1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/watchdog/arm,sp805.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: ARM AMBA Primecell SP805 Watchdog 8 9maintainers: 10 - Viresh Kumar <vireshk@kernel.org> 11 12description: |+ 13 The Arm SP805 IP implements a watchdog device, which triggers an interrupt 14 after a configurable time period. If that interrupt has not been serviced 15 when the next interrupt would be triggered, the reset signal is asserted. 16 17allOf: 18 - $ref: /schemas/watchdog/watchdog.yaml# 19 20# Need a custom select here or 'arm,primecell' will match on lots of nodes 21select: 22 properties: 23 compatible: 24 contains: 25 const: arm,sp805 26 required: 27 - compatible 28 29properties: 30 compatible: 31 items: 32 - const: arm,sp805 33 - const: arm,primecell 34 35 interrupts: 36 maxItems: 1 37 38 reg: 39 maxItems: 1 40 41 clocks: 42 description: | 43 Clocks driving the watchdog timer hardware. The first clock is used 44 for the actual watchdog counter. The second clock drives the register 45 interface. 46 minItems: 2 47 maxItems: 2 48 49 clock-names: 50 items: 51 - const: wdog_clk 52 - const: apb_pclk 53 54required: 55 - compatible 56 - reg 57 - clocks 58 - clock-names 59 60unevaluatedProperties: false 61 62examples: 63 - | 64 #include <dt-bindings/interrupt-controller/arm-gic.h> 65 watchdog@66090000 { 66 compatible = "arm,sp805", "arm,primecell"; 67 reg = <0x66090000 0x1000>; 68 interrupts = <GIC_SPI 406 IRQ_TYPE_LEVEL_HIGH>; 69 clocks = <&wdt_clk>, <&apb_pclk>; 70 clock-names = "wdog_clk", "apb_pclk"; 71 }; 72