From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 4AA6616C861; Fri, 9 Aug 2024 05:57:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723183036; cv=none; b=PK4qHQMxOnajzZOSnjIDspO6SAb9kRZDpFfd+qZ5Il22Y+MPJ7Jt+3dXPSiuQ9u4g0iqojg9YSsE2Uk1iuIIiC1/n5Av0Ohrge1jc1mDEgyJxmpS58fmuPeEPJuaF1sbPnWynFlumyAEbQ5iNlKA7prujLHohOZcdw173QbqQvo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723183036; c=relaxed/simple; bh=/mWCZ3jkN279IwSE5nwXFBrY4GUZ536BaRUa5kC1WKM=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=piTufU1HSw/lK3otWAItmGoO0/Gdg+Z4cNL+BP8aYLM7BDKeoezXKef3dY/ce7lEjIHv3MIQVM99Yt6RnlrDowNi7nuValcR8UbmRcHp4Di7V8tU3iRepG/mQik41N3OCyl9EOJVRLEtIsV5wlIAycC3APRZEYrQ3IpOYOJmGkM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fCnPQp6e; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="fCnPQp6e" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AAE71C32782; Fri, 9 Aug 2024 05:57:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723183035; bh=/mWCZ3jkN279IwSE5nwXFBrY4GUZ536BaRUa5kC1WKM=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=fCnPQp6ebMrRppXFcdm5yHd4Kl0hIbdF17oN1EP5bRGiel62BtwsuKjQXjU50011y h0SGjvB33A7WNQtIltrGlcUlrT7dRYFTp5ofco6SmvVlKNhpLa0aCyaFRMxj9Defnn rmxZBk5cnWWTwtW5Va+iuYIj1CX4bJsq9FsxQcrQmVjkXqGLwQzCw/4HvLqVaTJQSS wdnEk0oxO/EJAjSG79EPZvZ/JsLiHqD7lKVw5qu76lKjVqEJ8QFNMkwItHpMWeG4ej CbDpQY3af3gBjcn6C4iVqlJYwUsbX48VE47YtVcNrksjxzh7Z+FdIS7KN08H2u5zAF 417cDvZrIqMew== Message-ID: Date: Fri, 9 Aug 2024 07:57:05 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/3] tty: serial: 8250: Add loongson uart driver support To: =?UTF-8?B?6YOR6LGq5aiB?= , gregkh@linuxfoundation.org, jirislaby@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, chenhuacai@kernel.org, kernel@xen0n.name, p.zabel@pengutronix.de Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, loongarch@lists.linux.dev References: <20240804063834.70022-1-zhenghaowei@loongson.cn> <20240804063834.70022-2-zhenghaowei@loongson.cn> <84ff11bd-1d11-4d66-a56b-84bf915af346@kernel.org> <77b249fd-3cf7-4cb4-a2b4-64c0c2ba96fa@loongson.cn> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 07/08/2024 10:24, 郑豪威 wrote: >>> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); >>> + if (!res) >>> + return -ENODEV; >>> + >>> + port->membase = devm_ioremap(&pdev->dev, res->start, resource_size(res)); >>> + if (!port->membase) >>> + return -ENOMEM; >>> + >> Use wrapper combining both calls. > > I got it, did you mean like this? > > +    res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > +    if (!res) > +        return -ENODEV; > + > +    port->mapbase = res->start; > +    port->mapsize = resource_size(res); > + > +    port->membase = devm_ioremap(&pdev->dev, port->mapbase, port->mapsize); > +    if (!port->membase) >  +       return -ENOMEM; I still see two calls, so how are they combined? Just open any other file and see how it is done there. Best regards, Krzysztof