linux-kernel - [PATCH v2] add pmu to amlogic meson sm1

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Message-Id: <20220206144343.2194-1-crawford.benjamin15@gmail.com>
Date:   Sun,  6 Feb 2022 14:43:43 +0000
From:   Benjamin Mordaunt <crawford.benjamin15@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     Benjamin Mordaunt <crawford.benjamin15@...il.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] add pmu to amlogic meson sm1

---
The dts for meson sm1 appears to omit the SoC's PMU,
which is essential for accessing perf events regarding
e.g. cache on e.g. the Odroid C4 platform. Add it.

 arch/arm64/boot/dts/amlogic/meson-sm1.dtsi | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi b/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
index 3d8b1f4f2..4147eecd2 100644
--- a/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
@@ -6,6 +6,8 @@
 
 #include "meson-g12-common.dtsi"
 #include <dt-bindings/clock/axg-audio-clkc.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/power/meson-sm1-power.h>
 #include <dt-bindings/reset/amlogic,meson-axg-audio-arb.h>
 #include <dt-bindings/reset/amlogic,meson-g12a-audio-reset.h>
@@ -90,7 +92,16 @@ l2: l2-cache0 {
 			compatible = "cache";
 		};
 	};
-
+	
+	arm-pmu {
+		compatible = "arm,cortex-a55-pmu";
+		interrupts = <GIC_SPI 137 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-affinity = <&cpu0>, <&cpu1>, <&cpu2>, <&cpu3>;
+	};
+	
 	cpu_opp_table: opp-table {
 		compatible = "operating-points-v2";
 		opp-shared;
-- 
2.34.1