler) from [<c0386720>] (handle_irq_event_percpu+0x88/0x140) (handle_irq_event_percpu) from [<c038681c>] (handle_irq_event+0x44/0x68) (handle_irq_event) from [<c0389c40>] (handle_edge_irq+0xf0/0x19c) (handle_edge_irq) from [<c0385e04>] (generic_handle_irq+0x24/0x34) (generic_handle_irq) from [<c05ee360>] (exynos_eint_gpio_irq+0x50/0x68) (exynos_eint_gpio_irq) from [<c0386720>] (handle_irq_event_percpu+0x88/0x140) (handle_irq_event_percpu) from [<c038681c>] (handle_irq_event+0x44/0x68) (handle_irq_event) from [<c0389a70>] (handle_fasteoi_irq+0xb4/0x194) (handle_fasteoi_irq) from [<c0385e04>] (generic_handle_irq+0x24/0x34) (generic_handle_irq) from [<c03860b4>] (__handle_domain_irq+0x5c/0xb4) (__handle_domain_irq) from [<c0301774>] (gic_handle_irq+0x54/0x94) (gic_handle_irq) from [<c030c910>] (__irq_usr+0x50/0x80) The bug was reproduced on exynos4412-trats2 (with a max77693 device also using i2c-gpio) after building max77693 as a module. Cc: <stable@vger.kernel.org> Fixes: 94a6d5cf7caa ("iio:ak8975 Implement data ready interrupt handling") Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Tested-by: Gregor Boirie <gregor.boirie@parrot.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-04-16iio: magnetometer: ak8975: put else and brace at the same lineSlawomir Stepien1-2/+1
This fixes the error reported by checkpatch.pl: ERROR: else should follow close brace '}' Signed-off-by: Slawomir Stepien <sst@poczta.fm> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-04-11Merge 4.6-rc3 into staging-nextGreg Kroah-Hartman1-0/+1
This resolves a lot of merge issues with PAGE_CACHE_* changes, and an iio driver merge issue. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-10iio:magnetometer:ak8975: triggered buffer supportGregor Boirie2-25/+112
This will be used together with an external trigger (e.g hrtimer based software trigger). Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-04-03iio: st_magn: always define ST_MAGN_TRIGGER_SET_STATEArnd Bergmann1-0/+1
When CONFIG_IIO_TRIGGER is enabled but CONFIG_IIO_BUFFER is not, we get a build error in the st_magn driver: drivers/iio/magnetometer/st_magn_core.c:573:23: error: 'ST_MAGN_TRIGGER_SET_STATE' undeclared here (not in a function) .set_trigger_state = ST_MAGN_TRIGGER_SET_STATE, ^~~~~~~~~~~~~~~~~~~~~~~~~ Apparently, this ST_MAGN_TRIGGER_SET_STATE macro was meant to be set to NULL when the definition is not available because st_magn_buffer.c is not compiled, but the alternative definition was not included in the original patch. This adds it. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 74f5683f35fe ("iio: st_magn: Add irq trigger handling") Acked-by: Denis Ciocca <denis.ciocca@st.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-04-03iio: remove unused gpio consumer.h includeIrina Tirdea1-1/+0
GPIO handling code has been removed from the drivers (since this is now handled by the ACPI core) in commit 0f0796509c07 ("iio: remove gpio interrupt probing from drivers that use a single interrupt"). Remove the include for linux/gpio/consumer.h since it is no longer used. Signed-off-by: Irina Tirdea <irina.tirdea@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-03-20iio:magnetometer:ak8975: fix missing regulator_disableGregor Boirie1-18/+60
Ensure optional regulator is properly disabled when present. Fixes: 63d5d525cbbc ("iio:magnetometer:ak8975: power regulator support") Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-03-05iio:magnetometer:ak8975: power regulator supportGregor Boirie1-0/+16
Add support for an optional regulator which, if found into device-tree, will power on device at probing time. The regulator is declared into ak8975 DTS entry as a "vdd-supply" property. Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-03-05iio:magnetometer:ak8975: remove unused fieldGregor Boirie1-1/+0
Remove unused struct ak8975_data attrs field. Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-03-05iio:magnetometer:ak8975: fix uninitialized chipsetGregor Boirie1-1/+4
ak_def_array bounds are not properly checked in case of ACPI matching failure. GCC warns with the following message at line 799: ‘chipset’ may be used uninitialized in this function. Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-02-24iio: hmc5843: Move hmc5843 out of stagingCristina Moraru6-0/+991
This patch moves hmc5843 driver from staging/iio/magnetometer to iio/magnetometer, updates the corresponding Makefiles and moves the hmc5843* entries to the 'Industrial I/O support -> Magnetometer sensors' menu. Signed-off-by: Cristina Moraru <cristina.moraru09@gmail.com> Cc: Daniel Baluta <daniel.baluta@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-10iio: ak8975: constify ak_def structuresJulia Lawall1-2/+2
The ak_def structures are never modified, so declare them as const. Done with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-10iio: st_sensors: support active-low interruptsLinus Walleij1-0/+4
Most ST MEMS Sensors that support interrupts can also handle sending an active low interrupt, i.e. going from high to low on data ready (or other interrupt) and thus triggering on a falling edge to the interrupt controller. Set up logic to inspect the interrupt line we get for a sensor: if it is triggering on rising edge, leave everything alone, but if it triggers on falling edges, set up active low, and if unsupported configurations appear: warn with errors and reconfigure the interrupt to a rising edge, which all interrupt generating sensors support. Create a local header for st_sensors_core.h to share functions between the sensor core and the trigger setup code. Cc: Giuseppe Barba <giuseppe.barba@st.com> Cc: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-12-01Merge tag 'iio-for-4.5a' of ↵Greg Kroah-Hartman1-11/+9
