Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: (27 commits)
  regulator: wm831x_reg_read() failure unnoticed in wm831x_aldo_get_mode()
  twl-regulator: Fix reg_disable functionality for 4030 and 6030
  twl-regulator: Add turnon delay to reg_enable
  twl-regulator: Restore REMAP configuration in regulator probe
  twl-regulator: Add turnon-delay and REMAP config to twlreg_info struct
  twl-regulator: Define critical regulators as always_on
  twl-regulator: Add all twl4030 regulators to twlreg_info
  regulator: mc13783-regulator: correct the probing time.
  regulator: Fix unbalanced disables/enables in regulator_bulk_{enable,disable} error path
  regulator: core.c: Small coding style cleanup (indentation fixup)
  drivers/regulator: use PTR_ERR to get error code
  regulator: consumer.h - fix build when consumer.h is #included first.
  regulator/mc13783: various cleanups
  regulator/mc13783: rename source file to match other drivers
  Fix some AB3100 regulator issues
  regulator: keep index within bounds in da9034_get_ldo12_voltage()
  regulator: Ensure val is initialised in 88pm8607 choose_voltage()
  regulator: Remove duplicate consts from ab3100
  regulator: Handle regulators without suspend mode configuration
  regulator: Factor out regulator name pretty printing
  ...

drivers/regulator/88pm8607.c

@@ -0,0 +1,685 @@
+/*
+ * Regulators driver for Marvell 88PM8607
+ *
+ * Copyright (C) 2009 Marvell International Ltd.
+ * 	Haojian Zhuang <haojian.zhuang@marvell.com>
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/88pm8607.h>
+
+struct pm8607_regulator_info {
+	struct regulator_desc	desc;
+	struct pm8607_chip	*chip;
+	struct regulator_dev	*regulator;
+
+	int	min_uV;
+	int	max_uV;
+	int	step_uV;
+	int	vol_reg;
+	int	vol_shift;
+	int	vol_nbits;
+	int	update_reg;
+	int	update_bit;
+	int	enable_reg;
+	int	enable_bit;
+	int	slope_double;
+};
+
+static inline int check_range(struct pm8607_regulator_info *info,
+				int min_uV, int max_uV)
+{
+	if (max_uV < info->min_uV || min_uV > info->max_uV || min_uV > max_uV)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index)
+{
+	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
+	uint8_t chip_id = info->chip->chip_id;
+	int ret = -EINVAL;
+
+	switch (info->desc.id) {
+	case PM8607_ID_BUCK1:
+		ret = (index < 0x1d) ? (index * 25000 + 800000) :
+			((index < 0x20) ? 1500000 :
+			((index < 0x40) ? ((index - 0x20) * 25000) :
+			-EINVAL));
+		break;
+	case PM8607_ID_BUCK3:
+		ret = (index < 0x3d) ? (index * 25000) :
+			((index < 0x40) ? 1500000 : -EINVAL);
+		if (ret < 0)
+			break;
+		if (info->slope_double)
+			ret <<= 1;
+		break;
+	case PM8607_ID_LDO1:
+		ret = (index == 0) ? 1800000 :
+			((index == 1) ? 1200000 :
+			((index == 2) ? 2800000 : -EINVAL));
+		break;
+	case PM8607_ID_LDO5:
+		ret = (index == 0) ? 2900000 :
+			((index == 1) ? 3000000 :
+			((index == 2) ? 3100000 : 3300000));
+		break;
+	case PM8607_ID_LDO7:
+	case PM8607_ID_LDO8:
+		ret = (index < 3) ? (index * 50000 + 1800000) :
+			((index < 8) ? (index * 50000 + 2550000) :
+			 -EINVAL);
+		break;
+	case PM8607_ID_LDO12:
+		ret = (index < 2) ? (index * 100000 + 1800000) :
+			((index < 7) ? (index * 100000 + 2500000) :
+			((index == 7) ? 3300000 : 1200000));
+		break;
+	case PM8607_ID_LDO2:
+	case PM8607_ID_LDO3:
+	case PM8607_ID_LDO9:
+		switch (chip_id) {
+		case PM8607_CHIP_A0:
+		case PM8607_CHIP_A1:
+			ret = (index < 3) ? (index * 50000 + 1800000) :
+				((index < 8) ? (index * 50000 + 2550000) :
+				 -EINVAL);
+			break;
+		case PM8607_CHIP_B0:
+			ret = (index < 3) ? (index * 50000 + 1800000) :
+				((index < 7) ? (index * 50000 + 2550000) :
+				3300000);
+			break;
+		}
+		break;
+	case PM8607_ID_LDO4:
+		switch (chip_id) {
+		case PM8607_CHIP_A0:
+		case PM8607_CHIP_A1:
+			ret = (index < 3) ? (index * 50000 + 1800000) :
+				((index < 8) ? (index * 50000 + 2550000) :
+				 -EINVAL);
+			break;
+		case PM8607_CHIP_B0:
+			ret = (index < 3) ? (index * 50000 + 1800000) :
+				((index < 6) ? (index * 50000 + 2550000) :
+				((index == 6) ? 2900000 : 3300000));
+			break;
+		}
+		break;
+	case PM8607_ID_LDO6:
+		switch (chip_id) {
+		case PM8607_CHIP_A0:
+		case PM8607_CHIP_A1:
+			ret = (index < 3) ? (index * 50000 + 1800000) :
+				((index < 8) ? (index * 50000 + 2450000) :
+				-EINVAL);
+			break;
+		case PM8607_CHIP_B0:
+			ret = (index < 2) ? (index * 50000 + 1800000) :
+				((index < 7) ? (index * 50000 + 2500000) :
+				3300000);
+			break;
+		}
+		break;
+	case PM8607_ID_LDO10:
+		switch (chip_id) {
+		case PM8607_CHIP_A0:
+		case PM8607_CHIP_A1:
+			ret = (index < 3) ? (index * 50000 + 1800000) :
+				((index < 8) ? (index * 50000 + 2550000) :
+				1200000);
+			break;
+		case PM8607_CHIP_B0:
+			ret = (index < 3) ? (index * 50000 + 1800000) :
+				((index < 7) ? (index * 50000 + 2550000) :
+				((index == 7) ? 3300000 : 1200000));
+			break;
+		}
+		break;
+	case PM8607_ID_LDO14:
+		switch (chip_id) {
+		case PM8607_CHIP_A0:
+		case PM8607_CHIP_A1:
+			ret = (index < 3) ? (index * 50000 + 1800000) :
+				((index < 8) ? (index * 50000 + 2550000) :
+				 -EINVAL);
+			break;
+		case PM8607_CHIP_B0:
+			ret = (index < 2) ? (index * 50000 + 1800000) :
+				((index < 7) ? (index * 50000 + 2600000) :
+				3300000);
+			break;
+		}
+		break;
+	}
+	return ret;
+}
+
+static int choose_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
+{
+	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
+	uint8_t chip_id = info->chip->chip_id;
+	int val = -ENOENT;
+	int ret;
+
+	switch (info->desc.id) {
+	case PM8607_ID_BUCK1:
+		if (min_uV >= 800000) 		/* 800mV ~ 1500mV / 25mV */
+			val = (min_uV - 775001) / 25000;
+		else {				/* 25mV ~ 775mV / 25mV */
+			val = (min_uV + 249999) / 25000;
+			val += 32;
+		}
+		break;
+	case PM8607_ID_BUCK3:
+		if (info->slope_double)
+			min_uV = min_uV >> 1;
+		val = (min_uV + 249999) / 25000; /* 0mV ~ 1500mV / 25mV */
+
+		break;
+	case PM8607_ID_LDO1:
+		if (min_uV > 1800000)
+			val = 2;
+		else if (min_uV > 1200000)
+			val = 0;
+		else
+			val = 1;
+		break;
+	case PM8607_ID_LDO5:
+		if (min_uV > 3100000)
+			val = 3;
+		else				/* 2900mV ~ 3100mV / 100mV */
+			val = (min_uV - 2800001) / 100000;
+		break;
+	case PM8607_ID_LDO7:
+	case PM8607_ID_LDO8:
+		if (min_uV < 2700000) {	/* 1800mV ~ 1900mV / 50mV */
+			if (min_uV <= 1800000)
+				val = 0;	/* 1800mv */
+			else if (min_uV <= 1900000)
+				val = (min_uV - 1750001) / 50000;
+			else
+				val = 3;	/* 2700mV */
+		} else {		 /* 2700mV ~ 2900mV / 50mV */
+			if (min_uV <= 2900000) {
+				val = (min_uV - 2650001) / 50000;
+				val += 3;
+			} else
+				val = -EINVAL;
+		}
+		break;
+	case PM8607_ID_LDO10:
+		if (min_uV > 2850000)
+			val = 7;
+		else if (min_uV <= 1200000)
+			val = 8;
+		else if (min_uV < 2700000)	/* 1800mV ~ 1900mV / 50mV */
+			val = (min_uV - 1750001) / 50000;
+		else {				/* 2700mV ~ 2850mV / 50mV */
+			val = (min_uV - 2650001) / 50000;
+			val += 3;
+		}
+		break;
+	case PM8607_ID_LDO12:
+		if (min_uV < 2700000) {		/* 1800mV ~ 1900mV / 100mV */
+			if (min_uV <= 1200000)
+				val = 8;	/* 1200mV */
+			else if (min_uV <= 1800000)
+				val = 0;	/* 1800mV */
+			else if (min_uV <= 1900000)
+				val = (min_uV - 1700001) / 100000;
+			else
+				val = 2;	/* 2700mV */
+		} else {			/* 2700mV ~ 3100mV / 100mV */
+			if (min_uV <= 3100000) {
+				val = (min_uV - 2600001) / 100000;
+				val += 2;
+			} else if (min_uV <= 3300000)
+				val = 7;
+			else
+				val = -EINVAL;
+		}
+		break;
+	case PM8607_ID_LDO2:
+	case PM8607_ID_LDO3:
+	case PM8607_ID_LDO9:
+		switch (chip_id) {
+		case PM8607_CHIP_A0:
+		case PM8607_CHIP_A1:
+			if (min_uV < 2700000)	/* 1800mV ~ 1900mV / 50mV */
+				if (min_uV <= 1800000)
+					val = 0;
+				else if (min_uV <= 1900000)
+					val = (min_uV - 1750001) / 50000;
+				else
+					val = 3;	/* 2700mV */
+			else {			/* 2700mV ~ 2900mV / 50mV */
+				if (min_uV <= 2900000) {
+					val = (min_uV - 2650001) / 50000;
+					val += 3;
+				} else
+					val = -EINVAL;
+			}
+			break;
+		case PM8607_CHIP_B0:
+			if (min_uV < 2700000) {	/* 1800mV ~ 1900mV / 50mV */
+				if (min_uV <= 1800000)
+					val = 0;
+				else if (min_uV <= 1900000)
+					val = (min_uV - 1750001) / 50000;
+				else
+					val = 3;	/* 2700mV */
+			} else {		 /* 2700mV ~ 2850mV / 50mV */
+				if (min_uV <= 2850000) {
+					val = (min_uV - 2650001) / 50000;
+					val += 3;
+				} else if (min_uV <= 3300000)
+					val = 7;
+				else
+					val = -EINVAL;
+			}
+			break;
+		}
+		break;
+	case PM8607_ID_LDO4:
+		switch (chip_id) {
+		case PM8607_CHIP_A0:
+		case PM8607_CHIP_A1:
+			if (min_uV < 2700000)	/* 1800mV ~ 1900mV / 50mV */
+				if (min_uV <= 1800000)
+					val = 0;
+				else if (min_uV <= 1900000)
+					val = (min_uV - 1750001) / 50000;
+				else
+					val = 3;	/* 2700mV */
+			else {			/* 2700mV ~ 2900mV / 50mV */
+				if (min_uV <= 2900000) {
+					val = (min_uV - 2650001) / 50000;
+					val += 3;
+				} else
+					val = -EINVAL;
+			}
+			break;
+		case PM8607_CHIP_B0:
+			if (min_uV < 2700000) {	/* 1800mV ~ 1900mV / 50mV */
+				if (min_uV <= 1800000)
+					val = 0;
+				else if (min_uV <= 1900000)
+					val = (min_uV - 1750001) / 50000;
+				else
+					val = 3;	/* 2700mV */
+			} else {		 /* 2700mV ~ 2800mV / 50mV */
+				if (min_uV <= 2850000) {
+					val = (min_uV - 2650001) / 50000;
+					val += 3;
+				} else if (min_uV <= 2900000)
+					val = 6;
+				else if (min_uV <= 3300000)
+					val = 7;
+				else
+					val = -EINVAL;
+			}
+			break;
+		}
+		break;
+	case PM8607_ID_LDO6:
+		switch (chip_id) {
+		case PM8607_CHIP_A0:
+		case PM8607_CHIP_A1:
