diff options
| author | Maarten Brock <m.brock@vanmierlo.com> | 2019-11-25 16:15:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-14 16:34:04 +0300 |
| commit | 6d8bf787a6ad04442307088e1a5352ee448cab45 (patch) | |
| tree | d4294c9ecf8476a53d88949aef7f495450b3fa7f /drivers | |
| parent | 422c6d3b09afb187b5aeedc3a99d759703023be0 (diff) | |
| download | linux-6d8bf787a6ad04442307088e1a5352ee448cab45.tar.xz | |
serial: xilinx_uartps: set_termios sets flowcontrol
Let set_termios enable/disable automatic flow control.
set_mctrl should not touch automatic flow control.
Signed-off-by: Maarten Brock <m.brock@vanmierlo.com>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Link: https://lore.kernel.org/r/1574687731-21563-2-git-send-email-shubhrajyoti.datta@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/xilinx_uartps.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index f33b89587786..958c3b4712fb 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -690,7 +690,7 @@ static void cdns_uart_break_ctl(struct uart_port *port, int ctl) static void cdns_uart_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { - unsigned int cval = 0; + u32 cval = 0; unsigned int baud, minbaud, maxbaud; unsigned long flags; unsigned int ctrl_reg, mode_reg, val; @@ -811,6 +811,13 @@ static void cdns_uart_set_termios(struct uart_port *port, cval |= mode_reg & 1; writel(cval, port->membase + CDNS_UART_MR); + cval = readl(port->membase + CDNS_UART_MODEMCR); + if (termios->c_cflag & CRTSCTS) + cval |= CDNS_UART_MODEMCR_FCM; + else + cval &= ~CDNS_UART_MODEMCR_FCM; + writel(cval, port->membase + CDNS_UART_MODEMCR); + spin_unlock_irqrestore(&port->lock, flags); } @@ -1045,12 +1052,9 @@ static void cdns_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) val = readl(port->membase + CDNS_UART_MODEMCR); mode_reg = readl(port->membase + CDNS_UART_MR); - val &= ~(CDNS_UART_MODEMCR_RTS | CDNS_UART_MODEMCR_DTR | - CDNS_UART_MODEMCR_FCM); + val &= ~(CDNS_UART_MODEMCR_RTS | CDNS_UART_MODEMCR_DTR); mode_reg &= ~CDNS_UART_MR_CHMODE_MASK; - if (mctrl & TIOCM_RTS || mctrl & TIOCM_DTR) - val |= CDNS_UART_MODEMCR_FCM; if (mctrl & TIOCM_LOOP) mode_reg |= CDNS_UART_MR_CHMODE_L_LOOP; else |