diff options
| author | Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> | 2016-04-27 10:40:10 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-30 09:26:55 -0700 |
| commit | fa01e2ca9f531b4a5693469a196eb1574b8d7d8a (patch) | |
| tree | 3f43beffb9efaeedcc35db48c1a5a010482bdfa6 /drivers/tty/serial/8250/8250_port.c | |
| parent | bd8d257fa3371a284568b8ee04c2bcf4757238ed (diff) | |
serial: 8250: Integrate Fintek into 8250_base
The 8250_fintek driver advertises as the PNP0501 driver; however this
conflicts with the standard 16550A uart PNP0501. The conflict causes
the 8250_fintek driver to load with _every_ PNP0501, but never probe,
and causing the entire 8250 driver stack to unload if the 8250_fintek
driver is unloaded (modprobe doesn't know that 8250_pnp rather than
8250_fintek claimed the resource).
This patch merges the Fintek driver into 8250_base. On autoconfig_16550
the device is probed to verify if it is a FINTEK device or not.
This custom probing can be disabled completely via configuration. When a
Fintek device is not probed it will behave as a standard 16550A device,
with no RS485 capabilities.
Reported-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250/8250_port.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 215e8da78a06..d4036038a4dd 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -1315,6 +1315,13 @@ static void autoconfig(struct uart_8250_port *up) out_lock: spin_unlock_irqrestore(&port->lock, flags); + + /* + * Check if the device is a Fintek F81216A + */ + if (port->type == PORT_16550A) + fintek_8250_probe(up); + if (up->capabilities != old_capabilities) { pr_warn("ttyS%d: detected caps %08x should be %08x\n", serial_index(port), old_capabilities, |