+			if (min_uV < 2600000) {	/* 1800mV ~ 1900mV / 50mV */
+				if (min_uV <= 1800000)
+					val = 0;
+				else if (min_uV <= 1900000)
+					val = (min_uV - 1750001) / 50000;
+				else
+					val = 3;	/* 2600mV */
+			} else {		/* 2600mV ~ 2800mV / 50mV */
+				if (min_uV <= 2800000) {
+					val = (min_uV - 2550001) / 50000;
+					val += 3;
+				} else
+					val = -EINVAL;
+			}
+			break;
+		case PM8607_CHIP_B0:
+			if (min_uV < 2600000) {	/* 1800mV ~ 1850mV / 50mV */
+				if (min_uV <= 1800000)
+					val = 0;
+				else if (min_uV <= 1850000)
+					val = (min_uV - 1750001) / 50000;
+				else
+					val = 2;	/* 2600mV */
+			} else {		/* 2600mV ~ 2800mV / 50mV */
+				if (min_uV <= 2800000) {
+					val = (min_uV - 2550001) / 50000;
+					val += 2;
+				} else if (min_uV <= 3300000)
+					val = 7;
+				else
+					val = -EINVAL;
+			}
+			break;
+		}
+		break;
+	case PM8607_ID_LDO14:
+		switch (chip_id) {
+		case PM8607_CHIP_A0:
+		case PM8607_CHIP_A1:
+			if (min_uV < 2700000) {	/* 1800mV ~ 1900mV / 50mV */
+				if (min_uV <= 1800000)
+					val = 0;
+				else if (min_uV <= 1900000)
+					val = (min_uV - 1750001) / 50000;
+				else
+					val = 3;	/* 2700mV */
+			} else {		 /* 2700mV ~ 2900mV / 50mV */
+				if (min_uV <= 2900000) {
+					val = (min_uV - 2650001) / 50000;
+					val += 3;
+				} else
+					val = -EINVAL;
+			}
+			break;
+		case PM8607_CHIP_B0:
+			if (min_uV < 2700000) {	/* 1800mV ~ 1850mV / 50mV */
+				if (min_uV <= 1800000)
+					val = 0;
+				else if (min_uV <= 1850000)
+					val = (min_uV - 1750001) / 50000;
+				else
+					val = 2;	/* 2700mV */
+			} else {		 /* 2700mV ~ 2900mV / 50mV */
+				if (min_uV <= 2900000) {
+					val = (min_uV - 2650001) / 50000;
+					val += 2;
+				} else if (min_uV <= 3300000)
+					val = 7;
+				else
+					val = -EINVAL;
+			}
+			break;
+		}
+		break;
+	}
+	if (val >= 0) {
+		ret = pm8607_list_voltage(rdev, val);
+		if (ret > max_uV) {
+			pr_err("exceed voltage range (%d %d) uV",
+				min_uV, max_uV);
+			return -EINVAL;
+		}
+	} else
+		pr_err("invalid voltage range (%d %d) uV", min_uV, max_uV);
+	return val;
+}
+
+static int pm8607_set_voltage(struct regulator_dev *rdev,
+			      int min_uV, int max_uV)
+{
+	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
+	struct pm8607_chip *chip = info->chip;
+	uint8_t val, mask;
+	int ret;
+
+	if (check_range(info, min_uV, max_uV)) {
+		pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
+		return -EINVAL;
+	}
+
+	ret = choose_voltage(rdev, min_uV, max_uV);
+	if (ret < 0)
+		return -EINVAL;
+	val = (uint8_t)(ret << info->vol_shift);
+	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
+
+	ret = pm8607_set_bits(chip, info->vol_reg, mask, val);
+	if (ret)
+		return ret;
+	switch (info->desc.id) {
+	case PM8607_ID_BUCK1:
+	case PM8607_ID_BUCK3:
+		ret = pm8607_set_bits(chip, info->update_reg,
+				      1 << info->update_bit,
+				      1 << info->update_bit);
+		break;
+	}
+	return ret;
+}
+
+static int pm8607_get_voltage(struct regulator_dev *rdev)
+{
+	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
+	struct pm8607_chip *chip = info->chip;
+	uint8_t val, mask;
+	int ret;
+
+	ret = pm8607_reg_read(chip, info->vol_reg);
+	if (ret < 0)
+		return ret;
+
+	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
+	val = ((unsigned char)ret & mask) >> info->vol_shift;
+
+	return pm8607_list_voltage(rdev, val);
+}
+
+static int pm8607_enable(struct regulator_dev *rdev)
+{
+	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
+	struct pm8607_chip *chip = info->chip;
+
+	return pm8607_set_bits(chip, info->enable_reg,
+			       1 << info->enable_bit,
+			       1 << info->enable_bit);
+}
+
+static int pm8607_disable(struct regulator_dev *rdev)
+{
+	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
+	struct pm8607_chip *chip = info->chip;
+
+	return pm8607_set_bits(chip, info->enable_reg,
+			       1 << info->enable_bit, 0);
+}
+
+static int pm8607_is_enabled(struct regulator_dev *rdev)
+{
+	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
+	struct pm8607_chip *chip = info->chip;
+	int ret;
+
+	ret = pm8607_reg_read(chip, info->enable_reg);
+	if (ret < 0)
+		return ret;
+
+	return !!((unsigned char)ret & (1 << info->enable_bit));
+}
+
+static struct regulator_ops pm8607_regulator_ops = {
+	.set_voltage	= pm8607_set_voltage,
+	.get_voltage	= pm8607_get_voltage,
+	.enable		= pm8607_enable,
+	.disable	= pm8607_disable,
+	.is_enabled	= pm8607_is_enabled,
+};
+
+#define PM8607_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
+{									\
+	.desc	= {							\
+		.name	= "BUCK" #_id,					\
+		.ops	= &pm8607_regulator_ops,			\
+		.type	= REGULATOR_VOLTAGE,				\
+		.id	= PM8607_ID_BUCK##_id,				\
+		.owner	= THIS_MODULE,					\
+	},								\
+	.min_uV		= (min) * 1000,					\
+	.max_uV		= (max) * 1000,					\
+	.step_uV	= (step) * 1000,				\
+	.vol_reg	= PM8607_##vreg,				\
+	.vol_shift	= (0),						\
+	.vol_nbits	= (nbits),					\
+	.update_reg	= PM8607_##ureg,				\
+	.update_bit	= (ubit),					\
+	.enable_reg	= PM8607_##ereg,				\
+	.enable_bit	= (ebit),					\
+	.slope_double	= (0),						\
+}
+
+#define PM8607_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit)	\
+{									\
+	.desc	= {							\
+		.name	= "LDO" #_id,					\
+		.ops	= &pm8607_regulator_ops,			\
+		.type	= REGULATOR_VOLTAGE,				\
+		.id	= PM8607_ID_LDO##_id,				\
+		.owner	= THIS_MODULE,					\
+	},								\
+	.min_uV		= (min) * 1000,					\
+	.max_uV		= (max) * 1000,					\
+	.step_uV	= (step) * 1000,				\
+	.vol_reg	= PM8607_##vreg,				\
+	.vol_shift	= (shift),					\
+	.vol_nbits	= (nbits),					\
+	.enable_reg	= PM8607_##ereg,				\
+	.enable_bit	= (ebit),					\
+	.slope_double	= (0),						\
+}
+
+static struct pm8607_regulator_info pm8607_regulator_info[] = {
+	PM8607_DVC(1, 0, 1500, 25, BUCK1, 6, GO, 0, SUPPLIES_EN11, 0),
+	PM8607_DVC(3, 0, 1500, 25, BUCK3, 6, GO, 2, SUPPLIES_EN11, 2),
+
+	PM8607_LDO(1 , 1200, 2800, 0, LDO1 , 0, 2, SUPPLIES_EN11, 3),
+	PM8607_LDO(2 , 1800, 3300, 0, LDO2 , 0, 3, SUPPLIES_EN11, 4),
+	PM8607_LDO(3 , 1800, 3300, 0, LDO3 , 0, 3, SUPPLIES_EN11, 5),
+	PM8607_LDO(4 , 1800, 3300, 0, LDO4 , 0, 3, SUPPLIES_EN11, 6),
+	PM8607_LDO(5 , 2900, 3300, 0, LDO5 , 0, 2, SUPPLIES_EN11, 7),
+	PM8607_LDO(6 , 1800, 3300, 0, LDO6 , 0, 3, SUPPLIES_EN12, 0),
+	PM8607_LDO(7 , 1800, 2900, 0, LDO7 , 0, 3, SUPPLIES_EN12, 1),
+	PM8607_LDO(8 , 1800, 2900, 0, LDO8 , 0, 3, SUPPLIES_EN12, 2),
+	PM8607_LDO(9 , 1800, 3300, 0, LDO9 , 0, 3, SUPPLIES_EN12, 3),
+	PM8607_LDO(10, 1200, 3300, 0, LDO10, 0, 4, SUPPLIES_EN11, 4),
+	PM8607_LDO(12, 1200, 3300, 0, LDO12, 0, 4, SUPPLIES_EN11, 5),
+	PM8607_LDO(14, 1800, 3300, 0, LDO14, 0, 3, SUPPLIES_EN11, 6),
+};
+
+static inline struct pm8607_regulator_info *find_regulator_info(int id)
+{
+	struct pm8607_regulator_info *info;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) {
+		info = &pm8607_regulator_info[i];
+		if (info->desc.id == id)
+			return info;
+	}
+	return NULL;
+}
+
+static int __devinit pm8607_regulator_probe(struct platform_device *pdev)
+{
+	struct pm8607_chip *chip = dev_get_drvdata(pdev->dev.parent);
+	struct pm8607_platform_data *pdata = chip->dev->platform_data;
+	struct pm8607_regulator_info *info = NULL;
+
+	info = find_regulator_info(pdev->id);
+	if (info == NULL) {
+		dev_err(&pdev->dev, "invalid regulator ID specified\n");
+		return -EINVAL;
+	}
+
+	info->chip = chip;
+
+	info->regulator = regulator_register(&info->desc, &pdev->dev,
+					     pdata->regulator[pdev->id], info);
+	if (IS_ERR(info->regulator)) {
+		dev_err(&pdev->dev, "failed to register regulator %s\n",
+			info->desc.name);
+		return PTR_ERR(info->regulator);
+	}
+
+	/* check DVC ramp slope double */
+	if (info->desc.id == PM8607_ID_BUCK3)
+		if (info->chip->buck3_double)
+			info->slope_double = 1;
+
+	platform_set_drvdata(pdev, info);
+	return 0;
+}
+
+static int __devexit pm8607_regulator_remove(struct platform_device *pdev)
+{
+	struct pm8607_regulator_info *info = platform_get_drvdata(pdev);
+
+	regulator_unregister(info->regulator);
+	return 0;
+}
+
+#define PM8607_REGULATOR_DRIVER(_name)				\
+{								\
+	.driver		= {					\
+		.name	= "88pm8607-" #_name,			\
+		.owner	= THIS_MODULE,				\
+	},							\
+	.probe		= pm8607_regulator_probe,		\
+	.remove		= __devexit_p(pm8607_regulator_remove),	\
+}
+
+static struct platform_driver pm8607_regulator_driver[] = {
+	PM8607_REGULATOR_DRIVER(buck1),
+	PM8607_REGULATOR_DRIVER(buck2),
+	PM8607_REGULATOR_DRIVER(buck3),
+	PM8607_REGULATOR_DRIVER(ldo1),
+	PM8607_REGULATOR_DRIVER(ldo2),
+	PM8607_REGULATOR_DRIVER(ldo3),
+	PM8607_REGULATOR_DRIVER(ldo4),
+	PM8607_REGULATOR_DRIVER(ldo5),
+	PM8607_REGULATOR_DRIVER(ldo6),
+	PM8607_REGULATOR_DRIVER(ldo7),
+	PM8607_REGULATOR_DRIVER(ldo8),
+	PM8607_REGULATOR_DRIVER(ldo9),
+	PM8607_REGULATOR_DRIVER(ldo10),
+	PM8607_REGULATOR_DRIVER(ldo12),
+	PM8607_REGULATOR_DRIVER(ldo14),
+};
+
+static int __init pm8607_regulator_init(void)
+{
+	int i, count, ret;
+
+	count = ARRAY_SIZE(pm8607_regulator_driver);
+	for (i = 0; i < count; i++) {
+		ret = platform_driver_register(&pm8607_regulator_driver[i]);
+		if (ret != 0)
+			pr_err("Failed to register regulator driver: %d\n",
+				ret);
+	}
+	return 0;
+}
+subsys_initcall(pm8607_regulator_init);
+
+static void __exit pm8607_regulator_exit(void)
+{
+	int i, count;
+
+	count = ARRAY_SIZE(pm8607_regulator_driver);
+	for (i = 0; i < count; i++)
+		platform_driver_unregister(&pm8607_regulator_driver[i]);
+}
+module_exit(pm8607_regulator_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
+MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC");
+MODULE_ALIAS("platform:88pm8607-regulator");

