On Sat, May 12, 2018 at 12:19:08PM +0200, Maarten Brock wrote: > On 2018-05-12 11:14, Maarten Brock wrote: > > Hello list, > > > > I have a question about the 8250 driver when used with a device-tree. > > I have a system with a xuartps and eight ns16550 compatible devices. > > The xuartps is the primary console and has a serial0 alias which gives > > it > > /dev/ttyPS0. > > This makes it impossible to give the serial0 alias to one of the > > ns16550's. > > I can enter serial1..serial8 in the device-tree, but serial8 is ignored > > and > > the last ns16550 gets /dev/ttyS0. > > > > How am I supposed to properly fix the uarts to a device name? > > > > Kind Regards, > > Maarten Brock > > A small follow-up: > > The above where the last ns16550 gets /dev/ttyS0 is not consistent. > If it is found after the xuartps and before the first ns16550 it will take > /dev/ttyS1. At least that's what I think that happens. The result is that > all other ns16550 are also not in their specified place. > > I have no control over the order of things inside the 'generated' > device-tree. If you have no control, then use persistant names, look in /dev/serial/ for the ones that udev automatically creates for things like this. Those should map to a physical path or something else that you can "uniquely" describe the serial ports. Hope this helps, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
