On Wed, Dec 28, 2016 at 8:10 AM, Kevin Cox <kaco...@gmail.com> wrote:
> Hello > > I am trying to enable and use eqep0 on my BBB (kernel 4.4.30-ti-r64) and > am encountering a pin conflict (pin 107) between the eqep driver and mcasp > driver > > From dmesg output: > > [ 41.150493] eqep 48300180.eqep: ver. 1.0 > [ 41.150628] pinctrl-single 44e10800.pinmux: pin 44e109ac.0 already > requested by 48038000.mcasp; cannot claim for 48300180.eqep > [ 41.162226] pinctrl-single 44e10800.pinmux: pin-107 (48300180.eqep) > status -22 > [ 41.169520] pinctrl-single 44e10800.pinmux: could not request pin 107 > (44e109ac.0) from group pinctrl_eqep0_pins on device pinctrl-single > [ 41.182036] eqep 48300180.eqep: Error applying setting, reverse things > back > > > In /boot/uEnv.txt I enable bone_eqep0 and disable HDMI with/without audio: > > ##Example v4.1.x > cape_disable=bone_capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN > cape_enable=bone_capemgr.enable_partno=BB-UART1,bone_eqep0 > Thats wrong. First of all cape_disable for the purpose you're trying to achieve here is unnecessary. william@beaglebone:~/dev$ head /boot/uEnv.txt #Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0 uname_r=4.4.27-ti-r62 #uuid= #dtb= ##BeagleBone Black/Green dtb's for v4.1.x (BeagleBone White just works..) ##BeagleBone Black: HDMI (Audio/Video) disabled: dtb=am335x-boneblack-emmc-overlay.dtb > In /opt/bb.org-overlays/src/arm/bone_eqep0-00A0 shows the following pins > being used which none of them map to pin 107 on my BBB: > > pinctrl-single,pins = < > BONE_P9_42B (PIN_INPUT | MUX_MODE1) // GPIO3_18 = EQEP0A_in > BONE_P9_27 (PIN_INPUT | MUX_MODE1) // GPIO3_19 = EQEP0B_in > BONE_P9_41B (PIN_INPUT | MUX_MODE1) // GPIO3_20 = EQEP0_index > BONE_P9_25 (PIN_INPUT | MUX_MODE1) // GPIO3_21 = EQEP0_strobe > > I have found a thread here: https://groups.google.com/ > forum/#!category-topic/beagleboard/audio/YNhtwbe_b4k that shows how to > disable mcasp0 but I am concerned that something is not configured right as > my understanding was that eqep0 should not conflict with other hardware and > especially a pin that should not overlap. Am I missing something obvious. > I thought I could just enable this driver out of the box. > The rest assuming your overlay is correct should just work. -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORp-f0VprPWqqjPHEa3GEHomhXsg31qnjVMpu1ArA79Hbg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
