With overrun enabled, serial port console freezes & stops receiving data with overun error if we keep sending data.
Signed-off-by: Vikas Manocha vikas.manocha@st.com --- drivers/serial/serial_stm32x7.c | 3 +++ drivers/serial/serial_stm32x7.h | 2 ++ 2 files changed, 5 insertions(+)
diff --git a/drivers/serial/serial_stm32x7.c b/drivers/serial/serial_stm32x7.c index 1907cef..2b305cd 100644 --- a/drivers/serial/serial_stm32x7.c +++ b/drivers/serial/serial_stm32x7.c @@ -93,6 +93,9 @@ static int stm32_serial_probe(struct udevice *dev) } #endif
+ /* Disable usart-> disable overrun-> enable usart */ + clrbits_le32(&usart->cr1, USART_CR1_RE | USART_CR1_TE | USART_CR1_UE); + setbits_le32(&usart->cr3, USART_CR3_OVRDIS); setbits_le32(&usart->cr1, USART_CR1_RE | USART_CR1_TE | USART_CR1_UE);
return 0; diff --git a/drivers/serial/serial_stm32x7.h b/drivers/serial/serial_stm32x7.h index 6190d67..8c02548 100644 --- a/drivers/serial/serial_stm32x7.h +++ b/drivers/serial/serial_stm32x7.h @@ -27,6 +27,8 @@ struct stm32_usart { #define USART_CR1_TE (1 << 3) #define USART_CR1_UE (1 << 0)
+#define USART_CR3_OVRDIS (1 << 12) + #define USART_SR_FLAG_RXNE (1 << 5) #define USART_SR_FLAG_TXE (1 << 7)