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, 745 insertions, 0 deletions

diff --git a/kernel/drivers/regulator/ab3100.c b/kernel/drivers/regulator/ab3100.c
new file mode 100644
index 000000000..de2644490
--- /dev/null
+++ b/kernel/drivers/regulator/ab3100.c
@@ -0,0 +1,745 @@
+/*
+ * drivers/regulator/ab3100.c
+ *
+ * Copyright (C) 2008-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * Low-level control of the AB3100 IC Low Dropout (LDO)
+ * regulators, external regulator and buck converter
+ * Author: Mattias Wallin <mattias.wallin@stericsson.com>
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/mfd/ab3100.h>
+#include <linux/mfd/abx500.h>
+#include <linux/of.h>
+#include <linux/regulator/of_regulator.h>
+
+/* LDO registers and some handy masking definitions for AB3100 */
+#define AB3100_LDO_A		0x40
+#define AB3100_LDO_C		0x41
+#define AB3100_LDO_D		0x42
+#define AB3100_LDO_E		0x43
+#define AB3100_LDO_E_SLEEP	0x44
+#define AB3100_LDO_F		0x45
+#define AB3100_LDO_G		0x46
+#define AB3100_LDO_H		0x47
+#define AB3100_LDO_H_SLEEP_MODE	0
+#define AB3100_LDO_H_SLEEP_EN	2
+#define AB3100_LDO_ON		4
+#define AB3100_LDO_H_VSEL_AC	5
+#define AB3100_LDO_K		0x48
+#define AB3100_LDO_EXT		0x49
+#define AB3100_BUCK		0x4A
+#define AB3100_BUCK_SLEEP	0x4B
+#define AB3100_REG_ON_MASK	0x10
+
+/**
+ * struct ab3100_regulator
+ * A struct passed around the individual regulator functions
+ * @platform_device: platform device holding this regulator
+ * @dev: handle to the device
+ * @plfdata: AB3100 platform data passed in at probe time
+ * @regreg: regulator register number in the AB3100
+ */
+struct ab3100_regulator {
+	struct regulator_dev *rdev;
+	struct device *dev;
+	struct ab3100_platform_data *plfdata;
+	u8 regreg;
+};
+
+/* The order in which registers are initialized */
+static const u8 ab3100_reg_init_order[AB3100_NUM_REGULATORS+2] = {
+	AB3100_LDO_A,
+	AB3100_LDO_C,
+	AB3100_LDO_E,
+	AB3100_LDO_E_SLEEP,
+	AB3100_LDO_F,
+	AB3100_LDO_G,
+	AB3100_LDO_H,
+	AB3100_LDO_K,
+	AB3100_LDO_EXT,
+	AB3100_BUCK,
+	AB3100_BUCK_SLEEP,
+	AB3100_LDO_D,
+};
+
+/* Preset (hardware defined) voltages for these regulators */
+#define LDO_A_VOLTAGE 2750000
+#define LDO_C_VOLTAGE 2650000
+#define LDO_D_VOLTAGE 2650000
+
+static const unsigned int ldo_e_buck_typ_voltages[] = {
+	1800000,
+	1400000,
+	1300000,
+	1200000,
+	1100000,
+	1050000,
+	900000,
+};
+
+static const unsigned int ldo_f_typ_voltages[] = {
+	1800000,
+	1400000,
+	1300000,
+	1200000,
+	1100000,
+	1050000,
+	2500000,
+	2650000,
+};
+
+static const unsigned int ldo_g_typ_voltages[] = {
+	2850000,
+	2750000,
+	1800000,
+	1500000,
+};
+
+static const unsigned int ldo_h_typ_voltages[] = {
+	2750000,
+	1800000,
+	1500000,
+	1200000,
+};
+
+static const unsigned int ldo_k_typ_voltages[] = {
+	2750000,
+	1800000,
+};
+
+
+/* The regulator devices */
+static struct ab3100_regulator
