diff options
| author | Manuel Lauss <manuel.lauss@gmail.com> | 2026-04-30 15:58:22 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-05-11 16:55:49 +0200 |
| commit | 49fa670efdfdd27e29145cbd2beef065c08717ef (patch) | |
| tree | 69336914d3f81d871370bced6d3a0475c1328f5d /drivers/tty | |
| parent | a23907d034dbe92915b7af2de18c5d7faac0c0b1 (diff) | |
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>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index af78cc02f38e..02e6cdefdbac 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -458,6 +458,8 @@ static void set_io_from_upio(struct uart_port *p) p->serial_out = io_serial_out; break; #endif + case UPIO_AU: + break; default: WARN(p->iotype != UPIO_PORT || p->iobase, "Unsupported UART type %x\n", p->iotype); |