Kernel-4.18.0-80.el8_pwm-tipwmss

TI SOC based PWM Subsystem

Required properties:

• compatible: Must be “ti,-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 */

};