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, 88 insertions, 0 deletions

diff --git a/kernel/arch/avr32/mach-at32ap/hmatrix.c b/kernel/arch/avr32/mach-at32ap/hmatrix.c
new file mode 100644
index 000000000..48f5ede77
--- /dev/null
+++ b/kernel/arch/avr32/mach-at32ap/hmatrix.c
@@ -0,0 +1,88 @@
+/*
+ * High-Speed Bus Matrix helper functions
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ *
+ * 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/clk.h>
+#include <linux/io.h>
+
+#include <mach/chip.h>
+#include <mach/hmatrix.h>
+
+static inline void __hmatrix_write_reg(unsigned long offset, u32 value)
+{
+	__raw_writel(value, (void __iomem __force *)(HMATRIX_BASE + offset));
+}
+
+static inline u32 __hmatrix_read_reg(unsigned long offset)
+{
+	return __raw_readl((void __iomem __force *)(HMATRIX_BASE + offset));
+}
+
+/**
+ * hmatrix_write_reg - write HMATRIX configuration register
+ * @offset: register offset
+ * @value: value to be written to the register at @offset
+ */
+void hmatrix_write_reg(unsigned long offset, u32 value)
+{
+	clk_enable(&at32_hmatrix_clk);
+	__hmatrix_write_reg(offset, value);
+	__hmatrix_read_reg(offset);
+	clk_disable(&at32_hmatrix_clk);
+}
+
+/**
+ * hmatrix_read_reg - read HMATRIX configuration register
+ * @offset: register offset
+ *
+ * Returns the value of the register at @offset.
+ */
+u32 hmatrix_read_reg(unsigned long offset)
+{
+	u32 value;
+
+	clk_enable(&at32_hmatrix_clk);
+	value = __hmatrix_read_reg(offset);
+	clk_disable(&at32_hmatrix_clk);
+
+	return value;
+}
+
+/**
+ * hmatrix_sfr_set_bits - set bits in a slave's Special Function Register
+ * @slave_id: operate on the SFR belonging to this slave
+ * @mask: mask of bits to be set in the SFR
+ */
+void hmatrix_sfr_set_bits(unsigned int slave_id, u32 mask)
+{
+	u32 value;
+
+	clk_enable(&at32_hmatrix_clk);
+	value = __hmatrix_read_reg(HMATRIX_SFR(slave_id));
+	value |= mask;
+	__hmatrix_write_reg(HMATRIX_SFR(slave_id), value);
+	__hmatrix_read_reg(HMATRIX_SFR(slave_id));
+	clk_disable(&at32_hmatrix_clk);
+}
+
+/**
+ * hmatrix_sfr_set_bits - clear bits in a slave's Special Function Register
+ * @slave_id: operate on the SFR belonging to this slave
+ * @mask: mask of bits to be cleared in the SFR
+ */
+void hmatrix_sfr_clear_bits(unsigned int slave_id, u32 mask)
+{
+	u32 value;
+
+	clk_enable(&at32_hmatrix_clk);
+	value = __hmatrix_read_reg(HMATRIX_SFR(slave_id));
+	value &= ~mask;
+	__hmatrix_write_reg(HMATRIX_SFR(slave_id), value);
+	__hmatrix_read_reg(HMATRIX_SFR(slave_id));
+	clk_disable(&at32_hmatrix_clk);
+}