[PATCH 1/2] dt-bindings: embedded-controller: add Lenovo Yoga Slim 7x Gen 11 EC

[Oleg Keri <okerixx@gmail.com>]

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 <okerixx@gmail.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