From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eddie Huang Subject: [PATCH v2 2/4] tty: serial: 8250_mtk: Add earlycon Date: Mon, 12 Jan 2015 21:08:22 +0800 Message-ID: <1421068104-30463-3-git-send-email-eddie.huang@mediatek.com> References: <1421068104-30463-1-git-send-email-eddie.huang@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1421068104-30463-1-git-send-email-eddie.huang@mediatek.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Rob Herring , Mark Rutland , Greg Kroah-Hartman , Matthias Brugger Cc: devicetree@vger.kernel.org, Vladimir Murzin , srv_heupstream@mediatek.com, Pawel Moll , Ian Campbell , Catalin Marinas , Jonathan Corbet , Will Deacon , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, yh.chen@mediatek.com, Howard Chen , Ashwin Chaugule , linux-serial@vger.kernel.org, Kumar Gala , "Joe.C" , Eddie Huang , Jiri Slaby , linux-arm-kernel@lists.infradead.org, Alan Cox List-Id: devicetree@vger.kernel.org Add 8250 MTK UART driver to support earlycon device tree. Signed-off-by: Eddie Huang --- drivers/tty/serial/8250/8250_mtk.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index 7a11fac..86964df 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c @@ -23,6 +23,7 @@ #include #include #include +#include #include "8250.h" @@ -289,6 +290,20 @@ 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; + device->noinit = 1; + + 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"); -- 1.8.1.1.dirty