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-rw-r--r--Documentation/devicetree/bindings/arm/cci.txt60
1 files changed, 56 insertions, 4 deletions
diff --git a/Documentation/devicetree/bindings/arm/cci.txt b/Documentation/devicetree/bindings/arm/cci.txt
index 92d36e2aa877..f28d82bbbc56 100644
--- a/Documentation/devicetree/bindings/arm/cci.txt
+++ b/Documentation/devicetree/bindings/arm/cci.txt
@@ -36,14 +36,18 @@ specific to ARM.
- reg
Usage: required
- Value type: <prop-encoded-array>
+ Value type: Integer cells. A register entry, expressed as a pair
+ of cells, containing base and size.
Definition: A standard property. Specifies base physical
address of CCI control registers common to all
interfaces.
- ranges:
Usage: required
- Value type: <prop-encoded-array>
+ Value type: Integer cells. An array of range entries, expressed
+ as a tuple of cells, containing child address,
+ parent address and the size of the region in the
+ child address space.
Definition: A standard property. Follow rules in the ePAPR for
hierarchical bus addressing. CCI interfaces
addresses refer to the parent node addressing
@@ -74,11 +78,49 @@ specific to ARM.
- reg:
Usage: required
- Value type: <prop-encoded-array>
+ Value type: Integer cells. A register entry, expressed
+ as a pair of cells, containing base and
+ size.
Definition: the base address and size of the
corresponding interface programming
registers.
+ - CCI PMU node
+
+ Parent node must be CCI interconnect node.
+
+ A CCI pmu node must contain the following properties:
+
+ - compatible
+ Usage: required
+ Value type: <string>
+ Definition: must be "arm,cci-400-pmu"
+
+ - reg:
+ Usage: required
+ Value type: Integer cells. A register entry, expressed
+ as a pair of cells, containing base and
+ size.
+ Definition: the base address and size of the
+ corresponding interface programming
+ registers.
+
+ - interrupts:
+ Usage: required
+ Value type: Integer cells. Array of interrupt specifier
+ entries, as defined in
+ ../interrupt-controller/interrupts.txt.
+ Definition: list of counter overflow interrupts, one per
+ counter. The interrupts must be specified
+ starting with the cycle counter overflow
+ interrupt, followed by counter0 overflow
+ interrupt, counter1 overflow interrupt,...
+ ,counterN overflow interrupt.
+
+ The CCI PMU has an interrupt signal for each
+ counter. The number of interrupts must be
+ equal to the number of counters.
+
* CCI interconnect bus masters
Description: masters in the device tree connected to a CCI port
@@ -144,7 +186,7 @@ Example:
#address-cells = <1>;
#size-cells = <1>;
reg = <0x0 0x2c090000 0 0x1000>;
- ranges = <0x0 0x0 0x2c090000 0x6000>;
+ ranges = <0x0 0x0 0x2c090000 0x10000>;
cci_control0: slave-if@1000 {
compatible = "arm,cci-400-ctrl-if";
@@ -163,6 +205,16 @@ Example:
interface-type = "ace";
reg = <0x5000 0x1000>;
};
+
+ pmu@9000 {
+ compatible = "arm,cci-400-pmu";
+ reg = <0x9000 0x5000>;
+ interrupts = <0 101 4>,
+ <0 102 4>,
+ <0 103 4>,
+ <0 104 4>,
+ <0 105 4>;
+ };
};
This CCI node corresponds to a CCI component whose control registers sits