| TI SOC based PWM Subsystem |
| |
| Required properties: |
| - compatible: Must be "ti,<soc>-pwmss". |
| for am33xx - compatible = "ti,am33xx-pwmss"; |
| for am4372 - compatible = "ti,am4372-pwmss","ti,am33xx-pwmss"; |
| for dra746 - compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss" |
| |
| - reg: physical base address and size of the registers map. |
| - address-cells: Specify the number of u32 entries needed in child nodes. |
| Should set to 1. |
| - size-cells: specify number of u32 entries needed to specify child nodes size |
| in reg property. Should set to 1. |
| - ranges: describes the address mapping of a memory-mapped bus. Should set to |
| physical address map of child's base address, physical address within |
| parent's address space and length of the address map. For am33xx, |
| 3 set of child register maps present, ECAP register space, EQEP |
| register space, EHRPWM register space. |
| |
| Also child nodes should also populated under PWMSS DT node. |
| |
| Example: |
| epwmss0: epwmss@48300000 { /* PWMSS for am33xx */ |
| compatible = "ti,am33xx-pwmss"; |
| reg = <0x48300000 0x10>; |
| ti,hwmods = "epwmss0"; |
| #address-cells = <1>; |
| #size-cells = <1>; |
| ranges = <0x48300100 0x48300100 0x80 /* ECAP */ |
| 0x48300180 0x48300180 0x80 /* EQEP */ |
| 0x48300200 0x48300200 0x80>; /* EHRPWM */ |
| |
| /* child nodes go here */ |
| }; |
| |
| epwmss0: epwmss@48300000 { /* PWMSS for am4372 */ |
| compatible = "ti,am4372-pwmss","ti,am33xx-pwmss" |
| reg = <0x48300000 0x10>; |
| ti,hwmods = "epwmss0"; |
| #address-cells = <1>; |
| #size-cells = <1>; |
| ranges = <0x48300100 0x48300100 0x80 /* ECAP */ |
| 0x48300180 0x48300180 0x80 /* EQEP */ |
| 0x48300200 0x48300200 0x80>; /* EHRPWM */ |
| |
| /* child nodes go here */ |
| }; |
| |
| epwmss0: epwmss@4843e000 { /* PWMSS for DRA7xx */ |
| compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss"; |
| reg = <0x4843e000 0x30>; |
| ti,hwmods = "epwmss0"; |
| #address-cells = <1>; |
| #size-cells = <1>; |
| ranges; |
| |
| /* child nodes go here */ |
| }; |
