[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / regulator / da903x.c

/*
 * Regulators driver for Dialog Semiconductor DA903x
 *
 * Copyright (C) 2006-2008 Marvell International Ltd.
 * Copyright (C) 2008 Compulab Ltd.
 *
 * 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/da903x.h>

/* DA9030 Registers */
#define DA9030_INVAL		(-1)
#define DA9030_LDO1011		(0x10)
#define DA9030_LDO15		(0x11)
#define DA9030_LDO1416		(0x12)
#define DA9030_LDO1819		(0x13)
#define DA9030_LDO17		(0x14)
#define DA9030_BUCK2DVM1	(0x15)
#define DA9030_BUCK2DVM2	(0x16)
#define DA9030_RCTL11		(0x17)
#define DA9030_RCTL21		(0x18)
#define DA9030_LDO1		(0x90)
#define DA9030_LDO23		(0x91)
#define DA9030_LDO45		(0x92)
#define DA9030_LDO6		(0x93)
#define DA9030_LDO78		(0x94)
#define DA9030_LDO912		(0x95)
#define DA9030_BUCK		(0x96)
#define DA9030_RCTL12		(0x97)
#define DA9030_RCTL22		(0x98)
#define DA9030_LDO_UNLOCK	(0xa0)
#define DA9030_LDO_UNLOCK_MASK	(0xe0)
#define DA9034_OVER1		(0x10)

/* DA9034 Registers */
#define DA9034_INVAL		(-1)
#define DA9034_OVER2		(0x11)
#define DA9034_OVER3		(0x12)
#define DA9034_LDO643		(0x13)
#define DA9034_LDO987		(0x14)
#define DA9034_LDO1110		(0x15)
#define DA9034_LDO1312		(0x16)
#define DA9034_LDO1514		(0x17)
#define DA9034_VCC1		(0x20)
#define DA9034_ADTV1		(0x23)
#define DA9034_ADTV2		(0x24)
#define DA9034_AVRC		(0x25)
#define DA9034_CDTV1		(0x26)
#define DA9034_CDTV2		(0x27)
#define DA9034_CVRC		(0x28)
#define DA9034_SDTV1		(0x29)
#define DA9034_SDTV2		(0x2a)
#define DA9034_SVRC		(0x2b)
#define DA9034_MDTV1		(0x32)
#define DA9034_MDTV2		(0x33)
#define DA9034_MVRC		(0x34)

struct da903x_regulator_info {
	struct regulator_desc desc;

	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;
};

static inline int check_range(struct da903x_regulator_info *info,
				int min_uV, int max_uV)
{
	if (min_uV < info->min_uV || min_uV > info->max_uV)
		return -EINVAL;

	return 0;
}

/* DA9030/DA9034 common operations */
static int da903x_set_ldo_voltage(struct regulator_dev *rdev,
				  int min_uV, int max_uV)
{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
	uint8_t val, mask;

	if (check_range(info, min_uV, max_uV)) {
		pr_err("invalid voltage range (%d, %d) uV", min_uV, max_uV);
		return -EINVAL;
	}

	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
	val <<= info->vol_shift;
	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;

	return da903x_update(da9034_dev, info->vol_reg, val, mask);
}

static int da903x_get_voltage(struct regulator_dev *rdev)
{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
	uint8_t val, mask;
	int ret;

	ret = da903x_read(da9034_dev, info->vol_reg, &val);
	if (ret)
		return ret;

	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
	val = (val & mask) >> info->vol_shift;

	return info->min_uV + info->step_uV * val;
}

static int da903x_enable(struct regulator_dev *rdev)
{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = rdev_get_dev(rdev)->parent;

	return da903x_set_bits(da9034_dev, info->enable_reg,
					1 << info->enable_bit);
}

static int da903x_disable(struct regulator_dev *rdev)
{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = rdev_get_dev(rdev)->parent;

	return da903x_clr_bits(da9034_dev, info->enable_reg,
					1 << info->enable_bit);
}

static int da903x_is_enabled(struct regulator_dev *rdev)
{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
	uint8_t reg_val;
	int ret;

