1 # SPDX-License-Identifier: GPL-2.0-only
4 $id: http://devicetree.org/schemas/watchdog/snps,dw-wdt.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Synopsys Designware Watchdog Timer
10 - $ref: "watchdog.yaml#"
13 - Jamie Iles <jamie@jamieiles.com>
39 description: DW Watchdog pre-timeout interrupt
45 - description: Watchdog timer reference clock
46 - description: APB3 interface clock
55 description: Phandle to the DW Watchdog reset lane
59 $ref: /schemas/types.yaml#/definitions/uint32-array
61 DW APB Watchdog custom timer intervals - Timeout Period ranges (TOPs).
62 Each TOP is a number loaded into the watchdog counter at the moment of
63 the timer restart. The counter decrementing happens each tick of the
64 reference clock. Therefore the TOPs array is equivalent to an array of
65 the timer expiration intervals supported by the DW APB Watchdog. Note
66 DW APB Watchdog IP-core might be synthesized with fixed TOP values,
67 in which case this property is unnecessary with default TOPs utilized.
68 default: [0x0001000 0x0002000 0x0004000 0x0008000
69 0x0010000 0x0020000 0x0040000 0x0080000
70 0x0100000 0x0200000 0x0400000 0x0800000
71 0x1000000 0x2000000 0x4000000 0x8000000]
75 unevaluatedProperties: false
85 compatible = "snps,dw-wdt";
86 reg = <0xffd02000 0x1000>;
87 interrupts = <0 171 4>;
88 clocks = <&per_base_clk>;
94 compatible = "snps,dw-wdt";
95 reg = <0xffd02000 0x1000>;
96 interrupts = <0 171 4>;
97 clocks = <&per_base_clk>;
99 snps,watchdog-tops = <0x000000FF 0x000001FF 0x000003FF
100 0x000007FF 0x0000FFFF 0x0001FFFF
101 0x0003FFFF 0x0007FFFF 0x000FFFFF
102 0x001FFFFF 0x003FFFFF 0x007FFFFF
103 0x00FFFFFF 0x01FFFFFF 0x03FFFFFF