linux/drivers/iio/trigger, branch v4.9

iio:trigger: Experimental kthread tight loop trigger (thread only)

2016-06-03T12:18:44Z

This patch is in response to that of Gregor Boirie who proposed using a tight kthread within a device driver (be it with the support factored out into a helper library) in order to basically spin as fast as possible. It is meant as a talking point rather than a formal proposal of the code (though we are heading towards that I think). Also gives people some working code to mess around with. I proposed that this could be done with a trigger with a few constraints and this is the proof (be it ugly) of that. There are some constraints though, some of which we would want to relax if this were to move forward. * Will only run the thread part of the registered pollfunc. This is to avoid the overhead of jumping in and out of interrupt context. Is the overhead significant? Not certain but feels like it should be! * This limitation precludes any device that 'must' do some work in interrupt context. However, that is true of few if any drivers and I suspect that any that do will be restricted to using triggers they provide themselves. Usually we have a top half mainly to grab a timestamp as soon after the dataready type signal as possible. Signed-off-by: Jonathan Cameron Acked-by: Daniel Baluta

iio: trigger: Introduce IIO hrtimer based trigger

2015-12-03T18:19:27Z

This patch registers a new IIO software trigger interrupt source based on high resolution timers. Notice that if configfs is enabled we create sampling_frequency attribute allowing users to change hrtimer period (1/sampling_frequency). The IIO hrtimer trigger has a long history, this patch is based on an older version from Marten and Lars-Peter. Signed-off-by: Marten Svanfeldt Signed-off-by: Lars-Peter Clausen Signed-off-by: Daniel Baluta Signed-off-by: Jonathan Cameron

iio: trigger: Add a blank line after declarations

2014-12-26T12:15:36Z

This patch fixes the following checkpatch.pl warning: WARNING: Missing a blank line after declarations Signed-off-by: Roberta Dobrescu Reviewed-by: Daniel Baluta Signed-off-by: Jonathan Cameron

iio: remove .owner field for driver using module_platform_driver

2014-08-26T20:08:38Z

This patch removes the .owner field for drivers which use the platform_driver_register api because this is overriden in _platform_driver_register. Signed-off-by: Sanjeev Sharma Signed-off-by: Jonathan Cameron

iio: Remove timestamp argument from iio_trigger_poll() and iio_trigger_poll_chained()

2014-06-14T15:25:59Z

argument has been ignored; adjust drivers accordingly Signed-off-by: Peter Meerwald Signed-off-by: Jonathan Cameron

iio:trigger: fix sysfs name on list mutex

2013-09-28T10:51:16Z

Signed-off-by: Denis Ciocca Signed-off-by: Jonathan Cameron

iio: Add a comment to about alphabetical order to Kconfigs and Makefiles

2013-08-03T17:40:36Z

Keeping Makefile and Kconfig entries in alphabetical order usually works better than just appending new entries at the end, since it reduces the amount of conflicts. This patch adds a comment to the IIO Kconfig and Makefile files to document that the entries should be kept in alphabetical order. Also reorder those entries which weren't in alphabetical order yet. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron

iio: fix Kconfig typos

2013-08-03T17:40:29Z

Signed-off-by: Peter Meerwald Signed-off-by: Jonathan Cameron

iio:trigger:interrupt fix formatting of rsize variable in name

2013-06-08T09:00:58Z

The name includes irq_res->start which of type resource_size_t not integer. We could in theory use %pa for this but then it would be in hex and also that causes a warning about incorrect types anyway. Hence just use the irq local variable we assigned the line above. Reported-by: Fengguang Wu Signed-off-by: Jonathan Cameron

iio:triggers:interrupt trigger - move out of staging.

2013-06-04T17:33:19Z

This is now a very simple trigger indeed but useful in many common cases. Signed-off-by: Jonathan Cameron Reviewed-by: Lars-Peter Clausen