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Wysocki" , Len Brown , Hans de Goede , linux-kernel@vger.kernel.org, Yauhen Kharuzhy Subject: [PATCH] ACPI: x86: Force enabling of PWM2 on the Yogabook YB1-X90 Date: Thu, 12 Feb 2026 00:22:42 +0200 Message-ID: <20260211222242.4101162-1-jekhor@gmail.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The PWM2 on YB1-X90 tablets is used for keyboard backlight control but it is disabled in the ACPI DSDT table. Add it to the override_status_ids list to allow keyboard function control driver (drivers/platform/x86/lenovo/yogabook.c) to use it. Signed-off-by: Yauhen Kharuzhy --- drivers/acpi/x86/utils.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c index 4ee30c2897a2..418951639f51 100644 --- a/drivers/acpi/x86/utils.c +++ b/drivers/acpi/x86/utils.c @@ -81,6 +81,18 @@ static const struct override_status_id override_status_i= ds[] =3D { DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"), }), =20 + /* + * Lenovo Yoga Book uses PWM2 for touch keyboard backlight control. + * It needs to be enabled only for the Android device version (YB1-X90* + * aka YETI-11); the Windows version (YB1-X91*) uses ACPI control + * methods. + */ + PRESENT_ENTRY_HID("80862289", "2", INTEL_ATOM_AIRMONT, { + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"), + DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"), + }), + /* * The INT0002 device is necessary to clear wakeup interrupt sources * on Cherry Trail devices, without it we get nobody cared IRQ msgs. --=20 2.51.0