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* iio: frequency: ADF4350: Fix potential reference div factor overflow.Michael Hennerich2012-08-161-0/+2
| | | | | | | | | | | | With small channel spacing values and high reference frequencies it is possible to exceed the range of the 10-bit counter. Workaround by checking the range and widening some constrains. We don't use the REG1_PHASE value in this case the datasheet recommends to set it to 1 if not used. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> 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: Introduce iio_validate_scan_mask_onehotLars-Peter Clausen2012-07-091-0/+3
| | | | | | | | | | Add a helper function for validating a scan mask for devices where exactly one channel must be selected during sampling. This is a common case among devices which have scan mask restrictions so it makes sense to provide this function in the core. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: Add callback to check whether a scan mask is validLars-Peter Clausen2012-07-091-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is useful for cases where the number of valid scan masks grows exponentially, but it is rather easy to check whether a mask is valid or not programmatically. An example of such a case is a device with multiple ADCs where each ADC has a upstream MUX, which allows to select from a number of physical channels. +-------+ +-------+ | | | | --- Channel 1 | ADC 1 |---| MUX 1 | --- ... | | | | --- Channel M +-------+ +-------+ . . . . . . . . . +-------+ +-------+ | | | | --- Channel M * N + 1 | ADC N |---| MUX N | --- ... | | | | --- Channel M * N + M +-------+ +-------+ The number of necessary scan masks for this case is (M+1)**N - 1, on the other hand it is easy to check whether subsets for each ADC of the scanmask have only one bit set. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: cleanup buffer.h commentsPeter Meerwald2012-07-071-7/+10
| | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> 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>
* iio: Rename _st_ functions to loose the bit that meant the staging version.Jonathan Cameron2012-06-301-17/+17
| | | | | | | | | These were originally introduced when the plan was to have parallel IIO cores in and out of staging with a slow move between them. Now we have reached the point where the whole core has moved, they need clearing up! Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: remove extra ; after function definitionPeter Meerwald2012-06-181-1/+1
| | | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: correct documentation for IIO_CONST_ATTR_SAMP_FREQ_AVAIL, match name of ↵Peter Meerwald2012-06-181-1/+1
| | | | | | | | #define Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: typo in iio_chan_spec.ext_info commentPeter Meerwald2012-06-181-1/+1
| | | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: Add helper function for initializing triggered buffersLars-Peter Clausen2012-06-181-0/+15
| | | | | | | | | | Add a helper function for executing the common tasks which are usually involved in setting up a simple software ringbuffer. It will allocate the buffer, allocate the pollfunc and register the buffer. 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>
* iio: iio/events.h typosPeter Meerwald2012-06-151-3/+3
| | | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: iio/machine.h typoPeter Meerwald2012-06-151-1/+1
| | | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: cleanup iio/iio.hPeter Meerwald2012-06-121-18/+18
| | | | | | | | | | indentation of parameter description, fix parameter name (@dev -> @indio_dev) in comments, IIO device info structure -> IIO device structure Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: mark struct iio_enum elements with @ in commentPeter Meerwald2012-06-121-4/+4
| | | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: clarify channel and indexed in struct iio_chan_specPeter Meerwald2012-06-121-4/+3
| | | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: fix typos in iio.hPeter Meerwald2012-06-121-3/+3
| | | | | | | | | v2: * "used in in-kernel" (Jonathan Cameron) Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: drop comment about 'real' channelsPeter Meerwald2012-06-121-1/+0
| | | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: add mcp4725 I2C DAC driverPeter Meerwald2012-06-121-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | v5: * fix warnings (Jonathan Cameron) v4: * remove unused indio_dev pointer in mcp4725_data (Jonathan Cameron) * use u16 instead of unsigned short in mcp4725_data (Jonathan Cameron) * #include mcp4725.h from linux/iio/dac/ v3: * move from staging to drivers/iio * switch to chan_spec * dev_get_drvdata() -> dev_to_iio_dev() * annotate probe() and remove() with __devinit and __devexit v2 (based on comments from Jonathan Cameron and Lars-Peter Clausen): * did NOT switch to chan_spec yet * rebase to staging-next tree, update iio header locations * dropped dac.h #include, not needed * strict_strtol() -> kstrtol() * call iio_device_unregister() in remove() * everything in one patch Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* staging:iio: Move DAC drivers out of stagingLars-Peter Clausen2012-06-054-0/+84
| | | | | | | | | | | | The IIO DAC drivers are in a reasonably good shape. They all make use of channel spec and non of them provides non-documented sysfs attributes. Code style should be OK as well, both checkpatch and coccicheck only report trivial issues. So lets move the whole folder out of staging. 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>
