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2012-11-19staging:iio: Move adis library out of stagingLars-Peter Clausen1-0/+186
Now that the adis library no longer depends on the sw_ring buffer implementation we can move it out of staging. While we are at it also sort the entries in the iio Kconfig and Makefile to be in alphabetical order. Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-11-19iio: Fix iio_buffer_register stub signatureLars-Peter Clausen1-1/+1
Match the iio_buffer_register stub signature up to the real function and make the second parameter const. This fixes a the following warnings if CONFIG_IIO_BUFFER is disabled: drivers/staging/iio/accel/adis16201_core.c: In function ‘adis16201_probe’: drivers/staging/iio/accel/adis16201_core.c:536: warning: passing argument 2 of ‘iio_buffer_register’ discards qualifiers from pointer target type drivers/staging/iio/accel/adis16203_core.c: In function ‘adis16203_probe’: drivers/staging/iio/accel/adis16203_core.c:468: warning: passing argument 2 of ‘iio_buffer_register’ discards qualifiers from pointer target type drivers/staging/iio/accel/adis16204_core.c: In function ‘adis16204_probe’: drivers/staging/iio/accel/adis16204_core.c:527: warning: passing argument 2 of ‘iio_buffer_register’ discards qualifiers from pointer target type drivers/staging/iio/accel/adis16209_core.c: In function ‘adis16209_probe’: drivers/staging/iio/accel/adis16209_core.c:542: warning: passing argument 2 of ‘iio_buffer_register’ discards qualifiers from pointer target type drivers/staging/iio/accel/adis16240_core.c: In function ‘adis16240_probe’: drivers/staging/iio/accel/adis16240_core.c:588: warning: passing argument 2 of ‘iio_buffer_register’ discards qualifiers from pointer target type Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-11-13IIO: fix build error in lp8788-charger.cGreg Kroah-Hartman1-0/+2
Turns out that consumer.h needs to include types.h on some platforms to build properly (like powerpc). Reported-by: Stephen Rothwell <[email protected]> Cc: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-11-10staging:iio: add a callback buffer for in kernel push interfaceJonathan Cameron1-0/+46
This callback buffer is meant to be opaque to users, but basically adds a very simple pass through buffer to which data may be pushed when it is inserted into the buffer list. Signed-off-by: Jonathan Cameron <[email protected]>
2012-11-10staging:iio:in kernel users: Add a data field for channel specific info.Jonathan Cameron2-0/+4
Used to allow information about a given channel mapping to be passed through from board files to the consumer drivers. Signed-off-by: Jonathan Cameron <[email protected]>
2012-11-10staging:iio: Add support for multiple buffersJonathan Cameron2-5/+21
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 <[email protected]> Tested-by: srinivas pandruvada <[email protected]>
2012-10-29Merge 3.7-rc3 into staging-nextGreg Kroah-Hartman1-0/+16
This resolves the conflict with: drivers/staging/comedi/drivers/amplc_dio200.c and syncs up the changes that happened in the staging directory for 3.7-rc3. Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-10-19iio: Add a logarithmic fractional value typeLars-Peter Clausen1-0/+1
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 <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-10-19iio: Add some helper macros for unit conversionLars-Peter Clausen1-0/+16
Some datasheets use a different unit to specify the channel scale than what IIO expects it to be. This patch adds two helper macros which allow to convert units commonly used in datasheets to IIO units: * acceleration: g -> meter / second**2 * angular velocity: degree (/ second) -> rad (/ second) This makes it much more convenient to specify and also easier to verify a channel's scale attribute. Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-09-17iio:inkern: Add function to read the processed valueLars-Peter Clausen2-0/+55
Add a function to read a processed value from a channel. The function will first attempt to read the IIO_CHAN_INFO_PROCESSED attribute. If that fails it will read the IIO_CHAN_INFO_RAW attribute and convert the result from a raw value to a processed value. The patch also introduces a function to convert raw value to a processed value and exports it, in case a user needs or wants to do the conversion by itself. Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-09-17iio: consumer.h: Fix kernel doc incosistencyLars-Peter Clausen1-2/+2
For the iio_read_channel_raw and iio_read_channel_scale the kerneldoc comment refers to an argument called "channel", while the argument is called "chan" in the function signature. This leads to the following warnings from kerneldoc: Warning(include/linux/iio/consumer.h:71): No description found for parameter 'chan' Warning(include/linux/iio/consumer.h:71): Excess function parameter 'channel' description in 'iio_read_channel_raw' Warning(include/linux/iio/consumer.h:109): No description found for parameter 'chan' Warning(include/linux/iio/consumer.h:109): Excess function parameter 'channel' description in 'iio_read_channel_scale' This patch fixes the warnings by naming them consistently. Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-09-15iio: Introduce a new fractional value typeLars-Peter Clausen1-0/+1
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 <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-09-08iio: Drop timestamp parameter from buffer store_to callbackLars-Peter Clausen1-4/+2
Drop timestamp parameter from buffer store_to callback and subsequently from iio_push_to_buffer. The timestamp parameter is unused and it seems likely that it will stay unused in the future, so it should be safe to remove it. Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-09-06iio: core: Add hysteresis in channel specsrinivas pandruvada1-0/+5
Added hysteresis to the list of channel info enumeration, shared /separate bit defines and to postfix channel info strings. Signed-off-by: srinivas pandruvada <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-09-03iio: whitespace cleanup and removal of semicolon after functionsPeter Meerwald2-8/+8
Signed-off-by: Peter Meerwald <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-09-03iio: fix typosPeter Meerwald1-3/+3
Signed-off-by: Peter Meerwald <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-09-03iio: document missing elementsPeter Meerwald2-2/+7
Signed-off-by: Peter Meerwald <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-08-27iio:trigger_consumer.h: Add missing includes and forward declarationsLars-Peter Clausen1-0/+6
