diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_core.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_core.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 264054fe8a66..5914e7a9ed5a 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -1601,6 +1601,24 @@ static int serial8250_tegra_handle_irq(struct uart_port *port) return 1; } +#ifdef CONFIG_ARCH_TEGRA +void tegra_serial_handle_break(struct uart_port *p) +{ + unsigned int status, tmout = 10000; + + do { + status = p->serial_in(p, UART_LSR); + if (status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS)) + status = p->serial_in(p, UART_RX); + else + break; + if (--tmout == 0) + break; + udelay(1); + } while (1); +} +#endif + /* * These Exar UARTs have an extra interrupt indicator that could * fire for a few unimplemented interrupts. One of which is a @@ -2761,6 +2779,9 @@ static void serial8250_config_port(struct uart_port *port, int flags) if (port->type == PORT_TEGRA) { up->bugs |= UART_BUG_NOMSR; port->handle_irq = serial8250_tegra_handle_irq; +#if defined CONFIG_ARCH_TEGRA + port->handle_break = tegra_serial_handle_break; +#endif } if (port->type != PORT_UNKNOWN && flags & UART_CONFIG_IRQ) |