[PATCH] can: rcar_canfd: Fix data transmission failed on R-Car V3U

From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
To: wg@grandegger.com, mkl@pengutronix.de
Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
	pabeni@redhat.com, linux-can@vger.kernel.org,
	netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
	Duy Nguyen <duy.nguyen.rh@renesas.com>,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Subject: [PATCH] can: rcar_canfd: Fix data transmission failed on R-Car V3U
Date: Mon,  4 Jul 2022 16:46:11 +0900	[thread overview]
Message-ID: <20220704074611.957191-1-yoshihiro.shimoda.uh@renesas.com> (raw)

From: Duy Nguyen <duy.nguyen.rh@renesas.com>

On R-Car V3U, this driver should use suitable register offset instead of
other SoCs' one. Otherwise, data transmission failed on R-Car V3U.

Fixes: 45721c406dcf ("can: rcar_canfd: Add support for r8a779a0 SoC")
Signed-off-by: Duy Nguyen <duy.nguyen.rh@renesas.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
 drivers/net/can/rcar/rcar_canfd.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index 40a11445d021..ba42cef10a53 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -1332,7 +1332,10 @@ static void rcar_canfd_set_bittiming(struct net_device *dev)
 		cfg = (RCANFD_DCFG_DTSEG1(gpriv, tseg1) | RCANFD_DCFG_DBRP(brp) |
 		       RCANFD_DCFG_DSJW(sjw) | RCANFD_DCFG_DTSEG2(gpriv, tseg2));
 
-		rcar_canfd_write(priv->base, RCANFD_F_DCFG(ch), cfg);
+		if (is_v3u(gpriv))
+			rcar_canfd_write(priv->base, RCANFD_V3U_DCFG(ch), cfg);
+		else
+			rcar_canfd_write(priv->base, RCANFD_F_DCFG(ch), cfg);
 		netdev_dbg(priv->ndev, "drate: brp %u, sjw %u, tseg1 %u, tseg2 %u\n",
 			   brp, sjw, tseg1, tseg2);
 	} else {
-- 
2.25.1

