linux-kernel - [PATCH 3/8] dt-bindings: mfd: Add Google GS101 TMU Syscon

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Message-Id: <20260114-acpm-tmu-v1-3-cfe56d93e90f@linaro.org>
Date: Wed, 14 Jan 2026 14:16:31 +0000
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: "Rafael J. Wysocki" <rafael@...nel.org>, 
 Daniel Lezcano <daniel.lezcano@...aro.org>, Zhang Rui <rui.zhang@...el.com>, 
 Lukasz Luba <lukasz.luba@....com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>, 
 Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, 
 Peter Griffin <peter.griffin@...aro.org>, 
 André Draszik <andre.draszik@...aro.org>, 
 Bartlomiej Zolnierkiewicz <bzolnier@...il.com>, Kees Cook <kees@...nel.org>, 
 "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: willmcvicker@...gle.com, jyescas@...gle.com, shin.son@...sung.com, 
 linux-pm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-samsung-soc@...r.kernel.org, linux-hardening@...r.kernel.org, 
 Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: [PATCH 3/8] dt-bindings: mfd: Add Google GS101 TMU Syscon

Document the bindings for the Thermal Management Unit (TMU) System
Controller found on Google GS101 SoCs.

This memory-mapped block exposes the registers required for reading
thermal interrupt status bits. It functions as a syscon provider,
allowing the main thermal driver to access these registers while
the firmware manages the core thermal logic.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
---
 .../bindings/mfd/google,gs101-tmu-syscon.yaml      | 37 ++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/google,gs101-tmu-syscon.yaml b/Documentation/devicetree/bindings/mfd/google,gs101-tmu-syscon.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..6a11e43abeaa23ee473be2153478436856277714
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/google,gs101-tmu-syscon.yaml
@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/google,gs101-tmu-syscon.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Google GS101 TMU System Controller
+
+maintainers:
+  - Tudor Ambarus <tudor.ambarus@...aro.org>
+
+description: |
+  The TMU System Controller provides a memory-mapped interface for
+  accessing the interrupt status registers of the Thermal Management
+  Unit. It is used as a syscon provider for the main TMU driver.
+
+properties:
+  compatible:
+    items:
+      - const: google,gs101-tmu-syscon
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    syscon@...a0000 {
+        compatible = "google,gs101-tmu-syscon", "syscon";
+        reg = <0x100a0000 0x800>;
+    };

-- 
2.52.0.457.g6b5491de43-goog