1# SPDX-License-Identifier: GPL-2.0-only 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/watchdog/snps,dw-wdt.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Synopsys Designware Watchdog Timer 8 9allOf: 10 - $ref: "watchdog.yaml#" 11 12maintainers: 13 - Jamie Iles <jamie@jamieiles.com> 14 15properties: 16 compatible: 17 oneOf: 18 - const: snps,dw-wdt 19 - items: 20 - enum: 21 - rockchip,rk3066-wdt 22 - rockchip,rk3188-wdt 23 - rockchip,rk3288-wdt 24 - rockchip,rk3368-wdt 25 - const: snps,dw-wdt 26 27 reg: 28 maxItems: 1 29 30 interrupts: 31 description: DW Watchdog pre-timeout interrupt 32 maxItems: 1 33 34 clocks: 35 minItems: 1 36 items: 37 - description: Watchdog timer reference clock 38 - description: APB3 interface clock 39 40 clock-names: 41 minItems: 1 42 items: 43 - const: tclk 44 - const: pclk 45 46 resets: 47 description: Phandle to the DW Watchdog reset lane 48 maxItems: 1 49 50 snps,watchdog-tops: 51 $ref: /schemas/types.yaml#/definitions/uint32-array 52 description: | 53 DW APB Watchdog custom timer intervals - Timeout Period ranges (TOPs). 54 Each TOP is a number loaded into the watchdog counter at the moment of 55 the timer restart. The counter decrementing happens each tick of the 56 reference clock. Therefore the TOPs array is equivalent to an array of 57 the timer expiration intervals supported by the DW APB Watchdog. Note 58 DW APB Watchdog IP-core might be synthesized with fixed TOP values, 59 in which case this property is unnecessary with default TOPs utilized. 60 default: [0x0001000 0x0002000 0x0004000 0x0008000 61 0x0010000 0x0020000 0x0040000 0x0080000 62 0x0100000 0x0200000 0x0400000 0x0800000 63 0x1000000 0x2000000 0x4000000 0x8000000] 64 minItems: 16 65 maxItems: 16 66 67unevaluatedProperties: false 68 69required: 70 - compatible 71 - reg 72 - clocks 73 74examples: 75 - | 76 watchdog@ffd02000 { 77 compatible = "snps,dw-wdt"; 78 reg = <0xffd02000 0x1000>; 79 interrupts = <0 171 4>; 80 clocks = <&per_base_clk>; 81 resets = <&wdt_rst>; 82 }; 83 84 - | 85 watchdog@ffd02000 { 86 compatible = "snps,dw-wdt"; 87 reg = <0xffd02000 0x1000>; 88 interrupts = <0 171 4>; 89 clocks = <&per_base_clk>; 90 clock-names = "tclk"; 91 snps,watchdog-tops = <0x000000FF 0x000001FF 0x000003FF 92 0x000007FF 0x0000FFFF 0x0001FFFF 93 0x0003FFFF 0x0007FFFF 0x000FFFFF 94 0x001FFFFF 0x003FFFFF 0x007FFFFF 95 0x00FFFFFF 0x01FFFFFF 0x03FFFFFF 96 0x07FFFFFF>; 97 }; 98... 99