diff options
Diffstat (limited to 'drivers/tty/serial/mpc52xx_uart.c')
| -rw-r--r-- | drivers/tty/serial/mpc52xx_uart.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c index 41de374d9784..8c3e51314470 100644 --- a/drivers/tty/serial/mpc52xx_uart.c +++ b/drivers/tty/serial/mpc52xx_uart.c @@ -1135,6 +1135,13 @@ mpc52xx_uart_startup(struct uart_port *port) psc_ops->command(port, MPC52xx_PSC_RST_RX); psc_ops->command(port, MPC52xx_PSC_RST_TX); + /* + * According to Freescale's support the RST_TX command can produce a + * spike on the TX pin. So they recommend to delay "for one character". + * One millisecond should be enough for everyone. + */ + msleep(1); + psc_ops->set_sicr(port, 0); /* UART mode DCD ignored */ psc_ops->fifo_init(port); |