With overrun enabled, serial port console freezes & stops receiving data with
overun error if we keep sending data.
Signed-off-by: Vikas Manocha <vikas.mano...@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)
--
1.9.1
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