linux-kernel - [PATCH 5.18 026/112] can: rcar_canfd: Fix data transmission failed on R-Car V3U

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Message-Id: <20220711090550.302308045@linuxfoundation.org>
Date:   Mon, 11 Jul 2022 11:06:26 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Duy Nguyen <duy.nguyen.rh@...esas.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 5.18 026/112] can: rcar_canfd: Fix data transmission failed on R-Car V3U

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

commit 374e11f1bde91545674233459e5a0416ba842b69 upstream.

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")
Link: https://lore.kernel.org/all/20220704074611.957191-1-yoshihiro.shimoda.uh@renesas.com
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
Signed-off-by: Duy Nguyen <duy.nguyen.rh@...esas.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/can/rcar/rcar_canfd.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -1334,7 +1334,10 @@ static void rcar_canfd_set_bittiming(str
 		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 {