	ret = da903x_read(da9034_dev, info->enable_reg, &reg_val);
	if (ret)
		return ret;

	return reg_val & (1 << info->enable_bit);
}

/* DA9030 specific operations */
static int da9030_set_ldo1_15_voltage(struct regulator_dev *rdev,
				       int min_uV, int max_uV)
{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da903x_dev = rdev_get_dev(rdev)->parent;
	uint8_t val, mask;
	int ret;

	if (check_range(info, min_uV, max_uV)) {
		pr_err("invalid voltage range (%d, %d) uV", min_uV, max_uV);
		return -EINVAL;
	}

	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
	val <<= info->vol_shift;
	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
	val |= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */
	mask |= DA9030_LDO_UNLOCK_MASK;

	/* write twice */
	ret = da903x_update(da903x_dev, info->vol_reg, val, mask);
	if (ret)
		return ret;

	return da903x_update(da903x_dev, info->vol_reg, val, mask);
}

static int da9030_set_ldo14_voltage(struct regulator_dev *rdev,
				  int min_uV, int max_uV)
{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da903x_dev = rdev_get_dev(rdev)->parent;
	uint8_t val, mask;
	int thresh;

	if (check_range(info, min_uV, max_uV)) {
		pr_err("invalid voltage range (%d, %d) uV", min_uV, max_uV);
		return -EINVAL;
	}

	thresh = (info->max_uV + info->min_uV) / 2;
	if (min_uV < thresh) {
		val = (thresh - min_uV + info->step_uV - 1) / info->step_uV;
		val |= 0x4;
	} else {
		val = (min_uV - thresh + info->step_uV - 1) / info->step_uV;
	}

	val <<= info->vol_shift;
	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;

	return da903x_update(da903x_dev, info->vol_reg, val, mask);
}

static int da9030_get_ldo14_voltage(struct regulator_dev *rdev)
{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da903x_dev = rdev_get_dev(rdev)->parent;
	uint8_t val, mask;
	int ret;

	ret = da903x_read(da903x_dev, info->vol_reg, &val);
	if (ret)
		return ret;

	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
	val = (val & mask) >> info->vol_shift;

	if (val & 0x4)
		return info->min_uV + info->step_uV * (3 - (val & ~0x4));
	else
		return (info->max_uV + info->min_uV) / 2 +
			info->step_uV * (val & ~0x4);
}

/* DA9034 specific operations */
static int da9034_set_dvc_voltage(struct regulator_dev *rdev,
				  int min_uV, int max_uV)
{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
	uint8_t val, mask;
	int ret;

	if (check_range(info, min_uV, max_uV)) {
		pr_err("invalid voltage range (%d, %d) uV", min_uV, max_uV);
		return -EINVAL;
	}

	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
	val <<= info->vol_shift;
	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;

	ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
	if (ret)
		return ret;

	ret = da903x_set_bits(da9034_dev, info->update_reg,
					1 << info->update_bit);
	return ret;
}

static int da9034_set_ldo12_voltage(struct regulator_dev *rdev,
				    int min_uV, int max_uV)
{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
	uint8_t val, mask;

	if (check_range(info, min_uV, max_uV)) {
		pr_err("invalid voltage range (%d, %d) uV", min_uV, max_uV);
		return -EINVAL;
	}

	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
	val = (val > 7 || val < 20) ? 8 : val - 12;
	val <<= info->vol_shift;
	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;

	return da903x_update(da9034_dev, info->vol_reg, val, mask);
}

static int da9034_get_ldo12_voltage(struct regulator_dev *rdev)
{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
	uint8_t val, mask;
	int ret;

	ret = da903x_read(da9034_dev, info->vol_reg, &val);
	if (ret)
		return ret;

	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
	val = (val & mask) >> info->vol_shift;

	if (val >= 8)
		return 2700000 + info->step_uV * (val - 8);

	return info->min_uV + info->step_uV * val;
}

static struct regulator_ops da903x_regulator_ldo_ops = {
	.set_voltage	= da903x_set_ldo_voltage,
	.get_voltage	= da903x_get_voltage,
	.enable		= da903x_enable,
	.disable	= da903x_disable,
	.is_enabled	= da903x_is_enabled,
};

