iio: ABI: stm32-timer-trigger: Fuse unusual ABI into main doc.

We can't duplicate the description of sampling_frequency. This device
has some unusual requirements which we solved by giving a
samplin

iio: ABI: stm32-timer-trigger: Fuse unusual ABI into main doc.

We can't duplicate the description of sampling_frequency. This device
has some unusual requirements which we solved by giving a
sampling_frequency of 0 special meaning. As such add a note
about this unusual usage to the main documentation.

Whilst I don't particularly like this resolution, it is the best
I could come up with given earlier discussion on this topic.

Link: https://lore.kernel.org/linux-iio/[email protected]/
Signed-off-by: Jonathan Cameron <[email protected]>
Cc: Fabrice Gasnier <[email protected]>
Reviewed-by: Mauro Carvalho Chehab <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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docs: ABI: testing: iio: stm32: remove re-introduced unsupported ABI

Remove unsupported ABI that has been re-introduced due to a rebase hunk.
This ABI has been moved in the past in commit b299d00420

docs: ABI: testing: iio: stm32: remove re-introduced unsupported ABI

Remove unsupported ABI that has been re-introduced due to a rebase hunk.
This ABI has been moved in the past in commit b299d00420e2
("IIO: stm32: Remove quadrature related functions from trigger driver")

This also fixes a couple of warnings seen with:
./scripts/get_abi.pl validate 2>&1|grep iio

Fixes: 34433332841d ("docs: ABI: testing: make the files compatible with ReST output")
Acked-by: Jonathan Cameron <[email protected]>
Signed-off-by: Fabrice Gasnier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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docs: ABI: testing: make the files compatible with ReST output

Some files over there won't parse well by Sphinx.

Fix them.

Acked-by: Jonathan Cameron <[email protected]> # for IIO
Acked-

docs: ABI: testing: make the files compatible with ReST output

Some files over there won't parse well by Sphinx.

Fix them.

Acked-by: Jonathan Cameron <[email protected]> # for IIO
Acked-by: Fabrice Gasnier <[email protected]>
Acked-by: Jonathan Corbet <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Link: https://lore.kernel.org/r/58cf3c2d611e0197fb215652719ebd82ca2658db.1604042072.git.mchehab+huawei@kernel.org
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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IIO: stm32: Remove quadrature related functions from trigger driver

Quadrature feature is now hosted on it own framework.
Remove quadrature related code from stm32-trigger driver to avoid
code dupli

IIO: stm32: Remove quadrature related functions from trigger driver

Quadrature feature is now hosted on it own framework.
Remove quadrature related code from stm32-trigger driver to avoid
code duplication and simplify the ABI.

Signed-off-by: Benjamin Gaignard <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: make stm32 trigger driver use INDIO_HARDWARE_TRIGGERED mode

Add validate function to be use to use the correct trigger.
Add an attribute to configure device mode like for quadrature and
enable

iio: make stm32 trigger driver use INDIO_HARDWARE_TRIGGERED mode

Add validate function to be use to use the correct trigger.
Add an attribute to configure device mode like for quadrature and
enable modes

Signed-off-by: Benjamin Gaignard <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: stm32 trigger: Add support for TRGO2 triggers

Add support for TRGO2 trigger that can be found on STM32F7.
Add additional master modes supported by TRGO2.
Register additional "tim[1/8]_trgo2" tr

iio: stm32 trigger: Add support for TRGO2 triggers

Add support for TRGO2 trigger that can be found on STM32F7.
Add additional master modes supported by TRGO2.
Register additional "tim[1/8]_trgo2" triggers for timer1 & timer8.
Detect TRGO2 timer capability (master mode selection 2).

Signed-off-by: Fabrice Gasnier <[email protected]>
Acked-by: Benjamin Gaignard <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: stm32 trigger: Add counter enable modes

Device counting could be controlled by the level or the edges of
a trigger.
in_count0_enable_mode attibute allow to set the control mode.

Signed-off-by:

iio: stm32 trigger: Add counter enable modes

Device counting could be controlled by the level or the edges of
a trigger.
in_count0_enable_mode attibute allow to set the control mode.

Signed-off-by: Benjamin Gaignard <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: stm32 trigger: Add quadrature encoder device

One of the features of STM32 trigger hardware block is a quadrature
encoder that can counts up/down depending of the levels and edges
of the selecte

iio: stm32 trigger: Add quadrature encoder device

One of the features of STM32 trigger hardware block is a quadrature
encoder that can counts up/down depending of the levels and edges
of the selected external pins.

This patch allow to read/write the counter, get it direction,
set/get quadrature modes and get scale factor.

When counting up preset value is the limit of the counter.
When counting down the counter start from preset value down to 0.
This preset value could be set/get by using
/sys/bus/iio/devices/iio:deviceX/in_count0_preset attribute.

Signed-off-by: Benjamin Gaignard <[email protected]>
Reviewed-by: William Breathitt Gray <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: Add STM32 timer trigger driver

Timers IPs can be used to generate triggers for other IPs like
DAC or ADC.
Each trigger may result of timer internals signals like counter enable,
reset or edge,

iio: Add STM32 timer trigger driver

Timers IPs can be used to generate triggers for other IPs like
DAC or ADC.
Each trigger may result of timer internals signals like counter enable,
reset or edge, this configuration could be done through "master_mode"
device attribute.

Since triggers could be used by DAC or ADC their names are defined
in include/ nux/iio/timer/stm32-timer-trigger.h and is_stm32_iio_timer_trigger
function could be used to check if the trigger is valid or not.

"trgo" trigger have a "sampling_frequency" attribute which allow to configure
timer sampling frequency.

version 8:
- change kernel version from 4.10 to 4.11 in ABI documentation

version 7:
- remove all iio_device related code
- move driver into trigger directory

version 5:
- simplify tables of triggers
- only create an IIO device when needed

version 4:
- get triggers configuration from "reg" in DT
- add tables of triggers
- sampling frequency is enable/disable when writing in trigger
sampling_frequency attribute
- no more use of interruptions

version 3:
- change compatible to "st,stm32-timer-trigger"
- fix attributes access right
- use string instead of int for master_mode and slave_mode
- document device attributes in sysfs-bus-iio-timer-stm32

version 2:
- keep only one compatible
- use st,input-triggers-names and st,output-triggers-names
to know which triggers are accepted and/or create by the device

Signed-off-by: Benjamin Gaignard <[email protected]>
Acked-by: Jonathan Cameron <[email protected]>
Signed-off-by: Lee Jones <[email protected]>

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