linux-kernel - Re: [PATCH v2 1/2] gpio: mlxbf2: Introduce IRQ support

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Message-ID: <YUyS6fqD1TJU+sPt@lunn.ch>
Date:   Thu, 23 Sep 2021 16:44:57 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Asmaa Mnebhi <asmaa@...dia.com>
Cc:     "andy.shevchenko@...il.com" <andy.shevchenko@...il.com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        "bgolaszewski@...libre.com" <bgolaszewski@...libre.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>,
        David Thompson <davthompson@...dia.com>
Subject: Re: [PATCH v2 1/2] gpio: mlxbf2: Introduce IRQ support

> No we don't. I double checked with the HW team and they confirmed that
> YU_GPIO_CAUSE_FALL_EN and YU_GPIO_CAUSE_RISE_EN are used in
> Both level and edge interrupts cases.

How? They are different things.

I suggest you test this. Make sure a level interrupt real does fire on
level. One simple test is use a resistor to force the interrupt pin
low. Your machine should then die in an interrupt storm, until the
kernel declares the interrupt broken and disables it.

       Andrew