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path: root/drivers/iio/industrialio-core.c
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* iio: types: Added support for rotation from north usage attributesReyad Attiyat2014-07-201-0/+4
| | | | | | | | Added the rotation from north usage attributes to the iio modifier enum and to the iio modifier names array. Signed-off-by: Reyad Attiyat <reyad.attiyat@gmail.com> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Add TEMP_AMBIENT and TEMP_OBJECT channel modifiersPeter Meerwald2014-05-031-0/+2
| | | | | | | | useful for contactless temperature sensors to distinguish between the ambient temperature and the temperature of the object Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* IIO: core: Add quaternion modifierSrinivas Pandruvada2014-04-291-0/+1
| | | | | | | Added quaternion in the list of supported modifiers. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* IIO: core: Introduce read_raw_multiSrinivas Pandruvada2014-04-291-22/+43
| | | | | | | | | | | | | | This callback is introduced to overcome some limitations of existing read_raw callback. The functionality of both existing read_raw and read_raw_multi is similar, both are used to request values from the device. The current read_raw callback allows only two return values. The new read_raw_multi allows returning multiple values. Instead of passing just address of val and val2, it passes length and pointer to values. Depending on the type and length of passed buffer, iio client drivers can return multiple values. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio:core: Fix bug in length of event info_mask and catch unhandled bits set ↵Jonathan Cameron2014-03-161-0/+2
| | | | | | | | | | | | | | | | | | | | in masks. The unhandled bits case was highlighted by smatch: CHECK drivers/iio/industrialio-core.c drivers/iio/industrialio-core.c:719 iio_device_add_info_mask_type() error: buffer overflow 'iio_chan_info_postfix' 17 <= 31 CC [M] drivers/iio/industrialio-core.o CHECK drivers/iio/industrialio-event.c drivers/iio/industrialio-event.c:327 iio_device_add_event() error: buffer overflow 'iio_ev_info_text' 3 <= 3 The incorrect limit for the for_each_set_bit loop was noticed whilst fixing this other case. Note that as we only have 3 possible entries a the moment and the value was set to 4, the bug would not have any effect currently. It will bite fairly soon though, so best fix it now. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Dan Carpenter <dan.carpenter@oracle.com>
* iio: force snprintf for PAGE_SIZE bufsKees Cook2014-03-151-2/+2
| | | | | | | | | | This is a tiny preventative measure to make sure we can't write beyond PAGE_SIZE on the buffers being used in sysfs for iio. There is currently no way for this to happen, but the change makes this code more robust for the future. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Avoid unnecessary kasprintfLars-Peter Clausen2014-02-181-26/+13
| | | | | | | | | | | | | | | | | | | name_format already contains the final name and no format characters. So the code basically reads: dev_attr->attr.name = kstrdup(GFP_KERNEL, name_format); if (dev_attr->attr.name == NULL) ... kfree(name_format); Which means we can save one alloc and free pair per attribute name if we directly assign name_format to dev_attr->attr.name. The patch also renames name_format to name to denote that this is indeed the final name and has no format characters in it. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Don't include extended name in shared attributesLars-Peter Clausen2014-02-181-1/+1
| | | | | | | | The extended name is channel specific and should not be included in shared attributes. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio get rid of unneccessary error_retHartmut Knaack2014-02-181-7/+3
| | | | | | | Get rid of obsolete uses of goto error_ret and some empty lines. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Add support for humidity sensorsHarald Geyer2013-12-031-0/+1
| | | | | | | | There are already humidity sensors in the hwmon subsystem, so we use their unit (milli percent) here as well. Signed-off-by: Harald Geyer <harald@ccbib.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: core: Move kernel doc to the right locationSachin Kamat2013-11-241-0/+42
| | | | | | | | | Documentation related to function should be placed above its implementation. Move it accordingly. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Cc: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: core: Implement devm_iio_device_{register,unregister}Sachin Kamat2013-11-241-0/+59
| | | | | | | | | | | | Add device managed devm_iio_device_{register,unregister}() to automatically unregister IIO drivers thus leading to simplified IIO driver code. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Cc: Lars-Peter Clausen <lars@metafoo.de> Tested-by: Lars-Peter Clausen <lars@metafoo.de> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: core: Add misssing bracesSachin Kamat2013-10-241-1/+1
| | | | | | | | Silences the following checkpatch warning: WARNING: sizeof *iio_attr should be sizeof(*iio_attr) Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: core: Use pr_err instead of printkSachin Kamat2013-10-241-6/+5
| | | | | | | Use of pr_err is preferred to printk. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Factor IIO value formating into its own functionLars-Peter Clausen2013-10-121-12/+26
| | | | | Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Add a helper to free a list of IIO device attributesLars-Peter Clausen2013-10-121-16/+18
