It turns out P9_19 and P9_20 default to i2c. I changed the .dts file to set them to gpio and the display works on SPI0.
--Mark On Tuesday, November 3, 2020 at 5:17:18 PM UTC-5 Mark A. Yoder wrote: > I have an ADAFRUIT 3.4" LCD display that works on SPI1 using [1]. When > switching it to SPI0 and [2] I get the following error. > > [ +0.064441] omap2_mcspi 48030000.spi: chipselect 0 already in use > [ +0.006268] spi_master spi0: spi_device register error > /ocp/spi@48030000/channel@0 > [ +0.007651] spi_master spi0: Failed to create SPI device for > /ocp/spi@48030000/channel@0 > > Any ideas what's up? The backlight works, but the LCD doesn't display > anything. > > [1] > https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-LCD-ADAFRUIT-24-SPI1-00A0.dts > > [2] > https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-LCD-ADAFRUIT-24-SPI0-00A0.dts > > sudo /opt/scripts/tools/version.sh > [sudo] password for debian: > git:/opt/scripts/:[ef16ffa8c27225005cc2b2c974a83da3dee6c1ef] > eeprom:[A335BNLT0A5A1513BBBK3586] > model:[TI_AM335x_BeagleBone_Black] > dogtag:[BeagleBoard.org Debian Buster IoT Image 2020-08-31] > bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot > 2019.04-00002-gc9b3922522]:[location: dd MBR] > UBOOT: Booted Device-Tree:[am335x-boneblack-uboot-univ.dts] > UBOOT: Loaded Overlay:[AM335X-PRU-RPROC-4-19-TI-00A0] > UBOOT: Loaded Overlay:[BB-ADC-00A0] > UBOOT: Loaded Overlay:[BB-BONE-eMMC1-01-00A0] > UBOOT: Loaded Overlay:[BB-LCD-ADAFRUIT-24-SPI0-00A0] > kernel:[4.19.94-ti-r50] > nodejs:[v10.21.0] > /boot/uEnv.txt Settings: > uboot_overlay_options:[enable_uboot_overlays=1] > > uboot_overlay_options:[uboot_overlay_addr4=BB-LCD-ADAFRUIT-24-SPI0-00A0.dtbo] > uboot_overlay_options:[disable_uboot_overlay_video=1] > > uboot_overlay_options:[uboot_overlay_pru=AM335X-PRU-RPROC-4-19-TI-00A0.dtbo] > uboot_overlay_options:[enable_uboot_cape_universal=1] > pkg check: to individually upgrade run: [sudo apt install --only-upgrade > <pkg>] > pkg:[bb-cape-overlays]:[4.14.20200814.0-0~buster+20200814] > pkg:[bb-wl18xx-firmware]:[1.20200813.1-0~buster+20200813] > pkg:[kmod]:[26-1] > pkg:[librobotcontrol]:[1.0.5-git20200715.0-0~buster+20200716] > pkg:[firmware-ti-connectivity]:[20190717-2rcnee1~buster+20200305] > groups:[debian : debian adm kmem dialout cdrom floppy audio dip video > plugdev users systemd-journal input bluetooth netdev i2c gpio admin spi iio > docker tisdk weston-launch xenomai cloud9ide pwm eqep remoteproc] > cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 > root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M > net.ifnames=0 lpj=1990656 rng_core.default_quality=100 quiet] > dmesg | grep remote > [ 64.629243] remoteproc remoteproc0: wkup_m3 is available > [ 64.647970] remoteproc remoteproc0: powering up wkup_m3 > [ 64.648005] remoteproc remoteproc0: Booting fw image > am335x-pm-firmware.elf, size 217168 > [ 64.648293] remoteproc remoteproc0: remote processor wkup_m3 is now up > [ 66.850264] remoteproc remoteproc1: 4a334000.pru is available > [ 66.866379] remoteproc remoteproc2: 4a338000.pru is available > dmesg | grep pru > [ 66.850264] remoteproc remoteproc1: 4a334000.pru is available > [ 66.851362] pru-rproc 4a334000.pru: PRU rproc node pru@4a334000 probed > successfully > [ 66.866379] remoteproc remoteproc2: 4a338000.pru is available > [ 66.866574] pru-rproc 4a338000.pru: PRU rproc node pru@4a338000 probed > successfully > dmesg | grep pinctrl-single > [ 0.926234] pinctrl-single 44e10800.pinmux: 142 pins, size 568 > dmesg | grep gpio-of-helper > [ 0.939877] gpio-of-helper ocp:cape-universal: ready > lsusb > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > END > -- 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/e19866fe-bae8-4aee-8c21-671b29f64d4an%40googlegroups.com.
