linux.git/drivers/iio, branch v4.2-rc1

Merge tag 'iio-for-v4.2c' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

2015-06-11T03:48:34+00:00

Jonathan writes:

Third round of new IIO drivers, cleanups and functionality for the 4.2 cycle.

Given Linus announced a 4.8rc coming up, hopefully time for one more
lot of IIO patches this cycle.  Some of these are actually
improvements / fixes for patches earlier in the cycle.

New device support
* st_accel driver - support devices with 8 bit channels.

Cleanup
* A general cleanup of the iio tools under /tools/ from Hartmut.
  I'm more than a little embarassed by how bad some of these were! Are well,
  much more refined and less bug prone now.
  These cover lots of stuff like unhandled error returns, memory leaks as
  well as general refactoring to tidy the code up.
* iio_simple_dummy - fix memory leaks in the init functions, drop some
  pointless error returns from functions that never generate errors and
  make the module parameter explicitly unsigned.
* More buffer handling reworks from Lars-Peter, this time targetting hardware
  buffers (a little used corner that looks likely to get more use in the near
  future). Specifically:
  - Always compute the masklength as inkernel buffer users may need it.
  - Add a means of labeling which buffer modes a given buffer implementation
    supports.
  - In the case of hardware buffers, require strict scan matching rather than
    matching to a superset.  Currently the demux is bypassed by these drivers
    (this may well not change for efficiency reasons) so allowing a superset
    of channels to be selected would otherwise lead to more data than requested
    confusing userspace.

Driver funcationality improvments
* mmc35240 - adds a compensation to the raw values as borrowed form Memsic's
  own input driver.
* mma8452
  - event support
  - event debouncing
  - high  pass filter configuration
  - triggers
* vf610 - allow conversion mode to be adjusted

Fixlets
* mmc35240
  - Off by one error that by coincidence had no real effect.
  - i2c_device_name should be lowercase.
  - Lack of null terminator at end of attributes array.
  - Avoid computing the fractional part of the magnetic field by moving
    the scaling into userspace where floating point is available to simplify
    the maths.
  - Use a smaller sleep before assuming the measurement is done.  This is
    safe and improves the possible polling rate.
  - Fix sensitivity on z-axis - datasheet disagrees with Memsic's releasedd
    code and the value used in the code seems to be correct.
* stk3310 - make a local variable signed to ensure error handling works.
* twl4030
  - fix calculation of the temperature sense current - bug unlikely
    to have ever been noticed as the difference is small.
  - Fix errors in descriptions.

iio: st_accel: support the LIS331DL sensor

2015-06-08T21:21:18+00:00

This adds support for the LIS331DL sensor version. This is
a simple 8bit-only accelerometer.

Signed-off-by: Linus Walleij 
Acked-by: Denis Ciocca 
Signed-off-by: Jonathan Cameron

Merge 4.1-rc7 into staging-testing

2015-06-08T17:34:44+00:00

We want the staging tree fixes in here too to help with testing and
merge issues.

Signed-off-by: Greg Kroah-Hartman

iio: st_accel: support 8bit channel data

2015-06-07T16:58:28+00:00

Some sensors like the LIS331DL only support 8bit data by a single
register per axis. These utilize the MSB byte. Make it possible
to register these apropriately.

A oneliner change is needed in the ST sensors core to handle 8bit
reads as this is the first supported 8bit sensor.

Signed-off-by: Linus Walleij 
Acked-by: Denis Ciocca 
Signed-off-by: Jonathan Cameron

iio: adc: vf610: implement configurable conversion modes

2015-06-07T16:53:25+00:00

Support configurable conversion mode through sysfs. So far, the
mode used was low-power, which is enabled by default now. Beside
that, the modes normal and high-speed are selectable as well.

Use the new device tree property which specifies the maximum ADC
conversion clock frequencies. Depending on the mode used, the
available resulting conversion frequency are calculated
dynamically.

Acked-by: Fugang Duan 
Signed-off-by: Stefan Agner 
Signed-off-by: Jonathan Cameron

iio: adc: twl4030_madc: Fix description of twl4030_madc_set_current_generator()

2015-06-07T16:25:55+00:00

The @chan parameter can be 0 or 1 and not a bit mask. Fix wrong description.

Signed-off-by: H. Nikolaus Schaller 
Signed-off-by: Marek Belisko 
Signed-off-by: Jonathan Cameron

iio: adc: twl4030_madc: Fix calculation of the temperature sense current

2015-06-07T16:24:44+00:00

The bit mask to read the setting of the constant current source
for measuring the NTC voltage was the wrong one. Since default
value is initialized to the lowest level (000 = 10uA) the difference
was probably never noticed in practice.

Signed-off-by: H. Nikolaus Schaller 
Signed-off-by: Marek Belisko 
Signed-off-by: Jonathan Cameron

iio: mma8452: Add support for interrupt driven triggers.

2015-06-07T16:20:36+00:00

Implement interrupt driven trigger for data ready.
This allows more efficient access to the sample data.

Signed-off-by: Martin Fuzzey 
Signed-off-by: Jonathan Cameron

iio: mma8452: Add highpass filter configuration.

2015-06-07T16:20:33+00:00

Allow the cutoff frequency of the high pass filter to be configured.

Signed-off-by: Martin Fuzzey 
Signed-off-by: Jonathan Cameron

iio: mma8452: Add support for transient event debouncing

2015-06-07T16:19:36+00:00

Allow the debouce counter for transient events to be configured
using the sysfs attribute events/in_accel_thresh_rising_period

Signed-off-by: Martin Fuzzey 
Signed-off-by: Jonathan Cameron