projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| af0ba001 PA |
1 | TI SOC based PWM Subsystem |
| 2 | ||
| 3 | Required properties: | |
| 96d5a545 FCJ |
4 | - compatible: Must be "ti,<soc>-pwmss". |
| 5 | for am33xx - compatible = "ti,am33xx-pwmss"; | |
| 6 | for am4372 - compatible = "ti,am4372-pwmss","ti,am33xx-pwmss"; | |
| 34370142 | 7 | for dra746 - compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss" |
| 96d5a545 | 8 | |
| af0ba001 PA |
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 size | |
| 13 | in reg property. Should set to 1. | |
| 14 | - ranges: describes the address mapping of a memory-mapped bus. Should set to | |
| 15 | physical address map of child's base address, physical address within | |
| 16 | parent's address space and length of the address map. For am33xx, | |
| 17 | 3 set of child register maps present, ECAP register space, EQEP | |
| 18 | register space, EHRPWM register space. | |
| 19 | ||
| 20 | Also child nodes should also populated under PWMSS DT node. | |
| 21 | ||
| 22 | Example: | |
| 96d5a545 | 23 | epwmss0: epwmss@48300000 { /* PWMSS for am33xx */ |
| af0ba001 PA |
24 | compatible = "ti,am33xx-pwmss"; |
| 25 | reg = <0x48300000 0x10>; | |
| 26 | ti,hwmods = "epwmss0"; | |
| 27 | #address-cells = <1>; | |
| 28 | #size-cells = <1>; | |
| 29 | status = "disabled"; | |
| 30 | ranges = <0x48300100 0x48300100 0x80 /* ECAP */ | |
| 31 | 0x48300180 0x48300180 0x80 /* EQEP */ | |
| 32 | 0x48300200 0x48300200 0x80>; /* EHRPWM */ | |
| 33 | ||
| 34 | /* child nodes go here */ | |
| 35 | }; | |
| 96d5a545 FCJ |
36 | |
| 37 | epwmss0: epwmss@48300000 { /* PWMSS for am4372 */ | |
| 38 | compatible = "ti,am4372-pwmss","ti,am33xx-pwmss" | |
| 39 | reg = <0x48300000 0x10>; | |
| 40 | ti,hwmods = "epwmss0"; | |
| 41 | #address-cells = <1>; | |
| 42 | #size-cells = <1>; | |
| 43 | status = "disabled"; | |
| 44 | ranges = <0x48300100 0x48300100 0x80 /* ECAP */ | |
| 45 | 0x48300180 0x48300180 0x80 /* EQEP */ | |
| 46 | 0x48300200 0x48300200 0x80>; /* EHRPWM */ | |
| 47 | ||
| 48 | /* child nodes go here */ | |
| 49 | }; | |
| 34370142 V |
50 | |
| 51 | epwmss0: epwmss@4843e000 { /* PWMSS for DRA7xx */ | |
| 52 | compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss"; | |
| 53 | reg = <0x4843e000 0x30>; | |
| 54 | ti,hwmods = "epwmss0"; | |
| 55 | #address-cells = <1>; | |
| 56 | #size-cells = <1>; | |
| 57 | ranges; | |
| 58 | ||
| 59 | /* child nodes go here */ | |
| 60 | }; |