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| author | Erwan Le Ray <erwan.leray@foss.st.com> | 2023-09-06 18:15:47 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-18 12:14:42 +0300 |
| commit | 30e945861f3b46c4a5b25b861da40510a64cf9a4 (patch) | |
| tree | 9328de8464cae93031d97fc53d19e910e22f1dda /drivers/tty/serial/stm32-usart.c | |
| parent | 46c4699d07e65787d613b92c9fd499e3d44ea80d (diff) | |
| download | linux-30e945861f3b46c4a5b25b861da40510a64cf9a4.tar.xz | |
serial: stm32: add support for break control
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>
Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230906151547.840302-1-valentin.caron@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/stm32-usart.c')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.c | 13 |
1 files changed, 12 insertions, 1 deletions
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) |