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, 204 insertions, 0 deletions

diff --git a/kernel/drivers/regulator/max77693.c b/kernel/drivers/regulator/max77693.c
new file mode 100644
index 000000000..9665a488e
--- /dev/null
+++ b/kernel/drivers/regulator/max77693.c
@@ -0,0 +1,204 @@
+/*
+ * max77693.c - Regulator driver for the Maxim 77693
+ *
+ * Copyright (C) 2013 Samsung Electronics
+ * Jonghwa Lee <jonghwa3.lee@samsung.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; 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
+ *
+ * This driver is based on max77686.c
+ */
+
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/max77693.h>
+#include <linux/mfd/max77693-private.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/regmap.h>
+
+#define CHGIN_ILIM_STEP_20mA			20000
+
+/* CHARGER regulator ops */
+/* CHARGER regulator uses two bits for enabling */
+static int max77693_chg_is_enabled(struct regulator_dev *rdev)
+{
+	int ret;
+	unsigned int val;
+
+	ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
+	if (ret)
+		return ret;
+
+	return (val & rdev->desc->enable_mask) == rdev->desc->enable_mask;
+}
+
+/*
+ * CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA
+ * 0x00, 0x01, 0x2, 0x03	= 60 mA
+ * 0x04 ~ 0x7E			= (60 + (X - 3) * 20) mA
+ */
+static int max77693_chg_get_current_limit(struct regulator_dev *rdev)
+{
+	unsigned int chg_min_uA = rdev->constraints->min_uA;
+	unsigned int chg_max_uA = rdev->constraints->max_uA;
+	unsigned int reg, sel;
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(rdev->regmap, MAX77693_CHG_REG_CHG_CNFG_09, &reg);
+	if (ret < 0)
+		return ret;
+
+	sel = reg & CHG_CNFG_09_CHGIN_ILIM_MASK;
+
+	/* the first four codes for charger current are all 60mA */
+	if (sel <= 3)
+		sel = 0;
+	else
+		sel -= 3;
+
+	val = chg_min_uA + CHGIN_ILIM_STEP_20mA * sel;
+	if (val > chg_max_uA)
+		return -EINVAL;
+
+	return val;
+}
+
+static int max77693_chg_set_current_limit(struct regulator_dev *rdev,
+						int min_uA, int max_uA)
+{
+	unsigned int chg_min_uA = rdev->constraints->min_uA;
+	int sel = 0;
+
+	while (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel < min_uA)
+		sel++;
+
+	if (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel > max_uA)
+		return -EINVAL;
+
+	/* the first four codes for charger current are all 60mA */
+	sel += 3;
+
+	return regmap_write(rdev->regmap,
+				MAX77693_CHG_REG_CHG_CNFG_09, sel);
+}
+/* end of CHARGER regulator ops */
+
+static const unsigned int max77693_safeout_table[] = {
+	4850000,
+	4900000,
+	4950000,
+	3300000,
+};
+
+static struct regulator_ops max77693_safeout_ops = {
+	.list_voltage		= regulator_list_voltage_table,
+	.is_enabled		= regulator_is_enabled_regmap,
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+};
+
+static struct regulator_ops max77693_charger_ops = {
+	.is_enabled		= max77693_chg_is_enabled,
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.get_current_limit	= max77693_chg_get_current_limit,
+	.set_current_limit	= max77693_chg_set_current_limit,
+};
+
+#define regulator_desc_esafeout(_num)	{			\
+	.name		= "ESAFEOUT"#_num,			\
+	.id		= MAX77693_ESAFEOUT##_num,		\
+	.of_match	= of_match_ptr("ESAFEOUT"#_num),	\
+	.regulators_node	= of_match_ptr("regulators"),	\
+	.n_voltages	= 4,					\
+	.ops		= &max77693_safeout_ops,		\
+	.type		= REGULATOR_VOLTAGE,			\
+	.owner		= THIS_MODULE,				\
+	.volt_table	= max77693_safeout_table,		\
+	.vsel_reg	= MAX77693_CHG_REG_SAFEOUT_CTRL,	\
+	.vsel_mask	= SAFEOUT_CTRL_SAFEOUT##_num##_MASK,	\
+	.enable_reg	= MAX77693_CHG_REG_SAFEOUT_CTRL,	\
+	.enable_mask	= SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK ,	\
+}
+
+static const struct regulator_desc regulators[] = {
+	regulator_desc_esafeout(1),
+	regulator_desc_esafeout(2),
+	{
+		.name = "CHARGER",
+		.id = MAX77693_CHARGER,
+		.of_match = of_match_ptr("CHARGER"),
+		.regulators_node = of_match_ptr("regulators"),
+		.ops = &max77693_charger_ops,
+		.type = REGULATOR_CURRENT,
+		.owner = THIS_MODULE,
+		.enable_reg = MAX77693_CHG_REG_CHG_CNFG_00,
+		.enable_mask = CHG_CNFG_00_CHG_MASK |
+				CHG_CNFG_00_BUCK_MASK,
+	},
+};
+
+static int max77693_pmic_probe(struct platform_device *pdev)
+{
+	struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+	int i;
+	struct regulator_config config = { };
+
+	config.dev = iodev->dev;
+	config.regmap = iodev->regmap;
+
+	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
+		struct regulator_dev *rdev;
+
+		rdev = devm_regulator_register(&pdev->dev,
+						&regulators[i], &config);
+		if (IS_ERR(rdev)) {
+			dev_err(&pdev->dev,
+				"Failed to initialize regulator-%d\n", i);
+			return PTR_ERR(rdev);
+		}
+	}
+
+	return 0;
+}
+
+static const struct platform_device_id max77693_pmic_id[] = {
+	{"max77693-pmic", 0},
+	{},
+};
+
+MODULE_DEVICE_TABLE(platform, max77693_pmic_id);
+
+static struct platform_driver max77693_pmic_driver = {
+	.driver = {
+		   .name = "max77693-pmic",
+		   },
+	.probe = max77693_pmic_probe,
+	.id_table = max77693_pmic_id,
+};
+
+module_platform_driver(max77693_pmic_driver);
+
+MODULE_DESCRIPTION("MAXIM MAX77693 regulator driver");
+MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>");
+MODULE_LICENSE("GPL");