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1* Device tree bindings for Texas Instruments keystone reset2 3This node is intended to allow SoC reset in case of software reset4of selected watchdogs.5 6The Keystone SoCs can contain up to 4 watchdog timers to reset7SoC. Each watchdog timer event input is connected to the Reset Mux8block. The Reset Mux block can be configured to cause reset or not.9 10Additionally soft or hard reset can be configured.11 12Required properties:13 14- compatible: ti,keystone-reset15 16- ti,syscon-pll: phandle/offset pair. The phandle to syscon used to17 access pll controller registers and the offset to use18 reset control registers.19 20- ti,syscon-dev: phandle/offset pair. The phandle to syscon used to21 access device state control registers and the offset22 in order to use mux block registers for all watchdogs.23 24Optional properties:25 26- ti,soft-reset: Boolean option indicating soft reset.27 By default hard reset is used.28 29- ti,wdt-list: WDT list that can cause SoC reset. It's not related30 to WDT driver, it's just needed to enable a SoC related31 reset that's triggered by one of WDTs. The list is32 in format: <0>, <2>; It can be in random order and33 begins from 0 to 3, as keystone can contain up to 4 SoC34 reset watchdogs and can be in random order.35 36Example 1:37Setup keystone reset so that in case software reset or38WDT0 is triggered it issues hard reset for SoC.39 40pllctrl: pll-controller@2310000 {41 compatible = "ti,keystone-pllctrl", "syscon";42 reg = <0x02310000 0x200>;43};44 45devctrl: device-state-control@2620000 {46 compatible = "ti,keystone-devctrl", "syscon";47 reg = <0x02620000 0x1000>;48};49 50rstctrl: reset-controller {51 compatible = "ti,keystone-reset";52 ti,syscon-pll = <&pllctrl 0xe4>;53 ti,syscon-dev = <&devctrl 0x328>;54 ti,wdt-list = <0>;55};56 57Example 2:58Setup keystone reset so that in case of software reset or59WDT0 or WDT2 is triggered it issues soft reset for SoC.60 61rstctrl: reset-controller {62 compatible = "ti,keystone-reset";63 ti,syscon-pll = <&pllctrl 0xe4>;64 ti,syscon-dev = <&devctrl 0x328>;65 ti,wdt-list = <0>, <2>;66 ti,soft-reset;67};68