Commit 2501ec14 authored by Bjorn Andersson's avatar Bjorn Andersson Committed by Andy Gross

dt-binding: soc: qcom: Add binding for rmtfs memory

This adds the binding for describing shared memory used to exchange file
system blocks between the RMTFS client and service. A client for this is
generally found in the modem firmware and is used for accessing
persistent storage for things such as radio calibration.
Acked-by: Rob Herring's avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: default avatarAndy Gross <andy.gross@linaro.org>
parent eb297bc7
Qualcomm Remote File System Memory binding
This binding describes the Qualcomm remote filesystem memory, which serves the
purpose of describing the shared memory region used for remote processors to
access block device data using the Remote Filesystem protocol.
- compatible:
Usage: required
Value type: <stringlist>
Definition: must be:
"qcom,rmtfs-mem"
- reg:
Usage: required for static allocation
Value type: <prop-encoded-array>
Definition: must specify base address and size of the memory region,
as described in reserved-memory.txt
- size:
Usage: required for dynamic allocation
Value type: <prop-encoded-array>
Definition: must specify a size of the memory region, as described in
reserved-memory.txt
- qcom,client-id:
Usage: required
Value type: <u32>
Definition: identifier of the client to use this region for buffers.
- qcom,vmid:
Usage: optional
Value type: <u32>
Definition: vmid of the remote processor, to set up memory protection.
= EXAMPLE
The following example shows the remote filesystem memory setup for APQ8016,
with the rmtfs region for the Hexagon DSP (id #1) located at 0x86700000.
reserved-memory {
#address-cells = <2>;
#size-cells = <2>;
ranges;
rmtfs@86700000 {
compatible = "qcom,rmtfs-mem";
reg = <0x0 0x86700000 0x0 0xe0000>;
no-map;
qcom,client-id = <1>;
};
};
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