Messages in this thread Patch in this message | | | From | Valentin Caron <> | Subject | [PATCH] serial: stm32: add support for break control | Date | Wed, 6 Sep 2023 17:15:47 +0200 |
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From: Erwan Le Ray <erwan.leray@foss.st.com>
Add support for break control to the stm32 serial driver.
Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com> Signed-off-by: Valentin Caron <valentin.caron@foss.st.com> --- drivers/tty/serial/stm32-usart.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index 5e9cf0c48813..d03ec69d79fc 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -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) -- 2.25.1
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