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.
Revert commit ff6cdfd71495 ("ACPI / x86: Make PWM2 device always present
at Lenovo Yoga Book"), removing the always-present quirk for the PWM2
ACPI-device, so that the lpss-pwm controller will no longer bind to it.
Cc: Yauhen Kharuzhy <jekhor@xxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
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 cb988f9b23a1..bfcb76888ca7 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 Xiaomi Mi Pad 2 uses PWM2 for touchkeys backlight control */
ENTRY("80862289", "2", X86_MATCH(ATOM_AIRMONT), {
DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
--
2.31.1
