imx9/flexcan: Add disable/enable cycle

Add enable/disable cycle to initialize function to speed up soft reset Signed-off-by: Jouni Ukkonen <[email protected]>
tiiuae · Oct 29, 2024 · c18f971 · c18f971
1 parent 289c3a8
commit c18f971
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/arch/arm64/src/imx9/imx9_flexcan.c b/arch/arm64/src/imx9/imx9_flexcan.c
@@ -2051,6 +2051,12 @@ int imx9_caninitialize(int intf)
       return -EAGAIN;
     }
 
+  /* Disable - enable cycle */
+
+  modifyreg32(priv->base + IMX9_CAN_MCR_OFFSET, 0, CAN_MCR_MDIS);
+  up_udelay(100);
+  modifyreg32(priv->base + IMX9_CAN_MCR_OFFSET, CAN_MCR_MDIS, 0);
+
   /* Initialize the driver structure */
 
   priv->dev.d_ifup    = imx9_ifup;      /* I/F up (new IP address) callback */