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: First set of new device support, features and cleanups for IIO in the 4.5 cycle Usual mixed bag, but the big item perhaps in this series is the DMA buffer support added by Lars-Peter Clausen. It's been in the works for a long time and it will be interesting to see what hardware support shows up now that this is available. New core features + associate cleanup. * Add generic DMA buffer infrastructure * Add a DMAengine framework based buffer Also associated minor changes. - Set the device buffer watermark based on the minimum watermark for all attached buffers rather than just the 'primary' one. - iio_buffer_init - only set the watermark default if one hasn't already been provided. This allows simple support for devices with a fixed watermark. - read only attribute for watermark on fixed watermark devices. - add explicit buffer enable/disable callbacks to allow the buffer to do more than trivial actions when it is being turned on and off. * IIO_VAL_INT support in write_raw_get_fmt function. New device support * Freescale MMA7455/7456L accelerometers * Memsic MXC6255XC accelerometer * ST lis2dh12 accelerometer * TI ADS8688 ADC * TI Palamas (twl6035/7) gpadc New driver features * mma8452 - support either of the available interrupt pins to cope with the case where board layout has lead to a particular one being connected. Staging graduation * Dummy driver - this driver acts as both an example and a test device for those with out hardware to develop userspace code against. Cleanups and minor bits and bobs. * treewide - Sort out the ordering of iio_device_register/unregister vs runtime pm function calls so that it's all nice and consistent and not race prone. - Check sscanf return values. None of the cases will actually happen as the strings are supplied internally, but best to be consistent on this. * ad7780 - switch over to the gpio descriptor interface and remove the now unused platform data which gets rid of a header entirely. * ad7793 - drop a pointless else statement. * at91_adc - Swap kmalloc_array in for a kmalloc doing the same job. * dummy - get rid of some commented out lines that snuck in during the move of the driver. * lm3533-als - Print an error message on provision of an invalid resistance. * mcp320x - Add compatible strings with vendor prefix and deprecate those with no vendor prefix. * mxs-lradc - Use BIT macro in various places rather than shifted ones. * pa12203001 - Power off the chip if the registration fails. * pulsedlight-lidar-lite - add runtime PM support. * xilinx XADC - constify an iio_buffer_setup_ops structure.
2015-11-08iio: Reconcile operation order between iio_register/unregister and pm functionsAdriana Reus1-11/+9
At probe, runtime pm should be setup before registering the sysfs interface so that all the power attributes are accurate and functional when registering. Also, when removing the device we should unregister first to make sure that the interfaces that may result in wakeups are no longer available. Fix this behaviour for the following drivers: bmc150, bmg160, kmx61, kxcj-1013, mma9551, mma9553, rpr0521. Signed-off-by: Adriana Reus <adriana.reus@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-11-05Merge tag 'spi-v4.4' of ↵Linus Torvalds1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi updates from Mark Brown: "Quite a lot of activity in SPI this cycle, almost all of it in drivers with a few minor improvements and tweaks in the core. - Updates to pxa2xx to support Intel Broxton and multiple chip selects. - Support for big endian in the bcm63xx driver. - Multiple slave support for the mt8173 - New driver for the auxiliary SPI controller in bcm2835 SoCs. - Support for Layerscale SoCs in the Freescale DSPI driver" * tag 'spi-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (87 commits) spi: pxa2xx: Rework self-initiated platform data creation for non-ACPI spi: pxa2xx: Add support for Intel Broxton spi: pxa2xx: Detect number of enabled Intel LPSS SPI chip select signals spi: pxa2xx: Add output control for multiple Intel LPSS chip selects spi: pxa2xx: Use LPSS prefix for defines that are Intel LPSS specific spi: Add DSPI support for layerscape family spi: ti-qspi: improve ->remove() callback spi/spi-xilinx: Fix race condition on last word read spi: Drop owner assignment from spi_drivers spi: Add THIS_MODULE to spi_driver in SPI core spi: Setup the master controller driver before setting the chipselect spi: dw: replace magic constant by DW_SPI_DR spi: mediatek: mt8173 spi multiple devices support spi: mediatek: handle controller_data in mtk_spi_setup spi: mediatek: remove mtk_spi_config spi: mediatek: Update document devicetree bindings to support multiple devices spi: fix kernel-doc warnings about missing return desc in spi.c spi: fix kernel-doc warnings about missing return desc in spi.h spi: pxa2xx: Align a few defines spi: pxa2xx: Save other reg_cs_ctrl bits when configuring chip select ...
2015-10-28spi: Drop owner assignment from spi_driversAndrew F. Davis1-1/+0
An spi_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Andrew F. Davis <afd@ti.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
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