[PATCH v2 2/4] tty: serial: 8250_mtk: Add earlycon
From: eddie.huang@mediatek.com (Eddie Huang)
Date: 2015-01-12 13:08:22
Also in:
linux-devicetree, linux-serial
Subsystem:
8250/16?50 (and clone uarts) serial driver, the rest, tty layer and serial drivers · Maintainers:
Greg Kroah-Hartman, Linus Torvalds, Jiri Slaby
Add 8250 MTK UART driver to support earlycon device tree. Signed-off-by: Eddie Huang <eddie.huang@mediatek.com> --- 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 <linux/pm_runtime.h> #include <linux/serial_8250.h> #include <linux/serial_reg.h> +#include <linux/console.h> #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