Documentation/devicetree/bindings/firmware/qcom,scm.txt

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