Hi all,
When I use Fedora image as rootfs on Xilinx PYNQ-Z2, I encountered the issue
when use the /dev/ttyPS0.
I think the issue is because systemd and udev on fedora can didn't detect
ttyPS0 properly. Do I need to install any other package or do some special
configuration?
**systemd version the issue has been seen with**
udevadm --version
237
systemd-udev.riscv64 237-1.0.riscv64.fc28
**Unexpected behaviour you saw**
We can see ttyPS0 boots ok in the kernel boot period:
[ 0.180000] console [ttyPS0] enabledat MMIO 0xe0000000 (irq = 2, base_baud =
6250000) is a xuartps
[ 0.180000] console [ttyPS0] enabled
But, when boot into systemd, it failed on dev ttyPS0:
[ TIME ] Timed out waiting for device dev-ttyPS0.device. // **here**
[DEPEND] Dependency failed for Serial Getty on ttyPS0. // **here**
[ OK ] Started Rebuild Hardware Database.
Starting Update is Completed...
Starting udev Kernel Device Manager...
[ OK ] Started Update is Completed.
[ OK ] Started udev Kernel Device Manager.
I found there was a similar issue
https://github.com/systemd/systemd/issues/3446 which is on Ubuntu, and @jeras
reported it can be fixed by 'apt get install udev' on Ubuntu, But on Fedora 28
(Rawhide) and the latest version, I searched there is no udev package now,
there is only
systemd-udev package, and the systemd-udev is installed. So I didn't find a
way to fix this issue.
**Steps to reproduce the problem**
Boot the Fedora 28 (Rawhide) using Linux kernel version 4.18 (or newer), with
kernel bootargs as below
Kernel command line: console=ttyPS0,115200n8 root=/dev/mmcblk0p2
rootfstype=ext4 rw rootwait earlycon clk_ignore_unused
Appreciate for any reply. Thanks in advance.
Best,
--
Peng Zhou
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