Thank you Robert, That did the trick.
However, it has the side-effect of turning my display all black. I use a Newhaven display cape and according to its User Guide, there should be no conflict for these SPI-pins. (http://www.newhavendisplay.com/userguides/NHD-7.0CTP-CAPE_User_Guide.pdf) So I had a look at the assigned pins in /sys/kernel/debug/pinctrl/44e10800.pinmux/pingroups and see that following group is added (using diff): > group: pinmux_bb_spi0_pins > pin 84 (PIN84) > pin 85 (PIN85) > pin 86 (PIN86) > pin 87 (PIN87) which seems in order, but following groups were removed: < group: pinmux_bb_lcd_pwm_backlight_pins < pin 18 (PIN18) < group: pinmux_bb_lcd_lcd_pins < pin 40 (PIN40) < pin 41 (PIN41) < pin 42 (PIN42) < pin 43 (PIN43) < pin 44 (PIN44) < pin 45 (PIN45) < pin 46 (PIN46) < pin 47 (PIN47) < pin 48 (PIN48) < pin 49 (PIN49) < pin 50 (PIN50) < pin 51 (PIN51) < pin 52 (PIN52) < pin 53 (PIN53) < pin 54 (PIN54) < pin 55 (PIN55) < pin 15 (PIN15) < pin 14 (PIN14) < pin 13 (PIN13) < pin 12 (PIN12) < pin 11 (PIN11) < pin 10 (PIN10) < pin 9 (PIN9) < pin 8 (PIN8) < pin 56 (PIN56) < pin 57 (PIN57) < pin 58 (PIN58) < pin 59 (PIN59) < pin 35 (PIN35) < group: pinmux_edt_ft5x06_pins < pin 105 (PIN105) I don't know about the last group (PIN105) but the other two groups most certainly affect the display function. I haven't seen the corresponding .dts-file for BB-SPIDEV0-00A0.dtbo, but I tried making my own that should not touch these pins: Still, the same result (same pin groups are removed). There seems to be some mechanism that disables the display pins when adding an overlay to the uEnv.txt. Robert, as an expert in BBB, do you have answer to this? Best regards, Jon Lundström. Den torsdag 29 mars 2018 kl. 17:40:43 UTC+2 skrev RobertCNelson: > > On Thu, Mar 29, 2018 at 10:35 AM, Jon Lundstrom <[email protected] > <javascript:>> wrote: > > I'm trying to enable SPI on my BBB but constantly fail following the > advises > > I find in the forums. > > > > It seems like echoing anything into > /sys/devices/platform/bone_capemgr/slots > > is obsolete. Instead I should set up in /boot/uEnv.txt, but how? What > should > > I add in that file? > > > > I've tried: > > cape_enable=bone_capemgr.enable_partno=BB-SPIDEV0 > > or: > > optargs=quiet drm.debug=7 capemgr.enable_partno=BB-SPI0-01 > > https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays > > uboot_overlay_addr0=/lib/firmware/BB-SPIDEV0-00A0.dtbo > > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ > -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/c4eca54b-eb07-4e04-9eee-4d1389aff13e%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