drivers/regulator/Kconfig

@@ -69,6 +69,13 @@ config REGULATOR_MAX1586
 	  regulator via I2C bus. The provided regulator is suitable
 	  for PXA27x chips to control VCC_CORE and VCC_USIM voltages.
 
+config REGULATOR_MAX8660
+	tristate "Maxim 8660/8661 voltage regulator"
+	depends on I2C
+	help
+	  This driver controls a Maxim 8660/8661 voltage output
+	  regulator via I2C bus.
+
 config REGULATOR_TWL4030
 	bool "TI TWL4030/TWL5030/TWL6030/TPS695x0 PMIC"
 	depends on TWL4030_CORE
@@ -157,5 +164,11 @@ config REGULATOR_TPS6507X
 	  three step-down converters and two general-purpose LDO voltage regulators.
 	  It supports TI's software based Class-2 SmartReflex implementation.
 
+config REGULATOR_88PM8607
+	bool "Marvell 88PM8607 Power regulators"
+	depends on MFD_88PM8607=y
+	help
+	  This driver supports 88PM8607 voltage regulator chips.
+
 endif
 

drivers/regulator/Makefile

@@ -12,6 +12,7 @@ obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o
 obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o
 obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o
 obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o
+obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o
 obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o
 obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o
 obj-$(CONFIG_REGULATOR_WM831X) += wm831x-ldo.o
@@ -20,10 +21,11 @@ obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
 obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o
 obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
 obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
-obj-$(CONFIG_REGULATOR_MC13783) += mc13783.o
+obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o
 obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o
 
 obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o
+obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o
 
 ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG

drivers/regulator/ab3100.c

@@ -81,7 +81,7 @@ static const u8 ab3100_reg_init_order[AB3100_NUM_REGULATORS+2] = {
 #define LDO_C_VOLTAGE 2650000
 #define LDO_D_VOLTAGE 2650000
 
-static const int const ldo_e_buck_typ_voltages[] = {
+static const int ldo_e_buck_typ_voltages[] = {
 	1800000,
 	1400000,
 	1300000,
@@ -91,7 +91,7 @@ static const int const ldo_e_buck_typ_voltages[] = {
 	900000,
 };
 
-static const int const ldo_f_typ_voltages[] = {
+static const int ldo_f_typ_voltages[] = {
 	1800000,
 	1400000,
 	1300000,
@@ -102,21 +102,21 @@ static const int const ldo_f_typ_voltages[] = {
 	2650000,
 };
 
-static const int const ldo_g_typ_voltages[] = {
+static const int ldo_g_typ_voltages[] = {
 	2850000,
 	2750000,
 	1800000,
 	1500000,
 };
 
-static const int const ldo_h_typ_voltages[] = {
+static const int ldo_h_typ_voltages[] = {
 	2750000,
 	1800000,
 	1500000,
 	1200000,
 };
 
-static const int const ldo_k_typ_voltages[] = {
+static const int ldo_k_typ_voltages[] = {
 	2750000,
 	1800000,
 };
@@ -241,24 +241,12 @@ static int ab3100_disable_regulator(struct regulator_dev *reg)
 	 * 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) {
-		int i;
-
 		dev_info(&reg->dev, "disabling LDO D - shut down system\n");
-		/*
-		 * Set regulators to default values, ignore any errors,
-		 * we're going DOWN
-		 */
-		for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) {
-			(void) ab3100_set_register_interruptible(abreg->ab3100,
-					ab3100_reg_init_order[i],
-					abreg->plfdata->reg_initvals[i]);
-		}
-
 		/* Setting LDO D to 0x00 cuts the power to the SoC */
 		return ab3100_set_register_interruptible(abreg->ab3100,
 							 AB3100_LDO_D, 0x00U);
-
 	}
 
 	/*
@@ -607,13 +595,6 @@ static int __init ab3100_regulators_probe(struct platform_device *pdev)
 		}
 	}
 
-	if (err) {
-		dev_err(&pdev->dev,
-			"LDO D regulator initialization failed with error %d\n",
-			err);
-		return err;
-	}
-
 	/* Register the regulators */
 	for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
 		struct ab3100_regulator *reg = &ab3100_regulators[i];
@@ -688,7 +669,7 @@ static __init int ab3100_regulators_init(void)
 
 static __exit void ab3100_regulators_exit(void)
 {
-	platform_driver_register(&ab3100_regulators_driver);
+	platform_driver_unregister(&ab3100_regulators_driver);
 }
 
 subsys_initcall(ab3100_regulators_init);

drivers/regulator/core.c

@@ -66,6 +66,16 @@ static unsigned int _regulator_get_mode(struct regulator_dev *rdev);
 static void _notifier_call_chain(struct regulator_dev *rdev,
 				  unsigned long event, void *data);
 
+static const char *rdev_get_name(struct regulator_dev *rdev)
+{
+	if (rdev->constraints && rdev->constraints->name)
+		return rdev->constraints->name;
+	else if (rdev->desc->name)
+		return rdev->desc->name;
+	else
+		return "";
+}
+
 /* gets the regulator for a given consumer device */
 static struct regulator *get_device_regulator(struct device *dev)
 {
@@ -96,12 +106,12 @@ static int regulator_check_voltage(struct regulator_dev *rdev,
 
 	if (!rdev->constraints) {
 		printk(KERN_ERR "%s: no constraints for %s\n", __func__,
-		       rdev->desc->name);
+		       rdev_get_name(rdev));
 		return -ENODEV;
 	}
 	if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) {
 		printk(KERN_ERR "%s: operation not allowed for %s\n",
-		       __func__, rdev->desc->name);
+		       __func__, rdev_get_name(rdev));
 		return -EPERM;
 	}
 
@@ -124,12 +134,12 @@ static int regulator_check_current_limit(struct regulator_dev *rdev,
 
 	if (!rdev->constraints) {
 		printk(KERN_ERR "%s: no constraints for %s\n", __func__,
-		       rdev->desc->name);
+		       rdev_get_name(rdev));
 		return -ENODEV;
 	}
 	if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_CURRENT)) {
 		printk(KERN_ERR "%s: operation not allowed for %s\n",
-		       __func__, rdev->desc->name);
+		       __func__, rdev_get_name(rdev));
 		return -EPERM;
 	}
 
@@ -159,17 +169,17 @@ static int regulator_check_mode(struct regulator_dev *rdev, int mode)
 
 	if (!rdev->constraints) {
 		printk(KERN_ERR "%s: no constraints for %s\n", __func__,
-		       rdev->desc->name);
+		       rdev_get_name(rdev));
 		return -ENODEV;
 	}
 	if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_MODE)) {
 		printk(KERN_ERR "%s: operation not allowed for %s\n",
-		       __func__, rdev->desc->name);
+		       __func__, rdev_get_name(rdev));
 		return -EPERM;
 	}
 	if (!(rdev->constraints->valid_modes_mask & mode)) {
 		printk(KERN_ERR "%s: invalid mode %x for %s\n",
-		       __func__, mode, rdev->desc->name);
+		       __func__, mode, rdev_get_name(rdev));
 		return -EINVAL;
 	}
 	return 0;
@@ -180,12 +190,12 @@ static int regulator_check_drms(struct regulator_dev *rdev)
 {
 	if (!rdev->constraints) {
 		printk(KERN_ERR "%s: no constraints for %s\n", __func__,
-		       rdev->desc->name);
+		       rdev_get_name(rdev));
 		return -ENODEV;
 	}
 	if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) {
 		printk(KERN_ERR "%s: operation not allowed for %s\n",
-		       __func__, rdev->desc->name);
+		       __func__, rdev_get_name(rdev));
 		return -EPERM;
 	}
 	return 0;
@@ -230,16 +240,8 @@ static ssize_t regulator_name_show(struct device *dev,
 			     struct device_attribute *attr, char *buf)
 {
 	struct regulator_dev *rdev = dev_get_drvdata(dev);
-	const char *name;
 
-	if (rdev->constraints && rdev->constraints->name)
-		name = rdev->constraints->name;
-	else if (rdev->desc->name)
-		name = rdev->desc->name;
-	else
-		name = "";
-
-	return sprintf(buf, "%s\n", name);
+	return sprintf(buf, "%s\n", rdev_get_name(rdev));
 }
 
 static ssize_t regulator_print_opmode(char *buf, int mode)
@@ -388,7 +390,7 @@ static ssize_t regulator_total_uA_show(struct device *dev,
 
 	mutex_lock(&rdev->mutex);
 	list_for_each_entry(regulator, &rdev->consumer_list, list)
-	    uA += regulator->uA_load;
+		uA += regulator->uA_load;
 	mutex_unlock(&rdev->mutex);
 	return sprintf(buf, "%d\n", uA);
 }
@@ -563,7 +565,7 @@ static void drms_uA_update(struct regulator_dev *rdev)
 
 	/* calc total requested load */
 	list_for_each_entry(sibling, &rdev->consumer_list, list)
-	    current_uA += sibling->uA_load;
+		current_uA += sibling->uA_load;
 
 	/* now get the optimum mode for our new total regulator load */
 	mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV,
@@ -579,10 +581,29 @@ static int suspend_set_state(struct regulator_dev *rdev,
 	struct regulator_state *rstate)
 {
 	int ret = 0;
+	bool can_set_state;
 
-	/* enable & disable are mandatory for suspend control */
-	if (!rdev->desc->ops->set_suspend_enable ||
-		!rdev->desc->ops->set_suspend_disable) {
+	can_set_state = rdev->desc->ops->set_suspend_enable &&
+		rdev->desc->ops->set_suspend_disable;
+
+	/* If we have no suspend mode configration don't set anything;
+	 * only warn if the driver actually makes the suspend mode
+	 * configurable.
+	 */
+	if (!rstate->enabled && !rstate->disabled) {
+		if (can_set_state)
+			printk(KERN_WARNING "%s: No configuration for %s\n",
+			       __func__, rdev_get_name(rdev));
+		return 0;
+	}
+
+	if (rstate->enabled && rstate->disabled) {
+		printk(KERN_ERR "%s: invalid configuration for %s\n",
+		       __func__, rdev_get_name(rdev));
+		return -EINVAL;
+	}
+
+	if (!can_set_state) {
 		printk(KERN_ERR "%s: no way to set suspend state\n",
 			__func__);
 		return -EINVAL;
@@ -641,25 +662,43 @@ static void print_constraints(struct regulator_dev *rdev)
 {
 	struct regulation_constraints *constraints = rdev->constraints;
 	char buf[80];
-	int count;
+	int count = 0;
+	int ret;
 
-	if (rdev->desc->type == REGULATOR_VOLTAGE) {
+	if (constraints->min_uV && constraints->max_uV) {
 		if (constraints->min_uV == constraints->max_uV)
-			count = sprintf(buf, "%d mV ",
-					constraints->min_uV / 1000);
+			count += sprintf(buf + count, "%d mV ",
+					 constraints->min_uV / 1000);
 		else
-			count = sprintf(buf, "%d <--> %d mV ",
-					constraints->min_uV / 1000,
-					constraints->max_uV / 1000);
-	} else {
+			count += sprintf(buf + count, "%d <--> %d mV ",
+					 constraints->min_uV / 1000,
+					 constraints->max_uV / 1000);
+	}
+
+	if (!constraints->min_uV ||
+	    constraints->min_uV != constraints->max_uV) {
+		ret = _regulator_get_voltage(rdev);
+		if (ret > 0)
+			count += sprintf(buf + count, "at %d mV ", ret / 1000);
+	}
+
+	if (constraints->min_uA && constraints->max_uA) {
 		if (constraints->min_uA == constraints->max_uA)
-			count = sprintf(buf, "%d mA ",
-					constraints->min_uA / 1000);
+			count += sprintf(buf + count, "%d mA ",
+					 constraints->min_uA / 1000);
 		else
-			count = sprintf(buf, "%d <--> %d mA ",
-					constraints->min_uA / 1000,
-					constraints->max_uA / 1000);
+			count += sprintf(buf + count, "%d <--> %d mA ",
+					 constraints->min_uA / 1000,
+					 constraints->max_uA / 1000);
 	}
+
+	if (!constraints->min_uA ||
+	    constraints->min_uA != constraints->max_uA) {
+		ret = _regulator_get_current_limit(rdev);
+		if (ret > 0)
+			count += sprintf(buf + count, "at %d uA ", ret / 1000);
+	}
+
 	if (constraints->valid_modes_mask & REGULATOR_MODE_FAST)
 		count += sprintf(buf + count, "fast ");
 	if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL)
@@ -669,33 +708,30 @@ static void print_constraints(struct regulator_dev *rdev)
 	if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY)
 		count += sprintf(buf + count, "standby");
 
-	printk(KERN_INFO "regulator: %s: %s\n", rdev->desc->name, buf);
+	printk(KERN_INFO "regulator: %s: %s\n", rdev_get_name(rdev), buf);
 }
 
-/**
- * set_machine_constraints - sets regulator constraints
- * @rdev: regulator source
- * @constraints: constraints to apply
- *
- * Allows platform initialisation code to define and constrain
- * regulator circuits e.g. valid voltage/current ranges, etc.  NOTE:
- * Constraints *must* be set by platform code in order for some
- * regulator operations to proceed i.e. set_voltage, set_current_limit,
- * set_mode.
- */
-static int set_machine_constraints(struct regulator_dev *rdev,
+static int machine_constraints_voltage(struct regulator_dev *rdev,
 	struct regulation_constraints *constraints)
 {
-	int ret = 0;
-	const char *name;
 	struct regulator_ops *ops = rdev->desc->ops;
+	const char *name = rdev_get_name(rdev);
+	int ret;
 
-	if (constraints->name)
-		name = constraints->name;
-	else if (rdev->desc->name)
-		name = rdev->desc->name;
-	else
-		name = "regulator";
+	/* do we need to apply the constraint voltage */
+	if (rdev->constraints->apply_uV &&
+		rdev->constraints->min_uV == rdev->constraints->max_uV &&
+		ops->set_voltage) {
+		ret = ops->set_voltage(rdev,
+			rdev->constraints->min_uV, rdev->constraints->max_uV);
+			if (ret < 0) {
+				printk(KERN_ERR "%s: failed to apply %duV constraint to %s\n",
+				       __func__,
+				       rdev->constraints->min_uV, name);
+				rdev->constraints = NULL;
+				return ret;
+			}
+	}
 
 	/* constrain machine-level voltage specs to fit
 	 * the actual range supported by this regulator.
@@ -719,14 +755,13 @@ static int set_machine_constraints(struct regulator_dev *rdev,
 
 		/* voltage constraints are optional */
 		if ((cmin == 0) && (cmax == 0))
-			goto out;
+			return 0;
 
 		/* else require explicit machine-level constraints */
 		if (cmin <= 0 || cmax <= 0 || cmax < cmin) {
 			pr_err("%s: %s '%s' voltage constraints\n",
 				       __func__, "invalid", name);
-			ret = -EINVAL;
-			goto out;
+			return -EINVAL;
 		}
 
 		/* initial: [cmin..cmax] valid, [min_uV..max_uV] not */
@@ -748,8 +783,7 @@ static int set_machine_constraints(struct regulator_dev *rdev,
 		if (max_uV < min_uV) {
 			pr_err("%s: %s '%s' voltage constraints\n",
 				       __func__, "unsupportable", name);
-			ret = -EINVAL;
-			goto out;
+			return -EINVAL;
 		}
 