/* NOTE: this is dedicated for the insane DA9030 LDO14 */
static struct regulator_ops da9030_regulator_ldo14_ops = {
	.set_voltage	= da9030_set_ldo14_voltage,
	.get_voltage	= da9030_get_ldo14_voltage,
	.enable		= da903x_enable,
	.disable	= da903x_disable,
	.is_enabled	= da903x_is_enabled,
};

/* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks  */
static struct regulator_ops da9030_regulator_ldo1_15_ops = {
	.set_voltage	= da9030_set_ldo1_15_voltage,
	.get_voltage	= da903x_get_voltage,
	.enable		= da903x_enable,
	.disable	= da903x_disable,
	.is_enabled	= da903x_is_enabled,
};

static struct regulator_ops da9034_regulator_dvc_ops = {
	.set_voltage	= da9034_set_dvc_voltage,
	.get_voltage	= da903x_get_voltage,
	.enable		= da903x_enable,
	.disable	= da903x_disable,
	.is_enabled	= da903x_is_enabled,
};

/* NOTE: this is dedicated for the insane LDO12 */
static struct regulator_ops da9034_regulator_ldo12_ops = {
	.set_voltage	= da9034_set_ldo12_voltage,
	.get_voltage	= da9034_get_ldo12_voltage,
	.enable		= da903x_enable,
	.disable	= da903x_disable,
	.is_enabled	= da903x_is_enabled,
};

#define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit)	\
{									\
	.desc	= {							\
		.name	= "LDO" #_id,					\
		.ops	= &da903x_regulator_ldo_ops,			\
		.type	= REGULATOR_VOLTAGE,				\
		.id	= _pmic##_ID_LDO##_id,				\
		.owner	= THIS_MODULE,					\
	},								\
	.min_uV		= (min) * 1000,					\
	.max_uV		= (max) * 1000,					\
	.step_uV	= (step) * 1000,				\
	.vol_reg	= _pmic##_##vreg,				\
	.vol_shift	= (shift),					\
	.vol_nbits	= (nbits),					\
	.enable_reg	= _pmic##_##ereg,				\
	.enable_bit	= (ebit),					\
}

#define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
{									\
	.desc	= {							\
		.name	= #_id,						\
		.ops	= &da9034_regulator_dvc_ops,			\
		.type	= REGULATOR_VOLTAGE,				\
		.id	= DA9034_ID_##_id,				\
		.owner	= THIS_MODULE,					\
	},								\
	.min_uV		= (min) * 1000,					\
	.max_uV		= (max) * 1000,					\
	.step_uV	= (step) * 1000,				\
	.vol_reg	= DA9034_##vreg,				\
	.vol_shift	= (0),						\
	.vol_nbits	= (nbits),					\
	.update_reg	= DA9034_##ureg,				\
	.update_bit	= (ubit),					\
	.enable_reg	= DA9034_##ereg,				\
	.enable_bit	= (ebit),					\
}

#define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit)	\
	DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)

#define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit)	\
	DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)

static struct da903x_regulator_info da903x_regulator_info[] = {
	/* DA9030 */
	DA9030_LDO( 1, 1200, 3200, 100,    LDO1, 0, 5, RCTL12, 1),
	DA9030_LDO( 2, 1800, 3200, 100,   LDO23, 0, 4, RCTL12, 2),
	DA9030_LDO( 3, 1800, 3200, 100,   LDO23, 4, 4, RCTL12, 3),
	DA9030_LDO( 4, 1800, 3200, 100,   LDO45, 0, 4, RCTL12, 4),
	DA9030_LDO( 5, 1800, 3200, 100,   LDO45, 4, 4, RCTL12, 5),
	DA9030_LDO( 6, 1800, 3200, 100,    LDO6, 0, 4, RCTL12, 6),
	DA9030_LDO( 7, 1800, 3200, 100,   LDO78, 0, 4, RCTL12, 7),
	DA9030_LDO( 8, 1800, 3200, 100,   LDO78, 4, 4, RCTL22, 0),
	DA9030_LDO( 9, 1800, 3200, 100,  LDO912, 0, 4, RCTL22, 1),
	DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
	DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
	DA9030_LDO(12, 1800, 3200, 100,  LDO912, 4, 4, RCTL22, 4),
	DA9030_LDO(14, 2760, 2940,  30, LDO1416, 0, 3, RCTL11, 4),
	DA9030_LDO(15, 1100, 2650,  50,	  LDO15, 0, 5, RCTL11, 5),
	DA9030_LDO(16, 1100, 2650,  50, LDO1416, 3, 5, RCTL11, 6),
	DA9030_LDO(17, 1800, 3200, 100,   LDO17, 0, 4, RCTL11, 7),
	DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
	DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
	DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */

	/* DA9034 */
	DA9034_DVC(BUCK1, 725, 1500, 25, ADTV1, 5, VCC1, 0, OVER1, 0),
	DA9034_DVC(BUCK2, 725, 1500, 25, CDTV1, 5, VCC1, 2, OVER1, 1),
	DA9034_DVC(LDO2,  725, 1500, 25, SDTV1, 5, VCC1, 4, OVER1, 2),
	DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),

	DA9034_LDO( 3, 1800, 3300, 100,  LDO643, 0, 4, OVER3, 5),
	DA9034_LDO( 4, 1800, 2900,1100,  LDO643, 4, 1, OVER3, 6),
	DA9034_LDO( 6, 2500, 2850,  50,  LDO643, 5, 3, OVER2, 0),
	DA9034_LDO( 7, 2700, 3050,  50,  LDO987, 0, 3, OVER2, 1),
	DA9034_LDO( 8, 2700, 2850,  50,  LDO987, 3, 2, OVER2, 2),
	DA9034_LDO( 9, 2700, 3050,  50,  LDO987, 5, 3, OVER2, 3),
	DA9034_LDO(10, 2700, 3050,  50, LDO1110, 0, 3, OVER2, 4),
	DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
	DA9034_LDO(12, 1700, 3050,  50, LDO1312, 0, 4, OVER3, 6),
	DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
	DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
	DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
	DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */
};

static inline struct da903x_regulator_info *find_regulator_info(int id)
{
	struct da903x_regulator_info *ri;
	int i;

	for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
		ri = &da903x_regulator_info[i];
		if (ri->desc.id == id)
			return ri;
	}
	return NULL;
}

static int __devinit da903x_regulator_probe(struct platform_device *pdev)
{
	struct da903x_regulator_info *ri = NULL;
	struct regulator_dev *rdev;

	ri = find_regulator_info(pdev->id);
	if (ri == NULL) {
		dev_err(&pdev->dev, "invalid regulator ID specified\n");
		return -EINVAL;
	}

	/* Workaround for the weird LDO12 voltage setting */
	if (ri->desc.id == DA9034_ID_LDO12)
		ri->desc.ops = &da9034_regulator_ldo12_ops;

	if (ri->desc.id == DA9030_ID_LDO14)
		ri->desc.ops = &da9030_regulator_ldo14_ops;

	if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15)
		ri->desc.ops = &da9030_regulator_ldo1_15_ops;

	rdev = regulator_register(&ri->desc, pdev->dev.parent, ri);
	if (IS_ERR(rdev)) {
		dev_err(&pdev->dev, "failed to register regulator %s\n",
				ri->desc.name);
		return PTR_ERR(rdev);
	}

	platform_set_drvdata(pdev, rdev);
	return 0;
}

static int __devexit da903x_regulator_remove(struct platform_device *pdev)
{
	struct regulator_dev *rdev = platform_get_drvdata(pdev);

	regulator_unregister(rdev);
	return 0;
}

static struct platform_driver da903x_regulator_driver = {
	.driver	= {
		.name	= "da903x-regulator",
		.owner	= THIS_MODULE,
	},
	.probe		= da903x_regulator_probe,
	.remove		= da903x_regulator_remove,
};

