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Tue, 27 Feb 2024 01:25:27 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1708957528; x=1740493528; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=IPNtP2dbEC5nwNRrbZdk3a6zN5igpayNS2XgmKDfk4s=; b=eJ3wWEp9iiDTe46yTgAluUg8QFDNxlfdfvMQyqhKRxsAS+5IfZCrVOBW NMz1DsZChB6VzxkwWWP/qUrYeIuaLp+i+VOpbnFqy2aGslNSNNuMdoxdy kQ7rEYRmTDTm6/+JvMFbUZyRvRxE1BcObCD1r4sAAa/knkTWIAZoylp9p bkNd9sNI+AftXSpxLSMrxNi4abbuvsemk5MxwFbT83LTA20lCaGMnwaPC CQeVi5/Kkagv6xi2w0yagaKBdSUAPo+sF1IndaZfVZ+BovLoSAd7zW0IU WoJ+za3WoEJhxuzZhsse9e42bcBRYmAI1M71rmSQUatJhtJSBw9buRTWR A==; X-IronPort-AV: E=McAfee;i="6600,9927,10995"; a="3375098" X-IronPort-AV: E=Sophos;i="6.06,185,1705392000"; d="scan'208";a="3375098" 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 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-BeenThere: linux-aspeed@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux ASPEED SoC development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Scott Branden , Florian Fainelli , Ray Jui , Al Cooper , Jonathan Hunter , Kunihiko Hayashi , Vladimir Zapolskiy , Paul Cercueil , Thierry Reding , Broadcom internal kernel review list , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Andrew Jeffery , Jiri Slaby , Masami Hiramatsu Errors-To: linux-aspeed-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linux-aspeed" 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 */