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From: Daniele Briguglio <hello@superkali.me>
To: devicetree@vger.kernel.org
Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org,
	heiko@sntech.de, alchark@gmail.com,
	linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org,
	Daniele Briguglio <daniele.briguglio@icloud.com>,
	Daniele Briguglio <hello@superkali.me>
Subject: [PATCH] rockchip: dts: rk3588: add missing OPP nodes for lower frequencies
Date: Thu,  3 Apr 2025 09:18:40 +0000	[thread overview]
Message-ID: <20250403091840.3349637-1-hello@superkali.me> (raw)

From: Daniele Briguglio <daniele.briguglio@icloud.com>

This Patch adds missing Operating Performance Point (OPP) nodes for lower
frequencies to the RK3588 device tree. These additions improve power
management by enabling the CPU clusters to scale down to lower
frequencies when under light loads, which should improve energy
efficiency and reduce power consumption.

The changes add OPP nodes for 408MHz, 600MHz, 816MHz, and 1008MHz
(for cluster1 and cluster2 only, as cluster0 already had 1008MHz)
with appropriate voltage settings across all three CPU clusters in
the RK3588 SoC.

Signed-off-by: Daniele Briguglio <hello@superkali.me>
---
 arch/arm64/boot/dts/rockchip/rk3588-opp.dtsi | 58 ++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-opp.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-opp.dtsi
index 0f1a77697351..1b018823d5d3 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-opp.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-opp.dtsi
@@ -5,6 +5,22 @@ cluster0_opp_table: opp-table-cluster0 {
 		compatible = "operating-points-v2";
 		opp-shared;
 
+		opp-408000000 {
+			opp-hz = /bits/ 64 <408000000>;
+			opp-microvolt = <675000 675000 950000>;
+			clock-latency-ns = <40000>;
+			opp-suspend;
+		};
+		opp-600000000 {
+			opp-hz = /bits/ 64 <600000000>;
+			opp-microvolt = <675000 675000 950000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-816000000 {
+			opp-hz = /bits/ 64 <816000000>;
+			opp-microvolt = <675000 675000 950000>;
+			clock-latency-ns = <40000>;
+		};
 		opp-1008000000 {
 			opp-hz = /bits/ 64 <1008000000>;
 			opp-microvolt = <675000 675000 950000>;
@@ -37,6 +53,27 @@ cluster1_opp_table: opp-table-cluster1 {
 		compatible = "operating-points-v2";
 		opp-shared;
 
+		opp-408000000 {
+			opp-hz = /bits/ 64 <408000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+			opp-suspend;
+		};
+		opp-600000000 {
+			opp-hz = /bits/ 64 <600000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-816000000 {
+			opp-hz = /bits/ 64 <816000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-1008000000 {
+			opp-hz = /bits/ 64 <1008000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+		};
 		opp-1200000000 {
 			opp-hz = /bits/ 64 <1200000000>;
 			opp-microvolt = <675000 675000 1000000>;
@@ -78,6 +115,27 @@ cluster2_opp_table: opp-table-cluster2 {
 		compatible = "operating-points-v2";
 		opp-shared;
 
+		opp-408000000 {
+			opp-hz = /bits/ 64 <408000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+			opp-suspend;
+		};
+		opp-600000000 {
+			opp-hz = /bits/ 64 <600000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-816000000 {
+			opp-hz = /bits/ 64 <816000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-1008000000 {
+			opp-hz = /bits/ 64 <1008000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+		};
 		opp-1200000000 {
 			opp-hz = /bits/ 64 <1200000000>;
 			opp-microvolt = <675000 675000 1000000>;
-- 
2.34.1


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             reply	other threads:[~2025-04-03 11:19 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-04-03  9:18 Daniele Briguglio [this message]
2025-04-03  9:24 ` [PATCH] rockchip: dts: rk3588: add missing OPP nodes for lower frequencies Heiko Stübner
2025-04-03  9:41   ` Daniele Briguglio

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