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 Device Tree Bindings
   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           - const: microchip,sam9x60-rtt
  23           - const: atmel,at91sam9260-rtt
  24       - items:
  25           - const: microchip,sama7g5-rtt
  26           - const: microchip,sam9x60-rtt
  27           - const: atmel,at91sam9260-rtt
  28
  29   reg:
  30     maxItems: 1
  31
  32   interrupts:
  33     maxItems: 1
  34
  35   clocks:
  36     maxItems: 1
  37
  38   atmel,rtt-rtc-time-reg:
  39     $ref: /schemas/types.yaml#/definitions/phandle-array
  40     items:
  41       - items:
  42           - description: Phandle to the GPBR node.
  43           - description: Offset within the GPBR block.
  44     description:
  45       Should encode the GPBR register used to store the time base when the
  46       RTT is used as an RTC. The first cell should point to the GPBR node
  47       and the second one encodes the offset within the GPBR block (or in
  48       other words, the GPBR register used to store the time base).
  49
  50 required:
  51   - compatible
  52   - reg
  53   - interrupts
  54   - clocks
  55   - atmel,rtt-rtc-time-reg
  56
  57 unevaluatedProperties: false
  58
  59 examples:
  60   - |
  61     #include <dt-bindings/interrupt-controller/irq.h>
  62
  63     rtc@fffffd20 {
  64         compatible = "atmel,at91sam9260-rtt";
  65         reg = <0xfffffd20 0x10>;
  66         interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
  67         clocks = <&clk32k>;
  68         atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
  69     };