From nobody Tue Feb 10 04:14:22 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 E5DB535E529; Thu, 22 Jan 2026 12:10:54 +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=1769083857; cv=none; b=GLbnkn307GQNOVsjXb/VENZEc/L4L60CayBVPdA0Uk6dFy7WMs9CKErGcFeZu81XVxdGRAnGgTiUVHfM4sOsIwcM8IGpij8XQ6x2QsCm5/8IEBWCzsLz26m5I51EBwOVGTrGOzF98nYFCImle0FLAQUHshexxXdEMUAVaGOWp+M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769083857; c=relaxed/simple; bh=5nuYmtDIo1xkP7UImyOsAOk/6W2j04fEWx3lpFIWgw8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CZwJwuznsswl0h3TViBC8wxMGCDI5E/n0DTcIjvROS5a3C59Fy42Y2Txa9riRM3bG+aySqY9Qd+w3oB6S5nR/duvL9H6Cpx6m2rKu9pfSKV35hVvh4JoQjhcGhjmr34rXCS6YMWtu1Zsus5/SXUryT3zfAUFQgyZTENMtbWwTmc= 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=PIy+4mnh 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="PIy+4mnh" Received: from localhost (localhost [127.0.0.1]) by smtp.simply.com (Simply.com) with ESMTP id 4dxfzB58L3z1FgdF; Thu, 22 Jan 2026 13:10:46 +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 4dxfzB2FWMz1Fgcl; Thu, 22 Jan 2026 13:10:46 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gaisler.com; s=simplycom2; t=1769083846; bh=npkggg7tOGIOrWu8aBerGnxSfTPWt4Z7jdrnizYzqoc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PIy+4mnhfDoUbHLJGdEV9KEyIdPc2qAfmoAjUK/W/6uFL4rrSRarHqHG35VUQbu+e gEiucPT3/M18SDzJ7WDGz2MOBloqgmPbJ+9PK6/pE5RFnouPCUW7VyZK6HQlAX/723 /ut09Gg6zIK3X4pxCrFhCXtuKqKJL8JHxOF89DDohSG7CH6bthniZuZ/7bzSwNNsG5 hPafuOLSyqZQz2e6czwMz79PennYkI0XDTHYuUKhhg4cqUjj3usbV75uaHffZsFv6j RAW40rAagg1zBNCjojRUU4/9mw8fzzPnOTdoaU7tLdhx3ygyu1x79mDxsAcs3GZiAI tlmvt9+oxKfWA== 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 04/15] can: grcan: Add clock handling Date: Thu, 22 Jan 2026 13:10:27 +0100 Message-ID: <20260122121038.7910-5-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 Add clock handling and add error messages for missing 'freq' DT property. Signed-off-by: Daniel Hellstrom Signed-off-by: Arun Muthusamy --- drivers/net/can/grcan.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/drivers/net/can/grcan.c b/drivers/net/can/grcan.c index 3b1b09943436..538a9b4f82ab 100644 --- a/drivers/net/can/grcan.c +++ b/drivers/net/can/grcan.c @@ -34,7 +34,7 @@ #include #include #include - +#include #include =20 #define DRV_NAME "grcan" @@ -1644,6 +1644,7 @@ static int grcan_probe(struct platform_device *ofdev) { struct device_node *np =3D ofdev->dev.of_node; struct device_node *sysid_parent; + struct clk *clk; u32 sysid, ambafreq; int irq, err; void __iomem *base; @@ -1663,8 +1664,20 @@ static int grcan_probe(struct platform_device *ofdev) =20 err =3D of_property_read_u32(np, "freq", &ambafreq); if (err) { - dev_err(&ofdev->dev, "unable to fetch \"freq\" property\n"); - goto exit_error; + clk =3D devm_clk_get(&ofdev->dev, NULL); + if (IS_ERR(clk)) { + dev_err_probe(&ofdev->dev, PTR_ERR(clk), + "Failed both to get \"freq\" property and clock for fallback\n"); + err =3D PTR_ERR(clk); + goto exit_error; + } + if (clk) { + ambafreq =3D clk_get_rate(clk); + if (!ambafreq) { + dev_err(&ofdev->dev, "Invalid or Uninitialized clock\n"); + return -EINVAL; + } + } } =20 base =3D devm_platform_ioremap_resource(ofdev, 0); --=20 2.51.0