I have the PWM working perfectly on the 4.1 kernel, and I am planning to post the solution to this thread within a few days.
On Wed, Sep 30, 2015 at 12:36 AM, Khanh Nguyen <[email protected]> wrote: > No, I haven't been able to get kernel 4.1 and PWM working. I haven't > looked at the link you included either. I'll definitely take a look over > the weekend. Hey, can you send me the link to this post on google group? I > can't seem to find my post... > > Thanks, > Khanh > > On Sun, Sep 27, 2015 at 4:08 PM, <[email protected]> wrote: > >> >> Khanh, >> >> Have you got the PWMs working yet? This documentation ( >> http://processors.wiki.ti.com/index.php/Linux_Core_PWM_User's_Guide) >> most closely matches what I am seeing under the 4.1 kernel, but I had to >> fall back on these same old overlays to even see the PWMs. Seem to able to >> export, configure, and enable the PWM, but I'm just not seeing anything on >> the output pin. >> >> -Kevin >> >> >> On Wednesday, September 9, 2015 at 3:20:19 AM UTC-5, Khanh Nguyen wrote: >>> >>> Hey guys, I'm working on a project where as I was using the >>> ocp.X/bone_pwm_P9_11 and such in kernel 3.8. I just recently updated my >>> Beaglebone black to kernel 4.1 and couldn't get PWM to work... >>> >>> I was trying to use dtc, rebuild the device tree overlay. I pulled the >>> old am33xx_pwm from >>> https://github.com/beagleboard/devicetree-source/blob/master/arch/arm/boot/dts/am33xx_pwm-00A0.dts >>> and some of these bad boys bone_pwm_PX_YZ from >>> https://github.com/beagleboard/devicetree-source/blob/master/arch/arm/boot/dts/bone_pwm_P8_13-00A0.dts. >>> I know that these are pretty old, but was just thinking maybe it would work >>> with the new kernel? >>> >>> Then I was able to build these device tree overlays and load them into >>> the /boot/uEnv.txt. However, when I went to /sys/devices/platform, I only >>> saw ocp:pwm and it's nothing like the old kernel 3.8 where you'd have duty, >>> period, and all that good stuff. Is this the right way to access PWM or I >>> had to use the example in the Bacon device tree overlay? If so, is there a >>> document on how to know which PWM pin to export? >>> >>> I've been playing with this new kernel for quite a while now and still >>> haven't got any luck. Any advice or pointers will be greatly appreciated. >>> >>> Thanks >>> >>> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to a topic in the >> Google Groups "BeagleBoard" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/beagleboard/dkS51WbicTo/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/dkS51WbicTo/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
