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tty: serial: allow ports to override the irq handler 

Some serial ports may have unusal requirements for interrupt handling
(e.g. the Synopsys DesignWare 8250-alike port and it's busy detect
interrupt).  Add a .handle_irq callback that can be used for platforms
to override the interrupt behaviour in a similar fashion to the
.serial_out and .serial_in callbacks.

Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jamie Iles 2011-08-15 10:17:51 +01:00 committed by Greg Kroah-Hartman
parent 2a8d7bddf2
commit a74036f512
1 changed files with 1 additions and 0 deletions
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include/linux/serial_core.h
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@ -300,6 +300,7 @@ struct uart_port {
void (*set_termios)(struct uart_port *,
struct ktermios *new,
struct ktermios *old);
int (*handle_irq)(struct uart_port *);
void (*pm)(struct uart_port *, unsigned int state,
unsigned int old);
unsigned int irq; /* irq number */