From: Andrew Lunn <andrew@lunn.ch>
To: Asmaa Mnebhi <asmaa@nvidia.com>
Cc: "linus.walleij@linaro.org" <linus.walleij@linaro.org>,
"bgolaszewski@baylibre.com" <bgolaszewski@baylibre.com>,
David Thompson <davthompson@nvidia.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>
Subject: Re: [PATCH v1 1/1] gpio: Support interrupts in gpio-mlxbf2.c
Date: Fri, 19 Mar 2021 14:23:29 +0100 [thread overview]
Message-ID: <YFSl0Vrh04etK28J@lunn.ch> (raw)
In-Reply-To: <CH2PR12MB3895A0BC2910997D8B64896BD7689@CH2PR12MB3895.namprd12.prod.outlook.com>
> We cannot really pass it through the ACPI table because the ACPI
> table is common to all BlueField-2 boards. And each board may have
> a different GPIO pin associated with a particular function. This is
> why we use ACPI properties instead of GpioInt(). So that the
> bootloader can change the GPIO pin value based on the board id
> detected at boot time.
That sounds very broken.
ACPI describes the hardware. If the hardware is different, you need
different ACPI. And i assume the ACPI spec says GpioInt() is the
correct way to do this, and does not say you can hack around
limitations of your bootloader using properties?
Andrew
next prev parent reply other threads:[~2021-03-19 13:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1614120685-7452-1-git-send-email-Asmaa@mellanox.com>
[not found] ` <1614120685-7452-2-git-send-email-Asmaa@mellanox.com>
2021-03-02 14:02 ` [PATCH v1 1/1] gpio: Support interrupts in gpio-mlxbf2.c Linus Walleij
2021-03-02 15:26 ` Andy Shevchenko
[not found] ` <CH2PR12MB38958655696585998CFDF67BD7919@CH2PR12MB3895.namprd12.prod.outlook.com>
2021-03-19 12:53 ` Asmaa Mnebhi
2021-03-19 13:23 ` Andrew Lunn [this message]
2021-03-19 15:44 ` Andy Shevchenko
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