| | | | | | | | | | | We have the same code to free a IIO device attribute list in multiple place. This patch adds a new helper function to take care of this and replaces the custom instances with a call to the helper function. Note that we do not need to call list_del() for each of the list items since we will never look at any of the list items nor the list itself again. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Wakeup poll and blocking reads when the device is unregisteredLars-Peter Clausen2013-10-121-0/+4
| | | | | | | | | Once the device has been unregistered there won't be any new data no matter how long a userspace application waits, so we might as well wake them up and let them know. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Return -ENODEV for file operations if the device has been unregisteredLars-Peter Clausen2013-10-121-0/+3
| | | | | | | | | If the IIO device has been unregistered return -ENODEV for any further file operations like read() and ioctl(). This avoids userspace being able to grab new references to the device. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Add reference counting for buffersLars-Peter Clausen2013-10-121-0/+3
| | | | | | | | | | | | | | | | | | | | | Since the buffer is accessed by userspace we can not just free the buffers memory once we are done with it in kernel space. There might still be open file descriptors and userspace still might be accessing the buffer. This patch adds support for reference counting to the IIO buffers. When a buffer is created and initialized its initial reference count is set to 1. Instead of freeing the memory of the buffer the buffer's _free() function will drop that reference again. But only after the last reference to the buffer has been dropped the buffer the buffer's memory will be freed. The IIO device will take a reference to its primary buffer. The patch adds a small helper function for this called iio_device_attach_buffer() which will get a reference to the buffer and assign the buffer to the IIO device. This function must be used instead of assigning the buffer to the device by hand. The reference is only dropped once the IIO device is freed and we can be sure that there are no more open file handles. A reference to a buffer will also be taken whenever the buffer is active to avoid the buffer being freed while data is still being send to it. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* Merge 3.12-rc4 into staging-nextGreg Kroah-Hartman2013-10-061-1/+1
|\ | | | | | | | | | | We want the staging fixes in this branch as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * iio: Remove debugfs entries in iio_device_unregister()Lars-Peter Clausen2013-09-301-1/+1
| | | | | | | | | | | | | | | | | | Remove the the debugfs entries in iio_device_unregister(). Otherwise the debugfs entries might still be accessible even though the device used in the debugfs callback has already been freed. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | Merge 3.12-rc2 into staging-next.Greg Kroah-Hartman2013-09-251-10/+21
|\ \ | |/ | | | | | | | | | | | | This resolves the merge problem with two iio drivers that Stephen Rothwell pointed out. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * iio: Prevent race between IIO chardev opening and IIO device freeLars-Peter Clausen2013-09-211-9/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Set the IIO device as the parent for the character device We need to make sure that the IIO device is not freed while the character device exists, otherwise the freeing of the IIO device might race against the file open callback. Do this by setting the character device's parent to the IIO device, this will cause the character device to grab a reference to the IIO device and only release it once the character device itself has been removed. Also move the registration of the character device before the registration of the IIO device to avoid the (rather theoretical case) that the IIO device is already freed again before we can add the character device and grab a reference to the IIO device. We also need to move the call to cdev_del() from iio_dev_release() to iio_device_unregister() (where it should have been in the first place anyway) to avoid a reference cycle. As iio_dev_release() is only called once all reference are dropped, but the character device holds a reference to the IIO device. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: fix: Keep a reference to the IIO device for open file descriptorsLars-Peter Clausen2013-09-211-0/+4
| | | | | | | | | | | | | | | | Make sure that the IIO device is not freed while we still have file descriptors for it. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| * iio: Stop sampling when the device is removedLars-Peter Clausen2013-09-211-1/+5
| | | | | | | | | | | | | | | | Make sure to stop sampling when the device is removed, otherwise it will continue to sample forever. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: add info_mask_[shared_by_dir/shared_by_all]Jonathan Cameron2013-09-151-0/+30
| | | | | | | | | | | | | | | | | | | | | | These two additional info_mask bitmaps should allow all 'standard' numeric attributes to be handled using the read_raw and write_raw callbacks. Whilst this should reduce code, the more important element is that this makes these values easily accessible to in kernel users of IIO devices. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
* | iio: refactor info mask and ext_info attribute creation.Jonathan Cameron2013-09-151-69/+80
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce an enum to specify whether the attribute is separate or shared. Factor out the bitmap handling for loop into a separate function. Tidy up error handling and add a NULL assignment to squish a false positive warning from GCC. Change ext_info shared type from boolean to enum and update in all drivers. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