+ab3100_regulators[AB3100_NUM_REGULATORS] = {
+	{
+		.regreg = AB3100_LDO_A,
+	},
+	{
+		.regreg = AB3100_LDO_C,
+	},
+	{
+		.regreg = AB3100_LDO_D,
+	},
+	{
+		.regreg = AB3100_LDO_E,
+	},
+	{
+		.regreg = AB3100_LDO_F,
+	},
+	{
+		.regreg = AB3100_LDO_G,
+	},
+	{
+		.regreg = AB3100_LDO_H,
+	},
+	{
+		.regreg = AB3100_LDO_K,
+	},
+	{
+		.regreg = AB3100_LDO_EXT,
+		/* No voltages for the external regulator */
+	},
+	{
+		.regreg = AB3100_BUCK,
+	},
+};
+
+/*
+ * General functions for enable, disable and is_enabled used for
+ * LDO: A,C,E,F,G,H,K,EXT and BUCK
+ */
+static int ab3100_enable_regulator(struct regulator_dev *reg)
+{
+	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
+	int err;
+	u8 regval;
+
+	err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg,
+						&regval);
+	if (err) {
+		dev_warn(&reg->dev, "failed to get regid %d value\n",
+			 abreg->regreg);
+		return err;
+	}
+
+	/* The regulator is already on, no reason to go further */
+	if (regval & AB3100_REG_ON_MASK)
+		return 0;
+
+	regval |= AB3100_REG_ON_MASK;
+
+	err = abx500_set_register_interruptible(abreg->dev, 0, abreg->regreg,
+						regval);
+	if (err) {
+		dev_warn(&reg->dev, "failed to set regid %d value\n",
+			 abreg->regreg);
+		return err;
+	}
+
+	return 0;
+}
+
+static int ab3100_disable_regulator(struct regulator_dev *reg)
+{
+	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
+	int err;
+	u8 regval;
+
+	/*
+	 * LDO D is a special regulator. When it is disabled, the entire
+	 * system is shut down. So this is handled specially.
+	 */
+	pr_info("Called ab3100_disable_regulator\n");
+	if (abreg->regreg == AB3100_LDO_D) {
+		dev_info(&reg->dev, "disabling LDO D - shut down system\n");
+		/* Setting LDO D to 0x00 cuts the power to the SoC */
+		return abx500_set_register_interruptible(abreg->dev, 0,
+							 AB3100_LDO_D, 0x00U);
+	}
+
+	/*
+	 * All other regulators are handled here
+	 */
+	err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg,
+						&regval);
+	if (err) {
+		dev_err(&reg->dev, "unable to get register 0x%x\n",
+			abreg->regreg);
+		return err;
+	}
+	regval &= ~AB3100_REG_ON_MASK;
+	return abx500_set_register_interruptible(abreg->dev, 0, abreg->regreg,
+						 regval);
+}
+
+static int ab3100_is_enabled_regulator(struct regulator_dev *reg)
+{
+	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
+	u8 regval;
+	int err;
+
+	err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg,
+						&regval);
+	if (err) {
+		dev_err(&reg->dev, "unable to get register 0x%x\n",
+			abreg->regreg);
+		return err;
+	}
+
+	return regval & AB3100_REG_ON_MASK;
+}
+
+static int ab3100_get_voltage_regulator(struct regulator_dev *reg)
+{
+	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
+	u8 regval;
+	int err;
+
+	/*
+	 * For variable types, read out setting and index into
+	 * supplied voltage list.