 		/* use regulator's subset of machine constraints */
@@ -767,22 +801,34 @@ static int set_machine_constraints(struct regulator_dev *rdev,
 		}
 	}
 
+	return 0;
+}
+
+/**
+ * set_machine_constraints - sets regulator constraints
+ * @rdev: regulator source
+ * @constraints: constraints to apply
+ *
+ * Allows platform initialisation code to define and constrain
+ * regulator circuits e.g. valid voltage/current ranges, etc.  NOTE:
+ * Constraints *must* be set by platform code in order for some
+ * regulator operations to proceed i.e. set_voltage, set_current_limit,
+ * set_mode.
+ */
+static int set_machine_constraints(struct regulator_dev *rdev,
+	struct regulation_constraints *constraints)
+{
+	int ret = 0;
+	const char *name;
+	struct regulator_ops *ops = rdev->desc->ops;
+
 	rdev->constraints = constraints;
 
-	/* do we need to apply the constraint voltage */
-	if (rdev->constraints->apply_uV &&
-		rdev->constraints->min_uV == rdev->constraints->max_uV &&
-		ops->set_voltage) {
-		ret = ops->set_voltage(rdev,
-			rdev->constraints->min_uV, rdev->constraints->max_uV);
-			if (ret < 0) {
-				printk(KERN_ERR "%s: failed to apply %duV constraint to %s\n",
-				       __func__,
-				       rdev->constraints->min_uV, name);
-				rdev->constraints = NULL;
-				goto out;
-			}
-	}
+	name = rdev_get_name(rdev);
+
+	ret = machine_constraints_voltage(rdev, constraints);
+	if (ret != 0)
+		goto out;
 
 	/* do we need to setup our suspend state */
 	if (constraints->initial_state) {
@@ -903,7 +949,7 @@ static int set_consumer_device_supply(struct regulator_dev *rdev,
 				dev_name(&node->regulator->dev),
 				node->regulator->desc->name,
 				supply,
-				dev_name(&rdev->dev), rdev->desc->name);
+				dev_name(&rdev->dev), rdev_get_name(rdev));
 		return -EBUSY;
 	}
 
@@ -1212,7 +1258,7 @@ static int _regulator_enable(struct regulator_dev *rdev)
 		ret = _regulator_enable(rdev->supply);
 		if (ret < 0) {
 			printk(KERN_ERR "%s: failed to enable %s: %d\n",
-			       __func__, rdev->desc->name, ret);
+			       __func__, rdev_get_name(rdev), ret);
 			return ret;
 		}
 	}
@@ -1238,7 +1284,7 @@ static int _regulator_enable(struct regulator_dev *rdev)
 			}
 		} else if (ret < 0) {
 			printk(KERN_ERR "%s: is_enabled() failed for %s: %d\n",
-			       __func__, rdev->desc->name, ret);
+			       __func__, rdev_get_name(rdev), ret);
 			return ret;
 		}
 		/* Fallthrough on positive return values - already enabled */
@@ -1279,7 +1325,7 @@ static int _regulator_disable(struct regulator_dev *rdev)
 
 	if (WARN(rdev->use_count <= 0,
 			"unbalanced disables for %s\n",
-			rdev->desc->name))
+			rdev_get_name(rdev)))
 		return -EIO;
 
 	/* are we the last user and permitted to disable ? */
@@ -1292,7 +1338,7 @@ static int _regulator_disable(struct regulator_dev *rdev)
 			ret = rdev->desc->ops->disable(rdev);
 			if (ret < 0) {
 				printk(KERN_ERR "%s: failed to disable %s\n",
-				       __func__, rdev->desc->name);
+				       __func__, rdev_get_name(rdev));
 				return ret;
 			}
 		}
@@ -1349,7 +1395,7 @@ static int _regulator_force_disable(struct regulator_dev *rdev)
 		ret = rdev->desc->ops->disable(rdev);
 		if (ret < 0) {
 			printk(KERN_ERR "%s: failed to force disable %s\n",
-			       __func__, rdev->desc->name);
+			       __func__, rdev_get_name(rdev));
 			return ret;
 		}
 		/* notify other consumers that power has been forced off */
@@ -1766,7 +1812,7 @@ int regulator_set_optimum_mode(struct regulator *regulator, int uA_load)
 	output_uV = rdev->desc->ops->get_voltage(rdev);
 	if (output_uV <= 0) {
 		printk(KERN_ERR "%s: invalid output voltage found for %s\n",
-			__func__, rdev->desc->name);
+			__func__, rdev_get_name(rdev));
 		goto out;
 	}
 
@@ -1777,13 +1823,13 @@ int regulator_set_optimum_mode(struct regulator *regulator, int uA_load)
 		input_uV = rdev->constraints->input_uV;
 	if (input_uV <= 0) {
 		printk(KERN_ERR "%s: invalid input voltage found for %s\n",
-			__func__, rdev->desc->name);
+			__func__, rdev_get_name(rdev));
 		goto out;
 	}
 
 	/* calc total requested load for this regulator */
 	list_for_each_entry(consumer, &rdev->consumer_list, list)
-	    total_uA_load += consumer->uA_load;
+		total_uA_load += consumer->uA_load;
 
 	mode = rdev->desc->ops->get_optimum_mode(rdev,
 						 input_uV, output_uV,
@@ -1791,7 +1837,7 @@ int regulator_set_optimum_mode(struct regulator *regulator, int uA_load)
 	ret = regulator_check_mode(rdev, mode);
 	if (ret < 0) {
 		printk(KERN_ERR "%s: failed to get optimum mode for %s @"
-			" %d uA %d -> %d uV\n", __func__, rdev->desc->name,
+			" %d uA %d -> %d uV\n", __func__, rdev_get_name(rdev),
 			total_uA_load, input_uV, output_uV);
 		goto out;
 	}
@@ -1799,7 +1845,7 @@ int regulator_set_optimum_mode(struct regulator *regulator, int uA_load)
 	ret = rdev->desc->ops->set_mode(rdev, mode);
 	if (ret < 0) {
 		printk(KERN_ERR "%s: failed to set optimum mode %x for %s\n",
-			__func__, mode, rdev->desc->name);
+			__func__, mode, rdev_get_name(rdev));
 		goto out;
 	}
 	ret = mode;
@@ -1852,9 +1898,9 @@ static void _notifier_call_chain(struct regulator_dev *rdev,
 
 	/* now notify regulator we supply */
 	list_for_each_entry(_rdev, &rdev->supply_list, slist) {
-	  mutex_lock(&_rdev->mutex);
-	  _notifier_call_chain(_rdev, event, data);
-	  mutex_unlock(&_rdev->mutex);
+		mutex_lock(&_rdev->mutex);
+		_notifier_call_chain(_rdev, event, data);
+		mutex_unlock(&_rdev->mutex);
 	}
 }
 
@@ -1885,9 +1931,9 @@ int regulator_bulk_get(struct device *dev, int num_consumers,
 		consumers[i].consumer = regulator_get(dev,
 						      consumers[i].supply);
 		if (IS_ERR(consumers[i].consumer)) {
-			dev_err(dev, "Failed to get supply '%s'\n",
-				consumers[i].supply);
 			ret = PTR_ERR(consumers[i].consumer);
+			dev_err(dev, "Failed to get supply '%s': %d\n",
+				consumers[i].supply, ret);
 			consumers[i].consumer = NULL;
 			goto err;
 		}
@@ -1930,8 +1976,8 @@ int regulator_bulk_enable(int num_consumers,
 	return 0;
 
 err:
-	printk(KERN_ERR "Failed to enable %s\n", consumers[i].supply);
-	for (i = 0; i < num_consumers; i++)
+	printk(KERN_ERR "Failed to enable %s: %d\n", consumers[i].supply, ret);
+	for (--i; i >= 0; --i)
 		regulator_disable(consumers[i].consumer);
 
 	return ret;
@@ -1965,8 +2011,9 @@ int regulator_bulk_disable(int num_consumers,
 	return 0;
 
 err:
-	printk(KERN_ERR "Failed to disable %s\n", consumers[i].supply);
-	for (i = 0; i < num_consumers; i++)
+	printk(KERN_ERR "Failed to disable %s: %d\n", consumers[i].supply,
+	       ret);
+	for (--i; i >= 0; --i)
 		regulator_enable(consumers[i].consumer);
 
 	return ret;
@@ -2316,7 +2363,7 @@ int regulator_suspend_prepare(suspend_state_t state)
 
 		if (ret < 0) {
 			printk(KERN_ERR "%s: failed to prepare %s\n",
-				__func__, rdev->desc->name);
+				__func__, rdev_get_name(rdev));
 			goto out;
 		}
 	}
@@ -2429,12 +2476,7 @@ static int __init regulator_init_complete(void)
 		ops = rdev->desc->ops;
 		c = rdev->constraints;
 
-		if (c && c->name)
-			name = c->name;
-		else if (rdev->desc->name)
-			name = rdev->desc->name;
-		else
-			name = "regulator";
+		name = rdev_get_name(rdev);
 
 		if (!ops->disable || (c && c->always_on))
 			continue;

drivers/regulator/da903x.c

@@ -331,7 +331,7 @@ static int da9034_get_ldo12_voltage(struct regulator_dev *rdev)
 static int da9034_list_ldo12_voltage(struct regulator_dev *rdev,
 				     unsigned selector)
 {
-	if (selector > ARRAY_SIZE(da9034_ldo12_data))
+	if (selector >= ARRAY_SIZE(da9034_ldo12_data))
 		return -EINVAL;
 	return da9034_ldo12_data[selector] * 1000;
 }

drivers/regulator/lp3971.c

@@ -446,8 +446,8 @@ static int setup_regulators(struct lp3971 *lp3971,
 		lp3971->rdev[i] = regulator_register(&regulators[id],
 			lp3971->dev, pdata->regulators[i].initdata, lp3971);
 
-		err = IS_ERR(lp3971->rdev[i]);
-		if (err) {
+		if (IS_ERR(lp3971->rdev[i])) {
+			err = PTR_ERR(lp3971->rdev[i]);
 			dev_err(lp3971->dev, "regulator init failed: %d\n",
 				err);
 			goto error;

