sci-pm-domain.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/soc/ti/sci-pm-domain.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: TI-SCI generic power domain node bindings
    8 
    9 maintainers:
   10   - Nishanth Menon <nm@ti.com>
   11 
   12 allOf:
   13   - $ref: /schemas/power/power-domain.yaml#
   14 
   15 description: |
   16   Some TI SoCs contain a system controller (like the Power Management Micro
   17   Controller (PMMC) on Keystone 66AK2G SoC) that are responsible for controlling
   18   the state of the various hardware modules present on the SoC. Communication
   19   between the host processor running an OS and the system controller happens
   20   through a protocol called TI System Control Interface (TI-SCI protocol).
   21 
   22   This PM domain node represents the global PM domain managed by the TI-SCI
   23   controller. Since this relies on the TI SCI protocol to communicate with
   24   the TI-SCI controller, it must be a child of the TI-SCI controller node.
   25 
   26 properties:
   27   compatible:
   28     const: ti,sci-pm-domain
   29 
   30   "#power-domain-cells":
   31     enum: [1, 2]
   32     description:
   33       The two cells represent values that the TI-SCI controller defines.
   34 
   35       The first cell should contain the device ID.
   36 
   37       The second cell, if cell-value is 2, should be one of the following
   38       TI_SCI_PD_EXCLUSIVE - Allows the device to be exclusively controlled
   39       or
   40       TI_SCI_PD_SHARED - Allows the device to be shared by multiple hosts.
   41       Please refer to dt-bindings/soc/ti,sci_pm_domain.h for the definitions.
   42 
   43       Please see  http://processors.wiki.ti.com/index.php/TISCI for
   44       protocol documentation for the values to be used for different devices.
   45 
   46 additionalProperties: false
   47 
   48 examples:
   49   - |
   50     k2g_pds: power-controller {
   51         compatible = "ti,sci-pm-domain";
   52         #power-domain-cells = <1>;
   53     };
   54 
   55   - |
   56     k3_pds: power-controller {
   57         compatible = "ti,sci-pm-domain";
   58         #power-domain-cells = <2>;
   59     };

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