From nobody Wed Oct 8 02:24:36 2025 Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 2738D2F2C70; Thu, 3 Jul 2025 18:34:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.160.252.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751567670; cv=none; b=jkfmVm4kxmrJBtfRqa2bl38W9qnbL+0Uqqs1BOPwEsLb2J8ehj7xlLKA/5B3fheBe0HiZ9akNXmjkwwWbmF4Sk4LoB2sxg10cfNcGQRXL35YelnACSYpcGBqYEEQM+7SjpGbuIvgWF9p54xvTMWa0gUc3AqV7Hdhq5fhwJiZqVE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751567670; c=relaxed/simple; bh=U5+QNp9Zh4q1QTX45unamveKVhZ71+n+5d57KeDbi8s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eAn2QfYUwpA6MFUQgAQDkJebczYlv26uucshn1ACo6E3RK8ruvel3Keu7CEAmZXIivbtEIZOlqRERkcyXMPOKi3YPitWcH1ps2bN3G9T2XpdKhOW+7lQiLYgzRQgtECOEAN5igdNJfCKxjIMTkF3/FQhIhQ3WvA4a13myjY1YiQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=bp.renesas.com; spf=pass smtp.mailfrom=bp.renesas.com; arc=none smtp.client-ip=210.160.252.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=bp.renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bp.renesas.com X-CSE-ConnectionGUID: Jd3e6QMBT8+4hP7rB0xCDg== X-CSE-MsgGUID: BJnG3SYuQxCrY0GWu7Vf0A== Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 04 Jul 2025 03:34:20 +0900 Received: from localhost.localdomain (unknown [10.226.92.64]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id A4D43401D165; Fri, 4 Jul 2025 03:34:17 +0900 (JST) From: Biju Das To: Marc Kleine-Budde , Vincent Mailhol , Geert Uytterhoeven , Magnus Damm Cc: Biju Das , Fabrizio Castro , linux-can@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar Mahadev Lad , Biju Das Subject: [PATCH 1/4] can: rcar_canfd: Add shared_bittiming variable to struct rcar_canfd_hw_info Date: Thu, 3 Jul 2025 19:33:59 +0100 Message-ID: <20250703183411.332828-2-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250703183411.332828-1-biju.das.jz@bp.renesas.com> References: <20250703183411.332828-1-biju.das.jz@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The calculation formula for nominal bit rate of classical CAN is same as that of nominal bit rate of CANFD on the RZ/G3E SoC compared to other SoCs. Add shared_bittiming variable to struct rcar_canfd_hw_info to handle this difference. Signed-off-by: Biju Das Reviewed-by: Fabrizio Castro --- drivers/net/can/rcar/rcar_canfd.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_= canfd.c index 417d9196f41e..48eea9045691 100644 --- a/drivers/net/can/rcar/rcar_canfd.c +++ b/drivers/net/can/rcar/rcar_canfd.c @@ -554,6 +554,7 @@ struct rcar_canfd_hw_info { unsigned ch_interface_mode:1; /* Has channel interface mode */ unsigned shared_can_regs:1; /* Has shared classical can registers */ unsigned external_clk:1; /* Has external clock */ + unsigned shared_bittiming:1; /* Has shared nominal bittiming constants */ }; =20 /* Channel priv data */ @@ -725,6 +726,7 @@ static const struct rcar_canfd_hw_info rcar_gen3_hw_inf= o =3D { .ch_interface_mode =3D 0, .shared_can_regs =3D 0, .external_clk =3D 1, + .shared_bittiming =3D 0, }; =20 static const struct rcar_canfd_hw_info rcar_gen4_hw_info =3D { @@ -742,6 +744,7 @@ static const struct rcar_canfd_hw_info rcar_gen4_hw_inf= o =3D { .ch_interface_mode =3D 1, .shared_can_regs =3D 1, .external_clk =3D 1, + .shared_bittiming =3D 0, }; =20 static const struct rcar_canfd_hw_info rzg2l_hw_info =3D { @@ -759,6 +762,7 @@ static const struct rcar_canfd_hw_info rzg2l_hw_info = =3D { .ch_interface_mode =3D 0, .shared_can_regs =3D 0, .external_clk =3D 1, + .shared_bittiming =3D 0, }; =20 static const struct rcar_canfd_hw_info r9a09g047_hw_info =3D { @@ -776,6 +780,7 @@ static const struct rcar_canfd_hw_info r9a09g047_hw_inf= o =3D { .ch_interface_mode =3D 1, .shared_can_regs =3D 1, .external_clk =3D 0, + .shared_bittiming =3D 1, }; =20 /* Helper functions */ @@ -2005,7 +2010,10 @@ static int rcar_canfd_channel_probe(struct rcar_canf= d_global *gpriv, u32 ch, priv->can.fd.do_get_auto_tdcv =3D rcar_canfd_get_auto_tdcv; } else { /* Controller starts in Classical CAN only mode */ - priv->can.bittiming_const =3D &rcar_canfd_bittiming_const; + if (gpriv->info->shared_bittiming) + priv->can.bittiming_const =3D gpriv->info->nom_bittiming; + else + priv->can.bittiming_const =3D &rcar_canfd_bittiming_const; priv->can.ctrlmode_supported =3D CAN_CTRLMODE_BERR_REPORTING; } =20 --=20 2.43.0