From nobody Tue Feb 10 02:49:51 2026 Received: from smtp-out3.simply.com (smtp-out3.simply.com [94.231.106.210]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A027532B9BD; Tue, 23 Dec 2025 10:56:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=94.231.106.210 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766487401; cv=none; b=eGzZLBDVrbvXEFWpmdX6pCxUUQPFkwxKm8zxshJZtrmAavadyG1LGj9R89GZhN80TvCmTjUzOP8+M++zuDmntc/ty5qVulR6IuDmGvcQBlfywfDGa11QQAfPeGOPxJzSSMj5TshJVJsBvsAkjOfuH2CX8jXb6SCImYX8syGlajA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766487401; c=relaxed/simple; bh=V4B81ldGHaQr4Fo6sQ46ag8QdAvOe2EzrCi6sXLaTcA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LeneMRWkdM5Je8xmH+FDo85yew9Hq9Kx1P3qEFNh/IK3wFZsbu3aWHO+tHhX1S0btmiEFzw/OTVpaVGwLcybJ0W9bbP5dfwxSaxHMuItqWDfkIe5DSBHS6aaTK9z8vdDFmc/BxW3HpZjeURGRaNDH2L60sAqtMAVwZrOlYwOi0w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gaisler.com; spf=pass smtp.mailfrom=gaisler.com; dkim=fail (0-bit key) header.d=gaisler.com header.i=@gaisler.com header.b=TiwklGZP reason="key not found in DNS"; arc=none smtp.client-ip=94.231.106.210 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gaisler.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gaisler.com Authentication-Results: smtp.subspace.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=gaisler.com header.i=@gaisler.com header.b="TiwklGZP" Received: from localhost (localhost [127.0.0.1]) by smtp.simply.com (Simply.com) with ESMTP id 4dbBlF3GBfz1DR2l; Tue, 23 Dec 2025 11:56:25 +0100 (CET) Received: from d-5xj5g74.got.gaisler.com.com (h-98-128-223-123.NA.cust.bahnhof.se [98.128.223.123]) by smtp.simply.com (Simply.com) with ESMTPA id 4dbBlF0qHCz1DHcd; Tue, 23 Dec 2025 11:56:25 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gaisler.com; s=simplycom2; t=1766487385; bh=YAYzPUEcArEa3JVRdCueQZUu9bqLktofuk5IHtJ8aTY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=TiwklGZPxHszH//2ErVZoOTfU0p6HQBSkdNRNOOYVYMz+XWelVJzvILUDyVkYAYJa dqJHY091m99dBMa8XBgHMdHqxhvn+RGPlAoNjP3eE9a6WBIY5cdgoC2UxOLfezkj8I KpRxNOlRcEM+lfZzNb9TJ13SfnZMXNYv73jLz6qdnHI0tJz4R1THtLrI4venXhYj8U SuVg008cV6u7j7TkmxRVhBgc9a8ZvoiPRWX+1U/O/9u10FAaMcT7huyG7nkZJJ8ORX YK4Dgz+Utb2Cc0LN+Vgn5oWJhRp4bzAlCDN1jXS8SimxUPHoUNg3LvjggUBEY+PRXO drIfwqzCXaVxw== From: Arun Muthusamy To: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, mkl@pengutronix.de, mailhol@kernel.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-can@vger.kernel.org, Daniel Hellstrom , Arun Muthusamy Subject: [PATCH v2 08/10] can: grcan: Add saving and restoring of CAN FD baud-rate registers Date: Tue, 23 Dec 2025 11:56:02 +0100 Message-ID: <20251223105604.12675-9-arun.muthusamy@gaisler.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251223105604.12675-1-arun.muthusamy@gaisler.com> References: <20251223105604.12675-1-arun.muthusamy@gaisler.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" From: Daniel Hellstrom While reset the GRCAN baud-rates are preserved, since GRCANFD has the baud-rate in different registers we need to add saving of those registers too. Signed-off-by: Daniel Hellstrom Signed-off-by: Arun Muthusamy --- drivers/net/can/grcan.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/net/can/grcan.c b/drivers/net/can/grcan.c index cdb9498cf783..dc14b3145e73 100644 --- a/drivers/net/can/grcan.c +++ b/drivers/net/can/grcan.c @@ -520,15 +520,27 @@ static void grcan_reset(struct net_device *dev) struct grcan_priv *priv =3D netdev_priv(dev); struct grcan_registers __iomem *regs =3D priv->regs; u32 config =3D grcan_read_reg(®s->conf); + u32 nbtr, fdbtr; + + if (priv->hwcap->fd) { + nbtr =3D grcan_read_reg(®s->nbtr); + fdbtr =3D grcan_read_reg(®s->fdbtr); + } =20 grcan_set_bits(®s->ctrl, GRCAN_CTRL_RESET); grcan_write_reg(®s->conf, config); + if (priv->hwcap->fd) { + grcan_write_reg(®s->nbtr, nbtr); + grcan_write_reg(®s->fdbtr, fdbtr); + } =20 priv->eskbp =3D grcan_read_reg(®s->txrd); priv->can.state =3D CAN_STATE_STOPPED; =20 /* Turn off hardware filtering - regs->rxcode set to 0 by reset */ grcan_write_reg(®s->rxmask, 0); + + priv->hwcap->set_bittiming(dev); } =20 /* stop device without changing any configurations */ --=20 2.51.0