AM625: u-boot epwm

Tool/software:

Hi,

I'm trying to use epwm1 in u-boot.

I've tried the following:

• Added this in my u-boot device tree:

&main_pmx0 {
	epwm1_pins_default: epwm1-pins-default {
		status = "okay";
		pinctrl-single,pins = <
			AM62X_IOPAD(0x019c, PIN_OUTPUT, 6)
		>;
	};
};

&epwm1 {
	pinctrl-names = "default";
	pinctrl-0 = <&epwm1_pins_default>;
	status = "okay";
};

&epwm_tbclk {
	status = "okay";
};

• Added CMD_PWM and other relevant PWM configs in defconfig

I then tried to use "pwm enable" in u-boot but I'm getting the following error:

ti_ehrpwm pwm@23010000: failed to get tbclk clock
pwm: '0' not found
Command 'pwm' failed: Error -19

In k3-am62-main.dtsi, I see that epwm_tbclk node uses this as the compatible string:
compatible = "ti,am62-epwm-tbclk", "syscon";

Since ti,am62-epwm-tbclk is not available, it actually uses the syscon driver from .../drivers/core/syscon-uclass.c

Could this be the reason why tbclk is not initialized properly, causing the earlier error when I try to use pwm?

If so, how do I ensure tbclk is properly configured and initialized in u-boot?

Regards,

Zi Bin