netdev - [PATCH net-next 13/22] can: rcar_canfd: Add ch_interface_mode variable to struct rcar_canfd_hw

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Message-ID: <20250522084128.501049-14-mkl@pengutronix.de>
Date: Thu, 22 May 2025 10:36:41 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	linux-can@...r.kernel.org,
	kernel@...gutronix.de,
	Biju Das <biju.das.jz@...renesas.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Vincent Mailhol <mailhol.vincent@...adoo.fr>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 13/22] can: rcar_canfd: Add ch_interface_mode variable to struct rcar_canfd_hw_info

From: Biju Das <biju.das.jz@...renesas.com>

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@...der.be>
Reviewed-by: Vincent Mailhol <mailhol.vincent@...adoo.fr>
Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
Link: https://patch.msgid.link/20250417054320.14100-14-biju.das.jz@bp.renesas.com
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/rcar/rcar_canfd.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index d8380f38cdde..25c00abee9cc 100644
--- 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;
 
-- 
2.47.2