5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
59 lines
1.8 KiB
Plaintext
59 lines
1.8 KiB
Plaintext
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 */
|
|
};
|