[PATCH net-next 07/39] can: rcar_canfd: Add postdiv to struct rcar_canfd_hw_info

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From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>

R-Car has a clock divider for CAN FD clock within the IP, whereas
it is not available on RZ/G2L.

Add postdiv variable to struct rcar_canfd_hw_info to take care of this
difference.

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Link: https://lore.kernel.org/all/20221027082158.95895-5-biju.das.jz@xxxxxxxxxxxxxx
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
 drivers/net/can/rcar/rcar_canfd.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index 8a0d2c64dd3e..16294a78320e 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -525,6 +525,7 @@ struct rcar_canfd_global;
 struct rcar_canfd_hw_info {
 	enum rcanfd_chip_id chip_id;
 	u8 max_channels;
+	u8 postdiv;
 	/* hardware features */
 	unsigned shared_global_irqs:1;	/* Has shared global irqs */
 };
@@ -599,17 +600,20 @@ static const struct can_bittiming_const rcar_canfd_bittiming_const = {
 static const struct rcar_canfd_hw_info rcar_gen3_hw_info = {
 	.chip_id = RENESAS_RCAR_GEN3,
 	.max_channels = 2,
+	.postdiv = 2,
 	.shared_global_irqs = 1,
 };
 
 static const struct rcar_canfd_hw_info rzg2l_hw_info = {
 	.chip_id = RENESAS_RZG2L,
+	.postdiv = 1,
 	.max_channels = 2,
 };
 
 static const struct rcar_canfd_hw_info r8a779a0_hw_info = {
 	.chip_id = RENESAS_R8A779A0,
 	.max_channels = 8,
+	.postdiv = 2,
 	.shared_global_irqs = 1,
 };
 
@@ -1938,9 +1942,9 @@ static int rcar_canfd_probe(struct platform_device *pdev)
 	}
 	fcan_freq = clk_get_rate(gpriv->can_clk);
 
-	if (gpriv->fcan == RCANFD_CANFDCLK && info->chip_id != RENESAS_RZG2L)
+	if (gpriv->fcan == RCANFD_CANFDCLK)
 		/* CANFD clock is further divided by (1/2) within the IP */
-		fcan_freq /= 2;
+		fcan_freq /= info->postdiv;
 
 	addr = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(addr)) {
-- 
2.35.1





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