Hi,
I want to configure the PWM on beaglebone-x15 board. so enable pwm on header pin P17_05 is EHRPWM2A and P18_44 is EHRPWM2B.
For that I am writing the seprate pwms.dts file as follows and included in the am57xx-beagle-x15.dtb file.
Dts file
&dra7_pmx_core {
ehrpwm2a_pins: pinmux_ehrpwm2a_pins {
pinctrl-single,pins = <
DRA7XX_CORE_IOPAD(0x3774, PIN_OUTPUT_PULLDOWN | MUX_MODE10) //EHRPWM2A P17_05
>;
};
ehrpwm2b_pins: pinmux_ehrpwm2b_pins {
pinctrl-single,pins = <
DRA7XX_CORE_IOPAD(0x3590, PIN_OUTPUT_PULLDOWN | MUX_MODE10) //EHRPWM2B P18_44
>;
};
};
&epwmss2 {
status = "okay";
};
&ehrpwm2 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&ehrpwm2a_pins &ehrpwm2b_pins>;
};
After compling pwnchip0 module is comes. And export the PWM-0:0 and PWM-0:1.
here we think pwm-0:0 mapped for module for ehrpwm2A and pwm-0:1 mapped with ehrpwm2B.
when I modifying pwm-0:0 like below.
even though we are modified above parameters for pwm0:0 we could not able see any voltage change or duty cycle in ehrpwm2a (P17_05 )on header pin.
giude for me.