* | iio: Add INT_TIME (integration time) channel info attributePeter Meerwald2013-09-141-0/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Integration time is in seconds; it controls the measurement time and influences the gain of a sensor. There are two typical ways that scaling is implemented in a device: 1) input amplifier, 2) reference to the ADC is changed. These both result in the accuracy of the ADC varying (by applying its sampling over a more relevant range). Integration time is a way of dealing with noise inherent in the analog sensor itself. In the case of a light sensor, a mixture of photon noise and device specific noise. Photon noise is dealt with by either improving the efficiency of the sensor, (more photons actually captured) which is not easily varied dynamically, or by integrating the measurement over a longer time period. Note that this can also be thought of as an averaging of a number of individual samples and is infact sometimes implemented this way. Altering integration time implies that the duration of a measurement changes, a fact the device's user may be interested in. Hence it makes sense to distinguish between integration time and simple scale. In some devices both types of control are present and whilst they will have similar effects on the amplitude of the reading, their effect on the noise of the measurements will differ considerably. Used by adjd_s311, tsl4531, tcs3472 The following drivers have similar controls (and could be adapted): * tsl2563 (integration time is controlled via CALIBSCALE among other things) * tsl2583 (has integration_time device_attr, but driver doesn't use channels yet) * tsl2x7x (has integration_time attr) Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Cc: Jon Brenner <jon.brenner@ams.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: core: Avoid double minus in sysfs outputOleksandr Kravchenko2013-08-031-2/+2
| | | | | | | | | | | This patch fixes the issue with double minus in output when reading channels from sysfs for IIO_VAL_INT_PLUS_MICRO and IIO_VAL_INT_PLUS_NANO cases. Until this patch if val and val2 both are negatives output string contains "--" before digits. It is result of "-%d..." in sprintf() format. Signed-off-by: Oleksandr Kravchenko <o.v.kravchenko@globallogic.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: core: implement devm_iio_device_alloc/devm_iio_device_freeGrygorii Strashko2013-08-031-0/+47
| | | | | | | | | | | | | | | | | Add a resource managed devm_iio_device_alloc()/devm_iio_device_free() to automatically clean up any allocations made by IIO drivers, thus leading to simplified IIO drivers code. In addition, this will allow IIO drivers to use other devm_*() API (like devm_request_irq) and don't care about the race between iio_device_free() and the release of resources by Device core during driver removing. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Oleksandr Kravchenko <o.v.kravchenko@globallogic.com> Tested-by: Oleksandr Kravchenko <o.v.kravchenko@globallogic.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio:core drop info_mask from struct iio_infoJonathan Cameron2013-03-171-17/+0
| | | | | | | | This has been replaced by the pair of masks info_mask_separate and info_mask_shared_by_type. Other variants may follow. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Acked-by: Lars-Peter Clausen <lars@metafoo.de>
* iio: Add broken out info_mask fields for shared_by_type and separateJonathan Cameron2013-03-171-0/+30
| | | | | | | | | This simplifies the code, removes an extensive layer of 'helper' macros and gives us twice as much room to play with in these masks before we have any need to be clever. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Acked-by: Lars-Peter Clausen <lars@metafoo.de>
* iio: Add OF supportGuenter Roeck2013-03-161-2/+6
| | | | | | | | Provide bindings and parse OF data during initialization. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Factor out fixed point number parsing into its own functionLars-Peter Clausen2012-11-201-35/+63
| | | | | | | | | Factor out the code for parsing fixed point numbers into its own function and make this function globally available. This allows us to reuse the code to parse fixed point numbers in individual IIO drivers. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Add pressure channel typeLars-Peter Clausen2012-11-201-0/+1
| | | | | | | | This patch adds support for a new IIO channel type for pressure measurements. This can for example be used for barometric pressure sensors. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* staging:iio: Add support for multiple buffersJonathan Cameron2012-11-101-0/+1
| | | | | | | | | Route all buffer writes through the demux. Addition or removal of a buffer results in tear down and setup of all the buffers for a given device. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Tested-by: srinivas pandruvada <srinivas.pandruvada@intel.com>
* iio: Accept a leading '+' sign when parsing fixed point numbersLars-Peter Clausen2012-11-021-0/+2
| | | | | | | If we encounter a leading '+' sign just skip over it. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Reject trailing garbage when parsing fixed point numbersLars-Peter Clausen2012-11-021-2/+0
| | | | | | | | | | | | When parsing a fixed point number IIO stops parsing the string once it has reached the last requested decimal place. This means that the remainder of the string is silently accepted regardless, of whether it is part of a valid number or not. This patch modifies the code to scan the whole string and only accept valid numbers. Since fract_mult is 0 after the last decimal place any digit that may follows won't affect the result. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Do not accept multiple '.' in fixed point numbersLars-Peter Clausen2012-11-021-1/+1
