PWM userspace access on custom board

[ferdster]

Hi,

I followed the guide by Robert here:

https://eewiki.net/display/linuxonarm/BeagleBone+Black

I am having trouble getting PWM userspace access (/sys/class/pwm/). I don't have a 'pwmchip0' folder. In am335x-bone-common.dtsi I added:

ehrpwm2_pins: pinmux_ehrpwm2_pins {

pinctrl-single,pins = <

0xa0 ( PIN_OUTPUT | MUX_MODE3 ) /* (R1) lcd_data0.ehrpwm2A */

0xa4 ( PIN_OUTPUT | MUX_MODE3 ) /* (R2) lcd_data1.ehrpwm2B */

>;

};

&epwmss2 { 

status = "okay";

ehrpwm2 {

pinctrl-names = "default";

pinctrl-0 = <&ehrpwm2_pins>; 

status = "okay";

};

};

Should it make the pwmchip0 by itself? It did when I was running TI Linux. This is on a custom board that's based on a BBB.

Thanks.