1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c
index 9a8e286dd86f..c6df14802741 100644
--- a/drivers/acpi/x86/utils.c
+++ b/drivers/acpi/x86/utils.c
@@ -56,6 +56,11 @@ static const struct always_present_id always_present_ids[] = {
          */
         ENTRY("80860F09", "1", ICPU(INTEL_FAM6_ATOM_SILVERMONT), {}),
         ENTRY("80862288", "1", ICPU(INTEL_FAM6_ATOM_AIRMONT), {}),
+
+        /* Lenovo Yoga Book uses PWM2 for keyboard backlight control */
+        ENTRY("80862289", "2", ICPU(INTEL_FAM6_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.