arm64: dts: imx8m: Add ddr controller nodes

This is used by the imx-ddrc devfreq driver to implement dynamic
frequency scaling of DRAM.

Support for proactive scaling via interconnect will come later. The
high-performance bus masters which need that (display, vpu, gpu) are
mostly not yet enabled in upstream anyway.
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mm-evk.dts

@@ -77,6 +77,26 @@ &A53_0 {
 	cpu-supply = <&buck2_reg>;
 };
 
+&ddrc {
+	operating-points-v2 = <&ddrc_opp_table>;
+
+	ddrc_opp_table: opp-table {
+		compatible = "operating-points-v2";
+
+		opp-25M {
+			opp-hz = /bits/ 64 <25000000>;
+		};
+
+		opp-100M {
+			opp-hz = /bits/ 64 <100000000>;
+		};
+
+		opp-750M {
+			opp-hz = /bits/ 64 <750000000>;
+		};
+	};
+};
+
 &fec1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_fec1>;

arch/arm64/boot/dts/freescale/imx8mm.dtsi

@@ -858,6 +858,16 @@ gic: interrupt-controller@38800000 {
 			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
+		ddrc: memory-controller@3d400000 {
+			compatible = "fsl,imx8mm-ddrc", "fsl,imx8m-ddrc";
+			reg = <0x3d400000 0x400000>;
+			clock-names = "core", "pll", "alt", "apb";
+			clocks = <&clk IMX8MM_CLK_DRAM_CORE>,
+				 <&clk IMX8MM_DRAM_PLL>,
+				 <&clk IMX8MM_CLK_DRAM_ALT>,
+				 <&clk IMX8MM_CLK_DRAM_APB>;
+		};
+
 		ddr-pmu@3d800000 {
 			compatible = "fsl,imx8mm-ddr-pmu", "fsl,imx8m-ddr-pmu";
 			reg = <0x3d800000 0x400000>;

arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts

@@ -17,6 +17,26 @@ &A53_0 {
 	cpu-supply = <&buck2_reg>;
 };
 
+&ddrc {
+	operating-points-v2 = <&ddrc_opp_table>;
+
+	ddrc_opp_table: opp-table {
+		compatible = "operating-points-v2";
+
+		opp-25M {
+			opp-hz = /bits/ 64 <25000000>;
+		};
+
+		opp-100M {
+			opp-hz = /bits/ 64 <100000000>;
+		};
+
+		opp-600M {
+			opp-hz = /bits/ 64 <600000000>;
+		};
+	};
+};
+
 &i2c1 {
 	pmic@4b {
 		compatible = "rohm,bd71847";

arch/arm64/boot/dts/freescale/imx8mn.dtsi

@@ -759,6 +759,16 @@ gic: interrupt-controller@38800000 {
 			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
+		ddrc: memory-controller@3d400000 {
+			compatible = "fsl,imx8mn-ddrc", "fsl,imx8m-ddrc";
+			reg = <0x3d400000 0x400000>;
+			clock-names = "core", "pll", "alt", "apb";
+			clocks = <&clk IMX8MN_CLK_DRAM_CORE>,
+				 <&clk IMX8MN_DRAM_PLL>,
+				 <&clk IMX8MN_CLK_DRAM_ALT>,
+				 <&clk IMX8MN_CLK_DRAM_APB>;
+		};
+
 		ddr-pmu@3d800000 {
 			compatible = "fsl,imx8mn-ddr-pmu", "fsl,imx8m-ddr-pmu";
 			reg = <0x3d800000 0x400000>;

arch/arm64/boot/dts/freescale/imx8mq-evk.dts

@@ -105,6 +105,33 @@ &A53_3 {
 	cpu-supply = <&buck2_reg>;
 };
 
+&ddrc {
+	operating-points-v2 = <&ddrc_opp_table>;
+
+	ddrc_opp_table: opp-table {
+		compatible = "operating-points-v2";
+
+		opp-25M {
+			opp-hz = /bits/ 64 <25000000>;
+		};
+
+		opp-100M {
+			opp-hz = /bits/ 64 <100000000>;
+		};
+
+		/*
+		 * On imx8mq B0 PLL can't be bypassed so low bus is 166M
+		 */
+		opp-166M {
+			opp-hz = /bits/ 64 <166935483>;
+		};
+
+		opp-800M {
+			opp-hz = /bits/ 64 <800000000>;
+		};
+	};
+};
+
 &fec1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_fec1>;

arch/arm64/boot/dts/freescale/imx8mq.dtsi

@@ -1113,6 +1113,16 @@ gic: interrupt-controller@38800000 {
 			interrupt-parent = <&gic>;
 		};
 
+		ddrc: memory-controller@3d400000 {
+			compatible = "fsl,imx8mq-ddrc", "fsl,imx8m-ddrc";
+			reg = <0x3d400000 0x400000>;
+			clock-names = "core", "pll", "alt", "apb";
+			clocks = <&clk IMX8MQ_CLK_DRAM_CORE>,
+				 <&clk IMX8MQ_DRAM_PLL_OUT>,
+				 <&clk IMX8MQ_CLK_DRAM_ALT>,
+				 <&clk IMX8MQ_CLK_DRAM_APB>;
+		};
+
 		ddr-pmu@3d800000 {
 			compatible = "fsl,imx8mq-ddr-pmu", "fsl,imx8m-ddr-pmu";
 			reg = <0x3d800000 0x400000>;