[PATCH v2 1/2] dt-bindings: embedded-controller: add Lenovo Yoga Slim 7x Gen 11 EC
From: Oleg Keri <hidden>
Date: 2026-09-08 18:34:19
Also in:
linux-arm-msm, linux-hwmon, lkml, platform-driver-x86
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Document the Compal embedded controller found on the Lenovo Yoga Slim 7x Gen 11, a Qualcomm Snapdragon X2 Elite (glymur) laptop. It sits on I2C at address 0x70 and is distinct from the Qualcomm reference EC that the reference designs place at 0x76. Signed-off-by: Oleg Keri <redacted> Acked-by: Conor Dooley <conor.dooley@microchip.com> --- .../lenovo,yoga-slim7x-gen11-ec.yaml | 56 +++++++++++++++++++ MAINTAINERS | 8 +++ 2 files changed, 64 insertions(+) create mode 100644 Documentation/devicetree/bindings/embedded-controller/lenovo,yoga-slim7x-gen11-ec.yaml
diff --git a/Documentation/devicetree/bindings/embedded-controller/lenovo,yoga-slim7x-gen11-ec.yaml b/Documentation/devicetree/bindings/embedded-controller/lenovo,yoga-slim7x-gen11-ec.yaml
new file mode 100644
index 000000000000..37337de86b0b
--- /dev/null
+++ b/Documentation/devicetree/bindings/embedded-controller/lenovo,yoga-slim7x-gen11-ec.yaml@@ -0,0 +1,56 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/embedded-controller/lenovo,yoga-slim7x-gen11-ec.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Lenovo Yoga Slim 7x Gen 11 Embedded Controller + +maintainers: + - Oleg Keri <okerixx@gmail.com> + +description: + The Lenovo Yoga Slim 7x Gen 11, a Qualcomm Snapdragon X2 Elite (glymur) + laptop, has a Compal embedded controller on I2C. It reports board + thermistors, battery cell voltages and CPU fan speed, and drives the + keyboard backlight. + + This controller is not the Qualcomm reference EC that the Snapdragon + reference designs place at address 0x76; it speaks a different command + set and answers at 0x70. + +properties: + compatible: + const: lenovo,yoga-slim7x-gen11-ec + + reg: + const: 0x70 + + interrupts: + maxItems: 1 + description: + The controller pulses this line while it has events queued. + +required: + - compatible + - reg + - interrupts + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + embedded-controller@70 { + compatible = "lenovo,yoga-slim7x-gen11-ec"; + reg = <0x70>; + + interrupts-extended = <&tlmm 66 IRQ_TYPE_EDGE_FALLING>; + }; + }; +...
diff --git a/MAINTAINERS b/MAINTAINERS
index 38612eca2987..e35679264e22 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS@@ -14882,6 +14882,14 @@ S: Maintained F: Documentation/ABI/testing/sysfs-driver-lenovo-yb9-kbdock F: drivers/platform/x86/lenovo/yb9-kbdock.c +LENOVO YOGA SLIM 7X GEN 11 EMBEDDED CONTROLLER DRIVER +M: Oleg Keri <okerixx@gmail.com> +L: linux-arm-msm@vger.kernel.org +S: Maintained +F: Documentation/ABI/testing/sysfs-driver-lenovo-yoga-slim7x-gen11-ec +F: Documentation/devicetree/bindings/embedded-controller/lenovo,yoga-slim7x-gen11-ec.yaml +F: drivers/platform/arm64/lenovo-yoga-slim7x-gen11-ec.c + LETSKETCH HID TABLET DRIVER M: Hans de Goede <hansg@kernel.org> L: linux-input@vger.kernel.org
--
2.55.0