linux-kernel - [PATCH 2/2] gpiolib: acpi: Add a quirk for Asus UM325UAZ

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Date:   Tue, 19 Jul 2022 09:21:42 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     <mario.limonciello@....com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>
CC:     Pavel Krc <reg.krn@...c.net>, <linux-gpio@...r.kernel.org>,
        <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/2] gpiolib: acpi: Add a quirk for Asus UM325UAZ

Asus UM325UAZ has GPIO 18 programmed as both an interrupt and a wake
source, but confirmed with internal team on this design this pin is
floating and shouldn't have been programmed. This causes lots of
spurious IRQs on the system and horrendous battery life.

Add a quirk to ignore attempts to program this pin on this system.

Reported-and-tested-by: Pavel Krc <reg.krn@...c.net>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216208
Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 drivers/gpio/gpiolib-acpi.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 375942d92d6f..2149713ea8f1 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -1586,6 +1586,20 @@ static const struct dmi_system_id gpiolib_acpi_quirks[] __initconst = {
 			.ignore_wake = "INT33FF:01@0",
 		},
 	},
+	{
+		/*
+		 * Interrupt storm caused from edge triggered floating pin
+		 * Found in BIOS UX325UAZ.300
+		 * https://bugzilla.kernel.org/show_bug.cgi?id=216208
+		 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "ZenBook UX325UAZ_UM325UAZ"),
+		},
+		.driver_data = &(struct acpi_gpiolib_dmi_quirk) {
+			.ignore_interrupt = "AMDI0030:00@18",
+		},
+	},
 	{} /* Terminating entry */
 };
 
-- 
2.34.1