[PATCH v7 3/9] dt-bindings: perf: hisi: Add Devicetree bindings for Hisilicon SoC PMU

Anurup M anurupvasu at gmail.com
Tue Apr 4 03:55:33 PDT 2017


1) Device tree bindings for Hisilicon SoC PMU.
2) Add example for Hisilicon L3 cache and MN PMU.
3) Add child nodes of L3C and MN in djtag bindings example.

Signed-off-by: Anurup M <anurup.m at huawei.com>
Signed-off-by: Shaokun Zhang <zhangshaokun at hisilicon.com>
---
 .../devicetree/bindings/arm/hisilicon/djtag.txt    | 29 +++++++
 .../devicetree/bindings/arm/hisilicon/pmu.txt      | 93 ++++++++++++++++++++++
 2 files changed, 122 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/hisilicon/pmu.txt

diff --git a/Documentation/devicetree/bindings/arm/hisilicon/djtag.txt b/Documentation/devicetree/bindings/arm/hisilicon/djtag.txt
index fde5bab..27e67cc 100644
--- a/Documentation/devicetree/bindings/arm/hisilicon/djtag.txt
+++ b/Documentation/devicetree/bindings/arm/hisilicon/djtag.txt
@@ -27,6 +27,35 @@ Example 1: Djtag for CPU die in HiP07
 		hisilicon,scl-id = <0x03>;
 
 		/* All connecting components will appear as child nodes */
+
+		pmul3c0 {
+			compatible = "hisilicon,hip07-pmu-l3c-v2";
+			hisilicon,module-id = <0x01>;
+			hisilicon,instance-id = <0x01>;
+		};
+
+		pmul3c1 {
+			compatible = "hisilicon,hip07-pmu-l3c-v2";
+			hisilicon,module-id = <0x02>;
+			hisilicon,instance-id = <0x01>;
+		};
+
+		pmul3c2 {
+			compatible = "hisilicon,hip07-pmu-l3c-v2";
+			hisilicon,module-id = <0x03>;
+			hisilicon,instance-id = <0x01>;
+		};
+
+		pmul3c3 {
+			compatible = "hisilicon,hip07-pmu-l3c-v2";
+			hisilicon,module-id = <0x04>;
+			hisilicon,instance-id = <0x01>;
+		};
+
+		pmumn0 {
+			compatible = "hisilicon,hip07-pmu-mn-v2";
+			hisilicon,module-id = <0x21>;
+		};
 	};
 
 Hisilicon HiP05/06/07 djtag for IO die
diff --git a/Documentation/devicetree/bindings/arm/hisilicon/pmu.txt b/Documentation/devicetree/bindings/arm/hisilicon/pmu.txt
new file mode 100644
index 0000000..488e740
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/hisilicon/pmu.txt
@@ -0,0 +1,93 @@
+Hisilicon SoC HiP05/06/07 ARMv8 PMU
+===================================
+
+The Hisilicon SoC chips like HiP05/06/07 etc. consist of various independent
+system device PMUs such as L3 cache (L3C) and Miscellaneous Nodes(MN). These
+PMU devices are independent and have hardware logic to gather statistics and
+performance information.
+
+HiSilicon SoC chip is encapsulated by multiple CPU and IO dies. The CPU die
+is called as Super CPU cluster (SCCL) which includes 16 cpu-cores. Every SCCL
+in HiP05/06/07 chips are further grouped as CPU clusters (CCL) which includes
+4 cpu-cores each.
+e.g. In the case of HiP05/06/07, each SCCL has 1 L3 cache and 1 MN PMU device.
+The L3 cache is further grouped as 4 L3 cache banks in a SCCL.
+
+The Hisilicon SoC PMU DT node bindings for uncore PMU devices are as below.
+For PMU devices like L3 cache. MN etc. which are accessed using the djtag,
+the parent node will be the djtag node of the corresponding CPU die (SCCL).
+
+L3 cache
+---------
+The L3 cache is dedicated for each SCCL. Each SCCL in HiP05/06/07 chips have 4
+L3 cache banks. Each L3 cache bank have separate DT nodes.
+
+Required properties:
+
+	- compatible : This value should be as follows
+		(a) "hisilicon,hip05-pmu-l3c-v1" for v1 hw in HiP05 chipset
+		(b) "hisilicon,hip06-pmu-l3c-v1" for v1 hw in HiP06 chipset
+		(c) "hisilicon,hip07-pmu-l3c-v2" for v2 hw in HiP07 chipset
+
+	- hisilicon,module-id : This property is the module identifier for djtag.
+		In v1 hw, this value is 0x04 for all L3 cache instances. But
+		in v2 hw, this value is unique for each L3 cache instance.
+
+	- hisilicon,instance-id : This property will identify the L3 cache instance
+		or bank in djtag. In v1 hw, this value is unique for each L3 cache
+		instance. But in v2 hw, it is 0x01 for all L3 cache instances.
+
+	*The counter overflow IRQ is not supported in v1, v2 hardware (HiP05/06/07).
+
+Miscellaneous Node
+------------------
+The MN is dedicated for each SCCL and hence there are separate DT nodes for MN
+for each SCCL.
+
+Required properties:
+
+	- compatible : This value should be as follows
+		(a) "hisilicon,hip05-pmu-mn-v1" for v1 hw in HiP05 chipset
+		(b) "hisilicon,hip06-pmu-mn-v1" for v1 hw in HiP06 chipset
+		(c) "hisilicon,hip07-pmu-mn-v2" for v2 hw in HiP07 chipset
+
+	- hisilicon,module-id : Module ID to input for djtag.
+
+	*The counter overflow IRQ is not supported in v1, v2 hardware (HiP05/06/07).
+
+Example:
+
+	djtag0: djtag at 60010000 {
+		compatible = "hisilicon,hip07-cpu-djtag-v2";
+		reg = <0x0 0x60010000 0x0 0x10000>;
+		hisilicon,scl-id = <0x03>;
+
+		pmul3c0 {
+			compatible = "hisilicon,hip07-pmu-l3c-v2";
+			hisilicon,module-id = <0x01>;
+			hisilicon,instance-id = <0x01>;
+		};
+
+		pmul3c1 {
+			compatible = "hisilicon,hip07-pmu-l3c-v2";
+			hisilicon,module-id = <0x02>;
+			hisilicon,instance-id = <0x01>;
+		};
+
+		pmul3c2 {
+			compatible = "hisilicon,hip07-pmu-l3c-v2";
+			hisilicon,module-id = <0x03>;
+			hisilicon,instance-id = <0x01>;
+		};
+
+		pmul3c3 {
+			compatible = "hisilicon,hip07-pmu-l3c-v2";
+			hisilicon,module-id = <0x04>;
+			hisilicon,instance-id = <0x01>;
+		};
+
+		pmumn0 {
+			compatible = "hisilicon,hip07-pmu-mn-v2";
+			hisilicon,module-id = <0x21>;
+		};
+	};
-- 
2.1.4




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