arm64: dts: meson-g12b-odroid-n2*: Add support for overclocking Hardkernel ODROID-N2 boards.

Hardkernel actively supports overclocking these boards in their own documentation. (https://wiki.odroid.com/odroid-n2/hardware/overclocking)

This aligns the SoC opps with those in the board vendors bsp source.

Signed-off-by Adam Green <[email protected]>

---
 .../dts/amlogic/meson-g12b-odroid-n2-plus.dts | 25 +++++++++++++++++++
 .../boot/dts/amlogic/meson-g12b-odroid-n2.dts | 17 +++++++++++++
 .../dts/amlogic/meson-g12b-odroid-n2l.dts     | 25 +++++++++++++++++++
 3 files changed, 67 insertions(+)

arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2-plus.dts +25 -0

index ce1198ad34e4..1731d542a00c 100644
@@ -15,6 +15,31 @@ / {
 	model = "Hardkernel ODROID-N2Plus";
 };
 
+&cpu_opp_table_0 {
+	opp-1908000000 {
+		opp-hz = /bits/ 64 <1908000000>;
+		opp-microvolt = <1030000>;
+	};
+	opp-2016000000 {
+		opp-hz = /bits/ 64 <2016000000>;
+		opp-microvolt = <1040000>;
+		turbo-mode;
+	};
+};
+
+&cpub_opp_table_1 {
+	opp-2304000000 {
+		opp-hz = /bits/ 64 <2304000000>;
+		opp-microvolt = <1030000>;
+		turbo-mode;
+	};
+	opp-2400000000 {
+		opp-hz = /bits/ 64 <2400000000>;
+		opp-microvolt = <1040000>;
+		turbo-mode;
+	};
+};
+
 &vddcpu_a {
 	regulator-min-microvolt = <680000>;
 	regulator-max-microvolt = <1040000>;

arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts +17 -0

index a198a91259ec..0c71e8bc0124 100644
@@ -13,3 +13,20 @@ / {
 	compatible = "hardkernel,odroid-n2", "amlogic,s922x", "amlogic,g12b";
 	model = "Hardkernel ODROID-N2";
 };
+
+&cpu_opp_table_0 {
+	opp-1992000000 {
+		turbo-mode;
+	};
+};
+
+&cpub_opp_table_1 {
+	opp-1908000000 {
+		turbo-mode;
+	};
+	opp-2004000000 {
+		opp-hz = /bits/ 64 <2004000000>;
+		opp-microvolt = <1022000>;
+		turbo-mode;
+	};
+};

arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2l.dts +25 -0

index e26f3e3258e1..b16a69d0cad6 100644
@@ -97,6 +97,31 @@ codec {
 	};
 };
 
+&cpu_opp_table_0 {
+	opp-1908000000 {
+		opp-hz = /bits/ 64 <1908000000>;
+		opp-microvolt = <1030000>;
+	};
+	opp-2016000000 {
+		opp-hz = /bits/ 64 <2016000000>;
+		opp-microvolt = <1040000>;
+		turbo-mode;
+	};
+};
+
+&cpub_opp_table_1 {
+	opp-2304000000 {
+		opp-hz = /bits/ 64 <2304000000>;
+		opp-microvolt = <1030000>;
+		turbo-mode;
+	};
+	opp-2400000000 {
+		opp-hz = /bits/ 64 <2400000000>;
+		opp-microvolt = <1040000>;
+		turbo-mode;
+	};
+};
+
 &eth_phy {
 	status = "disabled";
 };

Patch title is too long - checkpatch.pl should have given a you warning for this.

Not sure it is wise support overclocking directly in mainline, not by default at least. Maybe as an overlay ? even this I'm not too sure.