From: Hans de Goede hdegoede@redhat.com
stable inclusion from stable-v5.10.94 commit b029625063c16d468c35fa69f59e898f81741aa3 bugzilla: https://gitee.com/openeuler/kernel/issues/I531X9
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit d431dfb764b145369be820fcdfd50f2159b9bbc2 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Acked-by: Xie XiuQi xiexiuqi@huawei.com --- 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 bdc1ba00aee9..baaa44edc944 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.