ARM: dts: imx7: add CPU PMU support

Enable support for ARM Performance Monitoring Units available
on the Cortex-A7 CPU. There is only a single interrupt for the
PMU in both variants of the family, i.MX 7Solo and 7Dual.

Tested with perf on a i.MX 7Dual:
  hw perfevents: enabled with armv7_cortex_a7 PMU driver, 5 counters available

Signed-off-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi
index ec6292c5b2e475c89e44d243b701f3065ab441e0..6401b08d803eb1e58793a020a2f8c282a9f43e91 100644 (file)
--- a/arch/arm/boot/dts/imx7s.dtsi
+++ b/arch/arm/boot/dts/imx7s.dtsi
@@ -130,6 +130,12 @@
                #phy-cells = <0>;
        };
 
+       pmu {
+               compatible = "arm,cortex-a7-pmu";
+               interrupt-parent = <&gpc>;
+               interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>;
+               interrupt-affinity = <&cpu0>;
+       };
 
        replicator {
                /*