Documentation/devicetree/bindings/rtc/atmel,at91sam9260-rtt.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 # Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries
   3 %YAML 1.2
   4 ---
   5 $id: http://devicetree.org/schemas/rtc/atmel,at91sam9260-rtt.yaml#
   6 $schema: http://devicetree.org/meta-schemas/core.yaml#
   7
   8 title: Atmel AT91 RTT
   9
  10 allOf:
  11   - $ref: rtc.yaml#
  12
  13 maintainers:
  14   - Alexandre Belloni <alexandre.belloni@bootlin.com>
  15
  16 properties:
  17   compatible:
  18     oneOf:
  19       - items:
  20           - const: atmel,at91sam9260-rtt
  21       - items:
  22           - enum:
  23               - microchip,sam9x60-rtt
  24               - microchip,sam9x7-rtt
  25           - const: atmel,at91sam9260-rtt
  26       - items:
  27           - const: microchip,sama7g5-rtt
  28           - const: microchip,sam9x60-rtt
  29           - const: atmel,at91sam9260-rtt
  30
  31   reg:
  32     maxItems: 1
  33
  34   interrupts:
  35     maxItems: 1
  36
  37   clocks:
  38     maxItems: 1
  39
  40   atmel,rtt-rtc-time-reg:
  41     $ref: /schemas/types.yaml#/definitions/phandle-array
  42     items:
  43       - items:
  44           - description: Phandle to the GPBR node.
  45           - description: Offset within the GPBR block.
  46     description:
  47       Should encode the GPBR register used to store the time base when the
  48       RTT is used as an RTC. The first cell should point to the GPBR node
  49       and the second one encodes the offset within the GPBR block (or in
  50       other words, the GPBR register used to store the time base).
  51
  52 required:
  53   - compatible
  54   - reg
  55   - interrupts
  56   - clocks
  57   - atmel,rtt-rtc-time-reg
  58
  59 unevaluatedProperties: false
  60
  61 examples:
  62   - |
  63     #include <dt-bindings/interrupt-controller/irq.h>
  64
  65     rtc@fffffd20 {
  66         compatible = "atmel,at91sam9260-rtt";
  67         reg = <0xfffffd20 0x10>;
  68         interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
  69         clocks = <&clk32k>;
  70         atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
  71     };