can: rcar_canfd: Add ch_interface_mode variable to struct rcar_canfd_hw_info

R-Car Gen4 has channel specific interface mode bit for setting CAN-FD or
Classical CAN mode whereas on R-Car Gen3 it is global. Add a
ch_interface_mode variable to struct rcar_canfd_hw_info to handle this
difference.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://patch.msgid.link/20250417054320.14100-14-biju.das.jz@bp.renesas.com
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 d8380f38cddeaa621c7fe0ab0c84080154dbf475..25c00abee9ccf1c2930562626cfda4cc7f46c3e4 100644 (file)
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -516,6 +516,7 @@ struct rcar_canfd_hw_info {
        /* hardware features */
        unsigned shared_global_irqs:1;  /* Has shared global irqs */
        unsigned multi_channel_irqs:1;  /* Has multiple channel irqs */
+       unsigned ch_interface_mode:1;   /* Has channel interface mode */
 };
 
 /* Channel priv data */
@@ -619,6 +620,7 @@ static const struct rcar_canfd_hw_info rcar_gen3_hw_info = {
        .max_channels = 2,
        .postdiv = 2,
        .shared_global_irqs = 1,
+       .ch_interface_mode = 0,
 };
 
 static const struct rcar_canfd_hw_info rcar_gen4_hw_info = {
@@ -630,6 +632,7 @@ static const struct rcar_canfd_hw_info rcar_gen4_hw_info = {
        .max_channels = 8,
        .postdiv = 2,
        .shared_global_irqs = 1,
+       .ch_interface_mode = 1,
 };
 
 static const struct rcar_canfd_hw_info rzg2l_hw_info = {
@@ -641,6 +644,7 @@ static const struct rcar_canfd_hw_info rzg2l_hw_info = {
        .max_channels = 2,
        .postdiv = 1,
        .multi_channel_irqs = 1,
+       .ch_interface_mode = 0,
 };
 
 /* Helper functions */
@@ -733,7 +737,7 @@ static void rcar_canfd_setrnc(struct rcar_canfd_global *gpriv, unsigned int ch,
 
 static void rcar_canfd_set_mode(struct rcar_canfd_global *gpriv)
 {
-       if (is_gen4(gpriv)) {
+       if (gpriv->info->ch_interface_mode) {
                u32 ch, val = gpriv->fdmode ? RCANFD_GEN4_FDCFG_FDOE
                                            : RCANFD_GEN4_FDCFG_CLOE;