On Fri, Feb 17, 2017 at 6:03 PM, Fabrice Gasnier <fabrice.gasnier@xxxxxx> 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. -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
