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, 146 insertions, 0 deletions

diff --git a/kernel/drivers/clk/qcom/common.c b/kernel/drivers/clk/qcom/common.c
new file mode 100644
index 000000000..f7101e330
--- /dev/null
+++ b/kernel/drivers/clk/qcom/common.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#include <linux/export.h>
+#include <linux/regmap.h>
+#include <linux/platform_device.h>
+#include <linux/clk-provider.h>
+#include <linux/reset-controller.h>
+
+#include "common.h"
+#include "clk-rcg.h"
+#include "clk-regmap.h"
+#include "reset.h"
+
+struct qcom_cc {
+	struct qcom_reset_controller reset;
+	struct clk_onecell_data data;
+	struct clk *clks[];
+};
+
+const
+struct freq_tbl *qcom_find_freq(const struct freq_tbl *f, unsigned long rate)
+{
+	if (!f)
+		return NULL;
+
+	for (; f->freq; f++)
+		if (rate <= f->freq)
+			return f;
+
+	/* Default to our fastest rate */
+	return f - 1;
+}
+EXPORT_SYMBOL_GPL(qcom_find_freq);
+
+int qcom_find_src_index(struct clk_hw *hw, const struct parent_map *map, u8 src)
+{
+	int i, num_parents = __clk_get_num_parents(hw->clk);
+
+	for (i = 0; i < num_parents; i++)
+		if (src == map[i].src)
+			return i;
+
+	return -ENOENT;
+}
+EXPORT_SYMBOL_GPL(qcom_find_src_index);
+
+struct regmap *
+qcom_cc_map(struct platform_device *pdev, const struct qcom_cc_desc *desc)
+{
+	void __iomem *base;
+	struct resource *res;
+	struct device *dev = &pdev->dev;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(base))
+		return ERR_CAST(base);
+
+	return devm_regmap_init_mmio(dev, base, desc->config);
+}
+EXPORT_SYMBOL_GPL(qcom_cc_map);
+
+int qcom_cc_really_probe(struct platform_device *pdev,
+			 const struct qcom_cc_desc *desc, struct regmap *regmap)
+{
+	int i, ret;
+	struct device *dev = &pdev->dev;
+	struct clk *clk;
+	struct clk_onecell_data *data;
+	struct clk **clks;
+	struct qcom_reset_controller *reset;
+	struct qcom_cc *cc;
+	size_t num_clks = desc->num_clks;
+	struct clk_regmap **rclks = desc->clks;
+
+	cc = devm_kzalloc(dev, sizeof(*cc) + sizeof(*clks) * num_clks,
+			  GFP_KERNEL);
+	if (!cc)
+		return -ENOMEM;
+
+	clks = cc->clks;
+	data = &cc->data;
+	data->clks = clks;
+	data->clk_num = num_clks;
+
+	for (i = 0; i < num_clks; i++) {
+		if (!rclks[i]) {
+			clks[i] = ERR_PTR(-ENOENT);
+			continue;
+		}
+		clk = devm_clk_register_regmap(dev, rclks[i]);
+		if (IS_ERR(clk))
+			return PTR_ERR(clk);
+		clks[i] = clk;
+	}
+
+	ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, data);
+	if (ret)
+		return ret;
+
+	reset = &cc->reset;
+	reset->rcdev.of_node = dev->of_node;
+	reset->rcdev.ops = &qcom_reset_ops;
+	reset->rcdev.owner = dev->driver->owner;
+	reset->rcdev.nr_resets = desc->num_resets;
+	reset->regmap = regmap;
+	reset->reset_map = desc->resets;
+	platform_set_drvdata(pdev, &reset->rcdev);
+
+	ret = reset_controller_register(&reset->rcdev);
+	if (ret)
+		of_clk_del_provider(dev->of_node);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(qcom_cc_really_probe);
+
+int qcom_cc_probe(struct platform_device *pdev, const struct qcom_cc_desc *desc)
+{
+	struct regmap *regmap;
+
+	regmap = qcom_cc_map(pdev, desc);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return qcom_cc_really_probe(pdev, desc, regmap);
+}
+EXPORT_SYMBOL_GPL(qcom_cc_probe);
+
+void qcom_cc_remove(struct platform_device *pdev)
+{
+	of_clk_del_provider(pdev->dev.of_node);
+	reset_controller_unregister(platform_get_drvdata(pdev));
+}
+EXPORT_SYMBOL_GPL(qcom_cc_remove);