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1TI SOC based PWM Subsystem2 3Required properties:4- compatible: Must be "ti,<soc>-pwmss".5 for am33xx - compatible = "ti,am33xx-pwmss";6 for am4372 - compatible = "ti,am4372-pwmss","ti,am33xx-pwmss";7 for dra746 - compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss"8 9- reg: physical base address and size of the registers map.10- address-cells: Specify the number of u32 entries needed in child nodes.11 Should set to 1.12- size-cells: specify number of u32 entries needed to specify child nodes size13 in reg property. Should set to 1.14- ranges: describes the address mapping of a memory-mapped bus. Should set to15 physical address map of child's base address, physical address within16 parent's address space and length of the address map. For am33xx,17 3 set of child register maps present, ECAP register space, EQEP18 register space, EHRPWM register space.19 20Also child nodes should also populated under PWMSS DT node.21 22Example:23epwmss0: epwmss@48300000 { /* PWMSS for am33xx */24 compatible = "ti,am33xx-pwmss";25 reg = <0x48300000 0x10>;26 ti,hwmods = "epwmss0";27 #address-cells = <1>;28 #size-cells = <1>;29 ranges = <0x48300100 0x48300100 0x80 /* ECAP */30 0x48300180 0x48300180 0x80 /* EQEP */31 0x48300200 0x48300200 0x80>; /* EHRPWM */32 33 /* child nodes go here */34};35 36epwmss0: epwmss@48300000 { /* PWMSS for am4372 */37 compatible = "ti,am4372-pwmss","ti,am33xx-pwmss"38 reg = <0x48300000 0x10>;39 ti,hwmods = "epwmss0";40 #address-cells = <1>;41 #size-cells = <1>;42 ranges = <0x48300100 0x48300100 0x80 /* ECAP */43 0x48300180 0x48300180 0x80 /* EQEP */44 0x48300200 0x48300200 0x80>; /* EHRPWM */45 46 /* child nodes go here */47};48 49epwmss0: epwmss@4843e000 { /* PWMSS for DRA7xx */50 compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss";51 reg = <0x4843e000 0x30>;52 ti,hwmods = "epwmss0";53 #address-cells = <1>;54 #size-cells = <1>;55 ranges;56 57 /* child nodes go here */58};59