On Mon, Jan 14, 2019 at 07:41:08PM +0000, Srinivas Kandagatla wrote:
> The FastRPC driver implements an IPC (Inter-Processor Communication)
> mechanism that allows for clients to transparently make remote method
> invocations across DSP and APPS boundaries. This enables developers
> to offload tasks to the DSP and free up the application processor for
> other tasks.
>
> Co-developed-by: Thierry Escande <[email protected]>
> Signed-off-by: Thierry Escande <[email protected]>
> Signed-off-by: Srinivas Kandagatla <[email protected]>
> ---
> .../devicetree/bindings/misc/qcom,fastrpc.txt | 84 +++++++++++++++++++
> 1 file changed, 84 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/misc/qcom,fastrpc.txt
>
> diff --git a/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt
> b/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt
> new file mode 100644
> index 000000000000..004e636b4133
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt
> @@ -0,0 +1,84 @@
> +Qualcomm Technologies, Inc. FastRPC Driver
> +
> +The FastRPC driver implements an IPC (Inter-Processor Communication)
driver or this is a h/w block?
> +mechanism that allows for clients to transparently make remote method
> +invocations across DSP and APPS boundaries. This enables developers
> +to offload tasks to the DSP and free up the application processor for
> +other tasks.
> +
> +- compatible:
> + Usage: required
> + Value type: <stringlist>
> + Definition: must be "qcom,fastrpc"
> +
> +- label
> + Usage: required
> + Value type: <string>
> + Definition: should specify the dsp domain name this fastrpc
> + corresponds to. must be one of this: "adsp", "mdsp", "sdsp", "cdsp"
> +
> +- #address-cells
> + Usage: required
> + Value type: <u32>
> + Definition: Must be 1
> +
> +- #size-cells
> + Usage: required
> + Value type: <u32>
> + Definition: Must be 0
> +
> += COMPUTE BANKS
> +Each subnode of the Fastrpc node represents compute context banks available
> +on the dsp. The name of the nodes are not important. The properties of these
Please specify what the node names are.
> +nodes are defined by the individual bindings for the specific service
> +- All Compute context banks MUST contain the following property:
> +
> +- compatible:
> + Usage: required
> + Value type: <stringlist>
> + Definition: must be "qcom,fastrpc-compute-cb"
> +
> +- reg
> + Usage: required
> + Value type: <u32>
> + Definition: Context Bank ID.
> +
> +- secured:
> + Usage: Optional
> + Value type: <boolean>
> + Defination: Indicating context bank is secured
What does 'secured' mean here?
> +
> +- nsessions:
> + Usage: Optional
> + Value type: <u32>
> + Defination: A value indicating how many sessions can share this
> + context bank. Defaults to 1 when this property
> + is not specified.
Needs a vendor prefix.
> +
> +Example:
> +
> +adsp-pil {
> + compatible = "qcom,msm8996-adsp-pil";
> + ...
> + smd-edge {
> + label = "lpass";
> + fastrpc {
> + compatible = "qcom,fastrpc";
> + qcom,smd-channels = "fastrpcsmd-apps-dsp";
> + lable = "adsp";
typo.
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + cb@1 {
> + compatible = "qcom,fastrpc-compute-cb";
> + reg = <1>;
> + };
> +
> + cb@2 {
> + compatible = "qcom,fastrpc-compute-cb";
> + reg = <2>;
> + };
> + ...
> + };
> + };
> +};
> --
> 2.20.1
>
