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

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Message-Id: <20220704074611.957191-1-yoshihiro.shimoda.uh@renesas.com>
Date:   Mon,  4 Jul 2022 16:46:11 +0900
From:   Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
To:     wg@...ndegger.com, mkl@...gutronix.de
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, linux-can@...r.kernel.org,
        netdev@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Duy Nguyen <duy.nguyen.rh@...esas.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Subject: [PATCH] can: rcar_canfd: Fix data transmission failed on R-Car V3U

From: Duy Nguyen <duy.nguyen.rh@...esas.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@...esas.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.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