From patchwork Tue Apr 28 13:40:33 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?RWRkaWUgSHVhbmcgKOm7g+aZuuWCkSk=?= X-Patchwork-Id: 6289521 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 6F42D9F1C2 for ; Tue, 28 Apr 2015 13:44:23 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8098F20221 for ; Tue, 28 Apr 2015 13:44:22 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 95AC920383 for ; Tue, 28 Apr 2015 13:44:18 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Yn5lp-0002fc-8R; Tue, 28 Apr 2015 13:41:53 +0000 Received: from [210.61.82.184] (helo=mailgw02.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Yn5lC-00023j-61; Tue, 28 Apr 2015 13:41:15 +0000 X-Listener-Flag: 11101 Received: from mtkhts07.mediatek.inc [(172.21.101.69)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 567334878; Tue, 28 Apr 2015 21:40:54 +0800 Received: from mtkslt208.mediatek.inc (10.21.15.95) by mtkhts07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.181.6; Tue, 28 Apr 2015 21:40:52 +0800 From: Eddie Huang To: Greg Kroah-Hartman , Matthias Brugger Subject: [PATCH v3 2/3] tty: serial: 8250_mtk: Add earlycon Date: Tue, 28 Apr 2015 21:40:33 +0800 Message-ID: <1430228434-31779-3-git-send-email-eddie.huang@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1430228434-31779-1-git-send-email-eddie.huang@mediatek.com> References: <1430228434-31779-1-git-send-email-eddie.huang@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150428_064114_445163_A57997DC X-CRM114-Status: UNSURE ( 7.42 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 1.3 (+) Cc: Mark Rutland , "Rafael J. Wysocki" , Catalin Marinas , Will Deacon , Jiri Slaby , Kevin Cernekee , Howard Chen , linux-serial@vger.kernel.org, devicetree@vger.kernel.org, Pawel Moll , Ian Campbell , Vineet Gupta , Kumar Gala , Rob Herring , linux-mediatek@lists.infradead.org, Eddie Huang , linux-arm-kernel@lists.infradead.org, Alan Cox , Peter Hurley , srv_heupstream@mediatek.com, linux-kernel@vger.kernel.org, Ashwin Chaugule , Sascha Hauer , Wang Long X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add 8250 MTK UART driver to support earlycon device tree. Earlycon take effect by add "earlycon" in kernel boot argument add "linux,sdtout-path" property in device tree file Signed-off-by: Eddie Huang --- drivers/tty/serial/8250/8250_mtk.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index 7a11fac..8b2a666 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c @@ -289,6 +289,19 @@ static struct platform_driver mtk8250_platform_driver = { }; module_platform_driver(mtk8250_platform_driver); +static int __init early_mtk8250_setup(struct earlycon_device *device, + const char *options) +{ + if (!device->port.membase) + return -ENODEV; + + device->port.iotype = UPIO_MEM32; + + return early_serial8250_setup(device, NULL); +} + +OF_EARLYCON_DECLARE(mtk8250, "mediatek,mt6577-uart", early_mtk8250_setup); + MODULE_AUTHOR("Matthias Brugger"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Mediatek 8250 serial port driver");