can: rcar_canfd: Add external_clk variable to struct rcar_canfd_hw_info

All existing SoCs support an external clock, but RZ/G3E has only internal
clocks. Add external_clk 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/20250417054320.14100-18-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 67f7b5f6376c4a285a55fa32f7897bcc9ee15ead..0bf0e88dfe257714607071c27a4d8e99eda546bf 100644 (file)
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -541,6 +541,7 @@ struct rcar_canfd_hw_info {
        unsigned multi_channel_irqs:1;  /* Has multiple channel irqs */
        unsigned ch_interface_mode:1;   /* Has channel interface mode */
        unsigned shared_can_regs:1;     /* Has shared classical can registers */
+       unsigned external_clk:1;        /* Has external clock */
 };
 
 /* Channel priv data */
@@ -690,6 +691,7 @@ static const struct rcar_canfd_hw_info rcar_gen3_hw_info = {
        .shared_global_irqs = 1,
        .ch_interface_mode = 0,
        .shared_can_regs = 0,
+       .external_clk = 1,
 };
 
 static const struct rcar_canfd_hw_info rcar_gen4_hw_info = {
@@ -705,6 +707,7 @@ static const struct rcar_canfd_hw_info rcar_gen4_hw_info = {
        .shared_global_irqs = 1,
        .ch_interface_mode = 1,
        .shared_can_regs = 1,
+       .external_clk = 1,
 };
 
 static const struct rcar_canfd_hw_info rzg2l_hw_info = {
@@ -720,6 +723,7 @@ static const struct rcar_canfd_hw_info rzg2l_hw_info = {
        .multi_channel_irqs = 1,
        .ch_interface_mode = 0,
        .shared_can_regs = 0,
+       .external_clk = 1,
 };
 
 /* Helper functions */
@@ -2048,7 +2052,7 @@ static int rcar_canfd_probe(struct platform_device *pdev)
                fcan_freq = clk_get_rate(gpriv->can_clk) / info->postdiv;
        } else {
                fcan_freq = clk_get_rate(gpriv->can_clk);
-               gpriv->extclk = true;
+               gpriv->extclk = gpriv->info->external_clk;
        }
 
        addr = devm_platform_ioremap_resource(pdev, 0);