ti,sci.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/arm/keystone/ti,sci.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: TI-SCI controller device node bindings
    8 
    9 maintainers:
   10   - Nishanth Menon <nm@ti.com>
   11 
   12 description: |
   13   Texas Instrument's processors including those belonging to Keystone generation
   14   of processors have separate hardware entity which is now responsible for the
   15   management of the System on Chip (SoC) system. These include various system
   16   level functions as well.
   17 
   18   An example of such an SoC is K2G, which contains the system control hardware
   19   block called Power Management Micro Controller (PMMC). This hardware block is
   20   initialized early into boot process and provides services to Operating Systems
   21   on multiple processors including ones running Linux.
   22 
   23   See http://processors.wiki.ti.com/index.php/TISCI for protocol definition.
   24 
   25   The TI-SCI node describes the Texas Instrument's System Controller entity node.
   26   This parent node may optionally have additional children nodes which describe
   27   specific functionality such as clocks, power domain, reset or additional
   28   functionality as may be required for the SoC. This hierarchy also describes the
   29   relationship between the TI-SCI parent node to the child node.
   30 
   31 properties:
   32   $nodename:
   33     pattern: "^system-controller@[0-9a-f]+$"
   34 
   35   compatible:
   36     oneOf:
   37       - description: System controller on TI 66AK2G SoC and other K3 SoCs
   38         items:
   39           - const: ti,k2g-sci
   40       - description: System controller on TI AM654 SoC
   41         items:
   42           - const: ti,am654-sci
   43 
   44   reg-names:
   45     description: |
   46       Specifies the debug messages memory mapped region that is optionally
   47       made available from TI-SCI controller.
   48     const: debug_messages
   49 
   50   reg:
   51     minItems: 1
   52 
   53   mbox-names:
   54     description: |
   55       Specifies the mailboxes used to communicate with TI-SCI Controller
   56       made available from TI-SCI controller.
   57     items:
   58       - const: rx
   59       - const: tx
   60 
   61   mboxes:
   62     minItems: 2
   63 
   64   ti,system-reboot-controller:
   65     description: Determines If system reboot can be triggered by SoC reboot
   66     type: boolean
   67 
   68   ti,host-id:
   69     $ref: /schemas/types.yaml#/definitions/uint32
   70     description: |
   71       Value corresponding to the host ID assigned by Firmware
   72       for identification of host processing entities such as virtual machines.
   73 
   74   power-controller:
   75     type: object
   76     $ref: /schemas/soc/ti/sci-pm-domain.yaml#
   77 
   78   clock-controller:
   79     type: object
   80     $ref: /schemas/clock/ti,sci-clk.yaml#
   81 
   82   reset-controller:
   83     type: object
   84     $ref: /schemas/reset/ti,sci-reset.yaml#
   85 
   86 required:
   87   - compatible
   88   - mbox-names
   89   - mboxes
   90 
   91 additionalProperties: false
   92 
   93 examples:
   94   - |
   95     pmmc: system-controller@2921800 {
   96       compatible = "ti,k2g-sci";
   97       ti,system-reboot-controller;
   98       mbox-names = "rx", "tx";
   99       mboxes= <&msgmgr 5 2>,
  100               <&msgmgr 0 0>;
  101       reg-names = "debug_messages";
  102       reg = <0x02921800 0x800>;
  103     };
  104 
  105   - |
  106     dmsc: system-controller@44083000 {
  107       compatible = "ti,k2g-sci";
  108       ti,host-id = <12>;
  109       mbox-names = "rx", "tx";
  110       mboxes= <&secure_proxy_main 11>,
  111               <&secure_proxy_main 13>;
  112       reg-names = "debug_messages";
  113       reg = <0x44083000 0x1000>;
  114 
  115       k3_pds: power-controller {
  116         compatible = "ti,sci-pm-domain";
  117         #power-domain-cells = <2>;
  118       };
  119 
  120       k3_clks: clock-controller {
  121         compatible = "ti,k2g-sci-clk";
  122         #clock-cells = <2>;
  123       };
  124 
  125       k3_reset: reset-controller {
  126         compatible = "ti,sci-reset";
  127         #reset-cells = <2>;
  128       };
  129     };

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