drivers/regulator/max8660.c

@@ -0,0 +1,510 @@
+/*
+ * max8660.c  --  Voltage regulation for the Maxim 8660/8661
+ *
+ * based on max1586.c and wm8400-regulator.c
+ *
+ * Copyright (C) 2009 Wolfram Sang, Pengutronix e.K.
+ *
+ * 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 of the License.
+ *
+ * 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
+ *
+ * Some info:
+ *
+ * Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX8660-MAX8661.pdf
+ *
+ * This chip is a bit nasty because it is a write-only device. Thus, the driver
+ * uses shadow registers to keep track of its values. The main problem appears
+ * to be the initialization: When Linux boots up, we cannot know if the chip is
+ * in the default state or not, so we would have to pass such information in
+ * platform_data. As this adds a bit of complexity to the driver, this is left
+ * out for now until it is really needed.
+ *
+ * [A|S|M]DTV1 registers are currently not used, but [A|S|M]DTV2.
+ *
+ * If the driver is feature complete, it might be worth to check if one set of
+ * functions for V3-V7 is sufficient. For maximum flexibility during
+ * development, they are separated for now.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/max8660.h>
+
+#define MAX8660_DCDC_MIN_UV	 725000
+#define MAX8660_DCDC_MAX_UV	1800000
+#define MAX8660_DCDC_STEP	  25000
+#define MAX8660_DCDC_MAX_SEL	0x2b
+
+#define MAX8660_LDO5_MIN_UV	1700000
+#define MAX8660_LDO5_MAX_UV	2000000
+#define MAX8660_LDO5_STEP	  25000
+#define MAX8660_LDO5_MAX_SEL	0x0c
+
+#define MAX8660_LDO67_MIN_UV	1800000
+#define MAX8660_LDO67_MAX_UV	3300000
+#define MAX8660_LDO67_STEP	 100000
+#define MAX8660_LDO67_MAX_SEL	0x0f
+
+enum {
+	MAX8660_OVER1,
+	MAX8660_OVER2,
+	MAX8660_VCC1,
+	MAX8660_ADTV1,
+	MAX8660_ADTV2,
+	MAX8660_SDTV1,
+	MAX8660_SDTV2,
+	MAX8660_MDTV1,
+	MAX8660_MDTV2,
+	MAX8660_L12VCR,
+	MAX8660_FPWM,
+	MAX8660_N_REGS,	/* not a real register */
+};
+
+struct max8660 {
+	struct i2c_client *client;
+	u8 shadow_regs[MAX8660_N_REGS];		/* as chip is write only */
+	struct regulator_dev *rdev[];
+};
+
+static int max8660_write(struct max8660 *max8660, u8 reg, u8 mask, u8 val)
+{
+	static const u8 max8660_addresses[MAX8660_N_REGS] =
+	  { 0x10, 0x12, 0x20, 0x23, 0x24, 0x29, 0x2a, 0x32, 0x33, 0x39, 0x80 };
+
+	int ret;
+	u8 reg_val = (max8660->shadow_regs[reg] & mask) | val;
+	dev_vdbg(&max8660->client->dev, "Writing reg %02x with %02x\n",
+			max8660_addresses[reg], reg_val);
+
+	ret = i2c_smbus_write_byte_data(max8660->client,
+			max8660_addresses[reg], reg_val);
+	if (ret == 0)
+		max8660->shadow_regs[reg] = reg_val;
+
+	return ret;
+}
+
+
+/*
+ * DCDC functions
+ */
+
+static int max8660_dcdc_is_enabled(struct regulator_dev *rdev)
+{
+	struct max8660 *max8660 = rdev_get_drvdata(rdev);
+	u8 val = max8660->shadow_regs[MAX8660_OVER1];
+	u8 mask = (rdev_get_id(rdev) == MAX8660_V3) ? 1 : 4;
+	return !!(val & mask);
+}
+
+static int max8660_dcdc_enable(struct regulator_dev *rdev)
+{
+	struct max8660 *max8660 = rdev_get_drvdata(rdev);
+	u8 bit = (rdev_get_id(rdev) == MAX8660_V3) ? 1 : 4;
+	return max8660_write(max8660, MAX8660_OVER1, 0xff, bit);
+}
+
+static int max8660_dcdc_disable(struct regulator_dev *rdev)
+{
+	struct max8660 *max8660 = rdev_get_drvdata(rdev);
+	u8 mask = (rdev_get_id(rdev) == MAX8660_V3) ? ~1 : ~4;
+	return max8660_write(max8660, MAX8660_OVER1, mask, 0);
+}
+
+static int max8660_dcdc_list(struct regulator_dev *rdev, unsigned selector)
+{
+	if (selector > MAX8660_DCDC_MAX_SEL)
+		return -EINVAL;
+	return MAX8660_DCDC_MIN_UV + selector * MAX8660_DCDC_STEP;
+}
+
+static int max8660_dcdc_get(struct regulator_dev *rdev)
+{
+	struct max8660 *max8660 = rdev_get_drvdata(rdev);
+	u8 reg = (rdev_get_id(rdev) == MAX8660_V3) ? MAX8660_ADTV2 : MAX8660_SDTV2;
+	u8 selector = max8660->shadow_regs[reg];
+	return MAX8660_DCDC_MIN_UV + selector * MAX8660_DCDC_STEP;
+}
+
+static int max8660_dcdc_set(struct regulator_dev *rdev, int min_uV, int max_uV)
+{
+	struct max8660 *max8660 = rdev_get_drvdata(rdev);
+	u8 reg, selector, bits;
+	int ret;
+
+	if (min_uV < MAX8660_DCDC_MIN_UV || min_uV > MAX8660_DCDC_MAX_UV)
+		return -EINVAL;
+	if (max_uV < MAX8660_DCDC_MIN_UV || max_uV > MAX8660_DCDC_MAX_UV)
+		return -EINVAL;
+
+	selector = (min_uV - (MAX8660_DCDC_MIN_UV - MAX8660_DCDC_STEP + 1))
+			/ MAX8660_DCDC_STEP;
+
+	ret = max8660_dcdc_list(rdev, selector);
+	if (ret < 0 || ret > max_uV)
+		return -EINVAL;
+
+	reg = (rdev_get_id(rdev) == MAX8660_V3) ? MAX8660_ADTV2 : MAX8660_SDTV2;
+	ret = max8660_write(max8660, reg, 0, selector);
+	if (ret)
+		return ret;
+
+	/* Select target voltage register and activate regulation */
+	bits = (rdev_get_id(rdev) == MAX8660_V3) ? 0x03 : 0x30;
+	return max8660_write(max8660, MAX8660_VCC1, 0xff, bits);
+}
+
+static struct regulator_ops max8660_dcdc_ops = {
+	.is_enabled = max8660_dcdc_is_enabled,
+	.list_voltage = max8660_dcdc_list,
+	.set_voltage = max8660_dcdc_set,
+	.get_voltage = max8660_dcdc_get,
+};
+
+
+/*
+ * LDO5 functions
+ */
+
+static int max8660_ldo5_list(struct regulator_dev *rdev, unsigned selector)
+{
+	if (selector > MAX8660_LDO5_MAX_SEL)
+		return -EINVAL;
+	return MAX8660_LDO5_MIN_UV + selector * MAX8660_LDO5_STEP;
+}
+
+static int max8660_ldo5_get(struct regulator_dev *rdev)
+{
+	struct max8660 *max8660 = rdev_get_drvdata(rdev);
+	u8 selector = max8660->shadow_regs[MAX8660_MDTV2];
+
+	return MAX8660_LDO5_MIN_UV + selector * MAX8660_LDO5_STEP;
+}
+
+static int max8660_ldo5_set(struct regulator_dev *rdev, int min_uV, int max_uV)
+{
+	struct max8660 *max8660 = rdev_get_drvdata(rdev);
+	u8 selector;
+	int ret;
+
+	if (min_uV < MAX8660_LDO5_MIN_UV || min_uV > MAX8660_LDO5_MAX_UV)
+		return -EINVAL;
+	if (max_uV < MAX8660_LDO5_MIN_UV || max_uV > MAX8660_LDO5_MAX_UV)
+		return -EINVAL;
+
+	selector = (min_uV - (MAX8660_LDO5_MIN_UV - MAX8660_LDO5_STEP + 1))
+			/ MAX8660_LDO5_STEP;
+	ret = max8660_ldo5_list(rdev, selector);
+	if (ret < 0 || ret > max_uV)
+		return -EINVAL;
+
+	ret = max8660_write(max8660, MAX8660_MDTV2, 0, selector);
+	if (ret)
+		return ret;
+
+	/* Select target voltage register and activate regulation */
+	return max8660_write(max8660, MAX8660_VCC1, 0xff, 0xc0);
+}
+
+static struct regulator_ops max8660_ldo5_ops = {
+	.list_voltage = max8660_ldo5_list,
+	.set_voltage = max8660_ldo5_set,
+	.get_voltage = max8660_ldo5_get,
+};
+
+
+/*
+ * LDO67 functions
+ */
+
+static int max8660_ldo67_is_enabled(struct regulator_dev *rdev)
+{
+	struct max8660 *max8660 = rdev_get_drvdata(rdev);
+	u8 val = max8660->shadow_regs[MAX8660_OVER2];
+	u8 mask = (rdev_get_id(rdev) == MAX8660_V6) ? 2 : 4;
+	return !!(val & mask);
+}
+
+static int max8660_ldo67_enable(struct regulator_dev *rdev)
+{
+	struct max8660 *max8660 = rdev_get_drvdata(rdev);
+	u8 bit = (rdev_get_id(rdev) == MAX8660_V6) ? 2 : 4;
+	return max8660_write(max8660, MAX8660_OVER2, 0xff, bit);
+}
+
+static int max8660_ldo67_disable(struct regulator_dev *rdev)
+{
+	struct max8660 *max8660 = rdev_get_drvdata(rdev);
+	u8 mask = (rdev_get_id(rdev) == MAX8660_V6) ? ~2 : ~4;
+	return max8660_write(max8660, MAX8660_OVER2, mask, 0);
+}
+
+static int max8660_ldo67_list(struct regulator_dev *rdev, unsigned selector)
+{
+	if (selector > MAX8660_LDO67_MAX_SEL)
+		return -EINVAL;
+	return MAX8660_LDO67_MIN_UV + selector * MAX8660_LDO67_STEP;
+}
+
+static int max8660_ldo67_get(struct regulator_dev *rdev)
+{
+	struct max8660 *max8660 = rdev_get_drvdata(rdev);
+	u8 shift = (rdev_get_id(rdev) == MAX8660_V6) ? 0 : 4;
+	u8 selector = (max8660->shadow_regs[MAX8660_L12VCR] >> shift) & 0xf;
+
+	return MAX8660_LDO67_MIN_UV + selector * MAX8660_LDO67_STEP;
+}
+
+static int max8660_ldo67_set(struct regulator_dev *rdev, int min_uV, int max_uV)
+{
+	struct max8660 *max8660 = rdev_get_drvdata(rdev);
+	u8 selector;
+	int ret;
+
+	if (min_uV < MAX8660_LDO67_MIN_UV || min_uV > MAX8660_LDO67_MAX_UV)
+		return -EINVAL;
+	if (max_uV < MAX8660_LDO67_MIN_UV || max_uV > MAX8660_LDO67_MAX_UV)
+		return -EINVAL;
+
+	selector = (min_uV - (MAX8660_LDO67_MIN_UV - MAX8660_LDO67_STEP + 1))
+			/ MAX8660_LDO67_STEP;
+
+	ret = max8660_ldo67_list(rdev, selector);
+	if (ret < 0 || ret > max_uV)
+		return -EINVAL;
+
+	if (rdev_get_id(rdev) == MAX8660_V6)
+		return max8660_write(max8660, MAX8660_L12VCR, 0xf0, selector);
+	else
+		return max8660_write(max8660, MAX8660_L12VCR, 0x0f, selector << 4);
+}
+
+static struct regulator_ops max8660_ldo67_ops = {
+	.is_enabled = max8660_ldo67_is_enabled,
+	.enable = max8660_ldo67_enable,
+	.disable = max8660_ldo67_disable,
+	.list_voltage = max8660_ldo67_list,
+	.get_voltage = max8660_ldo67_get,
+	.set_voltage = max8660_ldo67_set,
+};
+
+static struct regulator_desc max8660_reg[] = {
+	{
+		.name = "V3(DCDC)",
+		.id = MAX8660_V3,
+		.ops = &max8660_dcdc_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = MAX8660_DCDC_MAX_SEL + 1,
+		.owner = THIS_MODULE,
+	},
+	{
+		.name = "V4(DCDC)",
+		.id = MAX8660_V4,
+		.ops = &max8660_dcdc_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = MAX8660_DCDC_MAX_SEL + 1,
+		.owner = THIS_MODULE,
+	},
+	{
+		.name = "V5(LDO)",
+		.id = MAX8660_V5,
+		.ops = &max8660_ldo5_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = MAX8660_LDO5_MAX_SEL + 1,
+		.owner = THIS_MODULE,
+	},
+	{
+		.name = "V6(LDO)",
+		.id = MAX8660_V6,
+		.ops = &max8660_ldo67_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = MAX8660_LDO67_MAX_SEL + 1,
+		.owner = THIS_MODULE,
+	},
+	{
+		.name = "V7(LDO)",
+		.id = MAX8660_V7,
+		.ops = &max8660_ldo67_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = MAX8660_LDO67_MAX_SEL + 1,
+		.owner = THIS_MODULE,
+	},
+};
+
+static int max8660_probe(struct i2c_client *client,
+			      const struct i2c_device_id *i2c_id)
+{
+	struct regulator_dev **rdev;
+	struct max8660_platform_data *pdata = client->dev.platform_data;
+	struct max8660 *max8660;
+	int boot_on, i, id, ret = -EINVAL;
+
+	if (pdata->num_subdevs > MAX8660_V_END) {
+		dev_err(&client->dev, "Too much regulators found!\n");
+		goto out;
+	}
+
+	max8660 = kzalloc(sizeof(struct max8660) +
+			sizeof(struct regulator_dev *) * MAX8660_V_END,
+			GFP_KERNEL);
+	if (!max8660) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	max8660->client = client;
+	rdev = max8660->rdev;
+
+	if (pdata->en34_is_high) {
+		/* Simulate always on */
+		max8660->shadow_regs[MAX8660_OVER1] = 5;
+	} else {
+		/* Otherwise devices can be toggled via software */
+		max8660_dcdc_ops.enable = max8660_dcdc_enable;
+		max8660_dcdc_ops.disable = max8660_dcdc_disable;
+	}
+
+	/*
+	 * First, set up shadow registers to prevent glitches. As some
+	 * registers are shared between regulators, everything must be properly
+	 * set up for all regulators in advance.
+	 */
+	max8660->shadow_regs[MAX8660_ADTV1] =
+		max8660->shadow_regs[MAX8660_ADTV2] =
+		max8660->shadow_regs[MAX8660_SDTV1] =
+		max8660->shadow_regs[MAX8660_SDTV2] = 0x1b;
+	max8660->shadow_regs[MAX8660_MDTV1] =
+		max8660->shadow_regs[MAX8660_MDTV2] = 0x04;
+
+	for (i = 0; i < pdata->num_subdevs; i++) {
+
+		if (!pdata->subdevs[i].platform_data)
+			goto err_free;
+
+		boot_on = pdata->subdevs[i].platform_data->constraints.boot_on;
+
+		switch (pdata->subdevs[i].id) {
+		case MAX8660_V3:
+			if (boot_on)
+				max8660->shadow_regs[MAX8660_OVER1] |= 1;
+			break;
+
+		case MAX8660_V4:
+			if (boot_on)
+				max8660->shadow_regs[MAX8660_OVER1] |= 4;
+			break;
+
+		case MAX8660_V5:
+			break;
+
+		case MAX8660_V6:
+			if (boot_on)
+				max8660->shadow_regs[MAX8660_OVER2] |= 2;
+			break;
+
+		case MAX8660_V7:
+			if (!strcmp(i2c_id->name, "max8661")) {
+				dev_err(&client->dev, "Regulator not on this chip!\n");
+				goto err_free;
+			}
+
+			if (boot_on)
+				max8660->shadow_regs[MAX8660_OVER2] |= 4;
+			break;
+
+		default:
+			dev_err(&client->dev, "invalid regulator %s\n",
+				 pdata->subdevs[i].name);
+			goto err_free;
+		}
+	}
+
+	/* Finally register devices */
+	for (i = 0; i < pdata->num_subdevs; i++) {
+
+		id = pdata->subdevs[i].id;
+
+		rdev[i] = regulator_register(&max8660_reg[id], &client->dev,
+					     pdata->subdevs[i].platform_data,
+					     max8660);
+		if (IS_ERR(rdev[i])) {
+			ret = PTR_ERR(rdev[i]);
+			dev_err(&client->dev, "failed to register %s\n",
+				max8660_reg[id].name);
+			goto err_unregister;
+		}
+	}
+
+	i2c_set_clientdata(client, rdev);
+	dev_info(&client->dev, "Maxim 8660/8661 regulator driver loaded\n");
+	return 0;
+
+err_unregister:
+	while (--i >= 0)
+		regulator_unregister(rdev[i]);
+err_free:
+	kfree(max8660);
+out:
+	return ret;
+}
+
+static int max8660_remove(struct i2c_client *client)
+{
+	struct regulator_dev **rdev = i2c_get_clientdata(client);
+	int i;
+
+	for (i = 0; i < MAX8660_V_END; i++)
+		if (rdev[i])
+			regulator_unregister(rdev[i]);
+	kfree(rdev);
+	i2c_set_clientdata(client, NULL);
+
+	return 0;
+}
+
+static const struct i2c_device_id max8660_id[] = {
+	{ "max8660", 0 },
+	{ "max8661", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, max8660_id);
+
+static struct i2c_driver max8660_driver = {
+	.probe = max8660_probe,
+	.remove = max8660_remove,
+	.driver		= {
+		.name	= "max8660",
+	},
+	.id_table	= max8660_id,
+};
+
+static int __init max8660_init(void)
+{
+	return i2c_add_driver(&max8660_driver);
+}
+subsys_initcall(max8660_init);
+
+static void __exit max8660_exit(void)
+{
+	i2c_del_driver(&max8660_driver);
+}
+module_exit(max8660_exit);
+
+/* Module information */
+MODULE_DESCRIPTION("MAXIM 8660/8661 voltage regulator driver");
+MODULE_AUTHOR("Wolfram Sang");
+MODULE_LICENSE("GPL v2");

