1QCOM Secure Channel Manager (SCM)
2
3Qualcomm processors include an interface to communicate to the secure firmware.
4This interface allows for clients to request different types of actions.  These
5can include CPU power up/down, HDCP requests, loading of firmware, and other
6assorted actions.
7
8Required properties:
9- compatible: must contain one of the following:
10 * "qcom,scm-apq8064"
11 * "qcom,scm-apq8084"
12 * "qcom,scm-ipq4019"
13 * "qcom,scm-ipq806x"
14 * "qcom,scm-ipq8074"
15 * "qcom,scm-mdm9607"
16 * "qcom,scm-msm8226"
17 * "qcom,scm-msm8660"
18 * "qcom,scm-msm8916"
19 * "qcom,scm-msm8953"
20 * "qcom,scm-msm8960"
21 * "qcom,scm-msm8974"
22 * "qcom,scm-msm8994"
23 * "qcom,scm-msm8996"
24 * "qcom,scm-msm8998"
25 * "qcom,scm-sc7180"
26 * "qcom,scm-sc7280"
27 * "qcom,scm-sdm845"
28 * "qcom,scm-sdx55"
29 * "qcom,scm-sm8150"
30 * "qcom,scm-sm8250"
31 * "qcom,scm-sm8350"
32 and:
33 * "qcom,scm"
34- clocks: Specifies clocks needed by the SCM interface, if any:
35 * core clock required for "qcom,scm-apq8064", "qcom,scm-msm8660" and
36   "qcom,scm-msm8960"
37 * core, iface and bus clocks required for "qcom,scm-apq8084",
38   "qcom,scm-msm8916", "qcom,scm-msm8953" and "qcom,scm-msm8974"
39- clock-names: Must contain "core" for the core clock, "iface" for the interface
40  clock and "bus" for the bus clock per the requirements of the compatible.
41- qcom,dload-mode: phandle to the TCSR hardware block and offset of the
42		   download mode control register (optional)
43
44Example for MSM8916:
45
46	firmware {
47		scm {
48			compatible = "qcom,msm8916", "qcom,scm";
49			clocks = <&gcc GCC_CRYPTO_CLK> ,
50				 <&gcc GCC_CRYPTO_AXI_CLK>,
51				 <&gcc GCC_CRYPTO_AHB_CLK>;
52			clock-names = "core", "bus", "iface";
53		};
54	};
55