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

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Date:   Fri, 20 Sep 2019 11:31:12 +0530
From:   Srinath Mannam <srinath.mannam@...adcom.com>
To:     Linus Walleij <linus.walleij@...aro.org>
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

Hi Linus,

We have tested patch with your changes, it works fine.
Thanks a lot for all the help.

Regards,
Srinath.

On Wed, Sep 11, 2019 at 3:13 PM Linus Walleij <linus.walleij@...aro.org> wrote:
>
> 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