From d431dfb764b145369be820fcdfd50f2159b9bbc2 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Mon, 22 Nov 2021 18:05:30 +0100
Subject: [PATCH] ACPI / x86: Drop PWM2 device on Lenovo Yoga Book from always present table
Git-commit: d431dfb764b145369be820fcdfd50f2159b9bbc2
Patch-mainline: v5.17-rc1
References: git-fixes
It turns out that there is a WMI object which controls the PWM2 device
used for the keyboard backlight and that WMI object also provides some
other useful functionality.
The upcoming lenovo-yogabook-wmi driver will offer both backlight
control and the other functionality, so there no longer is a need
to have the lpss-pwm driver binding to PWM2 for backlight control;
and this is now actually undesirable because this will cause both
the WMI code and the lpss-pwm driver to poke at the same PWM
controller.
Drop the always-present quirk for the PWM2 ACPI-device, so that the
lpss-pwm controller will no longer bind to it.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/acpi/x86/utils.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c
index f22f23933063..3bcac98f6eca 100644
--- a/drivers/acpi/x86/utils.c
+++ b/drivers/acpi/x86/utils.c
@@ -54,10 +54,6 @@ static const struct always_present_id always_present_ids[] = {
ENTRY("80860F09", "1", X86_MATCH(ATOM_SILVERMONT), {}),
ENTRY("80862288", "1", X86_MATCH(ATOM_AIRMONT), {}),
- /* Lenovo Yoga Book uses PWM2 for keyboard backlight control */
- ENTRY("80862289", "2", X86_MATCH(ATOM_AIRMONT), {
- DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9"),
- }),
/*
* The INT0002 device is necessary to clear wakeup interrupt sources
* on Cherry Trail devices, without it we get nobody cared IRQ msgs.
--
2.31.1