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, 197 insertions, 0 deletions

diff --git a/kernel/drivers/regulator/pbias-regulator.c b/kernel/drivers/regulator/pbias-regulator.c
new file mode 100644
index 000000000..bd2b75c0d
--- /dev/null
+++ b/kernel/drivers/regulator/pbias-regulator.c
@@ -0,0 +1,197 @@
+/*
+ * pbias-regulator.c
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Balaji T K <balajitk@ti.com>
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/mfd/syscon.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+struct pbias_reg_info {
+	u32 enable;
+	u32 enable_mask;
+	u32 vmode;
+	unsigned int enable_time;
+	char *name;
+};
+
+struct pbias_regulator_data {
+	struct regulator_desc desc;
+	void __iomem *pbias_addr;
+	struct regulator_dev *dev;
+	struct regmap *syscon;
+	const struct pbias_reg_info *info;
+	int voltage;
+};
+
+static const unsigned int pbias_volt_table[] = {
+	1800000,
+	3000000
+};
+
+static struct regulator_ops pbias_regulator_voltage_ops = {
+	.list_voltage = regulator_list_voltage_table,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+};
+
+static const struct pbias_reg_info pbias_mmc_omap2430 = {
+	.enable = BIT(1),
+	.enable_mask = BIT(1),
+	.vmode = BIT(0),
+	.enable_time = 100,
+	.name = "pbias_mmc_omap2430"
+};
+
+static const struct pbias_reg_info pbias_sim_omap3 = {
+	.enable = BIT(9),
+	.enable_mask = BIT(9),
+	.vmode = BIT(8),
+	.enable_time = 100,
+	.name = "pbias_sim_omap3"
+};
+
+static const struct pbias_reg_info pbias_mmc_omap4 = {
+	.enable = BIT(26) | BIT(22),
+	.enable_mask = BIT(26) | BIT(25) | BIT(22),
+	.vmode = BIT(21),
+	.enable_time = 100,
+	.name = "pbias_mmc_omap4"
+};
+
+static const struct pbias_reg_info pbias_mmc_omap5 = {
+	.enable = BIT(27) | BIT(26),
+	.enable_mask = BIT(27) | BIT(25) | BIT(26),
+	.vmode = BIT(21),
+	.enable_time = 100,
+	.name = "pbias_mmc_omap5"
+};
+
+static struct of_regulator_match pbias_matches[] = {
+	{ .name = "pbias_mmc_omap2430", .driver_data = (void *)&pbias_mmc_omap2430},
+	{ .name = "pbias_sim_omap3", .driver_data = (void *)&pbias_sim_omap3},
+	{ .name = "pbias_mmc_omap4", .driver_data = (void *)&pbias_mmc_omap4},
+	{ .name = "pbias_mmc_omap5", .driver_data = (void *)&pbias_mmc_omap5},
+};
+#define PBIAS_NUM_REGS	ARRAY_SIZE(pbias_matches)
+
+static const struct of_device_id pbias_of_match[] = {
+	{ .compatible = "ti,pbias-omap", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, pbias_of_match);
+
+static int pbias_regulator_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct pbias_regulator_data *drvdata;
+	struct resource *res;
+	struct regulator_config cfg = { };
+	struct regmap *syscon;
+	const struct pbias_reg_info *info;
+	int ret = 0;
+	int count, idx, data_idx = 0;
+
+	count = of_regulator_match(&pdev->dev, np, pbias_matches,
+						PBIAS_NUM_REGS);
+	if (count < 0)
+		return count;
+
+	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct pbias_regulator_data)
+			       * count, GFP_KERNEL);
+	if (!drvdata)
+		return -ENOMEM;
+
+	syscon = syscon_regmap_lookup_by_phandle(np, "syscon");
+	if (IS_ERR(syscon))
+		return PTR_ERR(syscon);
+
+	cfg.regmap = syscon;
+	cfg.dev = &pdev->dev;
+
+	for (idx = 0; idx < PBIAS_NUM_REGS && data_idx < count; idx++) {
+		if (!pbias_matches[idx].init_data ||
+			!pbias_matches[idx].of_node)
+			continue;
+
+		info = pbias_matches[idx].driver_data;
+		if (!info)
+			return -ENODEV;
+
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		if (!res)
+			return -EINVAL;
+
+		drvdata[data_idx].syscon = syscon;
+		drvdata[data_idx].info = info;
+		drvdata[data_idx].desc.name = info->name;
+		drvdata[data_idx].desc.owner = THIS_MODULE;
+		drvdata[data_idx].desc.type = REGULATOR_VOLTAGE;
+		drvdata[data_idx].desc.ops = &pbias_regulator_voltage_ops;
+		drvdata[data_idx].desc.volt_table = pbias_volt_table;
+		drvdata[data_idx].desc.n_voltages = 2;
+		drvdata[data_idx].desc.enable_time = info->enable_time;
+		drvdata[data_idx].desc.vsel_reg = res->start;
+		drvdata[data_idx].desc.vsel_mask = info->vmode;
+		drvdata[data_idx].desc.enable_reg = res->start;
+		drvdata[data_idx].desc.enable_mask = info->enable_mask;
+		drvdata[data_idx].desc.enable_val = info->enable;
+
+		cfg.init_data = pbias_matches[idx].init_data;
+		cfg.driver_data = &drvdata[data_idx];
+		cfg.of_node = pbias_matches[idx].of_node;
+
+		drvdata[data_idx].dev = devm_regulator_register(&pdev->dev,
+					&drvdata[data_idx].desc, &cfg);
+		if (IS_ERR(drvdata[data_idx].dev)) {
+			ret = PTR_ERR(drvdata[data_idx].dev);
+			dev_err(&pdev->dev,
+				"Failed to register regulator: %d\n", ret);
+			goto err_regulator;
+		}
+		data_idx++;
+	}
+
+	platform_set_drvdata(pdev, drvdata);
+
+err_regulator:
+	return ret;
+}
+
+static struct platform_driver pbias_regulator_driver = {
+	.probe		= pbias_regulator_probe,
+	.driver		= {
+		.name		= "pbias-regulator",
+		.of_match_table = of_match_ptr(pbias_of_match),
+	},
+};
+
+module_platform_driver(pbias_regulator_driver);
+
+MODULE_AUTHOR("Balaji T K <balajitk@ti.com>");
+MODULE_DESCRIPTION("pbias voltage regulator");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pbias-regulator");