can: rcar_canfd: Fix R-Car Gen4 DCFG.DSJW field width

On R-Car Gen4 CAN_FD variants, the Data Bit Rate Resynchronization Jump
Width Control (DSJW) field in the Channel n Data Bitrate Configuration
Register (DCFG) register is one bit wider than on older variants.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/all/c4e8bc220bf87e6c7e375f7a2ce51e2aa89ea8a7.1674499048.git.geert+renesas@glider.be
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index aa7fcd4..ee7bbd9 100644 (file)
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -186,7 +186,7 @@
 #define RCANFD_CERFL_ERR(x)            ((x) & (0x7fff)) /* above bits 14:0 */
 
 /* RSCFDnCFDCmDCFG */
-#define RCANFD_DCFG_DSJW(x)            (((x) & 0x7) << 24)
+#define RCANFD_DCFG_DSJW(gpriv, x)     (((x) & reg_gen4(gpriv, 0xf, 0x7)) << 24)
 
 #define RCANFD_DCFG_DTSEG2(gpriv, x) \
        (((x) & reg_gen4(gpriv, 0x0f, 0x7)) << reg_gen4(gpriv, 16, 20))
@@ -1343,7 +1343,7 @@ static void rcar_canfd_set_bittiming(struct net_device *dev)
                tseg2 = dbt->phase_seg2 - 1;
 
                cfg = (RCANFD_DCFG_DTSEG1(gpriv, tseg1) | RCANFD_DCFG_DBRP(brp) |
-                      RCANFD_DCFG_DSJW(sjw) | RCANFD_DCFG_DTSEG2(gpriv, tseg2));
+                      RCANFD_DCFG_DSJW(gpriv, sjw) | RCANFD_DCFG_DTSEG2(gpriv, tseg2));
 
                rcar_canfd_write(priv->base, RCANFD_F_DCFG(gpriv, ch), cfg);
                netdev_dbg(priv->ndev, "drate: brp %u, sjw %u, tseg1 %u, tseg2 %u\n",