I want to generate PWM in my wandboard quad and i found some documentation about exporting PWM's with linux user command line like ;
echo 0> /sys/class/pwm/pwmchip3....../export
then the duty cycle and period is adjusted with
echo 1000000 > /sys/class/pwm/......./pwm0/period
My question is, in my system the pwm file doest'n exist in the /sys/class .. so I can't control the pwm's and In my /sys/kernel/debug/ file I can see the pwm's adresses and other things about pwm information .
Second thing I tried to recompile the dtb file for access the pwm's by changing the imx6q-wandboard.dtsi . In that attempt was failed again
Can you give me any idea about how to solve this problem ?