linux-kernel - [PATCH] arm64: dts: rockchip: Remove non-functioning CPU OPPs from RK3576

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Message-Id: <20251009-rk3576_opp-v1-1-67f073a7323f@gmail.com>
Date: Thu, 09 Oct 2025 16:34:01 +0400
From: Alexey Charkov <alchark@...il.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>, 
 Yifeng Zhao <yifeng.zhao@...k-chips.com>, 
 Finley Xiao <finley.xiao@...k-chips.com>, 
 Detlev Casanova <detlev.casanova@...labora.com>, 
 Elaine Zhang <zhangqing@...k-chips.com>, Liang Chen <cl@...k-chips.com>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 stable@...r.kernel.org, Alexey Charkov <alchark@...il.com>
Subject: [PATCH] arm64: dts: rockchip: Remove non-functioning CPU OPPs from
 RK3576

Drop the top-frequency OPPs from both the LITTLE and big CPU clusters on
RK3576, as neither the opensource TF-A [1] nor the recent (after v1.08)
binary BL31 images provided by Rockchip expose those.

This fixes the problem [2] when the cpufreq governor tries to jump
directly to the highest-frequency OPP, which results in a failed SCMI call
leaving the system stuck at the previous OPP before the attempted change.

[1] https://github.com/ARM-software/arm-trusted-firmware/blob/master/plat/rockchip/rk3576/scmi/rk3576_clk.c#L264-L304
[2] https://lore.kernel.org/linux-rockchip/CABjd4Yz4NbqzZH4Qsed3ias56gcga9K6CmYA+BLDBxtbG915Ag@mail.gmail.com/

Fixes: 57b1ce903966 ("arm64: dts: rockchip: Add rk3576 SoC base DT")
Cc: stable@...r.kernel.org
Signed-off-by: Alexey Charkov <alchark@...il.com>
---
 arch/arm64/boot/dts/rockchip/rk3576.dtsi | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576.dtsi b/arch/arm64/boot/dts/rockchip/rk3576.dtsi
index fc4e9e07f1cf35fb57f132c6d82c48c62bd6265d..f0c3ab00a7f3447a1dbf7874c7bf758e82e04f25 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3576.dtsi
@@ -276,12 +276,6 @@ opp-2016000000 {
 			opp-microvolt = <900000 900000 950000>;
 			clock-latency-ns = <40000>;
 		};
-
-		opp-2208000000 {
-			opp-hz = /bits/ 64 <2208000000>;
-			opp-microvolt = <950000 950000 950000>;
-			clock-latency-ns = <40000>;
-		};
 	};
 
 	cluster1_opp_table: opp-table-cluster1 {
@@ -348,12 +342,6 @@ opp-2208000000 {
 			opp-microvolt = <925000 925000 950000>;
 			clock-latency-ns = <40000>;
 		};
-
-		opp-2304000000 {
-			opp-hz = /bits/ 64 <2304000000>;
-			opp-microvolt = <950000 950000 950000>;
-			clock-latency-ns = <40000>;
-		};
 	};
 
 	gpu_opp_table: opp-table-gpu {

---
base-commit: ec714e371f22f716a04e6ecb2a24988c92b26911
change-id: 20251009-rk3576_opp-7bafcadef820

Best regards,
-- 
Alexey Charkov <alchark@...il.com>