Commit 30e94586 authored by Erwan Le Ray's avatar Erwan Le Ray Committed by Greg Kroah-Hartman
Browse files

serial: stm32: add support for break control 



Add support for break control to the stm32 serial driver.

Signed-off-by: default avatarErwan Le Ray <erwan.leray@foss.st.com>
Signed-off-by: default avatarValentin Caron <valentin.caron@foss.st.com>
Reviewed-by: default avatarJiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230906151547.840302-1-valentin.caron@foss.st.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 46c4699d

drivers/tty/serial/stm32-usart.c

+12 −1
Original line number Diff line number Diff line
@@ -1047,9 +1047,20 @@ static void stm32_usart_stop_rx(struct uart_port *port) 
		stm32_usart_clr_bits(port, ofs->cr3, stm32_port->cr3_irq);

}



/* Handle breaks - ignored by us */

static void stm32_usart_break_ctl(struct uart_port *port, int break_state)

{

	struct stm32_port *stm32_port = to_stm32_port(port);

	const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;

	unsigned long flags;



	spin_lock_irqsave(&port->lock, flags);



	if (break_state)

		stm32_usart_set_bits(port, ofs->rqr, USART_RQR_SBKRQ);

	else

		stm32_usart_clr_bits(port, ofs->rqr, USART_RQR_SBKRQ);



	spin_unlock_irqrestore(&port->lock, flags);

}



static int stm32_usart_startup(struct uart_port *port)