Ah, PWM may be one of those things that still needs work in kernel 4.x . . . Robert would probably know.
On Sun, Aug 23, 2015 at 3:39 PM, William Hermans <[email protected]> wrote: > hmm are there no PWM overlays already in that git ? > > On Sun, Aug 23, 2015 at 3:37 PM, M@ <[email protected]> wrote: > >> Yes, and 1.4.1 respectively: >> >> [root@stompyCentralControl sys]# zcat /proc/config.gz | grep CONFIG_BONE >> CONFIG_BONE_CAPEMGR=y >> [root@stompyCentralControl sys]# dtc -v >> Version: DTC 1.4.1 >> [root@stompyCentralControl sys]# >> >> On Sun, Aug 23, 2015 at 6:33 PM, William Hermans <[email protected]> >> wrote: >> >>> Have you read this ? >>> >>> https://github.com/beagleboard/bb.org-overlays >>> >>> What version dtc are you using ? it must be 1.4.1 or greater. >>> >>> On Sun, Aug 23, 2015 at 2:06 PM, M@ Dunlap <[email protected]> >>> wrote: >>> >>>> Hello all, I'm trying with increasing desperation to get my BBB (that >>>> is running 4.1.4-1-ARCH) to use a PWM. It used to work, but then I updated >>>> from 3.8 to 4.1 and now it's back to SNAFU. I'm trying to get device trees >>>> to work, but I really, really don't get device tree overlays, I've read all >>>> the guides/docs and am still clueless. >>>> >>>> My current best guess is to first load >>>> https://github.com/ProjectHexapod/bbbStuff/blob/master/overlays/am33xx_pwm-00A0.dts >>>> to activate pwm, and then load >>>> https://github.com/ProjectHexapod/bbbStuff/blob/master/overlays/thigh_bone-00A0.dts >>>> to configure all the pins. Unfortunately when I do that and then try to >>>> echo something into pwmFolder/duty it tells me that the permission is >>>> denied. I also don't understand why those need to be separate device tree >>>> overlays. >>>> >>>> In attempting to isolate the problem I also came up with the following, >>>> but it gives the same permission denied errors. I'm out of ideas, please >>>> send help! Also, even if you don't know how to solve the problem, I'd also >>>> be interested to hear if there are style or high-level problems with my >>>> approach.... >>>> >>>> /dts-v1/; >>>> /plugin/; >>>> >>>> / { >>>> compatible = "ti,beaglebone", "ti,beaglebone-black"; >>>> >>>> /* identification */ >>>> part-number = "test1"; >>>> version = "00A0"; >>>> exclusive-use = >>>> /* the pin header uses */ >>>> "P8.13", >>>> /* the hardware IP uses */ >>>> "ehrpwm2B"; >>>> >>>> fragment@0 { >>>> target = <&epwmss0>; >>>> __overlay__ { >>>> status = "okay"; >>>> }; >>>> }; >>>> >>>> fragment@1 { >>>> target = <&ehrpwm0>; >>>> __overlay__ { >>>> status = "okay"; >>>> }; >>>> }; >>>> >>>> fragment@2 { >>>> target = <&epwmss1>; >>>> __overlay__ { >>>> status = "okay"; >>>> }; >>>> }; >>>> >>>> fragment@3 { >>>> target = <&ehrpwm1>; >>>> __overlay__ { >>>> status = "okay"; >>>> }; >>>> }; >>>> >>>> fragment@4 { >>>> target = <&epwmss2>; >>>> __overlay__ { >>>> status = "okay"; >>>> }; >>>> }; >>>> >>>> fragment@5 { >>>> target = <&ehrpwm2>; >>>> __overlay__ { >>>> status = "okay"; >>>> }; >>>> }; >>>> >>>> fragment@6 { >>>> target = <&am33xx_pinmux>; >>>> __overlay__ { >>>> bs_pwm_P8_13_0x14: pinmux_bs_pwm_P8_13_0x14 { >>>> pinctrl-single,pins = <0x024 0x14>; >>>> }; >>>> }; >>>> }; >>>> >>>> fragment@7 { >>>> target = <&ocp>; >>>> __overlay__ { >>>> bs_pwm_test_P8_13 { >>>> compatible = "pwm_test"; >>>> pwms = <&ehrpwm2 1 500000 1>; >>>> pwm-names = "PWM_P8_13"; >>>> >>>> pinctrl-names = "default"; >>>> pinctrl-0 = <&bs_pwm_P8_13_0x14>; >>>> >>>> enabled = <1>; >>>> duty = <0>; >>>> status = "okay"; >>>> }; >>>> }; >>>> }; >>>> }; >>>> >>>> -- >>>> 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. >>>> >>> >>> -- >>> 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/hsyqGGqAQsI/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. >> > > -- 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.
