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, 84 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-ixp4xx/gtwx5715-pci.c b/kernel/arch/arm/mach-ixp4xx/gtwx5715-pci.c
new file mode 100644
index 000000000..551d114c9
--- /dev/null
+++ b/kernel/arch/arm/mach-ixp4xx/gtwx5715-pci.c
@@ -0,0 +1,84 @@
+/*
+ * arch/arm/mach-ixp4xx/gtwx5715-pci.c
+ *
+ * Gemtek GTWX5715 (Linksys WRV54G) board setup
+ *
+ * Copyright (C) 2004 George T. Joseph
+ * Derived from Coyote
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <asm/mach-types.h>
+#include <mach/hardware.h>
+#include <asm/mach/pci.h>
+
+#define SLOT0_DEVID	0
+#define SLOT1_DEVID	1
+#define INTA		10 /* slot 1 has INTA and INTB crossed */
+#define INTB		11
+
+/*
+ * Slot 0 isn't actually populated with a card connector but
+ * we initialize it anyway in case a future version has the
+ * slot populated or someone with good soldering skills has
+ * some free time.
+ */
+void __init gtwx5715_pci_preinit(void)
+{
+	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
+	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
+	ixp4xx_pci_preinit();
+}
+
+
+static int __init gtwx5715_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+	int rc = -1;
+
+	if ((slot == SLOT0_DEVID && pin == 1) ||
+	    (slot == SLOT1_DEVID && pin == 2))
+		rc = IXP4XX_GPIO_IRQ(INTA);
+	else if ((slot == SLOT0_DEVID && pin == 2) ||
+		 (slot == SLOT1_DEVID && pin == 1))
+		rc = IXP4XX_GPIO_IRQ(INTB);
+
+	printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n",
+	       __func__, slot, pin, rc);
+	return rc;
+}
+
+struct hw_pci gtwx5715_pci __initdata = {
+	.nr_controllers = 1,
+	.ops		= &ixp4xx_ops,
+	.preinit =        gtwx5715_pci_preinit,
+	.setup =          ixp4xx_setup,
+	.map_irq =        gtwx5715_map_irq,
+};
+
+int __init gtwx5715_pci_init(void)
+{
+	if (machine_is_gtwx5715())
+		pci_common_init(&gtwx5715_pci);
+
+	return 0;
+}
+
+subsys_initcall(gtwx5715_pci_init);