+	 */
+	err = abx500_get_register_interruptible(abreg->dev, 0,
+						abreg->regreg, &regval);
+	if (err) {
+		dev_warn(&reg->dev,
+			 "failed to get regulator value in register %02x\n",
+			 abreg->regreg);
+		return err;
+	}
+
+	/* The 3 highest bits index voltages */
+	regval &= 0xE0;
+	regval >>= 5;
+
+	if (regval >= reg->desc->n_voltages) {
+		dev_err(&reg->dev,
+			"regulator register %02x contains an illegal voltage setting\n",
+			abreg->regreg);
+		return -EINVAL;
+	}
+
+	return reg->desc->volt_table[regval];
+}
+
+static int ab3100_set_voltage_regulator_sel(struct regulator_dev *reg,
+					    unsigned selector)
+{
+	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
+	u8 regval;
+	int err;
+
+	err = abx500_get_register_interruptible(abreg->dev, 0,
+						abreg->regreg, &regval);
+	if (err) {
+		dev_warn(&reg->dev,
+			 "failed to get regulator register %02x\n",
+			 abreg->regreg);
+		return err;
+	}
+
+	/* The highest three bits control the variable regulators */
+	regval &= ~0xE0;
+	regval |= (selector << 5);
+
+	err = abx500_set_register_interruptible(abreg->dev, 0,
+						abreg->regreg, regval);
+	if (err)
+		dev_warn(&reg->dev, "failed to set regulator register %02x\n",
+			abreg->regreg);
+
+	return err;
+}
+
+static int ab3100_set_suspend_voltage_regulator(struct regulator_dev *reg,
+						int uV)
+{
+	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
+	u8 regval;
+	int err;
+	int bestindex;
+	u8 targetreg;
+
+	if (abreg->regreg == AB3100_LDO_E)
+		targetreg = AB3100_LDO_E_SLEEP;
+	else if (abreg->regreg == AB3100_BUCK)
+		targetreg = AB3100_BUCK_SLEEP;
+	else
+		return -EINVAL;
+
+	/* LDO E and BUCK have special suspend voltages you can set */
+	bestindex = regulator_map_voltage_iterate(reg, uV, uV);
+
+	err = abx500_get_register_interruptible(abreg->dev, 0,
+						targetreg, &regval);
+	if (err) {
+		dev_warn(&reg->dev,
+			 "failed to get regulator register %02x\n",
+			 targetreg);
+		return err;
+	}
+
+	/* The highest three bits control the variable regulators */
+	regval &= ~0xE0;
+	regval |= (bestindex << 5);
+
+	err = abx500_set_register_interruptible(abreg->dev, 0,
+						targetreg, regval);
+	if (err)
+		dev_warn(&reg->dev, "failed to set regulator register %02x\n",
+			abreg->regreg);
+
+	return err;
+}
+
+/*
+ * The external regulator can just define a fixed voltage.
+ */
+static int ab3100_get_voltage_regulator_external(struct regulator_dev *reg)
+{
+	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
+
+	if (abreg->plfdata)
+		return abreg->plfdata->external_voltage;
+	else
+		/* TODO: encode external voltage into device tree */
+		return 0;
+}
+
+static struct regulator_ops regulator_ops_fixed = {
+	.list_voltage = regulator_list_voltage_linear,
+	.enable      = ab3100_enable_regulator,
+	.disable     = ab3100_disable_regulator,
+	.is_enabled  = ab3100_is_enabled_regulator,
+};
+
+static struct regulator_ops regulator_ops_variable = {
+	.enable      = ab3100_enable_regulator,
+	.disable     = ab3100_disable_regulator,
+	.is_enabled  = ab3100_is_enabled_regulator,
+	.get_voltage = ab3100_get_voltage_regulator,
+	.set_voltage_sel = ab3100_set_voltage_regulator_sel,
+	.list_voltage = regulator_list_voltage_table,
+};
+
+static struct regulator_ops regulator_ops_variable_sleepable = {
+	.enable      = ab3100_enable_regulator,
+	.disable     = ab3100_disable_regulator,
+	.is_enabled  = ab3100_is_enabled_regulator,
+	.get_voltage = ab3100_get_voltage_regulator,
+	.set_voltage_sel = ab3100_set_voltage_regulator_sel,
+	.set_suspend_voltage = ab3100_set_suspend_voltage_regulator,
+	.list_voltage = regulator_list_voltage_table,
+};
+
+/*
+ * LDO EXT is an external regulator so it is really
+ * not possible to set any voltage locally here, AB3100
+ * is an on/off switch plain an simple. The external
+ * voltage is defined in the board set-up if any.
