The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/timer/ti,timer-dm.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/timer/ti,timer-dm.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: TI dual-mode timer
    8 
    9 maintainers:
   10   - Tony Lindgren <tony@atomide.com>
   11 
   12 description: |
   13   The TI dual-mode timer is a general purpose timer with PWM capabilities.
   14 
   15 properties:
   16   compatible:
   17     oneOf:
   18       - items:
   19           - enum:
   20               - ti,am335x-timer
   21               - ti,am335x-timer-1ms
   22               - ti,am654-timer
   23               - ti,dm814-timer
   24               - ti,dm816-timer
   25               - ti,omap2420-timer
   26               - ti,omap3430-timer
   27               - ti,omap4430-timer
   28               - ti,omap5430-timer
   29       - items:
   30           - const: ti,am4372-timer
   31           - const: ti,am335x-timer
   32       - items:
   33           - const: ti,am4372-timer-1ms
   34           - const: ti,am335x-timer-1ms
   35 
   36   reg:
   37     items:
   38       - description: IO address
   39       - description: L3 to L4 mapping for omap4/5 L4 ABE
   40     minItems: 1
   41 
   42   clocks:
   43     items:
   44       - description: Functional clock
   45       - description: System clock for omap4/5 and dra7
   46     minItems: 1
   47 
   48   clock-names:
   49     items:
   50       - const: fck
   51       - const: timer_sys_ck
   52     minItems: 1
   53 
   54   interrupts:
   55     description:
   56       Interrupt if available. The timer PWM features may be usable
   57       in a limited way even without interrupts.
   58     maxItems: 1
   59 
   60   ti,timer-alwon:
   61     description:
   62       Timer is always enabled when the SoC is powered. Note that some SoCs like
   63       am335x can suspend to PM coprocessor RTC only mode and in that case the
   64       SoC power is cut including timers.
   65     type: boolean
   66 
   67   ti,timer-dsp:
   68     description:
   69       Timer is routable to the DSP in addition to the operating system.
   70     type: boolean
   71 
   72   ti,timer-pwm:
   73     description:
   74       Timer has been wired for PWM capability.
   75     type: boolean
   76 
   77   ti,timer-secure:
   78     description:
   79       Timer access has been limited to secure mode only.
   80     type: boolean
   81 
   82   ti,hwmods:
   83     description:
   84       Name of the HWMOD associated with timer. This is for legacy
   85       omap2/3 platforms only.
   86     $ref: /schemas/types.yaml#/definitions/string
   87     deprecated: true
   88 
   89 required:
   90   - compatible
   91   - reg
   92 
   93 additionalProperties: false
   94 
   95 allOf:
   96   - if:
   97       not:
   98         properties:
   99           compatible:
  100             contains:
  101               const: ti,am654-timer
  102     then:
  103       required:
  104         - interrupts
  105 
  106   - if:
  107       not:
  108         properties:
  109           compatible:
  110             contains:
  111               enum:
  112                 - ti,omap3430-timer
  113                 - ti,omap4430-timer
  114                 - ti,omap5430-timer
  115     then:
  116       properties:
  117         reg:
  118           maxItems: 1
  119         clocks:
  120           maxItems: 1
  121         clock-names:
  122           maxItems: 1
  123 
  124   - if:
  125       properties:
  126         compatible:
  127           contains:
  128             enum:
  129               - ti,dm814-timer
  130               - ti,dm816-timer
  131               - ti,omap2420-timer
  132               - ti,omap3430-timer
  133     then:
  134       properties:
  135         ti,hwmods:
  136           items:
  137             - pattern: "^timer([1-9]|1[0-2])$"
  138     else:
  139       properties:
  140         ti,hwmods: false
  141 
  142 examples:
  143   - |
  144     timer1: timer@0 {
  145       compatible = "ti,am335x-timer-1ms";
  146       reg = <0x0 0x400>;
  147       interrupts = <67>;
  148       ti,timer-alwon;
  149       clocks = <&timer1_fck>;
  150       clock-names = "fck";
  151     };
  152 ...

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