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Date: Wed, 26 Oct 2022 14:17:30 +0100 From: Biju Das <biju.das.jz@...renesas.com> To: Wolfgang Grandegger <wg@...ndegger.com>, Marc Kleine-Budde <mkl@...gutronix.de>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com> Cc: Biju Das <biju.das.jz@...renesas.com>, Vincent Mailhol <mailhol.vincent@...adoo.fr>, Stefan Mätje <stefan.maetje@....eu>, Ulrich Hecht <uli+renesas@...nd.eu>, Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>, Christophe JAILLET <christophe.jaillet@...adoo.fr>, linux-can@...r.kernel.org, netdev@...r.kernel.org, Geert Uytterhoeven <geert+renesas@...der.be>, Chris Paterson <Chris.Paterson2@...esas.com>, Biju Das <biju.das@...renesas.com>, linux-renesas-soc@...r.kernel.org Subject: [PATCH v2 4/6] 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 <biju.das.jz@...renesas.com> --- v1->v2: * Replaced clk_postdiv->postdiv driver data variable. * Simplified the calculation for fcan_freq. --- 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 30ec7a462ee7..cf152a5369f7 100644 --- a/drivers/net/can/rcar/rcar_canfd.c +++ b/drivers/net/can/rcar/rcar_canfd.c @@ -526,6 +526,7 @@ struct rcar_canfd_global; struct rcar_canfd_hw_info { enum rcanfd_chip_id chip_id; unsigned int max_channels; + unsigned int postdiv; /* hardware features */ unsigned shared_global_irqs:1; /* Has shared global irqs */ }; @@ -600,17 +601,20 @@ 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, }; @@ -1943,9 +1947,9 @@ 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)) { -- 2.25.1
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