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serial: bfin-uart: Remove ASYNC_CTS_FLOW flag for hardware automatic CTS.

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Blackfin uart supports automatic CTS trigger when hardware flow control is enabled.
No need to start and top tx in CTS interrupt. So, remote ASYNC_CTS_FLOW flag.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sonic Zhang 2011-12-13 12:22:02 +08:00 committed by Greg Kroah-Hartman
parent b48dc711c3
commit 64851636d5
1 changed files with 14 additions and 3 deletions
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17
drivers/tty/serial/bfin_uart.c
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@ -116,11 +116,20 @@ static void bfin_serial_set_mctrl(struct uart_port *port, unsigned int mctrl)
static irqreturn_t bfin_serial_mctrl_cts_int(int irq, void *dev_id)
{
struct bfin_serial_port *uart = dev_id;
unsigned int status;
status = bfin_serial_get_mctrl(&uart->port);
unsigned int status = bfin_serial_get_mctrl(&uart->port);
#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
struct tty_struct *tty = uart->port.state->port.tty;
UART_CLEAR_SCTS(uart);
if (tty->hw_stopped) {
if (status) {
tty->hw_stopped = 0;
uart_write_wakeup(&uart->port);
}
} else {
if (!status)
tty->hw_stopped = 1;
}
#endif
uart_handle_cts_change(&uart->port, status & TIOCM_CTS);
@ -1358,7 +1367,9 @@ static int bfin_serial_probe(struct platform_device *pdev)
uart->cts_pin = -1;
else {
uart->cts_pin = res->start;
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
uart->port.flags |= ASYNC_CTS_FLOW;
#endif
}
res = platform_get_resource(pdev, IORESOURCE_IO, 1);