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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>
This commit is contained in:
Maarten Brock 2019-11-25 18:45:30 +05:30 committed by Greg Kroah-Hartman
parent 422c6d3b09
commit 6d8bf787a6
1 changed files with 9 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/tty/serial/xilinx_uartps.c
View File

@ -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