diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_exar.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_exar.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c index 597eb9d16f21..108cd55f9c4d 100644 --- a/drivers/tty/serial/8250/8250_exar.c +++ b/drivers/tty/serial/8250/8250_exar.c @@ -166,6 +166,23 @@ static void xr17v35x_set_divisor(struct uart_port *p, unsigned int baud, serial_port_out(p, 0x2, quot_frac); } +static int xr17v35x_startup(struct uart_port *port) +{ + /* + * First enable access to IER [7:5], ISR [5:4], FCR [5:4], + * MCR [7:5] and MSR [7:0] + */ + serial_port_out(port, UART_XR_EFR, UART_EFR_ECB); + + /* + * Make sure all interrups are masked until initialization is + * complete and the FIFOs are cleared + */ + serial_port_out(port, UART_IER, 0); + + return serial8250_do_startup(port); +} + static void exar_shutdown(struct uart_port *port) { unsigned char lsr; @@ -212,6 +229,8 @@ static int default_setup(struct exar8250 *priv, struct pci_dev *pcidev, port->port.get_divisor = xr17v35x_get_divisor; port->port.set_divisor = xr17v35x_set_divisor; + + port->port.startup = xr17v35x_startup; } else { port->port.type = PORT_XR17D15X; } |