From patchwork Thu Oct 27 08:21:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 13021769 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 737A5FA3749 for ; Thu, 27 Oct 2022 08:22:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233946AbiJ0IWq (ORCPT ); Thu, 27 Oct 2022 04:22:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43440 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234991AbiJ0IWe (ORCPT ); Thu, 27 Oct 2022 04:22:34 -0400 Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id C0AAB78586; Thu, 27 Oct 2022 01:22:31 -0700 (PDT) X-IronPort-AV: E=Sophos;i="5.95,217,1661785200"; d="scan'208";a="140573928" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 27 Oct 2022 17:22:31 +0900 Received: from localhost.localdomain (unknown [10.226.93.45]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id D1E5F4048F22; Thu, 27 Oct 2022 17:22:25 +0900 (JST) From: Biju Das To: Wolfgang Grandegger , Marc Kleine-Budde , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: Biju Das , Vincent Mailhol , =?utf-8?q?Stefan_M=C3=A4tje?= , Ulrich Hecht , Lad Prabhakar , Christophe JAILLET , linux-can@vger.kernel.org, netdev@vger.kernel.org, Geert Uytterhoeven , Chris Paterson , Biju Das , linux-renesas-soc@vger.kernel.org Subject: [PATCH v3 4/6] can: rcar_canfd: Add postdiv to struct rcar_canfd_hw_info Date: Thu, 27 Oct 2022 09:21:56 +0100 Message-Id: <20221027082158.95895-5-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221027082158.95895-1-biju.das.jz@bp.renesas.com> References: <20221027082158.95895-1-biju.das.jz@bp.renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org 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 --- v2->v3: * Replaced data type of postdiv from unsigned int->u8 to save memory. 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 c8d44dc36515..bc5df7a39f91 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; u8 max_channels; + u8 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)) {