+ */
+static struct regulator_ops regulator_ops_external = {
+	.enable      = ab3100_enable_regulator,
+	.disable     = ab3100_disable_regulator,
+	.is_enabled  = ab3100_is_enabled_regulator,
+	.get_voltage = ab3100_get_voltage_regulator_external,
+};
+
+static struct regulator_desc
+ab3100_regulator_desc[AB3100_NUM_REGULATORS] = {
+	{
+		.name = "LDO_A",
+		.id   = AB3100_LDO_A,
+		.ops  = &regulator_ops_fixed,
+		.n_voltages = 1,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.min_uV = LDO_A_VOLTAGE,
+		.enable_time = 200,
+	},
+	{
+		.name = "LDO_C",
+		.id   = AB3100_LDO_C,
+		.ops  = &regulator_ops_fixed,
+		.n_voltages = 1,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.min_uV = LDO_C_VOLTAGE,
+		.enable_time = 200,
+	},
+	{
+		.name = "LDO_D",
+		.id   = AB3100_LDO_D,
+		.ops  = &regulator_ops_fixed,
+		.n_voltages = 1,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.min_uV = LDO_D_VOLTAGE,
+		.enable_time = 200,
+	},
+	{
+		.name = "LDO_E",
+		.id   = AB3100_LDO_E,
+		.ops  = &regulator_ops_variable_sleepable,
+		.n_voltages = ARRAY_SIZE(ldo_e_buck_typ_voltages),
+		.volt_table = ldo_e_buck_typ_voltages,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.enable_time = 200,
+	},
+	{
+		.name = "LDO_F",
+		.id   = AB3100_LDO_F,
+		.ops  = &regulator_ops_variable,
+		.n_voltages = ARRAY_SIZE(ldo_f_typ_voltages),
+		.volt_table = ldo_f_typ_voltages,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.enable_time = 600,
+	},
+	{
+		.name = "LDO_G",
+		.id   = AB3100_LDO_G,
+		.ops  = &regulator_ops_variable,
+		.n_voltages = ARRAY_SIZE(ldo_g_typ_voltages),
+		.volt_table = ldo_g_typ_voltages,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.enable_time = 400,
+	},
+	{
+		.name = "LDO_H",
+		.id   = AB3100_LDO_H,
+		.ops  = &regulator_ops_variable,
+		.n_voltages = ARRAY_SIZE(ldo_h_typ_voltages),
+		.volt_table = ldo_h_typ_voltages,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.enable_time = 200,
+	},
+	{
+		.name = "LDO_K",
+		.id   = AB3100_LDO_K,
+		.ops  = &regulator_ops_variable,
+		.n_voltages = ARRAY_SIZE(ldo_k_typ_voltages),
+		.volt_table = ldo_k_typ_voltages,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.enable_time = 200,
+	},
+	{
+		.name = "LDO_EXT",
+		.id   = AB3100_LDO_EXT,
+		.ops  = &regulator_ops_external,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+	},
+	{
+		.name = "BUCK",
+		.id   = AB3100_BUCK,
+		.ops  = &regulator_ops_variable_sleepable,
+		.n_voltages = ARRAY_SIZE(ldo_e_buck_typ_voltages),
+		.volt_table = ldo_e_buck_typ_voltages,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.enable_time = 1000,
+	},
+};
+
+static int ab3100_regulator_register(struct platform_device *pdev,
+				     struct ab3100_platform_data *plfdata,
+				     struct regulator_init_data *init_data,
+				     struct device_node *np,
+				     unsigned long id)
+{
+	struct regulator_desc *desc;
+	struct ab3100_regulator *reg;
+	struct regulator_dev *rdev;
+	struct regulator_config config = { };
+	int err, i;
+
+	for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
+		desc = &ab3100_regulator_desc[i];
+		if (desc->id == id)
+			break;
+	}
+	if (desc->id != id)
+		return -ENODEV;
+
+	/* Same index used for this array */
+	reg = &ab3100_regulators[i];
+
+	/*
+	 * Initialize per-regulator struct.
+	 * Inherit platform data, this comes down from the
+	 * i2c boarddata, from the machine. So if you want to
+	 * see what it looks like for a certain machine, go
+	 * into the machine I2C setup.
