Reviewed-by: Guo Ren <ren_...@c-sky.com>
On Tue, Jun 4, 2019 at 10:25 AM Mao Han <han_...@c-sky.com> wrote:
>
> This patch adds the documentation to describe that how to add pmu node in
> dts.
>
> Signed-off-by: Mao Han <han_...@c-sky.com>
> Cc: Rob Herring <robh...@kernel.org>
> Cc: Guo Ren <guo...@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..53c3b0a
> --- /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
> + - count-width
> + Usage: optional
> + Value type: <u32>
> + Definition: the width of pmu counter
> +
> +Examples:
> +---------
> +
> + pmu {
> + compatible = "csky,csky-pmu";
> + interrupts = <0x17 IRQ_TYPE_EDGE_RISING>;
> + interrupt-parent = <&intc>;
> + count-width = <0x30>;
> + };
> +
> --
> 2.7.4
>
