We're trying to set up BBB to run our own cape using UIO for speed.
I'm running Debian 2-12-19
We're using the .dtbo file that worked with the Slots scheme:
/dts-v1/;
/plugin/;
/ {
compatible = "ti,beaglebone", "ti,beaglebone-black";
part-number = "EBB-PRU-ADC";
version = "00A0trf4";
/* This overlay uses the following resources */
exclusive-use =
"P9.25","P9.27", "P9.28", "P9.29", "P9.30", "P9.31", "P8.46",
"pru0", "pru1";
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__ {
pru_pru_pins: pinmux_pru_pru_pins { // The PRU pin modes
pinctrl-single,pins = <
// See Table 6-7, no pull up/down resistors enabled. TRF
MISO1 added
0x1ac 0x2e // MISO_2 P9_25 pr1_pru0_pru_r31_7, MODE6
| INPUT | DIS 00101110=0x2e
0x1a4 0x0d // CS P9_27 pr1_pru0_pru_r30_5, MODE5
| OUTPUT | DIS 00001101=0x0d
0x19c 0x2e // MISO_0 P9_28 pr1_pru0_pru_r31_3, MODE6
| INPUT | DIS 00101110=0x2e
0x194 0x2e // MISO_1 P9_29 pr1_pru0_pru_r31_1, MODE6
| INPUT | DIS 00101110=0x2e
0x198 0x0d // CLK P9_30 pr1_pru0_pru_r30_2, MODE5
| OUTPUT | DIS 00001101=0x0d
0x190 0x2e // MISO_3 P9_31 pr1_pru0_pru_r31_0, MODE6
| INPUT | DIS 00101110=0x2e
// This is for PRU1, the sample clock -- debug only
0x0a4 0x0d // SAMP P8_46 pr1_pru1_pru_r30_1, MODE5
| OUTPUT | DIS 00001101=0x0d
>;
};
};
};
fragment@1
{ // kernel 4.14 - error to do this
target = <&pruss>;
__overlay__ {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&pru_pru_pins>;
};
};
};
This file compiled clean but for these warnings:
EBB-PRU-ADC4-00A1.dtbo: Warning (unit_address_vs_reg): Node /fragment@0 has
a unit name, but no reg property
EBB-PRU-ADC4-00A1.dtbo: Warning (unit_address_vs_reg): Node /fragment@1 has
a unit name, but no reg property
--------------------------------------------------------------------------------------
The uEnv.txt file is:
uname_r=4.14.71-ti-r80
#uuid=
#dtb=
###U-Boot Overlays###
###Documentation:
http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays
###Master Enable
enable_uboot_overlays=1
###
###Overide capes with eeprom
#uboot_overlay_addr0=/lib/firmware/<file0>.dtbo
#uboot_overlay_addr1=/lib/firmware/<file1>.dtbo
#uboot_overlay_addr2=/lib/firmware/<file2>.dtbo
#uboot_overlay_addr3=/lib/firmware/<file3>.dtbo
###
###Additional custom capes
#uboot_overlay_addr4=/lib/firmware/<file4>.dtbo
uboot_overlay_addr4=/lib/firmware/EBB-PRU-ADC4-00A1.dtbo
#uboot_overlay_addr5=/lib/firmware/<file5>.dtbo
#uboot_overlay_addr6=/lib/firmware/<file6>.dtbo
#uboot_overlay_addr7=/lib/firmware/<file7>.dtbo
###
###Custom Cape
#dtb_overlay=/lib/firmware/<file8>.dtbo
###
###Disable auto loading of virtual capes (emmc/video/wireless/adc)
#disable_uboot_overlay_emmc=1
disable_uboot_overlay_video=1
disable_uboot_overlay_audio=1
disable_uboot_overlay_wireless=1
disable_uboot_overlay_adc=1
###
###PRUSS OPTIONS
###pru_rproc (4.4.x-ti kernel)
#uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-4-TI-00A0.dtbo
###pru_rproc (4.14.x-ti kernel)
#uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-14-TI-00A0.dtbo
###pru_uio (4.4.x-ti, 4.14.x-ti & mainline/bone kernel)
uboot_overlay_pru=/lib/firmware/AM335X-PRU-UIO-00A0.dtbo
###
###Cape Universal Enable
#enable_uboot_cape_universal=1
###
###Debug: disable uboot autoload of Cape
#disable_uboot_overlay_addr0=1
#disable_uboot_overlay_addr1=1
#disable_uboot_overlay_addr2=1
#disable_uboot_overlay_addr3=1
###
###U-Boot fdt tweaks... (60000 = 384KB)
#uboot_fdt_buffer=0x60000
###U-Boot Overlays###
cmdline=coherent_pool=1M net.ifnames=0 quiet
#In the event of edid real failures, uncomment this next line:
#cmdline=coherent_pool=1M net.ifnames=0 quiet video=HDMI-A-1:1024x768@60e
#Use an overlayfs on top of a read-only root filesystem:
#cmdline=coherent_pool=1M net.ifnames=0 quiet overlayroot=tmpfs
##enable Generic eMMC Flasher:
#cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh
----------------------------------------
Pin 9_27 is one of ours. I woul hope that it was set up at reboot, but::
config-pin -q P9.27
P9_27 pinmux file not found!
Cannot read pinmux file: /sys/devices/platform/ocp/ocp*P9_27_pinmux/state
--------------------------------------------
Can anyone see what we're doing wrong?
Thanks in advance
Peter Laurie
--
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