drivers/regulator/mc13783-regulator.c

@@ -0,0 +1,245 @@
+/*
+ * Regulator Driver for Freescale MC13783 PMIC
+ *
+ * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
+ *
+ * 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/mfd/mc13783.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/driver.h>
+#include <linux/platform_device.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+
+#define MC13783_REG_SWITCHERS4			28
+#define MC13783_REG_SWITCHERS4_PLLEN			(1 << 18)
+
+#define MC13783_REG_SWITCHERS5			29
+#define MC13783_REG_SWITCHERS5_SW3EN			(1 << 20)
+
+#define MC13783_REG_REGULATORMODE0		32
+#define MC13783_REG_REGULATORMODE0_VAUDIOEN		(1 << 0)
+#define MC13783_REG_REGULATORMODE0_VIOHIEN		(1 << 3)
+#define MC13783_REG_REGULATORMODE0_VIOLOEN		(1 << 6)
+#define MC13783_REG_REGULATORMODE0_VDIGEN		(1 << 9)
+#define MC13783_REG_REGULATORMODE0_VGENEN		(1 << 12)
+#define MC13783_REG_REGULATORMODE0_VRFDIGEN		(1 << 15)
+#define MC13783_REG_REGULATORMODE0_VRFREFEN		(1 << 18)
+#define MC13783_REG_REGULATORMODE0_VRFCPEN		(1 << 21)
+
+#define MC13783_REG_REGULATORMODE1		33
+#define MC13783_REG_REGULATORMODE1_VSIMEN		(1 << 0)
+#define MC13783_REG_REGULATORMODE1_VESIMEN		(1 << 3)
+#define MC13783_REG_REGULATORMODE1_VCAMEN		(1 << 6)
+#define MC13783_REG_REGULATORMODE1_VRFBGEN		(1 << 9)
+#define MC13783_REG_REGULATORMODE1_VVIBEN		(1 << 11)
+#define MC13783_REG_REGULATORMODE1_VRF1EN		(1 << 12)
+#define MC13783_REG_REGULATORMODE1_VRF2EN		(1 << 15)
+#define MC13783_REG_REGULATORMODE1_VMMC1EN		(1 << 18)
+#define MC13783_REG_REGULATORMODE1_VMMC2EN		(1 << 21)
+
+#define MC13783_REG_POWERMISC			34
+#define MC13783_REG_POWERMISC_GPO1EN			(1 << 6)
+#define MC13783_REG_POWERMISC_GPO2EN			(1 << 8)
+#define MC13783_REG_POWERMISC_GPO3EN			(1 << 10)
+#define MC13783_REG_POWERMISC_GPO4EN			(1 << 12)
+
+struct mc13783_regulator {
+	struct regulator_desc desc;
+	int reg;
+	int enable_bit;
+};
+
+static struct regulator_ops mc13783_regulator_ops;
+
+#define MC13783_DEFINE(prefix, _name, _reg)				\
+	[MC13783_ ## prefix ## _ ## _name] = {				\
+		.desc = {						\
+			.name = #prefix "_" #_name,			\
+			.ops = &mc13783_regulator_ops,			\
+			.type = REGULATOR_VOLTAGE,			\
+			.id = MC13783_ ## prefix ## _ ## _name,		\
+			.owner = THIS_MODULE,				\
+		},							\
+		.reg = MC13783_REG_ ## _reg,				\
+		.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN,	\
+	}
+
+#define MC13783_DEFINE_SW(_name, _reg) MC13783_DEFINE(SW, _name, _reg)
+#define MC13783_DEFINE_REGU(_name, _reg) MC13783_DEFINE(REGU, _name, _reg)
+
+static struct mc13783_regulator mc13783_regulators[] = {
+	MC13783_DEFINE_SW(SW3, SWITCHERS5),
+	MC13783_DEFINE_SW(PLL, SWITCHERS4),
+
+	MC13783_DEFINE_REGU(VAUDIO, REGULATORMODE0),
+	MC13783_DEFINE_REGU(VIOHI, REGULATORMODE0),
+	MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0),
+	MC13783_DEFINE_REGU(VDIG, REGULATORMODE0),
+	MC13783_DEFINE_REGU(VGEN, REGULATORMODE0),
+	MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0),
+	MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0),
+	MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0),
+	MC13783_DEFINE_REGU(VSIM, REGULATORMODE1),
+	MC13783_DEFINE_REGU(VESIM, REGULATORMODE1),
+	MC13783_DEFINE_REGU(VCAM, REGULATORMODE1),
+	MC13783_DEFINE_REGU(VRFBG, REGULATORMODE1),
+	MC13783_DEFINE_REGU(VVIB, REGULATORMODE1),
+	MC13783_DEFINE_REGU(VRF1, REGULATORMODE1),
+	MC13783_DEFINE_REGU(VRF2, REGULATORMODE1),
+	MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1),
+	MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1),
+	MC13783_DEFINE_REGU(GPO1, POWERMISC),
+	MC13783_DEFINE_REGU(GPO2, POWERMISC),
+	MC13783_DEFINE_REGU(GPO3, POWERMISC),
+	MC13783_DEFINE_REGU(GPO4, POWERMISC),
+};
+
+struct mc13783_regulator_priv {
+	struct mc13783 *mc13783;
+	struct regulator_dev *regulators[];
+};
+
+static int mc13783_regulator_enable(struct regulator_dev *rdev)
+{
+	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
+	int id = rdev_get_id(rdev);
+	int ret;
+
+	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
+
+	mc13783_lock(priv->mc13783);
+	ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
+			mc13783_regulators[id].enable_bit,
+			mc13783_regulators[id].enable_bit);
+	mc13783_unlock(priv->mc13783);
+
+	return ret;
+}
+
+static int mc13783_regulator_disable(struct regulator_dev *rdev)
+{
+	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
+	int id = rdev_get_id(rdev);
+	int ret;
+
+	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
+
+	mc13783_lock(priv->mc13783);
+	ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
+			mc13783_regulators[id].enable_bit, 0);
+	mc13783_unlock(priv->mc13783);
+
+	return ret;
+}
+
+static int mc13783_regulator_is_enabled(struct regulator_dev *rdev)
+{
+	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
+	int ret, id = rdev_get_id(rdev);
+	unsigned int val;
+
+	mc13783_lock(priv->mc13783);
+	ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
+	mc13783_unlock(priv->mc13783);
+
+	if (ret)
+		return ret;
+
+	return (val & mc13783_regulators[id].enable_bit) != 0;
+}
+
+static struct regulator_ops mc13783_regulator_ops = {
+	.enable = mc13783_regulator_enable,
+	.disable = mc13783_regulator_disable,
+	.is_enabled = mc13783_regulator_is_enabled,
+};
+
+static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
+{
+	struct mc13783_regulator_priv *priv;
+	struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);
+	struct mc13783_regulator_platform_data *pdata =
+		dev_get_platdata(&pdev->dev);
+	struct mc13783_regulator_init_data *init_data;
+	int i, ret;
+
+	dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id);
+
+	priv = kzalloc(sizeof(*priv) +
+			pdata->num_regulators * sizeof(priv->regulators[0]),
+			GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->mc13783 = mc13783;
+
+	for (i = 0; i < pdata->num_regulators; i++) {
+		init_data = &pdata->regulators[i];
+		priv->regulators[i] = regulator_register(
+				&mc13783_regulators[init_data->id].desc,
+				&pdev->dev, init_data->init_data, priv);
+
+		if (IS_ERR(priv->regulators[i])) {
+			dev_err(&pdev->dev, "failed to register regulator %s\n",
+				mc13783_regulators[i].desc.name);
+			ret = PTR_ERR(priv->regulators[i]);
+			goto err;
+		}
+	}
+
+	platform_set_drvdata(pdev, priv);
+
+	return 0;
+err:
+	while (--i >= 0)
+		regulator_unregister(priv->regulators[i]);
+
+	kfree(priv);
+
+	return ret;
+}
+
+static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
+{
+	struct mc13783_regulator_priv *priv = platform_get_drvdata(pdev);
+	struct mc13783_regulator_platform_data *pdata =
+		dev_get_platdata(&pdev->dev);
+	int i;
+
+	for (i = 0; i < pdata->num_regulators; i++)
+		regulator_unregister(priv->regulators[i]);
+
+	return 0;
+}
+
+static struct platform_driver mc13783_regulator_driver = {
+	.driver	= {
+		.name	= "mc13783-regulator",
+		.owner	= THIS_MODULE,
+	},
+	.remove		= __devexit_p(mc13783_regulator_remove),
+	.probe		= mc13783_regulator_probe,
+};
+
+static int __init mc13783_regulator_init(void)
+{
+	return platform_driver_register(&mc13783_regulator_driver);
+}
+subsys_initcall(mc13783_regulator_init);
+
+static void __exit mc13783_regulator_exit(void)
+{
+	platform_driver_unregister(&mc13783_regulator_driver);
+}
+module_exit(mc13783_regulator_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
+MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
+MODULE_ALIAS("platform:mc13783-regulator");