| | | | | | | | | Currently when parsing a fix-point number we silently skip any additional '.' found in the string. E.g. '1.2.3.4' gets parsed as '1.234'. This patch disallows this and returns an error if more than one '.' is encountered. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Add a logarithmic fractional value typeLars-Peter Clausen2012-10-191-0/+5
| | | | | | | | | | | For ADCs or DACs the denominator for fractional types often is a power of two. In this case we can use a shift operation instead of the rather expensive 64 bit division. This patch adds a new fractional type which expects the denominator to be specified as the log2 of the actual denominator. E.g. for ADCs and DACs this will usually be the number of significant bits. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Introduce a new fractional value typeLars-Peter Clausen2012-09-151-0/+6
| | | | | | | | | | | | | | | | | | | | | | | Currently IIO uses a decimal fixed point representations for real type numbers. This patch introduces a new representation for rational type numbers. The number will be expressed by specifying a numerator and denominator. For converting a raw value to a processed value multiply it by the numerator and divide it by the denominator. The reasoning for introducing this new type is that for a lot of devices the scale can be represented easily by a fractional number, but it is not possible to represent it as fixed point number without rounding. E.g. for a simple DAC the scale is often the reference voltage divided by the number of possible values (Usually 2**n_bits - 1). Each driver currently implements the conversion of this fraction to a fixed point number on its own. Also when it comes to the in-kernel interface this allows to directly use the fractional factors to convert a raw value to a processed value. This should on one hand require less instructions and on the other hand increase the precision. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: core: Add hysteresis in channel specsrinivas pandruvada2012-09-061-0/+1
| | | | | | | | Added hysteresis to the list of channel info enumeration, shared /separate bit defines and to postfix channel info strings. Signed-off-by: srinivas pandruvada <srinivas.pandruvada@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* IIO: Update email address for Jonathan Cameron.Jonathan Cameron2012-09-031-1/+1
| | | | Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: whitespace cleanup and removal of semicolon after functionsPeter Meerwald2012-09-031-1/+1
| | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: fix typosPeter Meerwald2012-09-031-1/+1
| | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* IIO channel type and modifiers for CCT and RGBC dataJon Brenner2012-07-101-0/+5
| | | | | | | | | | | | | | Add iio channel type and modifiers for Correlated Color Temperature (CCT) and RGBC (red/green/blue/clear) data. Add CCT and RGBC descriptions to documentation. Changes: Revised/condensed RGBC descriptions. Merge and trivial fix done by Jonathan Cameron. Signed-off-by: Jon Brenner <jbrenner@taosinc.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* IIO: Add a modifier for x^2+y^2+z^2Jonathan Cameron2012-06-301-0/+1
| | | | | | | There will probably be a number of such modifiers eventually but this one is used in the adis16240 accelerometer driver. Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* IIO: Add a modifier for sqrt(x^2+y^2)Jonathan Cameron2012-06-301-0/+1
| | | | | | | There will probably be a number of such modifiers eventually but this one is used in the adis16204 accelerometer driver. Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* Merge branch 'staging-linus' into staging-nextGreg Kroah-Hartman2012-06-131-7/+9
|\ | | | | | | | | | | | | We need this for the pstore fixes that went into the staging-linus branch, so that things apply properly for the pstore/android code merge. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * iio: Fix potential use after freeLars-Peter Clausen2012-06-041-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is no guarantee that the last reference to the iio device has already been dropped when iio_device_free is called. This means that we can up calling iio_dev_release after iio_device_free which will lead to a use after free. As the general rule the struct containing the device should always be freed in the release callback. This is what this patch does, it moves freeing the iio device struct as well as releasing the idr reference to the release callback. To ensure that the device is not freed before calling iio_device_free the device_unregister call in iio_device_unregister is broken apart. iio_device_unregister will now only call device_del to remove the device from the system and iio_device_free will call put_device to drop the reference we obtained in iio_devce_alloc. We also have to take care that calling iio_device_free without having called iio_device_register still works (i.e. this can happen if something failed during device initialization). For this to work properly two minor changes were necessary: channel_attr_list needs to be initialized in iio_device_alloc and we have to check whether the chrdev has been registered before releasing it in iio_device_release. This change also brings iio_device_unregister and iio_device_free more in sync with iio_device_register and iio_device_alloc which call device_add and device_initialize respectively. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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