linux-kernel - [PATCH] can: flexcan: switch the i.MX series to timestamp based rx-offload

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Date:   Sun,  2 Jan 2022 16:58:13 +0100
From:   Dario Binacchi <dario.binacchi@...rulasolutions.com>
To:     linux-kernel@...r.kernel.org
Cc:     Dario Binacchi <dario.binacchi@...rulasolutions.com>,
        Michael Nazzareno Trimarchi <michael@...rulasolutions.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        linux-can@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH] can: flexcan: switch the i.MX series to timestamp based rx-offload

As explained by commit b3cf53e988ce ("can: flexcan: add support for
timestamp based rx-offload"), the controller has 64 message buffers but
it uses only 6 for reception. Enabling timestamp mode, instead of FIFO,
allows you to use the maximum number of messages for reception.

Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
Signed-off-by: Michael Nazzareno Trimarchi <michael@...rulasolutions.com>

---

 drivers/net/can/flexcan.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index 12b60ad95b02..40a6611b5d6e 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -397,11 +397,13 @@ static const struct flexcan_devtype_data fsl_p1010_devtype_data = {
 
 static const struct flexcan_devtype_data fsl_imx25_devtype_data = {
 	.quirks = FLEXCAN_QUIRK_BROKEN_WERR_STATE |
-		FLEXCAN_QUIRK_BROKEN_PERR_STATE,
+		FLEXCAN_QUIRK_BROKEN_PERR_STATE |
+		FLEXCAN_QUIRK_USE_OFF_TIMESTAMP,
 };
 
 static const struct flexcan_devtype_data fsl_imx28_devtype_data = {
-	.quirks = FLEXCAN_QUIRK_BROKEN_PERR_STATE,
+	.quirks = FLEXCAN_QUIRK_BROKEN_PERR_STATE |
+		FLEXCAN_QUIRK_USE_OFF_TIMESTAMP,
 };
 
 static const struct flexcan_devtype_data fsl_imx6q_devtype_data = {
-- 
2.32.0