On Tue, Sep 22, 2020 at 1:46 PM Andrei Borzenkov <[email protected]> wrote:
> On Tue, Sep 22, 2020 at 1:35 PM ZhouPeng <[email protected]> wrote: > > > > 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** > > systemd only monitors for devices with "sysemd" tag. Tags are assigned > by udev rules. You should add rule to assign tag to ttyPS0. I have no > idea what it is, but something like > > ACTION!="remove", KERNEL=="ttyPS0", TAG+="systemd" > > should do it. Whether this should go upstream depends on how common > this device is. Well yes, but that should have been already covered by the existing upstream rules: 99-systemd.rules:12:SUBSYSTEM=="tty", KERNEL=="*tty[a-zA-Z]**|hvc*|xvc*|hvsi*|ttysclp*|sclp_line*|3270/tty[0-9]*", TAG+="systemd" -- Mantas Mikulėnas
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