linux-kernel - [PATCH 1/5] dt-bindings: mfd: syscon: Add mt8196 fdvfs syscons

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Message-Id: <20250711-mt8196-cpufreq-v1-1-e1b0a3b4ac61@collabora.com>
Date: Fri, 11 Jul 2025 16:57:33 +0200
From: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
To: Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, 
 Viresh Kumar <viresh.kumar@...aro.org>, 
 Hector Yuan <hector.yuan@...iatek.com>
Cc: kernel@...labora.com, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, linux-pm@...r.kernel.org, 
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH 1/5] dt-bindings: mfd: syscon: Add mt8196 fdvfs syscons

The MT8196 SoC uses two syscon ranges for CPU DVFS that are separate
from each other. One, mt8196-fdvfs-config, is used to check for a magic
number at that memory address to verify that fdvfs should be used. The
other, mt8196-fdvfs, is used to configure the desired frequency for the
DVFS controller for each CPU core.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
 Documentation/devicetree/bindings/mfd/syscon.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/syscon.yaml b/Documentation/devicetree/bindings/mfd/syscon.yaml
index 27672adeb1fedb7c81b8ae86c35f4f3b26d5516f..5ee49d2ba0cdb72dd697a0fd71c8416ad4fd2c1e 100644
--- a/Documentation/devicetree/bindings/mfd/syscon.yaml
+++ b/Documentation/devicetree/bindings/mfd/syscon.yaml
@@ -88,6 +88,8 @@ select:
           - mediatek,mt8135-pctl-a-syscfg
           - mediatek,mt8135-pctl-b-syscfg
           - mediatek,mt8173-pctl-a-syscfg
+          - mediatek,mt8196-fdvfs
+          - mediatek,mt8196-fdvfs-config
           - mediatek,mt8365-syscfg
           - microchip,lan966x-cpu-syscon
           - microchip,mpfs-sysreg-scb
@@ -194,6 +196,8 @@ properties:
           - mediatek,mt8135-pctl-a-syscfg
           - mediatek,mt8135-pctl-b-syscfg
           - mediatek,mt8173-pctl-a-syscfg
+          - mediatek,mt8196-fdvfs
+          - mediatek,mt8196-fdvfs-config
           - mediatek,mt8365-infracfg-nao
           - mediatek,mt8365-syscfg
           - microchip,lan966x-cpu-syscon

-- 
2.50.0