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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 4/5] dt-bindings: csky: Add csky PMU bindings
Date: Wed, 22 May 2019 17:25:31 +0800	[thread overview]
Message-ID: <2e6e6d4b8f002900a3872105a9284d7dd562c82b.1558516765.git.han_mao@c-sky.com> (raw)
In-Reply-To: <cover.1558516765.git.han_mao@c-sky.com>
In-Reply-To: <cover.1558516765.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


  parent reply	other threads:[~2019-05-22  9:26 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-22  9:25 [PATCH 0/5] Add pmu hardware sampling support Mao Han
2019-05-22  9:25 ` [PATCH 1/5] csky: Init pmu as a device Mao Han
2019-05-22  9:25 ` [PATCH 2/5] csky: Add reg-io-width property for csky pmu Mao Han
2019-05-22  9:25 ` [PATCH 3/5] csky: Add pmu interrupt support Mao Han
2019-05-22  9:25 ` Mao Han [this message]
2019-05-22  9:25 ` [PATCH 5/5] csky: Fixup some error count in 810 & 860 Mao Han

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