tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1Binding for the Qualcomm APCS global block
2==========================================
3
4This binding describes the APCS "global" block found in various Qualcomm
5platforms.
6
7- compatible:
8 Usage: required
9 Value type: <string>
10 Definition: must be one of:
11 "qcom,msm8916-apcs-kpss-global",
12 "qcom,msm8996-apcs-hmss-global"
13 "qcom,msm8998-apcs-hmss-global"
14 "qcom,qcs404-apcs-apps-global"
15 "qcom,sc7180-apss-shared"
16 "qcom,sdm845-apss-shared"
17 "qcom,sm8150-apss-shared"
18 "qcom,ipq8074-apcs-apps-global"
19
20- reg:
21 Usage: required
22 Value type: <prop-encoded-array>
23 Definition: must specify the base address and size of the global block
24- clocks:
25 Usage: required if #clocks-cells property is present
26 Value type: <phandle>
27 Definition: phandle to the input PLL, which feeds the APCS mux/divider
28
29- #mbox-cells:
30 Usage: required
31 Value type: <u32>
32 Definition: as described in mailbox.txt, must be 1
33
34- #clock-cells:
35 Usage: optional
36 Value type: <u32>
37 Definition: as described in clock.txt, must be 0
38
39
40= EXAMPLE
41The following example describes the APCS HMSS found in MSM8996 and part of the
42GLINK RPM referencing the "rpm_hlos" doorbell therein.
43
44 apcs_glb: mailbox@9820000 {
45 compatible = "qcom,msm8996-apcs-hmss-global";
46 reg = <0x9820000 0x1000>;
47
48 #mbox-cells = <1>;
49 };
50
51 rpm-glink {
52 compatible = "qcom,glink-rpm";
53
54 interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
55
56 qcom,rpm-msg-ram = <&rpm_msg_ram>;
57
58 mboxes = <&apcs_glb 0>;
59 mbox-names = "rpm_hlos";
60 };
61
62Below is another example of the APCS binding on MSM8916 platforms:
63
64 apcs: mailbox@b011000 {
65 compatible = "qcom,msm8916-apcs-kpss-global";
66 reg = <0xb011000 0x1000>;
67 #mbox-cells = <1>;
68 clocks = <&a53pll>;
69 #clock-cells = <0>;
70 };