From 5b12933de4e76ec164031c18ce8e0904abf530d7 Mon Sep 17 00:00:00 2001
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Mon, 23 May 2022 17:18:33 +0200
Subject: [PATCH] can: m_can: m_can_chip_config(): actually enable internal timestamping
Git-commit: 5b12933de4e76ec164031c18ce8e0904abf530d7
Patch-mainline: v5.19-rc6
References: git-fixes

In commit df06fd678260 ("can: m_can: m_can_chip_config(): enable and
configure internal timestamps") the timestamping in the m_can core
should be enabled. In peripheral mode, the RX'ed CAN frames, TX
compete frames and error events are sorted by the timestamp.

The above mentioned commit however forgot to enable the timestamping.
Add the missing bits to enable the timestamp counter to the write of
the Timestamp Counter Configuration register.

Link: https://lore.kernel.org/all/20220612212708.4081756-1-mkl@pengutronix.de
Fixes: df06fd678260 ("can: m_can: m_can_chip_config(): enable and configure internal timestamps")
Cc: <stable@vger.kernel.org> # 5.13
Cc: Torin Cooper-Bennun <torin@maxiluxsystems.com>
Reviewed-by: Chandrasekar Ramakrishnan <rcsekar@samsung.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/can/m_can/m_can.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 5d0c82d8b9a9..03a22d493cf6 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -1351,7 +1351,9 @@ static void m_can_chip_config(struct net_device *dev)
 	/* enable internal timestamp generation, with a prescalar of 16. The
 	 * prescalar is applied to the nominal bit timing
 	 */
-	m_can_write(cdev, M_CAN_TSCC, FIELD_PREP(TSCC_TCP_MASK, 0xf));
+	m_can_write(cdev, M_CAN_TSCC,
+		    FIELD_PREP(TSCC_TCP_MASK, 0xf) |
+		    FIELD_PREP(TSCC_TSS_MASK, TSCC_TSS_INTERNAL));
 
 	m_can_config_endisable(cdev, false);
 
-- 
2.35.3