linux-kernel - Re: [PATCH 0/3] simulated interrupts

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Message-ID: <alpine.DEB.2.20.1707191424190.2286@nanos>
Date:   Wed, 19 Jul 2017 14:25:15 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Bartosz Golaszewski <brgl@...ev.pl>
cc:     Linus Walleij <linus.walleij@...aro.org>,
        Marc Zyngier <marc.zyngier@....com>,
        Jonathan Corbet <corbet@....net>,
        Bamvor Jian Zhang <bamvor.zhangjian@...aro.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH 0/3] simulated interrupts

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