diff options
| -rw-r--r-- | drivers/tty/serial/stm32-usart.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index bf83e6c212f5..6756f73fb220 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -688,8 +688,9 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios, unsigned int baud, bits; u32 usartdiv, mantissa, fraction, oversampling; tcflag_t cflag = termios->c_cflag; - u32 cr1, cr2, cr3; + u32 cr1, cr2, cr3, isr; unsigned long flags; + int ret; if (!stm32_port->hw_flow_control) cflag &= ~CRTSCTS; @@ -698,6 +699,15 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios, spin_lock_irqsave(&port->lock, flags); + ret = readl_relaxed_poll_timeout_atomic(port->membase + ofs->isr, + isr, + (isr & USART_SR_TC), + 10, 100000); + + /* Send the TC error message only when ISR_TC is not set. */ + if (ret) + dev_err(port->dev, "Transmission is not complete\n"); + /* Stop serial port and reset value */ writel_relaxed(0, port->membase + ofs->cr1); |