I don't know if this will help, but have you tried changing the polarity of the
PWM pin in the device tree overlay?
bs_pwm_test_P8_13 {
compatible = "pwm_test";
pwms = <&ehrpwm2 1 500000 0>;
pwm-names = "PWM_P8_13";
pinctrl-names = "default";
pinctrl-0 = <&bs_pwm_P8_13_0xc>;
enabled = <1>;
duty = <0>;
status = "okay";
};
The last numeric parameter of pwms <&ehrpwm2 1 500000 0> swaps the polarity of
the PWM output.
With the default duty cycle of 0, the pin will be low on power-up.
--
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