Driver: Serial STM32: Fix use of TXE IRQ

Benichou34 · galak · commit 2a1c94cbc373 · 2019-01-23T04:30:58.000-06:00
In case of TX IRQ pending,
uart_stm32_irq_is_pending() function always return 0,
because "is TXE enabled ?" is checked instead of "is TC enabled ?".

Signed-off-by: Benoit Leforestier &lt;benoit.leforestier@gmail.com&gt;
diff --git a/drivers/serial/uart_stm32.c b/drivers/serial/uart_stm32.c
@@ -538,8 +538,8 @@ static int uart_stm32_irq_is_pending(struct device *dev)
 
 	return ((LL_USART_IsActiveFlag_RXNE(UartInstance) &&
 		 LL_USART_IsEnabledIT_RXNE(UartInstance)) ||
-		(LL_USART_IsActiveFlag_TXE(UartInstance) &&
-		 LL_USART_IsEnabledIT_TXE(UartInstance)));
+		(LL_USART_IsActiveFlag_TC(UartInstance) &&
+		 LL_USART_IsEnabledIT_TC(UartInstance)));
 }
 
 static int uart_stm32_irq_update(struct device *dev)

Original file line number	Diff line number	Diff line change
`@@ -538,8 +538,8 @@ static int uart_stm32_irq_is_pending(struct device *dev)`
`538`	`538`
`539`	`539`	`return ((LL_USART_IsActiveFlag_RXNE(UartInstance) &&`
`540`	`540`	`LL_USART_IsEnabledIT_RXNE(UartInstance)) \|\|`
`541`		`- (LL_USART_IsActiveFlag_TXE(UartInstance) &&`
`542`		`- LL_USART_IsEnabledIT_TXE(UartInstance)));`
	`541`	`+ (LL_USART_IsActiveFlag_TC(UartInstance) &&`
	`542`	`+ LL_USART_IsEnabledIT_TC(UartInstance)));`
`543`	`543`	`}`
`544`	`544`
`545`	`545`	`static int uart_stm32_irq_update(struct device *dev)`