[PATCH 2/3] arm64: dts: imx8m: Add ddr-pmu nodes

[Leonard Crestez <leonard.crestez@xxxxxxx>]

The same ddr perfomance counter IP from 8qxp is also available on imx8m
series so add it to dts.

Tested with `perf stat` and `memtester` on imx8mm-evk and obtained
plausible results.

Signed-off-by: Leonard Crestez <leonard.crestez@xxxxxxx>
---
 arch/arm64/boot/dts/freescale/imx8mm.dtsi | 7 +++++++
 arch/arm64/boot/dts/freescale/imx8mq.dtsi | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index 232a7412755a..9a8d8cd21ef0 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -816,7 +816,14 @@
 			      <0x38880000 0xc0000>; /* GICR (RD_base + SGI_base) */
 			#interrupt-cells = <3>;
 			interrupt-controller;
 			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
 		};
+
+		ddr-pmu@3d800000 {
+			compatible = "fsl,imx8mm-ddr-pmu", "fsl,imx8m-ddr-pmu";
+			reg = <0x3d800000 0x400000>;
+			interrupt-parent = <&gic>;
+			interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
+		};
 	};
 };
diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index d09b808eff87..fb0fdee5f889 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -1031,7 +1031,14 @@
 			#interrupt-cells = <3>;
 			interrupt-controller;
 			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-parent = <&gic>;
 		};
+
+		ddr-pmu@3d800000 {
+			compatible = "fsl,imx8mq-ddr-pmu", "fsl,imx8m-ddr-pmu";
+			reg = <0x3d800000 0x400000>;
+			interrupt-parent = <&gic>;
+			interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
+		};
 	};
 };
-- 
2.17.1