drivers/regulator/mc13783.c

@@ -1,410 +0,0 @@
-/*
- * Regulator Driver for Freescale MC13783 PMIC
- *
- * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
- *
- * 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/mfd/mc13783-private.h>
-#include <linux/regulator/machine.h>
-#include <linux/regulator/driver.h>
-#include <linux/platform_device.h>
-#include <linux/mfd/mc13783.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/err.h>
-
-struct mc13783_regulator {
-	struct regulator_desc desc;
-	int reg;
-	int enable_bit;
-};
-
-static struct regulator_ops mc13783_regulator_ops;
-
-static struct mc13783_regulator mc13783_regulators[] = {
-	[MC13783_SW_SW3] = {
-		.desc = {
-			.name	= "SW_SW3",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_SW_SW3,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_SWITCHERS_5,
-		.enable_bit = MC13783_SWCTRL_SW3_EN,
-	},
-	[MC13783_SW_PLL] = {
-		.desc = {
-			.name	= "SW_PLL",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_SW_PLL,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_SWITCHERS_4,
-		.enable_bit = MC13783_SWCTRL_PLL_EN,
-	},
-	[MC13783_REGU_VAUDIO] = {
-		.desc = {
-			.name	= "REGU_VAUDIO",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VAUDIO,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_0,
-		.enable_bit = MC13783_REGCTRL_VAUDIO_EN,
-	},
-	[MC13783_REGU_VIOHI] = {
-		.desc = {
-			.name	= "REGU_VIOHI",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VIOHI,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_0,
-		.enable_bit = MC13783_REGCTRL_VIOHI_EN,
-	},
-	[MC13783_REGU_VIOLO] = {
-		.desc = {
-			.name	= "REGU_VIOLO",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VIOLO,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_0,
-		.enable_bit = MC13783_REGCTRL_VIOLO_EN,
-	},
-	[MC13783_REGU_VDIG] = {
-		.desc = {
-			.name	= "REGU_VDIG",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VDIG,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_0,
-		.enable_bit = MC13783_REGCTRL_VDIG_EN,
-	},
-	[MC13783_REGU_VGEN] = {
-		.desc = {
-			.name	= "REGU_VGEN",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VGEN,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_0,
-		.enable_bit = MC13783_REGCTRL_VGEN_EN,
-	},
-	[MC13783_REGU_VRFDIG] = {
-		.desc = {
-			.name	= "REGU_VRFDIG",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VRFDIG,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_0,
-		.enable_bit = MC13783_REGCTRL_VRFDIG_EN,
-	},
-	[MC13783_REGU_VRFREF] = {
-		.desc = {
-			.name	= "REGU_VRFREF",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VRFREF,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_0,
-		.enable_bit = MC13783_REGCTRL_VRFREF_EN,
-	},
-	[MC13783_REGU_VRFCP] = {
-		.desc = {
-			.name	= "REGU_VRFCP",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VRFCP,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_0,
-		.enable_bit = MC13783_REGCTRL_VRFCP_EN,
-	},
-	[MC13783_REGU_VSIM] = {
-		.desc = {
-			.name	= "REGU_VSIM",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VSIM,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_1,
-		.enable_bit = MC13783_REGCTRL_VSIM_EN,
-	},
-	[MC13783_REGU_VESIM] = {
-		.desc = {
-			.name	= "REGU_VESIM",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VESIM,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_1,
-		.enable_bit = MC13783_REGCTRL_VESIM_EN,
-	},
-	[MC13783_REGU_VCAM] = {
-		.desc = {
-			.name	= "REGU_VCAM",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VCAM,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_1,
-		.enable_bit = MC13783_REGCTRL_VCAM_EN,
-	},
-	[MC13783_REGU_VRFBG] = {
-		.desc = {
-			.name	= "REGU_VRFBG",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VRFBG,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_1,
-		.enable_bit = MC13783_REGCTRL_VRFBG_EN,
-	},
-	[MC13783_REGU_VVIB] = {
-		.desc = {
-			.name	= "REGU_VVIB",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VVIB,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_1,
-		.enable_bit = MC13783_REGCTRL_VVIB_EN,
-	},
-	[MC13783_REGU_VRF1] = {
-		.desc = {
-			.name	= "REGU_VRF1",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VRF1,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_1,
-		.enable_bit = MC13783_REGCTRL_VRF1_EN,
-	},
-	[MC13783_REGU_VRF2] = {
-		.desc = {
-			.name	= "REGU_VRF2",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VRF2,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_1,
-		.enable_bit = MC13783_REGCTRL_VRF2_EN,
-	},
-	[MC13783_REGU_VMMC1] = {
-		.desc = {
-			.name	= "REGU_VMMC1",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VMMC1,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_1,
-		.enable_bit = MC13783_REGCTRL_VMMC1_EN,
-	},
-	[MC13783_REGU_VMMC2] = {
-		.desc = {
-			.name	= "REGU_VMMC2",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_VMMC2,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_REGULATOR_MODE_1,
-		.enable_bit = MC13783_REGCTRL_VMMC2_EN,
-	},
-	[MC13783_REGU_GPO1] = {
-		.desc = {
-			.name	= "REGU_GPO1",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_GPO1,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_POWER_MISCELLANEOUS,
-		.enable_bit = MC13783_REGCTRL_GPO1_EN,
-	},
-	[MC13783_REGU_GPO2] = {
-		.desc = {
-			.name	= "REGU_GPO2",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_GPO2,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_POWER_MISCELLANEOUS,
-		.enable_bit = MC13783_REGCTRL_GPO2_EN,
-	},
-	[MC13783_REGU_GPO3] = {
-		.desc = {
-			.name	= "REGU_GPO3",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_GPO3,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_POWER_MISCELLANEOUS,
-		.enable_bit = MC13783_REGCTRL_GPO3_EN,
-	},
-	[MC13783_REGU_GPO4] = {
-		.desc = {
-			.name	= "REGU_GPO4",
-			.ops	= &mc13783_regulator_ops,
-			.type	= REGULATOR_VOLTAGE,
-			.id	= MC13783_REGU_GPO4,
-			.owner	= THIS_MODULE,
-		},
-		.reg = MC13783_REG_POWER_MISCELLANEOUS,
-		.enable_bit = MC13783_REGCTRL_GPO4_EN,
-	},
-};
-
-struct mc13783_priv {
-	struct regulator_desc desc[ARRAY_SIZE(mc13783_regulators)];
-	struct mc13783 *mc13783;
-	struct regulator_dev *regulators[0];
-};
-
-static int mc13783_enable(struct regulator_dev *rdev)
-{
-	struct mc13783_priv *priv = rdev_get_drvdata(rdev);
-	int id = rdev_get_id(rdev);
-
-	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
-
-	return mc13783_set_bits(priv->mc13783, mc13783_regulators[id].reg,
-			mc13783_regulators[id].enable_bit,
-			mc13783_regulators[id].enable_bit);
-}
-
-static int mc13783_disable(struct regulator_dev *rdev)
-{
-	struct mc13783_priv *priv = rdev_get_drvdata(rdev);
-	int id = rdev_get_id(rdev);
-
-	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
-
-	return mc13783_set_bits(priv->mc13783, mc13783_regulators[id].reg,
-			mc13783_regulators[id].enable_bit, 0);
-}
-
-static int mc13783_is_enabled(struct regulator_dev *rdev)
-{
-	struct mc13783_priv *priv = rdev_get_drvdata(rdev);
-	int ret, id = rdev_get_id(rdev);
-	unsigned int val;
-
-	ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
-	if (ret)
-		return ret;
-
-	return (val & mc13783_regulators[id].enable_bit) != 0;
-}
-
-static struct regulator_ops mc13783_regulator_ops = {
-	.enable		= mc13783_enable,
-	.disable	= mc13783_disable,
-	.is_enabled	= mc13783_is_enabled,
-};
-
-static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
-{
-	struct mc13783_priv *priv;
-	struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);
-	struct mc13783_regulator_init_data *init_data;
-	int i, ret;
-
-	dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id);
-
-	priv = kzalloc(sizeof(*priv) + mc13783->num_regulators * sizeof(void *),
-			GFP_KERNEL);
-	if (!priv)
-		return -ENOMEM;
-
-	priv->mc13783 = mc13783;
-
-	for (i = 0; i < mc13783->num_regulators; i++) {
-		init_data = &mc13783->regulators[i];
-		priv->regulators[i] = regulator_register(
-				&mc13783_regulators[init_data->id].desc,
-				&pdev->dev, init_data->init_data, priv);
-
-		if (IS_ERR(priv->regulators[i])) {
-			dev_err(&pdev->dev, "failed to register regulator %s\n",
-				mc13783_regulators[i].desc.name);
-			ret = PTR_ERR(priv->regulators[i]);
-			goto err;
-		}
-	}
-
-	platform_set_drvdata(pdev, priv);
-
-	return 0;
-err:
-	while (--i >= 0)
-		regulator_unregister(priv->regulators[i]);
-
-	kfree(priv);
-
-	return ret;
-}
-
-static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
-{
-	struct mc13783_priv *priv = platform_get_drvdata(pdev);
-	struct mc13783 *mc13783 = priv->mc13783;
-	int i;
-
-	for (i = 0; i < mc13783->num_regulators; i++)
-		regulator_unregister(priv->regulators[i]);
-
-	return 0;
-}
-
-static struct platform_driver mc13783_regulator_driver = {
-	.driver	= {
-		.name	= "mc13783-regulator",
-		.owner	= THIS_MODULE,
-	},
-	.remove		= __devexit_p(mc13783_regulator_remove),
-};
-
-static int __init mc13783_regulator_init(void)
-{
-	return platform_driver_probe(&mc13783_regulator_driver,
-			mc13783_regulator_probe);
-}
-subsys_initcall(mc13783_regulator_init);
-
-static void __exit mc13783_regulator_exit(void)
-{
-	platform_driver_unregister(&mc13783_regulator_driver);
-}
-module_exit(mc13783_regulator_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
-MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
-MODULE_ALIAS("platform:mc13783-regulator");

drivers/regulator/twl-regulator.c

@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/err.h>
+#include <linux/delay.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
@@ -40,6 +41,12 @@ struct twlreg_info {
 	u8			table_len;
 	const u16		*table;
 
+	/* regulator specific turn-on delay */
+	u16			delay;
+
+	/* State REMAP default configuration */
+	u8			remap;
+
 	/* chip constraints on regulator behavior */
 	u16			min_mV;
 
@@ -128,6 +135,7 @@ static int twlreg_enable(struct regulator_dev *rdev)
 {
 	struct twlreg_info	*info = rdev_get_drvdata(rdev);
 	int			grp;
+	int			ret;
 
 	grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 	if (grp < 0)
@@ -138,7 +146,11 @@ static int twlreg_enable(struct regulator_dev *rdev)
 	else
 		grp |= P1_GRP_6030;
 
-	return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
+	ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
+
+	udelay(info->delay);
+
+	return ret;
 }
 
 static int twlreg_disable(struct regulator_dev *rdev)
@@ -151,9 +163,9 @@ static int twlreg_disable(struct regulator_dev *rdev)
 		return grp;
 
 	if (twl_class_is_4030())
-		grp &= ~P1_GRP_4030;
+		grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
 	else
-		grp &= ~P1_GRP_6030;
+		grp &= ~(P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030);
 
 	return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
 }
@@ -294,6 +306,18 @@ static const u16 VSIM_VSEL_table[] = {
 static const u16 VDAC_VSEL_table[] = {
 	1200, 1300, 1800, 1800,
 };
+static const u16 VDD1_VSEL_table[] = {
+	800, 1450,
+};
+static const u16 VDD2_VSEL_table[] = {
+	800, 1450, 1500,
+};
+static const u16 VIO_VSEL_table[] = {
+	1800, 1850,
+};
+static const u16 VINTANA2_VSEL_table[] = {
+	2500, 2750,
+};
 static const u16 VAUX1_6030_VSEL_table[] = {
 	1000, 1300, 1800, 2500,
 	2800, 2900, 3000, 3000,
@@ -414,20 +438,30 @@ static struct regulator_ops twlfixed_ops = {
 
 /*----------------------------------------------------------------------*/
 
-#define TWL4030_ADJUSTABLE_LDO(label, offset, num) \
-		TWL_ADJUSTABLE_LDO(label, offset, num, TWL4030)
-#define TWL4030_FIXED_LDO(label, offset, mVolts, num) \
-		TWL_FIXED_LDO(label, offset, mVolts, num, TWL4030)
-#define TWL6030_ADJUSTABLE_LDO(label, offset, num) \
-		TWL_ADJUSTABLE_LDO(label, offset, num, TWL6030)
-#define TWL6030_FIXED_LDO(label, offset, mVolts, num) \
-		TWL_FIXED_LDO(label, offset, mVolts, num, TWL6030)
-
-#define TWL_ADJUSTABLE_LDO(label, offset, num, family) { \
+#define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) \
+		TWL_ADJUSTABLE_LDO(label, offset, num, turnon_delay, \
+			remap_conf, TWL4030)
+#define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
+			remap_conf) \
+		TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
+			remap_conf, TWL4030)
+#define TWL6030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, \
+			remap_conf) \
+		TWL_ADJUSTABLE_LDO(label, offset, num, turnon_delay, \
+			remap_conf, TWL6030)
+#define TWL6030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
+			remap_conf) \
+		TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
+			remap_conf, TWL6030)
+
+#define TWL_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf, \
+		family) { \
 	.base = offset, \
 	.id = num, \
 	.table_len = ARRAY_SIZE(label##_VSEL_table), \
 	.table = label##_VSEL_table, \
+	.delay = turnon_delay, \
+	.remap = remap_conf, \
 	.desc = { \
 		.name = #label, \
 		.id = family##_REG_##label, \
@@ -438,10 +472,13 @@ static struct regulator_ops twlfixed_ops = {
 		}, \
 	}
 
-#define TWL_FIXED_LDO(label, offset, mVolts, num, family) { \
+#define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \
+		family) { \
 	.base = offset, \
 	.id = num, \
 	.min_mV = mVolts, \
+	.delay = turnon_delay, \
+	.remap = remap_conf, \
 	.desc = { \
 		.name = #label, \
 		.id = family##_REG_##label, \
@@ -457,43 +494,41 @@ static struct regulator_ops twlfixed_ops = {
  * software control over them after boot.
  */
 static struct twlreg_info twl_regs[] = {
-	TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1),
-	TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2),
-	TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2),
-	TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3),
-	TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4),
-	TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5),
-	TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6),
-	/*
-	TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7),
-	*/
-	TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8),
-	TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9),
-	TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10),
-	/*
-	TWL4030_ADJUSTABLE_LDO(VINTANA1, 0x3f, 11),
-	TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12),
-	TWL4030_ADJUSTABLE_LDO(VINTDIG, 0x47, 13),
-	TWL4030_SMPS(VIO, 0x4b, 14),
-	TWL4030_SMPS(VDD1, 0x55, 15),
-	TWL4030_SMPS(VDD2, 0x63, 16),
-	 */
-	TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17),
-	TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18),
-	TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19),
+	TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08),
+	TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08),
+	TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08),
+	TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08),
+	TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08),
+	TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08),
+	TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08),
+	TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00),
+	TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08),
+	TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00),
+	TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08),
+	TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08),
+	TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08),
+	TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08),
+	TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08),
+	TWL4030_ADJUSTABLE_LDO(VDD1, 0x55, 15, 1000, 0x08),
+	TWL4030_ADJUSTABLE_LDO(VDD2, 0x63, 16, 1000, 0x08),
+	TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08),
+	TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08),
+	TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08),
 	/* VUSBCP is managed *only* by the USB subchip */
 
 	/* 6030 REG with base as PMC Slave Misc : 0x0030 */
-	TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1),
-	TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 2),
-	TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 3),
-	TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 4),
-	TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 5),
-	TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 7),
-	TWL6030_FIXED_LDO(VANA, 0x50, 2100, 15),
-	TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 16),
-	TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 17),
-	TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 18)
+	/* Turnon-delay and remap configuration values for 6030 are not
+	   verified since the specification is not public */
+	TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1, 0, 0x08),
+	TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 2, 0, 0x08),
+	TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 3, 0, 0x08),
+	TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 4, 0, 0x08),
+	TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 5, 0, 0x08),
+	TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 7, 0, 0x08),
+	TWL6030_FIXED_LDO(VANA, 0x50, 2100, 15, 0, 0x08),
+	TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 16, 0, 0x08),
+	TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 17, 0, 0x08),
+	TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 18, 0, 0x08)
 };
 
 static int twlreg_probe(struct platform_device *pdev)
@@ -525,6 +560,19 @@ static int twlreg_probe(struct platform_device *pdev)
 	c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
 				| REGULATOR_CHANGE_MODE
 				| REGULATOR_CHANGE_STATUS;
+	switch (pdev->id) {
+	case TWL4030_REG_VIO:
+	case TWL4030_REG_VDD1:
+	case TWL4030_REG_VDD2:
+	case TWL4030_REG_VPLL1:
+	case TWL4030_REG_VINTANA1:
+	case TWL4030_REG_VINTANA2:
+	case TWL4030_REG_VINTDIG:
+		c->always_on = true;
+		break;
+	default:
+		break;
+	}
 
 	rdev = regulator_register(&info->desc, &pdev->dev, initdata, info);
 	if (IS_ERR(rdev)) {
@@ -534,6 +582,9 @@ static int twlreg_probe(struct platform_device *pdev)
 	}
 	platform_set_drvdata(pdev, rdev);
 
