linux-kernel - Re: [PATCH 2/2] gpio: iproc-gpio: Handle interrupts for multiple instances

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Message-ID: <CACRpkdYyHMHknkrH_Gm45tgwv6dgjFxdoeg+Hj_KBWWyQqV1og@mail.gmail.com>
Date:   Wed, 11 Sep 2019 10:42:57 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Srinath Mannam <srinath.mannam@...adcom.com>
Cc:     Ray Jui <rjui@...adcom.com>, Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>
Subject: Re: [PATCH 2/2] gpio: iproc-gpio: Handle interrupts for multiple instances

On Thu, Aug 29, 2019 at 5:52 AM Srinath Mannam
<srinath.mannam@...adcom.com> wrote:

> From: Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>
>
> When multiple instance of iproc-gpio chips are present, a fix up
> message[1] is printed during the probe of second and later instances.
>
> This issue is because driver sharing same irq_chip data structure
> among multiple instances of driver.
>
> Fix this by allocating irq_chip data structure per instance of
> iproc-gpio.
>
> [1] fix up message addressed by this patch
> [  7.862208] gpio gpiochip2: (689d0000.gpio): detected irqchip that
>    is shared with multiple gpiochips: please fix the driver.
>
> Fixes: 616043d58a89 ("pinctrl: Rename gpio driver from cygnus to iproc")
> Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>

Patch applied, I had to rewrite it a bit to fit the new code that
set up the irqchip when adding the gpio_chip, please check that
the result works.

Yours,
Linus Walleij