Messages in this thread | | | From | Daniel Baluta <> | Date | Fri, 17 Feb 2017 18:23:41 +0200 | Subject | Re: [RFC 0/4] iio: trigger: Add OF support and GPIO based trigger |
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On Fri, Feb 17, 2017 at 6:03 PM, Fabrice Gasnier <fabrice.gasnier@st.com> wrote: > Hi, > > I send this as an RFC, as I'm digging to try to get as generic > as possible GPIO based trigger support, as discussed earlier in > other patchset "Add EXTI GPIO trigger support to STM32 ADC": > https://www.spinics.net/lists/arm-kernel/msg559091.html > > Following various comments on this, I sent this RFC to address two > topics, that I see as possible prerequisite: > - Add trigger OF support > - GPIO based trigger
I wonder if we could use configfs to create and configure a GPIO based trigger.
You should just create another trigger type (look into drivers/iio/trigger/iio-trig-hrtimer.c) the userspace API will look like this:
# cd /config/iio/triggers # insert your iio-trig-gpio # setup the global parameters for the GPIO (the local params can be set via dts/acpi) # cd /config/iio/trigers/gpios/
#mkdir t1
And this will create an io-gpio-trigger named t1.
Not sure this fits your usecase but would be nice to consider.
thanks, Daniel.
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