From: Mao Han <han_mao@c-sky.com>
To: linux-kernel@vger.kernel.org
Cc: Mao Han <han_mao@c-sky.com>, Rob Herring <robh+dt@kernel.org>,
Guo Ren <guoren@kernel.org>,
linux-csky@vger.kernel.org
Subject: [PATCH V2 4/5] dt-bindings: csky: Add csky PMU bindings
Date: Mon, 27 May 2019 14:57:20 +0800 [thread overview]
Message-ID: <bb2ba724313959f62fd7968164ca12e8fcf7f242.1558939831.git.han_mao@c-sky.com> (raw)
In-Reply-To: <cover.1558939831.git.han_mao@c-sky.com>
In-Reply-To: <cover.1558939831.git.han_mao@c-sky.com>
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>
CC: Rob Herring <robh+dt@kernel.org>
CC: Guo Ren <guoren@kernel.org>
CC: linux-csky@vger.kernel.org
---
Documentation/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 0000000..6d3cba3
--- /dev/null
+++ b/Documentation/devicetree/bindings/csky/pmu.txt
@@ -0,0 +1,38 @@
+============================
+C-SKY Performance Monitor Units
+============================
+
+C-SKY 8xx series cores often have a PMU for counting cpu and cache events.
+The C-SKY PMU representation in the device tree should be done as under:
+
+==============================
+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>
+ Definition: must be pmu irq num defined by soc
+ - reg-io-width
+ Usage: optional
+ Value type: <u32>
+ Definition: the width of pmu counter
+
+Examples:
+---------
+
+ pmu {
+ compatible = "csky,csky-pmu";
+ interrupts = <0x17>;
+ interrupt-parent = <&intc>;
+ reg-io-width = <0x30>;
+ };
+
--
2.7.4
next prev parent reply other threads:[~2019-05-27 6:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-27 6:57 [PATCH V2 0/5] csky: Add pmu hardware sampling support Mao Han
2019-05-27 6:57 ` [PATCH V2 1/5] csky: Init pmu as a device Mao Han
2019-05-27 6:57 ` [PATCH V2 2/5] csky: Add reg-io-width property for csky pmu Mao Han
2019-05-27 6:57 ` [PATCH V2 3/5] csky: Add pmu interrupt support Mao Han
2019-05-27 6:57 ` Mao Han [this message]
2019-05-27 6:57 ` [PATCH V2 5/5] csky: Fixup some error count in 810 & 860 Mao Han
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