| 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/starfive,jh7100-wdt.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: StarFive Watchdog for JH7100 and JH7110 SoC |
| 8 | |
| 9 | maintainers: |
| 10 | - Xingyu Wu <xingyu.wu@starfivetech.com> |
| 11 | - Samin Guo <samin.guo@starfivetech.com> |
| 12 | |
| 13 | description: |
| 14 | The JH7100 and JH7110 watchdog both are 32 bit counters. JH7100 watchdog |
| 15 | has only one timeout phase and reboots. And JH7110 watchdog has two |
| 16 | timeout phases. At the first phase, the signal of watchdog interrupt |
| 17 | output(WDOGINT) will rise when counter is 0. The counter will reload |
| 18 | the timeout value. And then, if counter decreases to 0 again and WDOGINT |
| 19 | isn't cleared, the watchdog will reset the system unless the watchdog |
| 20 | reset is disabled. |
| 21 | |
| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 22 | properties: |
| 23 | compatible: |
| Tom Rini | 6bb92fc | 2024-05-20 09:54:58 -0600 | [diff] [blame] | 24 | oneOf: |
| 25 | - enum: |
| 26 | - starfive,jh7100-wdt |
| 27 | - starfive,jh7110-wdt |
| 28 | - items: |
| 29 | - enum: |
| 30 | - starfive,jh8100-wdt |
| 31 | - const: starfive,jh7110-wdt |
| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 32 | |
| 33 | reg: |
| 34 | maxItems: 1 |
| 35 | |
| 36 | interrupts: |
| 37 | maxItems: 1 |
| 38 | |
| 39 | clocks: |
| 40 | items: |
| 41 | - description: APB clock |
| 42 | - description: Core clock |
| 43 | |
| 44 | clock-names: |
| 45 | items: |
| 46 | - const: apb |
| 47 | - const: core |
| 48 | |
| 49 | resets: |
| Tom Rini | 6bb92fc | 2024-05-20 09:54:58 -0600 | [diff] [blame] | 50 | minItems: 1 |
| 51 | maxItems: 2 |
| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 52 | |
| 53 | required: |
| 54 | - compatible |
| 55 | - reg |
| 56 | - clocks |
| 57 | - clock-names |
| 58 | - resets |
| 59 | |
| Tom Rini | 6bb92fc | 2024-05-20 09:54:58 -0600 | [diff] [blame] | 60 | allOf: |
| 61 | - $ref: watchdog.yaml# |
| 62 | |
| 63 | - if: |
| 64 | properties: |
| 65 | compatible: |
| 66 | contains: |
| 67 | enum: |
| 68 | - starfive,jh8100-wdt |
| 69 | then: |
| 70 | properties: |
| 71 | resets: |
| 72 | items: |
| 73 | - description: Core reset |
| 74 | else: |
| 75 | properties: |
| 76 | resets: |
| 77 | items: |
| 78 | - description: APB reset |
| 79 | - description: Core reset |
| 80 | |
| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 81 | unevaluatedProperties: false |
| 82 | |
| 83 | examples: |
| 84 | - | |
| 85 | watchdog@12480000 { |
| 86 | compatible = "starfive,jh7100-wdt"; |
| 87 | reg = <0x12480000 0x10000>; |
| 88 | clocks = <&clk 171>, |
| 89 | <&clk 172>; |
| 90 | clock-names = "apb", "core"; |
| 91 | resets = <&rst 99>, |
| 92 | <&rst 100>; |
| 93 | }; |