1*4882a593SmuzhiyunQCOM Secure Channel Manager (SCM) 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunQualcomm processors include an interface to communicate to the secure firmware. 4*4882a593SmuzhiyunThis interface allows for clients to request different types of actions. These 5*4882a593Smuzhiyuncan include CPU power up/down, HDCP requests, loading of firmware, and other 6*4882a593Smuzhiyunassorted actions. 7*4882a593Smuzhiyun 8*4882a593SmuzhiyunRequired properties: 9*4882a593Smuzhiyun- compatible: must contain one of the following: 10*4882a593Smuzhiyun * "qcom,scm-apq8064" 11*4882a593Smuzhiyun * "qcom,scm-apq8084" 12*4882a593Smuzhiyun * "qcom,scm-ipq4019" 13*4882a593Smuzhiyun * "qcom,scm-ipq806x" 14*4882a593Smuzhiyun * "qcom,scm-ipq8074" 15*4882a593Smuzhiyun * "qcom,scm-msm8660" 16*4882a593Smuzhiyun * "qcom,scm-msm8916" 17*4882a593Smuzhiyun * "qcom,scm-msm8960" 18*4882a593Smuzhiyun * "qcom,scm-msm8974" 19*4882a593Smuzhiyun * "qcom,scm-msm8994" 20*4882a593Smuzhiyun * "qcom,scm-msm8996" 21*4882a593Smuzhiyun * "qcom,scm-msm8998" 22*4882a593Smuzhiyun * "qcom,scm-sc7180" 23*4882a593Smuzhiyun * "qcom,scm-sdm845" 24*4882a593Smuzhiyun * "qcom,scm-sm8150" 25*4882a593Smuzhiyun and: 26*4882a593Smuzhiyun * "qcom,scm" 27*4882a593Smuzhiyun- clocks: Specifies clocks needed by the SCM interface, if any: 28*4882a593Smuzhiyun * core clock required for "qcom,scm-apq8064", "qcom,scm-msm8660" and 29*4882a593Smuzhiyun "qcom,scm-msm8960" 30*4882a593Smuzhiyun * core, iface and bus clocks required for "qcom,scm-apq8084", 31*4882a593Smuzhiyun "qcom,scm-msm8916" and "qcom,scm-msm8974" 32*4882a593Smuzhiyun- clock-names: Must contain "core" for the core clock, "iface" for the interface 33*4882a593Smuzhiyun clock and "bus" for the bus clock per the requirements of the compatible. 34*4882a593Smuzhiyun- qcom,dload-mode: phandle to the TCSR hardware block and offset of the 35*4882a593Smuzhiyun download mode control register (optional) 36*4882a593Smuzhiyun 37*4882a593SmuzhiyunExample for MSM8916: 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun firmware { 40*4882a593Smuzhiyun scm { 41*4882a593Smuzhiyun compatible = "qcom,msm8916", "qcom,scm"; 42*4882a593Smuzhiyun clocks = <&gcc GCC_CRYPTO_CLK> , 43*4882a593Smuzhiyun <&gcc GCC_CRYPTO_AXI_CLK>, 44*4882a593Smuzhiyun <&gcc GCC_CRYPTO_AHB_CLK>; 45*4882a593Smuzhiyun clock-names = "core", "bus", "iface"; 46*4882a593Smuzhiyun }; 47*4882a593Smuzhiyun }; 48