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>
40 description: DW Watchdog pre-timeout interrupt
46 - description: Watchdog timer reference clock
47 - description: APB3 interface clock
56 description: Phandle to the DW Watchdog reset lane
60 $ref: /schemas/types.yaml#/definitions/uint32-array
62 DW APB Watchdog custom timer intervals - Timeout Period ranges (TOPs).
63 Each TOP is a number loaded into the watchdog counter at the moment of
64 the timer restart. The counter decrementing happens each tick of the
65 reference clock. Therefore the TOPs array is equivalent to an array of
66 the timer expiration intervals supported by the DW APB Watchdog. Note
67 DW APB Watchdog IP-core might be synthesized with fixed TOP values,
68 in which case this property is unnecessary with default TOPs utilized.
69 default: [0x0001000 0x0002000 0x0004000 0x0008000
70 0x0010000 0x0020000 0x0040000 0x0080000
71 0x0100000 0x0200000 0x0400000 0x0800000
72 0x1000000 0x2000000 0x4000000 0x8000000]
76 unevaluatedProperties: false
86 compatible = "snps,dw-wdt";
87 reg = <0xffd02000 0x1000>;
88 interrupts = <0 171 4>;
89 clocks = <&per_base_clk>;
95 compatible = "snps,dw-wdt";
96 reg = <0xffd02000 0x1000>;
97 interrupts = <0 171 4>;
98 clocks = <&per_base_clk>;
100 snps,watchdog-tops = <0x000000FF 0x000001FF 0x000003FF
101 0x000007FF 0x0000FFFF 0x0001FFFF
102 0x0003FFFF 0x0007FFFF 0x000FFFFF
103 0x001FFFFF 0x003FFFFF 0x007FFFFF
104 0x00FFFFFF 0x01FFFFFF 0x03FFFFFF