commit 3a6b46e26306a08ece34f55eaad7d2e3d82aafe6
author Yaël Boutreux <yael.boutreux@st.com> Wed Jul 31 13:48:32 2019 +0200
committer Kumar Gala <kumar.gala@gmail.com> Wed Jul 31 10:30:44 2019 -0400
tree 5a8a6a006a48729e760ef47ce36005e27b0b55cf
parent a56695db9a123ef70a3a9f31db421777b53fb396

drivers: spi: spi_ll_stm32: Fix uncleared MODF flag

Clear raised MODF flag, if not done the flag stay set forever.

Fixes https://github.com/zephyrproject-rtos/zephyr/issues/17363

Signed-off-by: Yaël Boutreux <yael.boutreux@st.com>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

drivers/spi/spi_ll_stm32.c

diff --git a/drivers/spi/spi_ll_stm32.c b/drivers/spi/spi_ll_stm32.c
index d7383ca..8a5beae 100644
--- a/drivers/spi/spi_ll_stm32.c
+++ b/drivers/spi/spi_ll_stm32.c
@@ -196,6 +196,10 @@
 			/* NOP */
 		}
 	}
+	/* BSY flag is cleared when MODF flag is raised */
+	if (LL_SPI_IsActiveFlag_MODF(spi)) {
+		LL_SPI_ClearFlag_MODF(spi);
+	}
 
 	LL_SPI_Disable(spi);