Add management of Bit 1 of USART_ISR = FE: Framing error This bit is set by hardware when a de-synchronization, excessive noise or a break character is detected. It is cleared by software, writing 1 to the FECF bit in the USART_ICR register (for stm32 after f4).
Signed-off-by: Patrick Delaunay patrick.delaunay@st.com ---
drivers/serial/serial_stm32.c | 5 +++-- drivers/serial/serial_stm32.h | 2 ++ 2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/serial/serial_stm32.c b/drivers/serial/serial_stm32.c index 3ab536a..00a8e72 100644 --- a/drivers/serial/serial_stm32.c +++ b/drivers/serial/serial_stm32.c @@ -106,10 +106,11 @@ static int stm32_serial_getc(struct udevice *dev) if ((isr & USART_ISR_RXNE) == 0) return -EAGAIN;
- if (isr & (USART_ISR_PE | USART_ISR_ORE)) { + if (isr & (USART_ISR_PE | USART_ISR_ORE | USART_ISR_FE)) { if (!stm32f4) setbits_le32(base + ICR_OFFSET, - USART_ICR_PCECF | USART_ICR_ORECF); + USART_ICR_PCECF | USART_ICR_ORECF | + USART_ICR_FECF); else readl(base + RDR_OFFSET(stm32f4)); return -EIO; diff --git a/drivers/serial/serial_stm32.h b/drivers/serial/serial_stm32.h index 5549f8c..7b0c531 100644 --- a/drivers/serial/serial_stm32.h +++ b/drivers/serial/serial_stm32.h @@ -67,6 +67,7 @@ struct stm32x7_serial_platdata { #define USART_ISR_TXE BIT(7) #define USART_ISR_RXNE BIT(5) #define USART_ISR_ORE BIT(3) +#define USART_ISR_FE BIT(1) #define USART_ISR_PE BIT(0)
#define USART_BRR_F_MASK GENMASK(7, 0) @@ -74,6 +75,7 @@ struct stm32x7_serial_platdata { #define USART_BRR_M_MASK GENMASK(15, 4)
#define USART_ICR_ORECF BIT(3) +#define USART_ICR_FECF BIT(1) #define USART_ICR_PCECF BIT(0)
#endif