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, 57 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-omap2/clock2xxx.c b/kernel/arch/arm/mach-omap2/clock2xxx.c
new file mode 100644
index 000000000..b870f6a9e
--- /dev/null
+++ b/kernel/arch/arm/mach-omap2/clock2xxx.c
@@ -0,0 +1,57 @@
+/*
+ * clock2xxx.c - OMAP2xxx-specific clock integration code
+ *
+ * Copyright (C) 2005-2008 Texas Instruments, Inc.
+ * Copyright (C) 2004-2010 Nokia Corporation
+ *
+ * Contacts:
+ * Richard Woodruff <r-woodruff2@ti.com>
+ * Paul Walmsley
+ *
+ * Based on earlier work by Tuukka Tikkanen, Tony Lindgren,
+ * Gordon McNutt and RidgeRun, Inc.
+ *
+ * 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.
+ */
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include "soc.h"
+#include "clock.h"
+#include "clock2xxx.h"
+#include "cm.h"
+#include "cm-regbits-24xx.h"
+
+struct clk_hw *dclk_hw;
+/*
+ * Omap24xx specific clock functions
+ */
+
+/*
+ * Switch the MPU rate if specified on cmdline.  We cannot do this
+ * early until cmdline is parsed.  XXX This should be removed from the
+ * clock code and handled by the OPP layer code in the near future.
+ */
+static int __init omap2xxx_clk_arch_init(void)
+{
+	int ret;
+
+	if (!cpu_is_omap24xx())
+		return 0;
+
+	ret = omap2_clk_switch_mpurate_at_boot("virt_prcm_set");
+	if (!ret)
+		omap2_clk_print_new_rates("sys_ck", "dpll_ck", "mpu_ck");
+
+	return ret;
+}
+
+omap_arch_initcall(omap2xxx_clk_arch_init);
+
+