From bee278e18e641a4bc11513b0fa8f5eb2667b8a32 Mon Sep 17 00:00:00 2001
From: Sebastian Reichel <sre@kernel.org>
Date: Thu, 18 Sep 2025 23:20:26 +0200
Subject: [PATCH] dt-bindings: embedded-controller: Add Lenovo Thinkpad T14s EC
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Add binding for the EC found in the Thinkpad T14s Gen6 Snapdragon,
which is based on the Qualcomm X1 Elite. Some of the system LEDs
and extra keys are only accessible via the EC.

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20250918-thinkpad-t14s-ec-v5-1-ac0bc6382c5c@collabora.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 .../lenovo,thinkpad-t14s-ec.yaml              | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/embedded-controller/lenovo,thinkpad-t14s-ec.yaml

diff --git a/Documentation/devicetree/bindings/embedded-controller/lenovo,thinkpad-t14s-ec.yaml b/Documentation/devicetree/bindings/embedded-controller/lenovo,thinkpad-t14s-ec.yaml
new file mode 100644
index 0000000000000..c87ccb5b30868
--- /dev/null
+++ b/Documentation/devicetree/bindings/embedded-controller/lenovo,thinkpad-t14s-ec.yaml
@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/embedded-controller/lenovo,thinkpad-t14s-ec.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Lenovo Thinkpad T14s Embedded Controller
+
+maintainers:
+  - Sebastian Reichel <sre@kernel.org>
+
+description:
+  The Qualcomm Snapdragon-based Lenovo Thinkpad T14s has an Embedded Controller
+  (EC) which handles things such as keyboard backlight, LEDs or non-standard
+  keys.
+
+properties:
+  compatible:
+    const: lenovo,thinkpad-t14s-ec
+
+  reg:
+    const: 0x28
+
+  interrupts:
+    maxItems: 1
+
+  wakeup-source: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |+
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        embedded-controller@28 {
+            compatible = "lenovo,thinkpad-t14s-ec";
+            reg = <0x28>;
+            interrupts-extended = <&tlmm 66 IRQ_TYPE_LEVEL_LOW>;
+            wakeup-source;
+        };
+    };
+...
-- 
2.47.3