1 Qualcomm RPM GLINK binding
3 This binding describes the Qualcomm RPM GLINK, a fifo based mechanism for
4 communication with the Resource Power Management system on various Qualcomm
9 Value type: <stringlist>
10 Definition: must be "qcom,glink-rpm"
14 Value type: <prop-encoded-array>
15 Definition: should specify the IRQ used by the remote processor to
16 signal this processor about communication related events
20 Value type: <prop-encoded-array>
21 Definition: handle to RPM message memory resource
25 Value type: <prop-encoded-array>
26 Definition: reference to the "rpm_hlos" mailbox in APCS, as described
27 in mailbox/mailbox.txt
30 Each subnode of the GLINK node represent function tied to a virtual
31 communication channel. The name of the nodes are not important. The properties
32 of these nodes are defined by the individual bindings for the specific function
33 - but must contain the following property:
35 - qcom,glink-channels:
37 Value type: <stringlist>
38 Definition: a list of channels tied to this function, used for matching
39 the function to a set of virtual channels
42 The following example represents the GLINK RPM node on a MSM8996 device, with
43 the function for the "rpm_request" channel defined, which is used for
44 regualtors and root clocks.
46 apcs_glb: mailbox@9820000 {
47 compatible = "qcom,msm8996-apcs-hmss-global";
48 reg = <0x9820000 0x1000>;
53 rpm_msg_ram: memory@68000 {
54 compatible = "qcom,rpm-msg-ram";
55 reg = <0x68000 0x6000>;
59 compatible = "qcom,glink-rpm";
61 interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
63 qcom,rpm-msg-ram = <&rpm_msg_ram>;
65 mboxes = <&apcs_glb 0>;
68 compatible = "qcom,rpm-msm8996";
69 qcom,glink-channels = "rpm_requests";