From patchwork Mon Feb 26 14:19:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 13572264 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 122D7C54E41 for ; Mon, 26 Feb 2024 14:25:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=mqZ73egeMC5tNYvdAE69IphNLbphTu9lalq3l8kdBYs=; b=iiqBc2pAxlcxFI 6knZ5XFZvRAUqcK8/r+mW6C3v2i2W6h6OzI6u7tJMTOCBJznBFPIa6UQcWHJQY5Fe8NJEOvWOYyYz A9kguT24OP3QZXARS3Y4xh21ARQGQBPOLKxpimPFA+lUW7QqX08dITO2qoIqB0j/Jded3pYV2RWMU DH6XPEGxkE6UIZex7ZVe31Nc2IU1/4lezq0YiylcTyevWINXEr7O2tJsM42vY/5xKVIEsxXVzB/qv Bipkk4FNmDGGvdaOntxPzYyNKizbrGYH43bLN4bH3Pjst/fq9bt7jUFJMx3RT3mfSmd+GxflFgGwM JYiWXRShMYUsrsbRSuow==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rebvO-000000016WQ-0143; Mon, 26 Feb 2024 14:25:46 +0000 Received: from mgamail.intel.com ([198.175.65.16]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rebv4-000000016MD-47L3; Mon, 26 Feb 2024 14:25:28 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1708957527; x=1740493527; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=IPNtP2dbEC5nwNRrbZdk3a6zN5igpayNS2XgmKDfk4s=; b=arD/tviIRB4TGhRpSJE37TCr5fzbISB4zt6QnbhqisFEK0c5YYjG++8L 8txACz9DgI5ZvAF3im7WEkWM8doVY3/qB/9yfbWHlskH6sSg8j7YA133Z C8o2t9VIMvAHgEPOQkkwU2SJTWw6lWteVE/t0uqEY7A4CS7mBUGOcDowo qu0f97VCgiE3qrlhOdelCYmuqq2V7nnyUE0TsrmIHN0PlklZVk+h4OvSJ Gd0gxhe/mIe/RxKNtwdj6OF2fZOHChhapElstdsC4A2WE96Zl1VsdGwaQ ES00A1fT7zElNR8Lf2mTwMLPvdw0GQ/IhZlOLDiNzb4yZhVd8c3tep27H A==; X-IronPort-AV: E=McAfee;i="6600,9927,10995"; a="3375102" X-IronPort-AV: E=Sophos;i="6.06,185,1705392000"; d="scan'208";a="3375102" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Feb 2024 06:25:23 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10995"; a="937030138" X-IronPort-AV: E=Sophos;i="6.06,185,1705392000"; d="scan'208";a="937030138" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 26 Feb 2024 06:25:17 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 18FCD426; Mon, 26 Feb 2024 16:25:16 +0200 (EET) From: Andy Shevchenko To: Greg Kroah-Hartman , Andy Shevchenko , Thomas Gleixner , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-rpi-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-tegra@vger.kernel.org Cc: Jiri Slaby , Joel Stanley , Andrew Jeffery , Florian Fainelli , Broadcom internal kernel review list , Ray Jui , Scott Branden , Al Cooper , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Paul Cercueil , Vladimir Zapolskiy , Thierry Reding , Jonathan Hunter , Kunihiko Hayashi , Masami Hiramatsu Subject: [PATCH v2 02/14] serial: core: Add UPIO_UNKNOWN constant for unknown port type Date: Mon, 26 Feb 2024 16:19:18 +0200 Message-ID: <20240226142514.1485246-3-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.43.0.rc1.1.gbec44491f096 In-Reply-To: <20240226142514.1485246-1-andriy.shevchenko@linux.intel.com> References: <20240226142514.1485246-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240226_062527_093558_E62EB9B7 X-CRM114-Status: GOOD ( 13.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In some APIs we would like to assign the special value to iotype and compare against it in another places. Introduce UPIO_UNKNOWN for this purpose. Note, we can't use 0, because it's a valid value for IO port access. Signed-off-by: Andy Shevchenko --- include/linux/serial_core.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 2d2ec99eca93..c2cf9484014c 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -470,6 +470,7 @@ struct uart_port { unsigned char iotype; /* io access style */ +#define UPIO_UNKNOWN ((unsigned char)~0U) /* UCHAR_MAX */ #define UPIO_PORT (SERIAL_IO_PORT) /* 8b I/O port access */ #define UPIO_HUB6 (SERIAL_IO_HUB6) /* Hub6 ISA card */ #define UPIO_MEM (SERIAL_IO_MEM) /* driver-specific */