| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/watchdog/atmel,sama5d4-wdt.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Atmel SAMA5D4 Watchdog Timer (WDT) Controller |
| 8 | |
| 9 | maintainers: |
| 10 | - Eugen Hristev <eugen.hristev@microchip.com> |
| 11 | |
| 12 | allOf: |
| 13 | - $ref: watchdog.yaml# |
| 14 | |
| 15 | properties: |
| 16 | compatible: |
| Tom Rini | 6bb92fc | 2024-05-20 09:54:58 -0600 | [diff] [blame] | 17 | oneOf: |
| 18 | - enum: |
| 19 | - atmel,sama5d4-wdt |
| 20 | - microchip,sam9x60-wdt |
| 21 | - microchip,sama7g5-wdt |
| 22 | - items: |
| 23 | - const: microchip,sam9x7-wdt |
| 24 | - const: microchip,sam9x60-wdt |
| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 25 | |
| 26 | reg: |
| 27 | maxItems: 1 |
| 28 | |
| 29 | interrupts: |
| 30 | maxItems: 1 |
| 31 | |
| 32 | atmel,watchdog-type: |
| 33 | $ref: /schemas/types.yaml#/definitions/string |
| 34 | description: should be hardware or software. |
| 35 | oneOf: |
| 36 | - description: |
| 37 | Enable watchdog fault reset. A watchdog fault triggers |
| 38 | watchdog reset. |
| 39 | const: hardware |
| 40 | - description: |
| 41 | Enable watchdog fault interrupt. A watchdog fault asserts |
| 42 | watchdog interrupt. |
| 43 | const: software |
| 44 | default: hardware |
| 45 | |
| 46 | atmel,idle-halt: |
| 47 | $ref: /schemas/types.yaml#/definitions/flag |
| 48 | description: | |
| 49 | present if you want to stop the watchdog when the CPU is in idle state. |
| 50 | CAUTION: This property should be used with care, it actually makes the |
| 51 | watchdog not counting when the CPU is in idle state, therefore the |
| 52 | watchdog reset time depends on mean CPU usage and will not reset at all |
| 53 | if the CPU stop working while it is in idle state, which is probably |
| 54 | not what you want. |
| 55 | |
| 56 | atmel,dbg-halt: |
| 57 | $ref: /schemas/types.yaml#/definitions/flag |
| 58 | description: | |
| 59 | present if you want to stop the watchdog when the CPU is in debug state. |
| 60 | |
| 61 | required: |
| 62 | - compatible |
| 63 | - reg |
| 64 | |
| 65 | unevaluatedProperties: false |
| 66 | |
| 67 | examples: |
| 68 | - | |
| 69 | #include <dt-bindings/interrupt-controller/irq.h> |
| 70 | |
| 71 | watchdog@fc068640 { |
| 72 | compatible = "atmel,sama5d4-wdt"; |
| 73 | reg = <0xfc068640 0x10>; |
| 74 | interrupts = <4 IRQ_TYPE_LEVEL_HIGH 5>; |
| 75 | timeout-sec = <10>; |
| 76 | atmel,watchdog-type = "hardware"; |
| 77 | atmel,dbg-halt; |
| 78 | atmel,idle-halt; |
| 79 | }; |
| 80 | |
| 81 | ... |