Manuel Lauss 49fa670efd
serial: 8250_port: recognize UPIO_AU ...
My MIPS Alchemy systems generate the following warning during
probe of the 8250 driver:
WARNING: drivers/tty/serial/8250/8250_port.c:462 at set_io_from_upio+0xfc/0x124, CPU#0: swapper/0/1
Unsupported UART type 4
[...]
[<80521d40>] set_io_from_upio+0xfc/0x124
[<80521dfc>] serial8250_set_defaults+0x94/0xe0
[<80520fb4>] serial8250_register_8250_port+0x288/0x51c
[<805214ec>] serial8250_probe+0x160/0x1e8
[<8053b5f0>] platform_probe+0x64/0x90
The least invasive fix is to recognize UPIO_AU (type 4) in set_io_from_upio()
and do nothing, since all parameters have already been set up in
8250_rt288x.c::au_platform_setup().
Run-tested on Alchemy Au1300 platform.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com >
Link: https://patch.msgid.link/20260430135822.905035-1-manuel.lauss@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
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49fa670efd