On 3/1/21 11:28 AM, Fabrice Gasnier wrote:
On 2/27/21 5:41 PM, Martin Devera wrote:
STM32 F7/H7 usarts supports RX & TX pin swapping.
Add option to turn it on.
Tested on STM32MP157.
Signed-off-by: Martin Devera <devik@xxxxxxxxxx>
---
drivers/tty/serial/stm32-usart.c | 3 ++-
drivers/tty/serial/stm32-usart.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index b3675cf25a69..3650c8798061 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -758,7 +758,7 @@ static void stm32_usart_set_termios(struct uart_port *port,
cr1 = USART_CR1_TE | USART_CR1_RE;
if (stm32_port->fifoen)
cr1 |= USART_CR1_FIFOEN;
- cr2 = 0;
+ cr2 = stm32_port->swap ? USART_CR2_SWAP : 0;
Hi Martin,
Same could be done in the startup routine, that enables the port for
reception (as described in Documentation/driver-api/serial/driver.rst)
Hello Fabrice,
I already incorporated all your comments but I'm struggling with the one
above.
The code must be in stm32_usart_set_termios too, because CR2 is modified.
What is the reason to have it in startup() ?
Is it because USART can be started without calling set_termios at all ? Like
to reuse bootloader's last settings ?
Thanks, Martin
