diff options
Diffstat (limited to 'drivers/staging/greybus/uart.c')
| -rw-r--r-- | drivers/staging/greybus/uart.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c index 44d8b9ad183a..c257fbf40b79 100644 --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -604,6 +604,22 @@ static int gb_tty_ioctl(struct tty_struct *tty, unsigned int cmd, return -ENOIOCTLCMD; } +static void gb_tty_dtr_rts(struct tty_port *port, int on) +{ + struct gb_tty *gb_tty; + u8 newctrl; + + gb_tty = container_of(port, struct gb_tty, port); + newctrl = gb_tty->ctrlout; + + if (on) + newctrl |= (GB_UART_CTRL_DTR | GB_UART_CTRL_RTS); + else + newctrl &= ~(GB_UART_CTRL_DTR | GB_UART_CTRL_RTS); + + gb_tty->ctrlout = newctrl; + send_control(gb_tty, newctrl); +} static const struct tty_operations gb_ops = { .install = gb_tty_install, @@ -623,7 +639,9 @@ static const struct tty_operations gb_ops = { .tiocmset = gb_tty_tiocmset, }; -static struct tty_port_operations null_ops = { }; +static struct tty_port_operations gb_port_ops = { + .dtr_rts = gb_tty_dtr_rts, +}; static int gb_uart_probe(struct gbphy_device *gbphy_dev, const struct gbphy_device_id *id) @@ -681,7 +699,7 @@ static int gb_uart_probe(struct gbphy_device *gbphy_dev, mutex_init(&gb_tty->mutex); tty_port_init(&gb_tty->port); - gb_tty->port.ops = &null_ops; + gb_tty->port.ops = &gb_port_ops; gb_tty->connection = connection; gb_tty->gbphy_dev = gbphy_dev; |