linux-kernel - [PATCH 0/2] Fix CPU and GPU clocks on RK3576

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Message-Id: <20250310-rk3576-scmi-clocks-v1-0-e165deb034e8@collabora.com>
Date: Mon, 10 Mar 2025 10:59:55 +0100
From: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
To: Jonas Karlman <jonas@...boo.se>, 
 Sebastian Reichel <sebastian.reichel@...labora.com>, 
 Heiko Stuebner <heiko@...ech.de>, 
 Detlev Casanova <detlev.casanova@...labora.com>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Liang Chen <cl@...k-chips.com>, 
 Elaine Zhang <zhangqing@...k-chips.com>, 
 Finley Xiao <finley.xiao@...k-chips.com>, 
 Yifeng Zhao <yifeng.zhao@...k-chips.com>
Cc: kernel@...labora.com, linux-clk@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH 0/2] Fix CPU and GPU clocks on RK3576

As Jonas Karlman pointed out on the #linux-rockchip IRC channel on
Libera yesterday, mainline has once again chosen a different set of
clock IDs compared to downstream, with hugely detrimental effects to
mainline's ability to use SCMI for clock operations. This is because
TF-A will use the downstream IDs, and when we reclock things through
SCMI, TF-A will get the wrong clock ID from us.

So this series adds the three relevant clock IDs to the bindings in
patch 1, and then uses them in the SoC .dtsi in patch 2. That way, we
actually get functional GPU reclocking, and cpufreq will work as well.
As a bonus, we no longer change random unrelated clocks all over the
place, and it seems somewhat miraculous this didn't blow up in our faces
in a much bigger way before this.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
Nicolas Frattaroli (2):
      dt-bindings: clock: rk3576: add SCMI clocks
      arm64: dts: rockchip: fix RK3576 SCMI clock IDs

 arch/arm64/boot/dts/rockchip/rk3576.dtsi        | 18 +++++++++---------
 include/dt-bindings/clock/rockchip,rk3576-cru.h |  5 +++++
 2 files changed, 14 insertions(+), 9 deletions(-)
---
base-commit: f064b0a4aa5f2bc61c9611a23a7fc83855751626
change-id: 20250310-rk3576-scmi-clocks-a30655d70a72

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