This patch implements the hardware triggers support and buffer management
for sama5d2.
The DT modifications ( [PATCH 1/3] ARM: dts: at91: sama5d2_xplained:
enable ADTRG pin) are for demonstration purposes of the feature,
setting the pinctrl for the ADC hw trigger pin,should go through
at91 maintainers.
I also increased the buffer size for the trigger name in the
generic_buffer application to cope with longer names and avoid
stack smashing problem.
This is in patch [PATCH 3/3] iio: tools: generic_buffer: increase trigger length

  Changes in v2:
 - Moved buffer allocation and freeing into the preenable and postdisable
   callbacks.
   We have a total of scan bytes that can vary a lot depending on each channel
   enabled at a certain point.
 - made the at91 trigger list part of state structure
 - made the iio trigger list preallocated in state structure
 - moved irq enabling/disabling into the try_reenable callback
 - on trigger disable must write disable registries as well
 - Modified trigger name length to 64

Eugen Hristev (3):
  ARM: dts: at91: sama5d2_xplained: enable ADTRG pin
  iio: adc: at91-sama5d2_adc: add hw trigger and buffer support
  iio: tools: generic_buffer: increase trigger length

 arch/arm/boot/dts/at91-sama5d2_xplained.dts |  16 +-
 drivers/iio/adc/at91-sama5d2_adc.c          | 231 +++++++++++++++++++++++++++-
 tools/iio/iio_utils.h                       |   2 +-
 3 files changed, 244 insertions(+), 5 deletions(-)

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2.7.4