Add includes and forward declarations for types used in this file. This avoids compile errors if the other files have not been included before. Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-08-27iio: Add missing include guards to headersLars-Peter Clausen3-0/+13
Add include guards to the IIO headers where they are missing. This avoids compile errors due to redefined types if a file is included more than once. Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-08-27iio:consumer.h: Fix include guardLars-Peter Clausen1-1/+1
The symbol name for the #ifndef and the #define of the include guard do not match and thus it becomes quite ineffective. Add the missing '_' to fix this. Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-08-27iio:adc: Add common code for ADI Sigma Delta devicesLars-Peter Clausen1-0/+173
Most devices from the Analog Devices Sigma Delta family use a similar scheme for communication with the device. This includes register access, as well as trigger handling. But each device sub-family has different features and different register layouts (some even have no registers at all) and thus it is impractical to try to support all of the devices by the same driver. This patch adds a common base library for Sigma Delta converter devices. It will be used by individual drivers. This code is mostly based on the three existing Sigma Delta drivers the AD7192, AD7780 and AD7793, but has been improved for more robustness and flexibility. Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-08-27iio: Introduce iio_device_{set,get}_drvdata()Lars-Peter Clausen1-0/+25
Introduce two new helper functions to attach a arbitrary pointer to a IIO device. This is useful to get access to external non-global data from within a IIO device callbacks where only the IIO device is available. Internally these functions use dev_{set,get}_drvdata() on the struct device embedded in the IIO device. Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-08-16iio: frequency: ADF4350: Fix potential reference div factor overflow.Michael Hennerich1-0/+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 <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-07-10IIO channel type and modifiers for CCT and RGBC dataJon Brenner1-0/+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 <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-07-09iio: Introduce iio_validate_scan_mask_onehotLars-Peter Clausen1-0/+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 <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-07-09iio: Add callback to check whether a scan mask is validLars-Peter Clausen1-0/+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 <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-07-07iio: cleanup buffer.h commentsPeter Meerwald1-7/+10
Signed-off-by: Peter Meerwald <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
2012-06-30IIO: Add a modifier for x^2+y^2+z^2Jonathan Cameron1-0/+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 <[email protected]>
2012-06-30IIO: Add a modifier for sqrt(x^2+y^2)Jonathan Cameron1-0/+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 <[email protected]>
2012-06-30iio: Rename _st_ functions to loose the bit that meant the staging version.Jonathan Cameron1-17/+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 <[email protected]>
2012-06-18iio: remove extra ; after function definitionPeter Meerwald1-1/+1
Signed-off-by: Peter Meerwald <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-18iio: correct documentation for IIO_CONST_ATTR_SAMP_FREQ_AVAIL, match name of ↵Peter Meerwald1-1/+1
#define Signed-off-by: Peter Meerwald <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-18iio: typo in iio_chan_spec.ext_info commentPeter Meerwald1-1/+1
Signed-off-by: Peter Meerwald <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-18iio: Add helper function for initializing triggered buffersLars-Peter Clausen1-0/+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 <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-15iio: iio/events.h typosPeter Meerwald1-3/+3
Signed-off-by: Peter Meerwald <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-15iio: iio/machine.h typoPeter Meerwald1-1/+1
Signed-off-by: Peter Meerwald <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-12iio: cleanup iio/iio.hPeter Meerwald1-18/+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 <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-12iio: mark struct iio_enum elements with @ in commentPeter Meerwald1-4/+4
Signed-off-by: Peter Meerwald <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-12iio: clarify channel and indexed in struct iio_chan_specPeter Meerwald1-4/+3
Signed-off-by: Peter Meerwald <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-12iio: fix typos in iio.hPeter Meerwald1-3/+3
v2: * "used in in-kernel" (Jonathan Cameron) Signed-off-by: Peter Meerwald <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-12iio: drop comment about 'real' channelsPeter Meerwald1-1/+0
Signed-off-by: Peter Meerwald <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-12iio: add mcp4725 I2C DAC driverPeter Meerwald1-0/+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 <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-05staging:iio: Move DAC drivers out of stagingLars-Peter Clausen4-0/+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 <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-05iio: Add helper functions for enum style channel attributesLars-Peter Clausen1-0/+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 <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-04iio: Add iio_device_get()Lars-Peter Clausen1-0/+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 <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-04iio: frequency: New driver for Analog Devices ADF4350/ADF4351 Wideband ↵Michael Hennerich1-0/+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 <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-06-04iio: frequency: New driver for AD9523 SPI Low Jitter Clock GeneratorMichael Hennerich1-0/+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 <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-05-14iio: Add dev_to_iio_dev() helper functionLars-Peter Clausen1-0/+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 <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-05-14iio: core: introduce IIO_CHAN_INFO_HARDWAREGAINMichael Hennerich1-0/+5
Signed-off-by: Michael Hennerich <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-05-14iio: core: introduce dB scle: IIO_VAL_INT_PLUS_MICRO_DBMichael Hennerich1-0/+1
Signed-off-by: Michael Hennerich <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
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