commit e54d2553f37678e26d03069ef8d7ac1a1bbbe43f
author Ron Smith <rockyowl171@gmail.com> Sun Aug 29 20:24:59 2021 -0400
committer Carles Cufí <carles.cufi@nordicsemi.no> Wed Sep 01 11:50:51 2021 +0200
tree 5e66963a0ed6e83ca4d44ab54cf041c0bc13c86a
parent 18830991e184b3ef9b291b2e65a95fc8631d15ee

drivers: serial: uart_sam0: Correct check for interrupts enabled

Fixes the issue where uart_sam0_irq_tx_ready would return true if
the INTFLAG was set even though the INTSET bit for the given
interrupt was not enabled yet through uart_sam0_irq_tx_enable.

Signed-off-by: Ron Smith <rockyowl171@gmail.com>

drivers/serial/uart_sam0.c

diff --git a/drivers/serial/uart_sam0.c b/drivers/serial/uart_sam0.c
index 1b5d9ca..a9a770c 100644
--- a/drivers/serial/uart_sam0.c
+++ b/drivers/serial/uart_sam0.c
@@ -754,7 +754,7 @@
 {
 	SercomUsart * const regs = DEV_CFG(dev)->regs;
 
-	return regs->INTFLAG.bit.DRE != 0;
+	return (regs->INTFLAG.bit.DRE != 0) && (regs->INTENSET.bit.DRE != 0);
 }
 
 static void uart_sam0_irq_rx_enable(const struct device *dev)