2017-07-19 14:25 GMT+02:00 Thomas Gleixner <[email protected]>: > On Wed, 19 Jul 2017, Bartosz Golaszewski wrote: > >> Some frameworks (e.g. iio, gpiolib) use irq_work to implement simulated >> interrupts that can be 'fired' from process context when needed and >> requested just like normal interrupts. This is useful for testing and >> development purposes. >> >> Currently this code is reimplemented by every user. This series >> proposes to add a new set of functions that can be used by drivers >> that want to simulate interrupts without having to duplicate any >> boilerplate code. >> >> The first patch adds a simple irq simulator framework. The second >> extends it with resource management. The third uses the new >> functionality in the gpio-mockup testing driver. >> >> NOTE: The next candidate for using this API would be iio-dummy-evgen. > > I like the general idea - have not looked at the code yet. Just a quick > question: How many copies/variants of this scheme do we have in tree? > > Thanks, > > tglx
Currently there are two: iio and gpiolib basically duplicate the same code in their respective testing drivers. I only used irq_sim in gpio-mockup in this series as an example and to see if there's any interest in merging it before spending time on iio-dummy-evgen. In the future this could be used in any framework that uses interrupts and wants to test the irq code paths without touching any specific hardware. Thanks, Bartosz