+	 */
+	reg->dev = &pdev->dev;
+	if (plfdata) {
+		reg->plfdata = plfdata;
+		config.init_data = &plfdata->reg_constraints[i];
+	} else if (np) {
+		config.of_node = np;
+		config.init_data = init_data;
+	}
+	config.dev = &pdev->dev;
+	config.driver_data = reg;
+
+	rdev = devm_regulator_register(&pdev->dev, desc, &config);
+	if (IS_ERR(rdev)) {
+		err = PTR_ERR(rdev);
+		dev_err(&pdev->dev,
+			"%s: failed to register regulator %s err %d\n",
+			__func__, desc->name,
+			err);
+		return err;
+	}
+
+	/* Then set a pointer back to the registered regulator */
+	reg->rdev = rdev;
+	return 0;
+}
+
+static struct of_regulator_match ab3100_regulator_matches[] = {
+	{ .name = "ab3100_ldo_a", .driver_data = (void *) AB3100_LDO_A, },
+	{ .name = "ab3100_ldo_c", .driver_data = (void *) AB3100_LDO_C, },
+	{ .name = "ab3100_ldo_d", .driver_data = (void *) AB3100_LDO_D, },
+	{ .name = "ab3100_ldo_e", .driver_data = (void *) AB3100_LDO_E, },
+	{ .name = "ab3100_ldo_f", .driver_data = (void *) AB3100_LDO_F },
+	{ .name = "ab3100_ldo_g", .driver_data = (void *) AB3100_LDO_G },
+	{ .name = "ab3100_ldo_h", .driver_data = (void *) AB3100_LDO_H },
+	{ .name = "ab3100_ldo_k", .driver_data = (void *) AB3100_LDO_K },
+	{ .name = "ab3100_ext", .driver_data = (void *) AB3100_LDO_EXT },
+	{ .name = "ab3100_buck", .driver_data = (void *) AB3100_BUCK },
+};
+
+/*
+ * Initial settings of ab3100 registers.
+ * Common for below LDO regulator settings are that
+ * bit 7-5 controls voltage. Bit 4 turns regulator ON(1) or OFF(0).
+ * Bit 3-2 controls sleep enable and bit 1-0 controls sleep mode.
+ */
+/* LDO_A 0x16: 2.75V, ON, SLEEP_A, SLEEP OFF GND */
+#define LDO_A_SETTING		0x16
+/* LDO_C 0x10: 2.65V, ON, SLEEP_A or B, SLEEP full power */
+#define LDO_C_SETTING		0x10
+/* LDO_D 0x10: 2.65V, ON, sleep mode not used */
+#define LDO_D_SETTING		0x10
+/* LDO_E 0x10: 1.8V, ON, SLEEP_A or B, SLEEP full power */
+#define LDO_E_SETTING		0x10
+/* LDO_E SLEEP 0x00: 1.8V, not used, SLEEP_A or B, not used */
+#define LDO_E_SLEEP_SETTING	0x00
+/* LDO_F 0xD0: 2.5V, ON, SLEEP_A or B, SLEEP full power */
+#define LDO_F_SETTING		0xD0
+/* LDO_G 0x00: 2.85V, OFF, SLEEP_A or B, SLEEP full power */
+#define LDO_G_SETTING		0x00
+/* LDO_H 0x18: 2.75V, ON, SLEEP_B, SLEEP full power */
+#define LDO_H_SETTING		0x18
+/* LDO_K 0x00: 2.75V, OFF, SLEEP_A or B, SLEEP full power */
+#define LDO_K_SETTING		0x00
+/* LDO_EXT 0x00: Voltage not set, OFF, not used, not used */
+#define LDO_EXT_SETTING		0x00
+/* BUCK 0x7D: 1.2V, ON, SLEEP_A and B, SLEEP low power */
+#define BUCK_SETTING	0x7D
+/* BUCK SLEEP 0xAC: 1.05V, Not used, SLEEP_A and B, Not used */
+#define BUCK_SLEEP_SETTING	0xAC
+
+static const u8 ab3100_reg_initvals[] = {
+	LDO_A_SETTING,
+	LDO_C_SETTING,
+	LDO_E_SETTING,
+	LDO_E_SLEEP_SETTING,
+	LDO_F_SETTING,
+	LDO_G_SETTING,
+	LDO_H_SETTING,
+	LDO_K_SETTING,
+	LDO_EXT_SETTING,
+	BUCK_SETTING,
+	BUCK_SLEEP_SETTING,
+	LDO_D_SETTING,
+};
+
+static int ab3100_regulators_remove(struct platform_device *pdev)
+{
+	int i;
+
+	for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
+		struct ab3100_regulator *reg = &ab3100_regulators[i];
+
+		reg->rdev = NULL;
+	}
+	return 0;
+}
+
+static int
+ab3100_regulator_of_probe(struct platform_device *pdev, struct device_node *np)
+{
+	int err, i;
+
+	/*
+	 * Set up the regulator registers, as was previously done with
+	 * platform data.
