[PATCH net-next 15/37] can: rcar_canfd: Add support for Renesas RZ/G3S

[Marc Kleine-Budde <mkl@pengutronix.de>]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

Add support for Renesas RZ/G3S

The Renesas RZ/G3S CAN-FD controller is largely compatible with the
variant found on the Renesas RZ/G3E. The main differences are:
- the RZ/G3S provides 16 AFL pages
- the RZ/G3S supports only two channels
- the RZ/G3S supports only CAN-FD operation and does not implement the
  bits used to select between classical CAN-only and CAN FD-only modes.
- the RZ/G3S includes an internal divider that allows the peripheral
  clock to be used as the CAN FD clock source.

Add support for the Renesas RZ/G3S.

Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://patch.msgid.link/20260902141544.565763-6-claudiu.beznea+renesas@tuxon.dev
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/rcar/rcar_canfd.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index ac5d5959d8e4..74c3c3f20991 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -661,6 +661,26 @@ static const struct rcar_canfd_hw_info rzg2l_hw_info = {
 	.fixed_canfd = 0,
 };
 
+static const struct rcar_canfd_hw_info r9a08g045_hw_info = {
+	.nom_bittiming = &rcar_canfd_gen4_nom_bittiming_const,
+	.data_bittiming = &rcar_canfd_gen4_data_bittiming_const,
+	.tdc_const = &rcar_canfd_gen4_tdc_const,
+	.regs = &rcar_gen4_regs,
+	.sh = &rcar_gen4_shift_data,
+	.rnc_field_width = 16,
+	.max_aflpn = 15,
+	.max_cftml = 31,
+	.max_channels = 2,
+	.postdiv = 2,
+	.shared_global_irqs = 0,
+	.multi_channel_irqs = 1,
+	.ch_interface_mode = 1,
+	.shared_can_regs = 1,
+	.external_clk = 1,
+	.fcan_pclk = 1,
+	.fixed_canfd = 1,
+};
+
 static const struct rcar_canfd_hw_info r9a09g047_hw_info = {
 	.nom_bittiming = &rcar_canfd_gen4_nom_bittiming_const,
 	.data_bittiming = &rcar_canfd_gen4_data_bittiming_const,
@@ -2383,6 +2403,7 @@ static DEFINE_SIMPLE_DEV_PM_OPS(rcar_canfd_pm_ops, rcar_canfd_suspend,
 
 static const __maybe_unused struct of_device_id rcar_canfd_of_table[] = {
 	{ .compatible = "renesas,r8a779a0-canfd", .data = &rcar_gen4_hw_info },
+	{ .compatible = "renesas,r9a08g045-canfd", .data = &r9a08g045_hw_info },
 	{ .compatible = "renesas,r9a09g047-canfd", .data = &r9a09g047_hw_info },
 	{ .compatible = "renesas,r9a09g077-canfd", .data = &r9a09g077_hw_info },
 	{ .compatible = "renesas,rcar-gen3-canfd", .data = &rcar_gen3_hw_info },
-- 
2.53.0