linux-kernel - Re: [PATCH v4 2/2] irq/irq

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Date:   Tue, 12 May 2020 14:16:49 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-iio <linux-iio@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH v4 2/2] irq/irq_sim: simplify the API

On Thu, Apr 30, 2020 at 4:30 PM Bartosz Golaszewski <brgl@...ev.pl> wrote:

> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
>
> The interrupt simulator API exposes a lot of custom data structures and
> functions and doesn't reuse the interfaces already exposed by the irq
> subsystem. This patch tries to address it.
>
> We hide all the simulator-related data structures from users and instead
> rely on the well-known irq domain. When creating the interrupt simulator
> the user receives a pointer to a newly created irq_domain and can use it
> to create mappings for simulated interrupts.
>
> It is also possible to pass a handle to fwnode when creating the simulator
> domain and retrieve it using irq_find_matching_fwnode().
>
> The irq_sim_fire() function now only takes the virtual interrupt number
> as argument - there's no need anymore to pass it any data structure linked
> to the simulator.
>
> We modify the two modules that use the simulator at the same time as
> adding these changes in order to reduce the intermediate bloat that would
> result when trying to migrate the drivers in separate patches.
>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> Acked-by: Jonathan Cameron <Jonathan.Cameron@...wei.com> #for IIO

Acked-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij