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serial: stm32f7: disable overrun

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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>
This commit is contained in:
Vikas Manocha 2017-05-28 12:55:12 -07:00 committed by Tom Rini
parent c6d9e9dbc3
commit 6c0c3ce8aa
2 changed files with 5 additions and 0 deletions
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3
drivers/serial/serial_stm32x7.c
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@ -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;

2
drivers/serial/serial_stm32x7.h
View File

@ -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)