I am trying to toggle a GPIO pin (P8_11) using PRU0. I was able to load
the uio_pruss driver by using the steps below, when I do lsmod this looks
correct as well. I also am able to load a program successfully into the
PRU using the prussdrv_xxx interface. However it looks like I do not have
my overlay correct. I modified the uio_pruss_enable-A00.dts overlay file
(see below) based on the most current posts I could find. Yet my dmesg
output shows a "pins are not configured from the driver" error and
I do not see the correct value (6) for pin 15 in the pinmux file. I don't
understand when/how uio_pruss driver picks up the changes in the
uio_pruss_enable file or whether I have it in the correct format. There
seems to be multiple ways this file can be configured depending on kernel
and kernel version.
*modify uEnv.txt*
dtb=am335x-boneblack-emmc-overlay.dtb
cape_enable=bone_capemgr.enable_partno=uio_pruss_enable
*modify am335x-boneblack-emmc-overlay.dt*b
#include "am33xx-pruss-uio.dtsi"
*modify /etc/modprobe.d/pruss-blacklist.con*f
blacklist pruss
blacklist pruss_intc
blacklist pru-rproc
*root@beaglebone:~# lsmod | grep pru*
uio_pruss 5504 0
uio 10524 2 uio_pruss,uio_pdrv_genirq
uname -a
4.4.30-ti-r64
*/sys/kernel/debug/pinctrl/44e10800.pinmux/pins*:
pin 15 (44e1083c.0) 00000027 pinctrl-single
*modified /opt/source/bb.org-overlays/src/arm/uio_pruss_enable-00A0.dts*
/dts-v1/;
/plugin/;
/ {
compatible = "ti,beaglebone", "ti,beaglebone-black",
"ti,beaglebone-green";
// identification
part-number = "uio_pruss_enable";
version = "00A0";
exclusive-use =
"P8.11", "pru0";
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__ {
pru_pru_pins: pinmux_pru_pru_pins {
pinctrl-single,pins = <
0x34 0x06
>;
};
};
};
fragment@1 {
target = <&ocp>;
__overlay__ {
test_helper: helper {
compatible = "bone-pinmux-helper";
pinctrl-names = "default";
pinctrl-0 = <&pru_pru_pins>;
status = "okay";
};
};
};
};
*compiled using: dtc -@ -O dtb -b 0 -o
/lib/firmware/uio_pruss_enable-00A0.dtbo
/opt/source/bb.org-overlays/src/arm/uio_pruss_enable-00A0.dts*
*dmesg*
[ 0.000000] Kernel command line: console=tty0 console=ttyO0,115200n8
bone_capemgr.enable_partno=uio_pruss_enable root=/dev/mmcblk0p1
rootfstype=ext4 rootwait coherent_pool=1M quiet cape_universal=enable
[ 2.531643] bone_capemgr bone_capemgr: enabled_partno PARTNO
'uio_pruss_enable' VER 'N/A' PR '0'
[ 2.531685] bone_capemgr bone_capemgr: slot #4: 'Override Board
Name,00A0,Override Manuf,uio_pruss_enable'
[ 2.538684] bone_capemgr bone_capemgr: slot #4: dtbo
'uio_pruss_enable-00A0.dtbo' loaded; overlay id #0
[ 40.091997] pruss_uio 4a300000.pruss: pins are not configured from the
driver
*root@beaglebone:~# cat /sys/devices/platform/bone_capemgr/slots*
0: PF---- -1
1: PF---- -1
2: PF---- -1
3: PF---- -1
4: P-O-L- 0 Override Board Name,00A0,Override Manuf,uio_pruss_enable
--
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/72a3557e-f282-4a45-b7b0-e968b54ce26c%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
