linux-kernel - [PATCH v2 0/4] MT8196 CPUFreq Support

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Message-Id: <20250714-mt8196-cpufreq-v2-0-cc85e78855c7@collabora.com>
Date: Mon, 14 Jul 2025 16:08:13 +0200
From: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>, 
 Viresh Kumar <viresh.kumar@...aro.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>
Cc: kernel@...labora.com, linux-pm@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH v2 0/4] MT8196 CPUFreq Support

This series adds the necessary bindings and driver changes to integrate
MT8196 CPUFreq into the existing mediatek-cpufreq-hw driver. This
necessitated two preparatory cleanup patches to the driver.

The CPU frequency was verified to actually be changing by comparing
sysbench cpu numbers between fdvfs being enabled and it not being
enabled.

Enablement in the DT will be done once the MT8196 DT lands, so don't be
surprised that no node uses these new compatibles so far.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
Changes in v2:
- Split off mt8196-cpufreq-hw into a new binding.
- Made the fdvfs register regions part of the cpufreq "performance"
  node, instead of using syscons for this.
- Adjusted the driver to iomap those, and use the per-variant struct to
  add an offset for the domains index.
- Link to v1: https://lore.kernel.org/r/20250711-mt8196-cpufreq-v1-0-e1b0a3b4ac61@collabora.com

---
Nicolas Frattaroli (4):
      dt-bindings: cpufreq: Add mediatek,mt8196-cpufreq-hw binding
      cpufreq: mediatek-hw: Refactor match data into struct
      cpufreq: mediatek-hw: Separate per-domain and per-instance data
      cpufreq: mediatek-hw: Add support for MT8196

 .../cpufreq/mediatek,mt8196-cpufreq-hw.yaml        |  86 +++++++++++++
 drivers/cpufreq/mediatek-cpufreq-hw.c              | 139 +++++++++++++++++----
 2 files changed, 200 insertions(+), 25 deletions(-)
---
base-commit: 42f78243e0c6fe42f2710f98513a55c102347ff0
change-id: 20250711-mt8196-cpufreq-86d961e2300b

Best regards,
-- 
Nicolas Frattaroli <nicolas.frattaroli@...labora.com>