On Tue, Apr 10, 2018 at 1:09 PM Rishabh Bhatnagar <rishabhb@xxxxxxxxxxxxxx>
wrote:
> Documentation for last level cache controller device tree bindings,
> client bindings usage examples.
> Signed-off-by: Channagoud Kadabi <ckadabi@xxxxxxxxxxxxxx>
> Signed-off-by: Rishabh Bhatnagar <rishabhb@xxxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/arm/msm/qcom,llcc.txt | 58
++++++++++++++++++++++
> 1 file changed, 58 insertions(+)
> create mode 100644
Documentation/devicetree/bindings/arm/msm/qcom,llcc.txt
> diff --git a/Documentation/devicetree/bindings/arm/msm/qcom,llcc.txt
b/Documentation/devicetree/bindings/arm/msm/qcom,llcc.txt
> new file mode 100644
> index 0000000..497cf0f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/msm/qcom,llcc.txt
> @@ -0,0 +1,58 @@
> +== Introduction==
> +
> +LLCC (Last Level Cache Controller) provides last level of cache memory
in SOC,
> +that can be shared by multiple clients. Clients here are different cores
in the
> +SOC, the idea is to minimize the local caches at the clients and migrate
to
> +common pool of memory
> +
> +Properties:
> +- compatible:
> + Usage: required
> + Value type: <string>
> + Definition: must be "qcom,sdm845-llcc"
> +
> +- reg:
> + Usage: required
> + Value Type: <prop-encoded-array>
> + Definition: must be addresses and sizes of the LLCC registers
> +
> +- #cache-cells:
> + Usage: required
> + Value Type: <u32>
> + Definition: Number of cache cells, must be 1
> +
> +- max-slices:
> + usage: required
> + Value Type: <u32>
> + Definition: Number of cache slices supported by hardware
> +
> +Example:
> +
> + llcc: qcom,llcc@1100000 {
> + compatible = "qcom,sdm845-llcc";
> + reg = <0x1100000 0x250000>;
> + #cache-cells = <1>;
> + max-slices = <32>;
> + };
> +
> +== Client ==
> +
> +Properties:
> +- cache-slice-names:
> + Usage: required
> + Value type: <stringlist>
> + Definition: A set of names that identify the usecase names of a
> + client that uses cache slice. These strings are
> + used to look up the cache slice entries by name.
> +
> +- cache-slices:
> + Usage: required
> + Value type: <prop-encoded-array>
> + Definition: The tuple has phandle to llcc device as the first
> + argument and the second argument is the usecase
> + id of the client.
> +For Example:
> + venus {
> + cache-slice-names = "vidsc0", "vidsc1";
> + cache-slices = <&llcc VIDSC0_ID>, <&llcc VIDSC1_ID>;
My git complains about some whitespace weirdness on the line above. Other
than that:
Reviewed-by: Evan Green <evgreen@xxxxxxxxxxxx>
-Evan
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