linux-kernel - [PATCH 0/8] Support dynamic EMC frequency scaling on Tegra186/Tegra194

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Message-Id: <20250831-tegra186-icc-v1-0-607ddc53b507@gmail.com>
Date: Sun, 31 Aug 2025 22:33:48 -0500
From: Aaron Kling via B4 Relay <devnull+webgeek1234.gmail.com@...nel.org>
To: Krzysztof Kozlowski <krzk@...nel.org>, Rob Herring <robh@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Thierry Reding <thierry.reding@...il.com>, 
 Jonathan Hunter <jonathanh@...dia.com>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, 
 Viresh Kumar <viresh.kumar@...aro.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org, 
 Aaron Kling <webgeek1234@...il.com>
Subject: [PATCH 0/8] Support dynamic EMC frequency scaling on
 Tegra186/Tegra194

This series borrows the concept used on Tegra234 to scale EMC based on
CPU frequency and applies it to Tegra186 and Tegra194. Except that the
bpmp on those archs does not support bandwidth manager, so the scaling
iteself is handled similar to how Tegra124 currently works.

Signed-off-by: Aaron Kling <webgeek1234@...il.com>
---
Aaron Kling (8):
      dt-bindings: tegra: Add ICC IDs for dummy memory clients for Tegra186
      dt-bindings: tegra: Add ICC IDs for dummy memory clients for Tegra194
      cpufreq: tegra186: add OPP support and set bandwidth
      memory: tegra186-emc: Support non-bpmp icc scaling
      memory: tegra186: Support icc scaling
      memory: tegra194: Support icc scaling
      arm64: tegra: Add CPU OPP tables for Tegra186
      arm64: tegra: Add CPU OPP tables for Tegra194

 arch/arm64/boot/dts/nvidia/tegra186.dtsi | 317 +++++++++++++++
 arch/arm64/boot/dts/nvidia/tegra194.dtsi | 636 +++++++++++++++++++++++++++++++
 drivers/cpufreq/tegra186-cpufreq.c       | 152 +++++++-
 drivers/memory/tegra/tegra186-emc.c      | 132 ++++++-
 drivers/memory/tegra/tegra186.c          |  48 +++
 drivers/memory/tegra/tegra194.c          |  59 ++-
 include/dt-bindings/memory/tegra186-mc.h |   4 +
 include/dt-bindings/memory/tegra194-mc.h |   6 +
 8 files changed, 1344 insertions(+), 10 deletions(-)
---
base-commit: 1b237f190eb3d36f52dffe07a40b5eb210280e00
change-id: 20250823-tegra186-icc-7299110cd774
prerequisite-change-id: 20250826-tegra186-cpufreq-fixes-7fbff81c68a2:v3
prerequisite-patch-id: 74a2633b412b641f9808306cff9b0a697851d6c8
prerequisite-patch-id: 9c52827317f7abfb93885febb1894b40967bd64c

Best regards,
-- 
Aaron Kling <webgeek1234@...il.com>