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authorMao Han <han_mao@c-sky.com>2019-06-04 13:54:47 +0300
committerGuo Ren <ren_guo@c-sky.com>2019-07-19 09:21:36 +0300
commit4d581034f9086f784a3408575bdb3c201740c6cb (patch)
tree089369f5ab23626a0aa450303c5e43c2da115e3f /Documentation
parent69d812f5eb249bf30069f81dd508aa4548ec6eb1 (diff)
downloadlinux-4d581034f9086f784a3408575bdb3c201740c6cb.tar.xz
dt-bindings: csky: Add csky PMU bindings
This patch adds the documentation to describe that how to add pmu node in dts. Signed-off-by: Mao Han <han_mao@c-sky.com> Signed-off-by: Guo Ren <guoren@kernel.org> Cc: Rob Herring <robh+dt@kernel.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/csky/pmu.txt38
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diff --git a/Documentation/devicetree/bindings/csky/pmu.txt b/Documentation/devicetree/bindings/csky/pmu.txt
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+===============================
+C-SKY Performance Monitor Units
+===============================
+
+C-SKY Performance Monitor is designed for ck807/ck810/ck860 SMP soc and
+it could count cpu's events for helping analysis performance issues.
+
+============================
+PMU node bindings definition
+============================
+
+ Description: Describes PMU
+
+ PROPERTIES
+
+ - compatible
+ Usage: required
+ Value type: <string>
+ Definition: must be "csky,csky-pmu"
+ - interrupts
+ Usage: required
+ Value type: <u32 IRQ_TYPE_XXX>
+ Definition: must be pmu irq num defined by soc
+ - count-width
+ Usage: optional
+ Value type: <u32>
+ Definition: the width of pmu counter
+
+Examples:
+---------
+#include <dt-bindings/interrupt-controller/irq.h>
+
+ pmu: performace-monitor {
+ compatible = "csky,csky-pmu";
+ interrupts = <23 IRQ_TYPE_EDGE_RISING>;
+ interrupt-parent = <&intc>;
+ count-width = <48>;
+ };