st,stm32-rtc.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/rtc/st,stm32-rtc.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: STMicroelectronics STM32 Real Time Clock Bindings
    8 
    9 maintainers:
   10   - Gabriel Fernandez <gabriel.fernandez@foss.st.com>
   11 
   12 properties:
   13   compatible:
   14     enum:
   15       - st,stm32-rtc
   16       - st,stm32h7-rtc
   17       - st,stm32mp1-rtc
   18 
   19   reg:
   20     maxItems: 1
   21 
   22   clocks:
   23     minItems: 1
   24     maxItems: 2
   25 
   26   clock-names:
   27     items:
   28       - const: pclk
   29       - const: rtc_ck
   30 
   31   interrupts:
   32     maxItems: 1
   33 
   34   st,syscfg:
   35     $ref: "/schemas/types.yaml#/definitions/phandle-array"
   36     items:
   37       minItems: 3
   38       maxItems: 3
   39     description: |
   40       Phandle/offset/mask triplet. The phandle to pwrcfg used to
   41       access control register at offset, and change the dbp (Disable Backup
   42       Protection) bit represented by the mask, mandatory to disable/enable backup
   43       domain (RTC registers) write protection.
   44 
   45   assigned-clocks:
   46     description: |
   47       override default rtc_ck parent clock reference to the rtc_ck clock entry
   48     maxItems: 1
   49 
   50   assigned-clock-parents:
   51     description: |
   52       override default rtc_ck parent clock phandle of the new parent clock of rtc_ck
   53     maxItems: 1
   54 
   55 allOf:
   56   - if:
   57       properties:
   58         compatible:
   59           contains:
   60             const: st,stm32-rtc
   61 
   62     then:
   63       properties:
   64         clocks:
   65           minItems: 1
   66           maxItems: 1
   67 
   68         clock-names: false
   69 
   70       required:
   71         - st,syscfg
   72 
   73   - if:
   74       properties:
   75         compatible:
   76           contains:
   77             const: st,stm32h7-rtc
   78 
   79     then:
   80       properties:
   81         clocks:
   82           minItems: 2
   83           maxItems: 2
   84 
   85       required:
   86         - clock-names
   87         - st,syscfg
   88 
   89   - if:
   90       properties:
   91         compatible:
   92           contains:
   93             const: st,stm32mp1-rtc
   94 
   95     then:
   96       properties:
   97         clocks:
   98           minItems: 2
   99           maxItems: 2
  100 
  101         assigned-clocks: false
  102         assigned-clock-parents: false
  103 
  104       required:
  105         - clock-names
  106 
  107 required:
  108   - compatible
  109   - reg
  110   - clocks
  111   - interrupts
  112 
  113 additionalProperties: false
  114 
  115 examples:
  116   - |
  117     #include <dt-bindings/mfd/stm32f4-rcc.h>
  118     #include <dt-bindings/clock/stm32fx-clock.h>
  119     rtc@40002800 {
  120       compatible = "st,stm32-rtc";
  121       reg = <0x40002800 0x400>;
  122       clocks = <&rcc 1 CLK_RTC>;
  123       assigned-clocks = <&rcc 1 CLK_RTC>;
  124       assigned-clock-parents = <&rcc 1 CLK_LSE>;
  125       interrupt-parent = <&exti>;
  126       interrupts = <17 1>;
  127       st,syscfg = <&pwrcfg 0x00 0x100>;
  128     };
  129 
  130   - |
  131     #include <dt-bindings/interrupt-controller/arm-gic.h>
  132     #include <dt-bindings/clock/stm32mp1-clks.h>
  133     rtc@5c004000 {
  134       compatible = "st,stm32mp1-rtc";
  135       reg = <0x5c004000 0x400>;
  136       clocks = <&rcc RTCAPB>, <&rcc RTC>;
  137       clock-names = "pclk", "rtc_ck";
  138       interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
  139     };
  140 
  141 ...

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/rtc/st,stm32-rtc.yaml

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sys/contrib/device-tree/Bindings/rtc/st,stm32-rtc.yaml