Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 141 insertions, 0 deletions

diff --git a/kernel/drivers/tty/serial/8250/8250_acorn.c b/kernel/drivers/tty/serial/8250/8250_acorn.c
new file mode 100644
index 000000000..549aa07c0
--- /dev/null
+++ b/kernel/drivers/tty/serial/8250/8250_acorn.c
@@ -0,0 +1,141 @@
+/*
+ *  linux/drivers/serial/acorn.c
+ *
+ *  Copyright (C) 1996-2003 Russell King.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/tty.h>
+#include <linux/serial_core.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/ecard.h>
+#include <asm/string.h>
+
+#include "8250.h"
+
+#define MAX_PORTS	3
+
+struct serial_card_type {
+	unsigned int	num_ports;
+	unsigned int	uartclk;
+	unsigned int	type;
+	unsigned int	offset[MAX_PORTS];
+};
+
+struct serial_card_info {
+	unsigned int	num_ports;
+	int		ports[MAX_PORTS];
+	void __iomem *vaddr;
+};
+
+static int
+serial_card_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+	struct serial_card_info *info;
+	struct serial_card_type *type = id->data;
+	struct uart_8250_port uart;
+	unsigned long bus_addr;
+	unsigned int i;
+
+	info = kzalloc(sizeof(struct serial_card_info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->num_ports = type->num_ports;
+
+	bus_addr = ecard_resource_start(ec, type->type);
+	info->vaddr = ecardm_iomap(ec, type->type, 0, 0);
+	if (!info->vaddr) {
+		kfree(info);
+		return -ENOMEM;
+	}
+
+	ecard_set_drvdata(ec, info);
+
+	memset(&uart, 0, sizeof(struct uart_8250_port));
+	uart.port.irq	= ec->irq;
+	uart.port.flags	= UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
+	uart.port.uartclk	= type->uartclk;
+	uart.port.iotype	= UPIO_MEM;
+	uart.port.regshift	= 2;
+	uart.port.dev	= &ec->dev;
+
+	for (i = 0; i < info->num_ports; i ++) {
+		uart.port.membase = info->vaddr + type->offset[i];
+		uart.port.mapbase = bus_addr + type->offset[i];
+
+		info->ports[i] = serial8250_register_8250_port(&uart);
+	}
+
+	return 0;
+}
+
+static void serial_card_remove(struct expansion_card *ec)
+{
+	struct serial_card_info *info = ecard_get_drvdata(ec);
+	int i;
+
+	ecard_set_drvdata(ec, NULL);
+
+	for (i = 0; i < info->num_ports; i++)
+		if (info->ports[i] > 0)
+			serial8250_unregister_port(info->ports[i]);
+
+	kfree(info);
+}
+
+static struct serial_card_type atomwide_type = {
+	.num_ports	= 3,
+	.uartclk	= 7372800,
+	.type		= ECARD_RES_IOCSLOW,
+	.offset		= { 0x2800, 0x2400, 0x2000 },
+};
+
+static struct serial_card_type serport_type = {
+	.num_ports	= 2,
+	.uartclk	= 3686400,
+	.type		= ECARD_RES_IOCSLOW,
+	.offset		= { 0x2000, 0x2020 },
+};
+
+static const struct ecard_id serial_cids[] = {
+	{ MANU_ATOMWIDE,	PROD_ATOMWIDE_3PSERIAL,	&atomwide_type	},
+	{ MANU_SERPORT,		PROD_SERPORT_DSPORT,	&serport_type	},
+	{ 0xffff, 0xffff }
+};
+
+static struct ecard_driver serial_card_driver = {
+	.probe		= serial_card_probe,
+	.remove		= serial_card_remove,
+	.id_table	= serial_cids,
+	.drv = {
+		.name	= "8250_acorn",
+	},
+};
+
+static int __init serial_card_init(void)
+{
+	return ecard_register_driver(&serial_card_driver);
+}
+
+static void __exit serial_card_exit(void)
+{
+	ecard_remove_driver(&serial_card_driver);
+}
+
+MODULE_AUTHOR("Russell King");
+MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver");
+MODULE_LICENSE("GPL");
+
+module_init(serial_card_init);
+module_exit(serial_card_exit);