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can: rcar_canfd: Add postdiv to struct rcar_canfd_hw_info

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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>
This commit is contained in:
Biju Das 2022-10-27 09:21:56 +01:00 committed by Marc Kleine-Budde
parent 841645cfc7
commit a1dcfbdfd1
1 changed files with 6 additions and 2 deletions
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8
drivers/net/can/rcar/rcar_canfd.c
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@ -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)) {