diff options
| author | Axel Haslam <ahaslam@baylibre.com> | 2016-05-31 14:36:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2016-05-31 17:18:18 -0700 |
| commit | e55c25206d5c99b12443eec37b4832d6817170ba (patch) | |
| tree | ba7883cb7e9c75e45cc002958326a59413db8872 /drivers/staging/greybus/uart.c | |
| parent | 12823178332216daa76512d256dbdacb5ba76ea7 (diff) | |
greybus: uart: Handle CRTSCTS flag in termios
Handle the CRTSCTS flag in set_termios, so that auto
flow control can be turned off. For this, add a new flag
in the line coding request specifically for this purpose.
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'drivers/staging/greybus/uart.c')
| -rw-r--r-- | drivers/staging/greybus/uart.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c index 5d8f4e8095d9..44d8b9ad183a 100644 --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -39,6 +39,7 @@ struct gb_tty_line_coding { __u8 format; __u8 parity; __u8 data_bits; + __u8 flow_control; }; struct gb_tty { @@ -375,9 +376,9 @@ static void gb_tty_set_termios(struct tty_struct *tty, if (C_BAUD(tty) == B0) { newline.rate = gb_tty->line_coding.rate; - newctrl &= ~GB_UART_CTRL_DTR; + newctrl &= ~(GB_UART_CTRL_DTR | GB_UART_CTRL_RTS); } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { - newctrl |= GB_UART_CTRL_DTR; + newctrl |= (GB_UART_CTRL_DTR | GB_UART_CTRL_RTS); } if (newctrl != gb_tty->ctrlout) { @@ -385,6 +386,11 @@ static void gb_tty_set_termios(struct tty_struct *tty, send_control(gb_tty, newctrl); } + if (C_CRTSCTS(tty) && C_BAUD(tty) != B0) + newline.flow_control |= GB_SERIAL_AUTO_RTSCTS_EN; + else + newline.flow_control &= ~GB_SERIAL_AUTO_RTSCTS_EN; + if (memcmp(&gb_tty->line_coding, &newline, sizeof(newline))) { memcpy(&gb_tty->line_coding, &newline, sizeof(newline)); send_line_coding(gb_tty); |