Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1579010

Re: [PATCH v1 0/2] iio: Add parent_trigger attribute to triggers

Show all headers | View raw

On 06/02/17 14:43, Benjamin Gaignard wrote:
> 2017-02-06 15:26 GMT+01:00 Lars-Peter Clausen <lars@metafoo.de>:
>> On 02/06/2017 03:21 PM, Benjamin Gaignard wrote:
>>> Thoses patches add parent_trigger attribute to IIO triggers.
>>> The goal is to allow triggers to use triggers like is this done for iio
>>> devices.
>>> With this patch it will be possible to chain triggers, for example
>>> stm32 triggers could be used as clock of an other triggers:
>>> echo "tim1_trgo" > trigger0/parent_trigger.
>>
>> Can you explain how this is different to assigning the parent_trigger
>> directly to the device?
>>
> 
> It is the same but done on trigger structure without need to have an iio device.
> 
> While writing stm32 trigger driver Jonathan explain me that I can't use an iio
> device without channel to chain my hardware blocks.
> Since my hardware allows to chain triggers, Jonathan suggest to create this
> parent_trigger attribute to ab able to link the triggers.
> 
I think Lars was looking for the more general explanation.  How does
one trigger drive another one?  What does that mean?

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v1 0/2] iio: Add parent_trigger attribute to triggers Benjamin Gaignard <benjamin.gaignard@linaro.org> - 2017-02-06 15:30 +0100
  Re: [PATCH v1 0/2] iio: Add parent_trigger attribute to triggers Lars-Peter Clausen <lars@metafoo.de> - 2017-02-06 15:30 +0100
    Re: [PATCH v1 0/2] iio: Add parent_trigger attribute to triggers Benjamin Gaignard <benjamin.gaignard@linaro.org> - 2017-02-06 15:50 +0100
      Re: [PATCH v1 0/2] iio: Add parent_trigger attribute to triggers Jonathan Cameron <jic23@kernel.org> - 2017-02-11 11:30 +0100
  [PATCH v1 2/2] iio: stm32 trigger: Implement validate_trigger function Benjamin Gaignard <benjamin.gaignard@linaro.org> - 2017-02-06 15:30 +0100
    Re: [PATCH v1 2/2] iio: stm32 trigger: Implement validate_trigger  function Jonathan Cameron <jic23@kernel.org> - 2017-02-11 12:20 +0100
  [PATCH v1 1/2] iio: Allow triggers to be used as parent of others triggers Benjamin Gaignard <benjamin.gaignard@linaro.org> - 2017-02-06 15:30 +0100
    Re: [PATCH v1 1/2] iio: Allow triggers to be used as parent of others  triggers Jonathan Cameron <jic23@kernel.org> - 2017-02-11 12:00 +0100

csiph-web