| Philip, Avinash | af0ba00 | 2012-11-27 14:18:06 +0530 | [diff] [blame] | 1 | TI SOC based PWM Subsystem |
| 2 | |
| 3 | Required properties: |
| 4 | - compatible: Must be "ti,am33xx-pwmss"; |
| 5 | - reg: physical base address and size of the registers map. |
| 6 | - address-cells: Specify the number of u32 entries needed in child nodes. |
| 7 | Should set to 1. |
| 8 | - size-cells: specify number of u32 entries needed to specify child nodes size |
| 9 | in reg property. Should set to 1. |
| 10 | - ranges: describes the address mapping of a memory-mapped bus. Should set to |
| 11 | physical address map of child's base address, physical address within |
| 12 | parent's address space and length of the address map. For am33xx, |
| 13 | 3 set of child register maps present, ECAP register space, EQEP |
| 14 | register space, EHRPWM register space. |
| 15 | |
| 16 | Also child nodes should also populated under PWMSS DT node. |
| 17 | |
| 18 | Example: |
| 19 | pwmss0: pwmss@48300000 { |
| 20 | compatible = "ti,am33xx-pwmss"; |
| 21 | reg = <0x48300000 0x10>; |
| 22 | ti,hwmods = "epwmss0"; |
| 23 | #address-cells = <1>; |
| 24 | #size-cells = <1>; |
| 25 | status = "disabled"; |
| 26 | ranges = <0x48300100 0x48300100 0x80 /* ECAP */ |
| 27 | 0x48300180 0x48300180 0x80 /* EQEP */ |
| 28 | 0x48300200 0x48300200 0x80>; /* EHRPWM */ |
| 29 | |
| 30 | /* child nodes go here */ |
| 31 | }; |