From 4d581034f9086f784a3408575bdb3c201740c6cb Mon Sep 17 00:00:00 2001
From: Mao Han <han_mao@c-sky.com>
Date: Tue, 4 Jun 2019 18:54:47 +0800
Subject: [PATCH] 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>
---
.../devicetree/bindings/csky/pmu.txt | 38 +++++++++++++++++++
1 file changed, 38 insertions(+)
create mode 100644 Documentation/devicetree/bindings/csky/pmu.txt
diff --git a/Documentation/devicetree/bindings/csky/pmu.txt b/Documentation/devicetree/bindings/csky/pmu.txt
new file mode 100644
index 0000000000000..728d05ca6a1c6
--- /dev/null
+++ b/Documentation/devicetree/bindings/csky/pmu.txt
@@ -0,0 +1,38 @@
+===============================
+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>;
+ };
--
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