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Groups > linux.kernel > #1613926

[PATCH 0/4] Add STM32H7 DAC driver

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This patchset adds support for the STM32H7 DAC controller

It's a 12-bit, voltage output digital-to-analog converter. It has two
output channels, each with its own converter, trigger sources and
waveform generator.

Each channel can be used independently, so common resources are managed
in stm32-dac-core driver (e.g. clock, reset, regulator, registers).
One IIO device is instantiated per DAC output channel, in stm32-dac
driver, so each channel can have its own trigger.

Please find bellow basic examples, using this driver to:
- generate DC voltage output on channel1
- generate a triangle waveform on channel2

# set max DC voltage / enable / min DC voltage / disable on out1:
cd /sys/bus/iio/devices/iio\:device0
echo 4095 > out_voltage1_raw 
echo 1 > out_voltage1_en
echo 0 > out_voltage1_raw
echo 0 > out_voltage1_en

# configure timer trigger, and set triangle waveform with max
# amplitude on out2:
cd /sys/bus/iio/devices/trigger9
cat name
tim2_trgo
echo 10000 > sampling_frequency

cd /sys/bus/iio/devices/iio\:device1
echo triangle > wave
echo 11 > mamp
echo tim2_trgo > trigger/current_trigger
echo 1 > out_voltage2_en

Fabrice Gasnier (4):
  dt-bindings: iio: stm32-dac: Add support for STM32 DAC
  iio: dac: add support for stm32 DAC
  iio: dac: stm32: add support for trigger events
  iio: dac: stm32: add support for waveform generator

 Documentation/ABI/testing/sysfs-bus-iio-dac-stm32  |  32 ++
 .../devicetree/bindings/iio/dac/st,stm32-dac.txt   |  56 +++
 drivers/iio/dac/Kconfig                            |  18 +
 drivers/iio/dac/Makefile                           |   2 +
 drivers/iio/dac/stm32-dac-core.c                   | 180 +++++++
 drivers/iio/dac/stm32-dac-core.h                   |  63 +++
 drivers/iio/dac/stm32-dac.c                        | 538 +++++++++++++++++++++
 7 files changed, 889 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-dac-stm32
 create mode 100644 Documentation/devicetree/bindings/iio/dac/st,stm32-dac.txt
 create mode 100644 drivers/iio/dac/stm32-dac-core.c
 create mode 100644 drivers/iio/dac/stm32-dac-core.h
 create mode 100644 drivers/iio/dac/stm32-dac.c

-- 
1.9.1

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[PATCH 0/4] Add STM32H7 DAC driver Fabrice Gasnier <fabrice.gasnier@st.com> - 2017-03-31 13:50 +0200
  [PATCH 3/4] iio: dac: stm32: add support for trigger events Fabrice Gasnier <fabrice.gasnier@st.com> - 2017-03-31 13:50 +0200
    Re: [PATCH 3/4] iio: dac: stm32: add support for trigger events Jonathan Cameron <jic23@kernel.org> - 2017-04-02 13:50 +0200
      Re: [PATCH 3/4] iio: dac: stm32: add support for trigger events Jonathan Cameron <jic23@kernel.org> - 2017-04-02 14:30 +0200
        Re: [PATCH 3/4] iio: dac: stm32: add support for trigger events Fabrice Gasnier <fabrice.gasnier@st.com> - 2017-04-05 18:50 +0200
          Re: [PATCH 3/4] iio: dac: stm32: add support for trigger events Jonathan Cameron <jic23@kernel.org> - 2017-04-08 19:20 +0200
  [PATCH 1/4] dt-bindings: iio: stm32-dac: Add support for STM32 DAC Fabrice Gasnier <fabrice.gasnier@st.com> - 2017-03-31 13:50 +0200
    Re: [PATCH 1/4] dt-bindings: iio: stm32-dac: Add support for STM32  DAC Jonathan Cameron <jic23@kernel.org> - 2017-04-02 13:20 +0200
      Re: [PATCH 1/4] dt-bindings: iio: stm32-dac: Add support for STM32  DAC Fabrice Gasnier <fabrice.gasnier@st.com> - 2017-04-05 16:50 +0200
    Re: [PATCH 1/4] dt-bindings: iio: stm32-dac: Add support for STM32  DAC Rob Herring <robh@kernel.org> - 2017-04-03 18:50 +0200
      Re: [PATCH 1/4] dt-bindings: iio: stm32-dac: Add support for STM32  DAC Fabrice Gasnier <fabrice.gasnier@st.com> - 2017-04-05 16:50 +0200
  [PATCH 2/4] iio: dac: add support for stm32 DAC Fabrice Gasnier <fabrice.gasnier@st.com> - 2017-03-31 13:50 +0200
    Re: [PATCH 2/4] iio: dac: add support for stm32 DAC Peter Meerwald-Stadler <pmeerw@pmeerw.net> - 2017-04-01 14:40 +0200
      Re: [PATCH 2/4] iio: dac: add support for stm32 DAC Fabrice Gasnier <fabrice.gasnier@st.com> - 2017-04-05 17:00 +0200
    Re: [PATCH 2/4] iio: dac: add support for stm32 DAC Jonathan Cameron <jic23@kernel.org> - 2017-04-02 13:40 +0200
      Re: [PATCH 2/4] iio: dac: add support for stm32 DAC Fabrice Gasnier <fabrice.gasnier@st.com> - 2017-04-05 17:50 +0200
        Re: [PATCH 2/4] iio: dac: add support for stm32 DAC Jonathan Cameron <jic23@kernel.org> - 2017-04-08 19:20 +0200

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