From nobody Tue Feb 10 05:09:41 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 F2D4D429801; Thu, 22 Jan 2026 12:10:58 +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=1769083862; cv=none; b=l522pIvRRvjGYXPAiWrPuHuzr8yJfWXNOQtO8+AvTdPScjokLav4qBmVoFQWRIehv2vTtcJKRdWz/Q32ztj4ocCJ12/HikYODt20j0F3u9ZfBxwXc7NhiOWMoWzBByjT6tb8Z7lKozsYC0neG5LrIoLLXX6lOHcyNIV3Fc8xO1Q= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769083862; c=relaxed/simple; bh=D9L9i8M12EsxiljRdseF7D25+qQuEpcvENTCB6hcrCs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lP2ywf6v1kc3l0MNFNoKkf9S+oWtB7gUOB71bKLKKHLwAwur4Lttu7TvGKq5vp9kqqCck/exwJTuc2p4TakSXFMEYVhKyqS/LHuhhzSpTbuwOT1YLSA7VR8vu3jYWnUk6NeLmUMBsD19qmFZwYVq7qziJgk6nNA5clBdksmvUqk= 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=dOg6EIOL 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="dOg6EIOL" Received: from localhost (localhost [127.0.0.1]) by smtp.simply.com (Simply.com) with ESMTP id 4dxfzF1TBfz1FlXs; Thu, 22 Jan 2026 13:10:49 +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 4dxfzD68MFz1FgdH; Thu, 22 Jan 2026 13:10:48 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gaisler.com; s=simplycom2; t=1769083849; bh=Z9BHb1vgH1ymUiLA9YViZTEhdIFyi4WNzllEYLrgUw4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=dOg6EIOL/dPTNklUDqTEcMdaC6cEeeSyciQSGdEbQt4ggTKLKR8xbhzUalJZrHnyD ms3vMbmoMZIJYUKzaI/szijIz5Zm4m0SuvFOGOBQS4NmF4zYk8QSySZ9RlWAlsHHYl GA9fjk2zreBhesnr2Das0TSe6KNBOH4nrNi8CPj2SvCEmInCMwwX78q6N0ivc1aZ4z 6Z563iXQzuOVByvZQ7SKNaRTXHApgV5LtzAnS7z6/YchfUwR1E+rGO3LjoORvK67Wd lXm1+0gDi76c9Wp0q3jIMmx4qxIv0A1hSJ1MSSB0rm8Nc0uO/TYMOH1ma0simYDGsA L93Yes7DC4pDw== 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 v3 10/15] can: grcan: Add saving and restoring of CAN FD baud-rate registers Date: Thu, 22 Jan 2026 13:10:33 +0100 Message-ID: <20260122121038.7910-11-arun.muthusamy@gaisler.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260122121038.7910-1-arun.muthusamy@gaisler.com> References: <20260122121038.7910-1-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 a2a5a5c868ff..0ee6e9bfbe7f 100644 --- a/drivers/net/can/grcan.c +++ b/drivers/net/can/grcan.c @@ -517,15 +517,27 @@ 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