ACPI / x86: Drop PWM2 device on Lenovo Yoga Book from always present table

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>

diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c
index f22f239..3bcac98 100644 (file)
--- 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.