[PATCH 3/8] arm64: dts: allwinner: h616: Add GPU OPP table

[Arun Iyengar via B4 Relay]

From: Arun Iyengar <aiyengar1990@xxxxxxxxx>

Add the operating points of the H616/H618 Mali-G31, so that boards can
enable GPU DVFS through panfrost devfreq: 306 to 600 MHz at 810 to
950 mV. The table is the one of the vendor images (as recovered from a
KickPi K2B image, also carried by Armbian), and follows the H6 GPU OPP
table in using <target min max> voltage triplets with a common 990 mV
maximum, so a board can raise the minimum of the GPU supply without
losing operating points.

Like sun50i-h616-cpu-opp.dtsi, the table is in a separate file that
boards include once their GPU supply is described.

Signed-off-by: Arun Iyengar <aiyengar1990@xxxxxxxxx>
---
 .../boot/dts/allwinner/sun50i-h616-gpu-opp.dtsi    | 62 ++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616-gpu-opp.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616-gpu-opp.dtsi
new file mode 100644
index 000000000000..511174eee271
--- /dev/null
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h616-gpu-opp.dtsi
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+// Copyright (C) 2026 Arun Iyengar <aiyengar1990@xxxxxxxxx>
+
+/ {
+	gpu_opp_table: opp-table-gpu {
+		compatible = "operating-points-v2";
+
+		opp-306000000 {
+			opp-hz = /bits/ 64 <306000000>;
+			opp-microvolt = <810000 810000 990000>;
+		};
+
+		opp-336000000 {
+			opp-hz = /bits/ 64 <336000000>;
+			opp-microvolt = <810000 810000 990000>;
+		};
+
+		opp-360000000 {
+			opp-hz = /bits/ 64 <360000000>;
+			opp-microvolt = <820000 810000 990000>;
+		};
+
+		opp-384000000 {
+			opp-hz = /bits/ 64 <384000000>;
+			opp-microvolt = <830000 810000 990000>;
+		};
+
+		opp-420000000 {
+			opp-hz = /bits/ 64 <420000000>;
+			opp-microvolt = <850000 810000 990000>;
+		};
+
+		opp-456000000 {
+			opp-hz = /bits/ 64 <456000000>;
+			opp-microvolt = <870000 810000 990000>;
+		};
+
+		opp-504000000 {
+			opp-hz = /bits/ 64 <504000000>;
+			opp-microvolt = <890000 810000 990000>;
+		};
+
+		opp-540000000 {
+			opp-hz = /bits/ 64 <540000000>;
+			opp-microvolt = <910000 810000 990000>;
+		};
+
+		opp-576000000 {
+			opp-hz = /bits/ 64 <576000000>;
+			opp-microvolt = <930000 810000 990000>;
+		};
+
+		opp-600000000 {
+			opp-hz = /bits/ 64 <600000000>;
+			opp-microvolt = <950000 810000 990000>;
+		};
+	};
+};
+
+&gpu {
+	operating-points-v2 = <&gpu_opp_table>;
+};

-- 
2.55.0