openwrt/target/linux/layerscape/patches-5.4/802-can-0017-can-flexcan-flexcan_mailbox_read-make-use-of-flexcan.patch

From 6340760d0671e92b15ff92b7eda41bbdd9702437 Mon Sep 17 00:00:00 2001
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Fri, 1 Mar 2019 16:27:59 +0100
Subject: [PATCH] can: flexcan: flexcan_mailbox_read() make use of
 flexcan_write64() to mark the mailbox as read

In the previous patch the function flexcan_write64() was introduced.

This patch replaces the open coded variant in flexcan_mailbox_read()
that marks a mailbox as read, by a single call to flexcan_write64().

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/flexcan.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -884,15 +884,10 @@ static struct sk_buff *flexcan_mailbox_r
 	}
 
  mark_as_read:
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) {
-		/* Clear IRQ */
-		if (n < 32)
-			priv->write(BIT(n), &regs->iflag1);
-		else
-			priv->write(BIT(n - 32), &regs->iflag2);
-	} else {
+	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)
+		flexcan_write64(priv, FLEXCAN_IFLAG_MB(n), &regs->iflag1);
+	else
 		priv->write(FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, &regs->iflag1);
-	}
 
 	/* Read the Free Running Timer. It is optional but recommended
 	 * to unlock Mailbox as soon as possible and make it available