On Jul 23, 2013, at 4:19 AM, Punit Agrawal wrote:
> The CCI PMU can profile bus transactions at the master and slave
> interfaces of the CCI. The PMU can be used to observe an aggregated view
> of the bus traffic between the various components connected to the CCI.
>
> Extend the existing CCI driver to support the PMU by registering a perf
> backend for it.
>
> Document the device tree binding to describe the CCI PMU.
>
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
> Cc: Nicolas Pitre <nico@xxxxxxxxxx>
> Cc: Dave Martin <dave.martin@xxxxxxxxxx>
> Cc: Rob Herring <rob.herring@xxxxxxxxxxx>
> Cc: Will Deacon <will.deacon@xxxxxxx>
> Signed-off-by: Punit Agrawal <punit.agrawal@xxxxxxx>
> Reviewed-by: Will Deacon <will.deacon@xxxxxxx>
> ---
> Documentation/devicetree/bindings/arm/cci.txt | 38 ++
> drivers/bus/arm-cci.c | 642 +++++++++++++++++++++++++
> 2 files changed, 680 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/arm/cci.txt b/Documentation/devicetree/bindings/arm/cci.txt
> index 92d36e2..5bc95e5 100644
> --- a/Documentation/devicetree/bindings/arm/cci.txt
> +++ b/Documentation/devicetree/bindings/arm/cci.txt
> @@ -79,6 +79,34 @@ specific to ARM.
> corresponding interface programming
> registers.
>
> + - CCI PMU node
> +
> + Node name must be "pmu".
> + 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 set to one of
> + "arm,cci-400-pmu"
> + "arm,cci-400-pmu,rev0"
> + "arm,cci-400-pmu,rev1"
Do you really mean only one? Seems like ""arm,cci-400-pmu,rev0", "arm,cci-400-pmu" would be valid.
> +
> + - reg:
> + Usage: required
> + Value type: <prop-encoded-array>
> + Definition: the base address and size of the
> + corresponding interface programming
> + registers.
> +
> + - interrupts:
> + Usage: required
> + Value type: <prop-encoded-array>
> + Definition: comma-separated list of unique PMU
> + interrupts
What is the list of interrupts related to, should there be an associated interrupts-names
> +
> * CCI interconnect bus masters
>
> Description: masters in the device tree connected to a CCI port
> @@ -163,6 +191,16 @@ Example:
> interface-type = "ace";
> reg = <0x5000 0x1000>;
> };
> +
> + pmu@9000 {
> + compatible = "arm,cci-400-pmu,rev0";
> + reg = <0x9000 0x5000>;
> + interrupts = <0 101 4>,
> + <0 102 4>,
> + <0 103 4>,
> + <0 104 4>,
> + <0 105 4>;
> + };
> };
>
[ snip ]
- k
--
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
