From: Fabrice Gasnier <fabrice.gasnier@st.com>
To: <jic23@kernel.org>, <linux@armlinux.org.uk>, <robh+dt@kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: <linux-iio@vger.kernel.org>, <mark.rutland@arm.com>,
<mcoquelin.stm32@gmail.com>, <alexandre.torgue@st.com>,
<lars@metafoo.de>, <knaack.h@gmx.de>, <pmeerw@pmeerw.net>,
<fabrice.gasnier@st.com>, <benjamin.gaignard@linaro.org>,
<benjamin.gaignard@st.com>
Subject: [PATCH v2 0/5] Add STM32H7 DAC driver
Date: Thu, 6 Apr 2017 18:11:51 +0200 [thread overview]
Message-ID: <1491495116-7209-1-git-send-email-fabrice.gasnier@st.com> (raw)
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_powerdown
echo 0 > out_voltage1_raw
echo 0 > out_voltage1_powerdown
cat out_voltage_powerdown_mode_available
Hi-Z enable
# configure timer trigger, and set triangle waveform with half
# amplitude and DC offset 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 > out_voltage2_wavetype
echo 2047 > out_voltage2_amplitude
echo 1024 > out_voltage2_offset
echo tim2_trgo > trigger/current_trigger
echo 1 > out_voltage2_powerdown
---
Changes in v2:
- Update dt binding, use 'reg' property to select channel
- Use 'powerdown' attribute instead of 'enable'
- Added set_trigger callback
- Use 'offset' attribute in waveform generation mode to add DC offset
- rework ABI for waveform generation mode
- Various typos, comments
Fabrice Gasnier (5):
dt-bindings: iio: stm32-dac: Add support for STM32 DAC
iio: dac: add support for stm32 DAC
iio: trigger: add set_trigger callback to notify device
iio: dac: stm32: add support for trigger events
iio: dac: stm32: add support for waveform generator
Documentation/ABI/testing/sysfs-bus-iio-dac-stm32 | 16 +
.../devicetree/bindings/iio/dac/st,stm32-dac.txt | 61 ++
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 | 631 +++++++++++++++++++++
drivers/iio/industrialio-trigger.c | 6 +
include/linux/iio/iio.h | 2 +
9 files changed, 979 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
next reply other threads:[~2017-04-06 16:13 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-06 16:11 Fabrice Gasnier [this message]
2017-04-06 16:11 ` [PATCH v2 1/5] dt-bindings: iio: stm32-dac: Add support for STM32 DAC Fabrice Gasnier
2017-04-06 16:11 ` [PATCH v2 2/5] iio: dac: add support for stm32 DAC Fabrice Gasnier
2017-04-09 8:39 ` Jonathan Cameron
2017-04-10 15:56 ` Fabrice Gasnier
2017-04-06 16:11 ` [PATCH v2 3/5] iio: trigger: add set_trigger callback to notify device Fabrice Gasnier
2017-04-09 8:45 ` Jonathan Cameron
2017-04-06 16:11 ` [PATCH v2 4/5] iio: dac: stm32: add support for trigger events Fabrice Gasnier
2017-04-09 9:04 ` Jonathan Cameron
2017-04-10 16:37 ` Fabrice Gasnier
2017-04-06 16:11 ` [PATCH v2 5/5] iio: dac: stm32: add support for waveform generator Fabrice Gasnier
2017-04-09 9:34 ` Jonathan Cameron
2017-04-10 16:43 ` Fabrice Gasnier
2017-04-14 15:28 ` Jonathan Cameron
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