* iio: Add helper functions for enum style channel attributesLars-Peter Clausen2012-06-051-0/+64
| | | | | | | | | | | | | | | We often have the case were we do have a enum style channel attribute. These attributes have in common that they are a list of string values which usually map in a 1-to-1 fashion to integer values. This patch implements some common helper code for implementing enum style channel attributes using extended channel attributes. The helper functions take care of converting between the string and integer values, as well providing a function for "_available" attributes which list all available enum items. 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>
* iio: Add iio_device_get()Lars-Peter Clausen2012-06-041-0/+11
| | | | | | | | | | This patch add the iio_device_get() function, which increases the reference count of a iio device. The matching function to decrease the reference count - iio_device_put() - already exists. 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>
* iio: frequency: New driver for Analog Devices ADF4350/ADF4351 Wideband ↵Michael Hennerich2012-06-041-0/+126
| | | | | | | | | | | | | | | | | | | | | | | | | Synthesizers Changes since V1: Apply Jonathan's review feedback: Introduce and use IIO_ALTVOLTAGE. Fix up comments and documentation. Remove dead code. Reorder some code fragments. Add missing iio_device_free. Convert to new API. Fix-up out of staging includes. Removed pll_locked attribute. Changes since V2: Use module_spi_driver. adf4350_remove: move gpio_free after regulator. target patch to drivers/iio Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: frequency: New driver for AD9523 SPI Low Jitter Clock GeneratorMichael Hennerich2012-06-041-0/+195
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changes since V1: Apply Jonathan's review feedback: Revise device status attribute names, and split documentation into two sections. Add additional comments, and fix indention issues. Remove pointless zero initializations. Revise return value handling. Simplify some code sections. Split store_eeprom and sync handling into separate functions. Use strtobool where applicable. Document platform data structures using kernel-doc style. Use dev_to_iio_dev write_raw IIO_CHAN_INFO_FREQUENCY: Reject values <= 0 Make patch target drivers/iio Changes since V2: Use for_each_clear_bit() and __set_bit() where applicable. Add descriptive comment. Avoid temporary for struct regulator. spi_device_id name use ad9523-1, ad9523 will be added later. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: Add dev_to_iio_dev() helper functionLars-Peter Clausen2012-05-141-0/+11
| | | | | | | | | | | | | This patch adds a helper function for retriving a iio_dev struct from a device struct. Currently we open-code this in two different ways. One is using dev_get_drvdata on the device and the other is using container_of. The new helper function uses the container_of solution as it creates slightly smaller code and also will eventually free up the drvdata pointer for usage by invidual drivers. 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>
* iio: core: introduce IIO_CHAN_INFO_HARDWAREGAINMichael Hennerich2012-05-141-0/+5
| | | | | | Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: core: introduce dB scle: IIO_VAL_INT_PLUS_MICRO_DBMichael Hennerich2012-05-141-0/+1
| | | | | | Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: core: iio_chan_spec_ext_info: Add private handleMichael Hennerich2012-04-291-4/+7
| | | | | | | | | There is currently no user, but we might need it in future. So better add it now, before we have to convert drivers afterwards. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iio: core: Introduce IIO_ALTVOLTAGE and appropriate channel info elementsMichael Hennerich2012-04-292-0/+11
| | | | | | Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* staging:iio: Streamline API function namingLars-Peter Clausen2012-04-292-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we use two different naming schemes in the IIO API, iio_verb_object and iio_object_verb. E.g iio_device_register and iio_allocate_device. This patches renames instances of the later to the former. The patch also renames allocate to alloc as this seems to be the preferred form throughout the kernel. In particular the following renames are performed by the patch: iio_put_device -> iio_device_put iio_allocate_device -> iio_device_alloc iio_free_device -> iio_device_free iio_get_trigger -> iio_trigger_get iio_put_trigger -> iio_trigger_put iio_allocate_trigger -> iio_trigger_alloc iio_free_trigger -> iio_trigger_free The conversion was done with the following coccinelle patch with manual fixes to comments and documentation. <smpl> @@ @@ -iio_put_device +iio_device_put @@ @@ -iio_allocate_device +iio_device_alloc @@ @@ -iio_free_device +iio_device_free @@ @@ -iio_get_trigger +iio_trigger_get @@ @@ -iio_put_trigger +iio_trigger_put @@ @@ -iio_allocate_trigger +iio_trigger_alloc @@ @@ -iio_free_trigger +iio_trigger_free </smpl> 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>
* IIO: Move core headers to include/linux/iioJonathan Cameron2012-04-2511-0/+1262
Step 1 in moving the IIO core out of staging. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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