diff mbox series

[5.10.y-cip,6/7] can: rcar_canfd: Add postdiv to struct rcar_canfd_hw_info

Message ID 20221213172316.1848032-7-biju.das.jz@bp.renesas.com (mailing list archive)
State Accepted, archived
Delegated to: Pavel Machek
Headers show
Series CANFD Improvement | expand

Commit Message

Biju Das Dec. 13, 2022, 5:23 p.m. UTC 
commit a1dcfbdfd1d0f7843f381f7c58cc87a0f8c11f6c upstream.

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@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/all/20221027082158.95895-5-biju.das.jz@bp.renesas.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
[biju: Dropped RCar V3U related changes]
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
 drivers/net/can/rcar/rcar_canfd.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index 6480e8835dc6..fa0b3de0b628 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -496,6 +496,7 @@  struct rcar_canfd_global;
 
 struct rcar_canfd_hw_info {
 	enum rcanfd_chip_id chip_id;
+	u8 postdiv;
 	/* hardware features */
 	unsigned shared_global_irqs:1;	/* Has shared global irqs */
 };
@@ -570,11 +571,13 @@  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,
+	.postdiv = 2,
 	.shared_global_irqs = 1,
 };
 
 static const struct rcar_canfd_hw_info rzg2l_hw_info = {
 	.chip_id = RENESAS_RZG2L,
+	.postdiv = 1,
 };
 
 /* Helper functions */
@@ -1861,9 +1864,9 @@  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_RCAR_GEN3)
+	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)) {