====== Using PWM from sysfs ======
<WRAP round info 50%>
following Instuction only works for Linux kernel 3.11 or greater 
</WRAP>


==== Where to find PWM devices in sysfs ====

PWM devices are listed under **/sys/class/pwm**

==== Enable PWM device ====

<code>
root@MBaXXX:~ cd /sys/class/pwm                                                   // enter pwm folder in sysfs
root@MBaXXX:/sys/class/pwm cd pwmchip<pwmchipnr>                                  // enter the desired pwmchip folder
root@MBaXXX:/sys/your/path/to/pwmchip/pwmchip<pwmchipnr> echo <pwmnr> > export    // export device PWM<pwmnr> 
root@MBaXXX:/sys/your/path/to/pwmchip/pwmchip<pwmchipnr> cd pwm<pwmnr>            // enter exported pwm device folder 
</code>
++++ example |
<code>
root@MBaXXX:~ 
root@MBaXXX:~ 
root@MBaXXX:~ 
root@MBaXXX:~ 
</code>
++++