+	 */
+	/* Set up regulators */
+	for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) {
+		err = abx500_set_register_interruptible(&pdev->dev, 0,
+					ab3100_reg_init_order[i],
+					ab3100_reg_initvals[i]);
+		if (err) {
+			dev_err(&pdev->dev, "regulator initialization failed with error %d\n",
+				err);
+			return err;
+		}
+	}
+
+	for (i = 0; i < ARRAY_SIZE(ab3100_regulator_matches); i++) {
+		err = ab3100_regulator_register(
+			pdev, NULL, ab3100_regulator_matches[i].init_data,
+			ab3100_regulator_matches[i].of_node,
+			(unsigned long)ab3100_regulator_matches[i].driver_data);
+		if (err) {
+			ab3100_regulators_remove(pdev);
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+
+static int ab3100_regulators_probe(struct platform_device *pdev)
+{
+	struct ab3100_platform_data *plfdata = dev_get_platdata(&pdev->dev);
+	struct device_node *np = pdev->dev.of_node;
+	int err = 0;
+	u8 data;
+	int i;
+
+	/* Check chip state */
+	err = abx500_get_register_interruptible(&pdev->dev, 0,
+						AB3100_LDO_D, &data);
+	if (err) {
+		dev_err(&pdev->dev, "could not read initial status of LDO_D\n");
+		return err;
+	}
+	if (data & 0x10)
+		dev_notice(&pdev->dev,
+			   "chip is already in active mode (Warm start)\n");
+	else
+		dev_notice(&pdev->dev,
+			   "chip is in inactive mode (Cold start)\n");
+
+	if (np) {
+		err = of_regulator_match(&pdev->dev, np,
+					 ab3100_regulator_matches,
+					 ARRAY_SIZE(ab3100_regulator_matches));
+		if (err < 0) {
+			dev_err(&pdev->dev,
+				"Error parsing regulator init data: %d\n", err);
+			return err;
+		}
+		return ab3100_regulator_of_probe(pdev, np);
+	}
+
+	/* Set up regulators */
+	for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) {
+		err = abx500_set_register_interruptible(&pdev->dev, 0,
+					ab3100_reg_init_order[i],
+					plfdata->reg_initvals[i]);
+		if (err) {
+			dev_err(&pdev->dev, "regulator initialization failed with error %d\n",
+				err);
+			return err;
+		}
+	}
+
+	/* Register the regulators */
+	for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
+		struct regulator_desc *desc = &ab3100_regulator_desc[i];
+
+		err = ab3100_regulator_register(pdev, plfdata, NULL, NULL,
+						desc->id);
+		if (err) {
+			ab3100_regulators_remove(pdev);
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+static struct platform_driver ab3100_regulators_driver = {
+	.driver = {
+		.name  = "ab3100-regulators",
+	},
+	.probe = ab3100_regulators_probe,
+	.remove = ab3100_regulators_remove,
+};
+
+static __init int ab3100_regulators_init(void)
+{
+	return platform_driver_register(&ab3100_regulators_driver);
+}
+
+static __exit void ab3100_regulators_exit(void)
+{
+	platform_driver_unregister(&ab3100_regulators_driver);
+}
+
+subsys_initcall(ab3100_regulators_init);
+module_exit(ab3100_regulators_exit);
+
+MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>");
+MODULE_DESCRIPTION("AB3100 Regulator driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:ab3100-regulators");