+	twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP,
+						info->remap);
+
 	/* NOTE:  many regulators support short-circuit IRQs (presentable
 	 * as REGULATOR_OVER_CURRENT notifications?) configured via:
 	 *  - SC_CONFIG

drivers/regulator/wm831x-dcdc.c

@@ -19,6 +19,8 @@
 #include <linux/i2c.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/gpio.h>
 
 #include <linux/mfd/wm831x/core.h>
 #include <linux/mfd/wm831x/regulator.h>
@@ -39,6 +41,7 @@
 #define WM831X_DCDC_CONTROL_2     1
 #define WM831X_DCDC_ON_CONFIG     2
 #define WM831X_DCDC_SLEEP_CONTROL 3
+#define WM831X_DCDC_DVS_CONTROL   4
 
 /*
  * Shared
@@ -50,6 +53,10 @@ struct wm831x_dcdc {
 	int base;
 	struct wm831x *wm831x;
 	struct regulator_dev *regulator;
+	int dvs_gpio;
+	int dvs_gpio_state;
+	int on_vsel;
+	int dvs_vsel;
 };
 
 static int wm831x_dcdc_is_enabled(struct regulator_dev *rdev)
@@ -240,11 +247,9 @@ static int wm831x_buckv_list_voltage(struct regulator_dev *rdev,
 	return -EINVAL;
 }
 
-static int wm831x_buckv_set_voltage_int(struct regulator_dev *rdev, int reg,
-					 int min_uV, int max_uV)
+static int wm831x_buckv_select_min_voltage(struct regulator_dev *rdev,
+					   int min_uV, int max_uV)
 {
-	struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
-	struct wm831x *wm831x = dcdc->wm831x;
 	u16 vsel;
 
 	if (min_uV < 600000)
@@ -257,39 +262,126 @@ static int wm831x_buckv_set_voltage_int(struct regulator_dev *rdev, int reg,
 	if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV)
 		return -EINVAL;
 
-	return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_VSEL_MASK, vsel);
+	return vsel;
+}
+
+static int wm831x_buckv_select_max_voltage(struct regulator_dev *rdev,
+					   int min_uV, int max_uV)
+{
+	u16 vsel;
+
+	if (max_uV < 600000 || max_uV > 1800000)
+		return -EINVAL;
+
+	vsel = ((max_uV - 600000) / 12500) + 8;
+
+	if (wm831x_buckv_list_voltage(rdev, vsel) < min_uV ||
+	    wm831x_buckv_list_voltage(rdev, vsel) < max_uV)
+		return -EINVAL;
+
+	return vsel;
+}
+
+static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state)
+{
+	struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
+
+	if (state == dcdc->dvs_gpio_state)
+		return 0;
+
+	dcdc->dvs_gpio_state = state;
+	gpio_set_value(dcdc->dvs_gpio, state);
+
+	/* Should wait for DVS state change to be asserted if we have
+	 * a GPIO for it, for now assume the device is configured
+	 * for the fastest possible transition.
+	 */
+
+	return 0;
 }
 
 static int wm831x_buckv_set_voltage(struct regulator_dev *rdev,
-				     int min_uV, int max_uV)
+				    int min_uV, int max_uV)
 {
 	struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
-	u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
+	struct wm831x *wm831x = dcdc->wm831x;
+	int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
+	int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL;
+	int vsel, ret;
+
+	vsel = wm831x_buckv_select_min_voltage(rdev, min_uV, max_uV);
+	if (vsel < 0)
+		return vsel;
+
+	/* If this value is already set then do a GPIO update if we can */
+	if (dcdc->dvs_gpio && dcdc->on_vsel == vsel)
+		return wm831x_buckv_set_dvs(rdev, 0);
+
+	if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel)
+		return wm831x_buckv_set_dvs(rdev, 1);
+
+	/* Always set the ON status to the minimum voltage */
+	ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel);
+	if (ret < 0)
+		return ret;
+	dcdc->on_vsel = vsel;
+
+	if (!dcdc->dvs_gpio)
+		return ret;
+
+	/* Kick the voltage transition now */
+	ret = wm831x_buckv_set_dvs(rdev, 0);
+	if (ret < 0)
+		return ret;
+
+	/* Set the high voltage as the DVS voltage.  This is optimised
+	 * for CPUfreq usage, most processors will keep the maximum
+	 * voltage constant and lower the minimum with the frequency. */
+	vsel = wm831x_buckv_select_max_voltage(rdev, min_uV, max_uV);
+	if (vsel < 0) {
+		/* This should never happen - at worst the same vsel
+		 * should be chosen */
+		WARN_ON(vsel < 0);
+		return 0;
+	}
+
+	/* Don't bother if it's the same VSEL we're already using */
+	if (vsel == dcdc->on_vsel)
+		return 0;
 
-	return wm831x_buckv_set_voltage_int(rdev, reg, min_uV, max_uV);
+	ret = wm831x_set_bits(wm831x, dvs_reg, WM831X_DC1_DVS_VSEL_MASK, vsel);
+	if (ret == 0)
+		dcdc->dvs_vsel = vsel;
+	else
+		dev_warn(wm831x->dev, "Failed to set DCDC DVS VSEL: %d\n",
+			 ret);
+
+	return 0;
 }
 
 static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev,
-					     int uV)
+					    int uV)
 {
 	struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
+	struct wm831x *wm831x = dcdc->wm831x;
 	u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
+	int vsel;
+
+	vsel = wm831x_buckv_select_min_voltage(rdev, uV, uV);
+	if (vsel < 0)
+		return vsel;
 
-	return wm831x_buckv_set_voltage_int(rdev, reg, uV, uV);
+	return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel);
 }
 
 static int wm831x_buckv_get_voltage(struct regulator_dev *rdev)
 {
 	struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
-	struct wm831x *wm831x = dcdc->wm831x;
-	u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
-	int val;
 
-	val = wm831x_reg_read(wm831x, reg);
-	if (val < 0)
-		return val;
-
-	return wm831x_buckv_list_voltage(rdev, val & WM831X_DC1_ON_VSEL_MASK);
+	if (dcdc->dvs_gpio && dcdc->dvs_gpio_state)
+		return wm831x_buckv_list_voltage(rdev, dcdc->dvs_vsel);
+	else
+		return wm831x_buckv_list_voltage(rdev, dcdc->on_vsel);
 }
 
 /* Current limit options */
@@ -346,6 +438,64 @@ static struct regulator_ops wm831x_buckv_ops = {
 	.set_suspend_mode = wm831x_dcdc_set_suspend_mode,
 };
 
+/*
+ * Set up DVS control.  We just log errors since we can still run
+ * (with reduced performance) if we fail.
+ */
+static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc,
+					    struct wm831x_buckv_pdata *pdata)
+{
+	struct wm831x *wm831x = dcdc->wm831x;
+	int ret;
+	u16 ctrl;
+
+	if (!pdata || !pdata->dvs_gpio)
+		return;
+
+	switch (pdata->dvs_control_src) {
+	case 1:
+		ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT;
+		break;
+	case 2:
+		ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT;
+		break;
+	default:
+		dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n",
+			pdata->dvs_control_src, dcdc->name);
+		return;
+	}
+
+	ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL,
+			      WM831X_DC1_DVS_SRC_MASK, ctrl);
+	if (ret < 0) {
+		dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n",
+			dcdc->name, ret);
+		return;
+	}
+
+	ret = gpio_request(pdata->dvs_gpio, "DCDC DVS");
+	if (ret < 0) {
+		dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n",
+			dcdc->name, ret);
+		return;
+	}
+
+	/* gpiolib won't let us read the GPIO status so pick the higher
+	 * of the two existing voltages so we take it as platform data.
+	 */
+	dcdc->dvs_gpio_state = pdata->dvs_init_state;
+
+	ret = gpio_direction_output(pdata->dvs_gpio, dcdc->dvs_gpio_state);
+	if (ret < 0) {
+		dev_err(wm831x->dev, "Failed to enable %s DVS GPIO: %d\n",
+			dcdc->name, ret);
+		gpio_free(pdata->dvs_gpio);
+		return;
+	}
+
+	dcdc->dvs_gpio = pdata->dvs_gpio;
+}
+
 static __devinit int wm831x_buckv_probe(struct platform_device *pdev)
 {
 	struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
@@ -384,6 +534,23 @@ static __devinit int wm831x_buckv_probe(struct platform_device *pdev)
 	dcdc->desc.ops = &wm831x_buckv_ops;
 	dcdc->desc.owner = THIS_MODULE;
 
+	ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG);
+	if (ret < 0) {
+		dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret);
+		goto err;
+	}
+	dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK;
+
+	ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG);
+	if (ret < 0) {
+		dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret);
+		goto err;
+	}
+	dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK;
+
+	if (pdata->dcdc[id])
+		wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data);
+
 	dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev,
 					     pdata->dcdc[id], dcdc);
 	if (IS_ERR(dcdc->regulator)) {
@@ -422,6 +589,8 @@ err_uv:
 err_regulator:
 	regulator_unregister(dcdc->regulator);
 err:
+	if (dcdc->dvs_gpio)
+		gpio_free(dcdc->dvs_gpio);
 	kfree(dcdc);
 	return ret;
 }
@@ -434,6 +603,8 @@ static __devexit int wm831x_buckv_remove(struct platform_device *pdev)
 	wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "HC"), dcdc);
 	wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc);
 	regulator_unregister(dcdc->regulator);
+	if (dcdc->dvs_gpio)
+		gpio_free(dcdc->dvs_gpio);
 	kfree(dcdc);
 
 	return 0;

drivers/regulator/wm831x-ldo.c

@@ -470,7 +470,7 @@ static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
 	struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
 	struct wm831x *wm831x = ldo->wm831x;
 	int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
-	unsigned int ret;
+	int ret;
 
 	ret = wm831x_reg_read(wm831x, on_reg);
 	if (ret < 0)

include/linux/mfd/wm831x/pdata.h

@@ -41,6 +41,23 @@ struct wm831x_battery_pdata {
 	int timeout;        /** Charge cycle timeout, in minutes */
 };
 
+/**
+ * Configuration for the WM831x DC-DC BuckWise convertors.  This
+ * should be passed as driver_data in the regulator_init_data.
+ *
+ * Currently all the configuration is for the fast DVS switching
+ * support of the devices.  This allows MFPs on the device to be
+ * configured as an input to switch between two output voltages,
+ * allowing voltage transitions without the expense of an access over
+ * I2C or SPI buses.
+ */
+struct wm831x_buckv_pdata {
+	int dvs_gpio;        /** CPU GPIO to use for DVS switching */
+	int dvs_control_src; /** Hardware DVS source to use (1 or 2) */
+	int dvs_init_state;  /** DVS state to expect on startup */
+	int dvs_state_gpio;  /** CPU GPIO to use for monitoring status */
+};
+
 /* Sources for status LED configuration.  Values are register values
  * plus 1 to allow for a zero default for preserve.
  */

include/linux/regulator/consumer.h

@@ -35,6 +35,8 @@
 #ifndef __LINUX_REGULATOR_CONSUMER_H_
 #define __LINUX_REGULATOR_CONSUMER_H_
 
+#include <linux/device.h>
+
 /*
  * Regulator operating modes.
  *

include/linux/regulator/machine.h

@@ -43,16 +43,20 @@ struct regulator;
 /**
  * struct regulator_state - regulator state during low power system states
  *
- * This describes a regulators state during a system wide low power state.
+ * This describes a regulators state during a system wide low power
+ * state.  One of enabled or disabled must be set for the
+ * configuration to be applied.
  *
  * @uV: Operating voltage during suspend.
  * @mode: Operating mode during suspend.
  * @enabled: Enabled during suspend.
+ * @disabled: Disabled during suspend.
  */
 struct regulator_state {
 	int uV;	/* suspend voltage */
 	unsigned int mode; /* suspend regulator operating mode */
 	int enabled; /* is regulator enabled in this suspend state */
+	int disabled; /* is the regulator disbled in this suspend state */
 };
 
 /**

include/linux/regulator/max8660.h

@@ -0,0 +1,57 @@
+/*
+ * max8660.h  --  Voltage regulation for the Maxim 8660/8661
+ *
+ * Copyright (C) 2009 Wolfram Sang, Pengutronix e.K.
+ *
+ * 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 of the License.
+ *
+ * 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
+ */
+
+#ifndef __LINUX_REGULATOR_MAX8660_H
+#define __LINUX_REGULATOR_MAX8660_H
+
+#include <linux/regulator/machine.h>
+
+enum {
+	MAX8660_V3,
+	MAX8660_V4,
+	MAX8660_V5,
+	MAX8660_V6,
+	MAX8660_V7,
+	MAX8660_V_END,
+};
+
+/**
+ * max8660_subdev_data - regulator subdev data
+ * @id: regulator id
+ * @name: regulator name
+ * @platform_data: regulator init data
+ */
+struct max8660_subdev_data {
+	int				id;
+	char				*name;
+	struct regulator_init_data	*platform_data;
+};
+
+/**
+ * max8660_platform_data - platform data for max8660
+ * @num_subdevs: number of regulators used
+ * @subdevs: pointer to regulators used
+ * @en34_is_high: if EN34 is driven high, regulators cannot be en-/disabled.
+ */
+struct max8660_platform_data {
+	int num_subdevs;
+	struct max8660_subdev_data *subdevs;
+	unsigned en34_is_high:1;
+};
+#endif