arch/arm64/imx9: Reset rx fifo in mode change

Signed-off-by: Jouni Ukkonen <[email protected]>
tiiuae · Nov 7, 2024 · 3c83a72 · 3c83a72
1 parent 27ee0b4
commit 3c83a72
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/arch/arm64/src/imx9/imx9_lpspi.c b/arch/arm64/src/imx9/imx9_lpspi.c
@@ -1024,7 +1024,10 @@ static void imx9_lpspi_setmode(struct spi_dev_s *dev, enum spi_mode_e mode)
       while ((imx9_lpspi_getreg32(priv, IMX9_LPSPI_RSR_OFFSET) &
               LPSPI_RSR_RXEMPTY) != LPSPI_RSR_RXEMPTY)
         {
-          /* Flush SPI read FIFO */
+          /* Reset SPI read FIFO */
+
+          imx9_lpspi_modifyreg32(priv, IMX9_LPSPI_CR_OFFSET, 0,
+                                   LPSPI_CR_RRF);
 
           imx9_lpspi_getreg32(priv, IMX9_LPSPI_RSR_OFFSET);
         }