From: Biju Das Date: Thu, 27 Oct 2022 08:21:56 +0000 (+0100) Subject: can: rcar_canfd: Add postdiv to struct rcar_canfd_hw_info X-Git-Tag: v6.6.7~3913^2~24^2~14^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a1dcfbdfd1d0f7843f381f7c58cc87a0f8c11f6c;p=platform%2Fkernel%2Flinux-starfive.git can: rcar_canfd: Add postdiv to struct rcar_canfd_hw_info 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 Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/all/20221027082158.95895-5-biju.das.jz@bp.renesas.com Signed-off-by: Marc Kleine-Budde --- diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c index 8a0d2c6..16294a7 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)) {