diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2014-09-05 21:02:37 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-09 01:32:36 +0200 |
| commit | b99b121b2aa42e60e5b73fdd3a49863337839c7b (patch) | |
| tree | 99ea90710937cf97b3c534f4aeada8e1d337a921 /drivers/tty/serial | |
| parent | tty: serial: 8250_core: provide a function to export uart_8250_port (diff) | |
| download | linux-b99b121b2aa42e60e5b73fdd3a49863337839c7b.tar.xz linux-b99b121b2aa42e60e5b73fdd3a49863337839c7b.zip | |
tty: serial: 8250_core: allow to overwrite & export serial8250_startup()
The OMAP version of the 8250 can actually use 1:1 serial8250_startup().
However it needs to be extended by a wake up irq which should to be
requested & enabled at ->startup() time and disabled at ->shutdown() time.
v2…v3: properly copy callbacks
v1…v2: add shutdown callback
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/8250/8250_core.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 90e0d5e2b7ee..872c020607a8 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -1930,7 +1930,7 @@ static void serial8250_put_poll_char(struct uart_port *port, #endif /* CONFIG_CONSOLE_POLL */ -static int serial8250_startup(struct uart_port *port) +int serial8250_do_startup(struct uart_port *port) { struct uart_8250_port *up = up_to_u8250p(port); unsigned long flags; @@ -2181,8 +2181,16 @@ dont_test_tx_en: return 0; } +EXPORT_SYMBOL_GPL(serial8250_do_startup); -static void serial8250_shutdown(struct uart_port *port) +static int serial8250_startup(struct uart_port *port) +{ + if (port->startup) + return port->startup(port); + return serial8250_do_startup(port); +} + +void serial8250_do_shutdown(struct uart_port *port) { struct uart_8250_port *up = up_to_u8250p(port); unsigned long flags; @@ -2232,6 +2240,15 @@ static void serial8250_shutdown(struct uart_port *port) if (port->irq) serial_unlink_irq_chain(up); } +EXPORT_SYMBOL_GPL(serial8250_do_shutdown); + +static void serial8250_shutdown(struct uart_port *port) +{ + if (port->shutdown) + port->shutdown(port); + else + serial8250_do_shutdown(port); +} static unsigned int serial8250_get_divisor(struct uart_port *port, unsigned int baud) { @@ -3466,6 +3483,10 @@ int serial8250_register_8250_port(struct uart_8250_port *up) /* Possibly override set_termios call */ if (up->port.set_termios) uart->port.set_termios = up->port.set_termios; + if (up->port.startup) + uart->port.startup = up->port.startup; + if (up->port.shutdown) + uart->port.shutdown = up->port.shutdown; if (up->port.pm) uart->port.pm = up->port.pm; if (up->port.handle_break) |