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dt-bindings: soc: qcom: Introduce Glink Probe bindings

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The RPMSG over GLINK transport expects to be a subdev in a remote proc
node. This driver helps probe the glink transports when remote proc is
disabled.

Change-Id: I2b29ad88d347321434470c1d0db365bccc4f1e92
This commit is contained in:
Chris Lew
2019-08-06 15:59:19 -07:00
parent 5882ad3c36
commit f5178fe3dd
1 changed files with 69 additions and 0 deletions
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bindings/soc/qcom/qcom,glink-probe.txt Normal file
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Qualcomm Technologies, Inc. GLINK Probe
This binding describes the GLINK Probe driver, a device
that initializes the GLINK edge pairs within the system.
- compatible :
Usage: required
Value type: <stringlist>
Definition: must be "qcom,glink"
= SUBNODES
The GLINK probe node must contain subnodes that describes the
edge-pairs. See qcom,glink.txt for details on how to describe them.
In addition to the properties in qcom,glink.txt, The GLINK Probe driver
requires the qcom,glink-label and transport type to be specified in the
subnodes.
- transport :
Usage: required
Value type: <stringlist>
Definition: must be "smem", "spss", or "spi"
- qcom,glink-label :
Usage: required
Value type: <stringlist>
Definition: specifies the identifier of the remote proc of this edge.
= GLINK_SSR
The GLINK probe driver also initializes the GLINK_SSR channel for the edges
that it brings up. The channel should be specified as a subnode to each edge. In
addition to the properties in qcom,glink.txt to specify a channel device node,
the qcom,notify-edges property must be defined.
- qcom,notify-edges :
Usage: required
Value type: <prop-encoded-array>
Definition: list of phandles that specify the subsystems this glink edge
needs to receive ssr notifications about.
= EXAMPLE
qcom,glink {
compatible = "qcom,glink";
glink_modem: modem {
transport = "smem";
qcom,remote-pid = <0>;
mboxes = <&apcs_glb 8>;
mbox-names = "mpss_smem";
interrupts = <GIC_SPI 449 IRQ_TYPE_EDGE_RISING>;
qcom,modem_glink_ssr {
qcom,glink-channels = "glink_ssr";
qcom,notify-edges = <&glink_adsp>;
};
};
glink_adsp: adsp {
transport = "smem";
qcom,remote-pid = <2>;
mboxes = <&apcs_glb 4>;
mbox-names = "adsp_smem";
interrupts = <GIC_SPI 348 IRQ_TYPE_EDGE_RISING>;
qcom,modem_glink_ssr {
qcom,glink-channels = "glink_ssr";
qcom,notify-edges = <&glink_modem>;
};
};
};