static int __init da903x_regulator_init(void)
{
	return platform_driver_register(&da903x_regulator_driver);
}
module_init(da903x_regulator_init);

static void __exit da903x_regulator_exit(void)
{
	platform_driver_unregister(&da903x_regulator_driver);
}
module_exit(da903x_regulator_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
	      "Mike Rapoport <mike@compulab.co.il>");
MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
MODULE_ALIAS("platform:da903x-regulator");
Commit	Line	Data
129eef96 EM	1	/*
	2	* Regulators driver for Dialog Semiconductor DA903x
	3	*
	4	* Copyright (C) 2006-2008 Marvell International Ltd.
	5	* Copyright (C) 2008 Compulab Ltd.
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/kernel.h>
	13	#include <linux/init.h>
	14	#include <linux/err.h>
	15	#include <linux/platform_device.h>
	16	#include <linux/regulator/driver.h>
	17	#include <linux/regulator/machine.h>
	18	#include <linux/mfd/da903x.h>
	19
	20	/* DA9030 Registers */
	21	#define DA9030_INVAL (-1)
	22	#define DA9030_LDO1011 (0x10)
	23	#define DA9030_LDO15 (0x11)
	24	#define DA9030_LDO1416 (0x12)
	25	#define DA9030_LDO1819 (0x13)
	26	#define DA9030_LDO17 (0x14)
	27	#define DA9030_BUCK2DVM1 (0x15)
	28	#define DA9030_BUCK2DVM2 (0x16)
	29	#define DA9030_RCTL11 (0x17)
	30	#define DA9030_RCTL21 (0x18)
	31	#define DA9030_LDO1 (0x90)
	32	#define DA9030_LDO23 (0x91)
	33	#define DA9030_LDO45 (0x92)
	34	#define DA9030_LDO6 (0x93)
	35	#define DA9030_LDO78 (0x94)
	36	#define DA9030_LDO912 (0x95)
	37	#define DA9030_BUCK (0x96)
	38	#define DA9030_RCTL12 (0x97)
	39	#define DA9030_RCTL22 (0x98)
	40	#define DA9030_LDO_UNLOCK (0xa0)
	41	#define DA9030_LDO_UNLOCK_MASK (0xe0)
	42	#define DA9034_OVER1 (0x10)
	43
	44	/* DA9034 Registers */
	45	#define DA9034_INVAL (-1)
	46	#define DA9034_OVER2 (0x11)
	47	#define DA9034_OVER3 (0x12)
	48	#define DA9034_LDO643 (0x13)
	49	#define DA9034_LDO987 (0x14)
	50	#define DA9034_LDO1110 (0x15)
	51	#define DA9034_LDO1312 (0x16)
	52	#define DA9034_LDO1514 (0x17)
	53	#define DA9034_VCC1 (0x20)
	54	#define DA9034_ADTV1 (0x23)
	55	#define DA9034_ADTV2 (0x24)
	56	#define DA9034_AVRC (0x25)
	57	#define DA9034_CDTV1 (0x26)
	58	#define DA9034_CDTV2 (0x27)
	59	#define DA9034_CVRC (0x28)
	60	#define DA9034_SDTV1 (0x29)
	61	#define DA9034_SDTV2 (0x2a)
	62	#define DA9034_SVRC (0x2b)
	63	#define DA9034_MDTV1 (0x32)
	64	#define DA9034_MDTV2 (0x33)
65	#define DA9034_MVRC (0x34)
66
67	struct da903x_regulator_info {
68	struct regulator_desc desc;
69
70	int min_uV;
71	int max_uV;
72	int step_uV;
73	int vol_reg;
74	int vol_shift;
75	int vol_nbits;
76	int update_reg;
77	int update_bit;
78	int enable_reg;
79	int enable_bit;
80	};
81
82	static inline int check_range(struct da903x_regulator_info *info,
83	int min_uV, int max_uV)
84	{
85	if (min_uV < info->min_uV \|\| min_uV > info->max_uV)
86	return -EINVAL;
87
88	return 0;
89	}
90
91	/* DA9030/DA9034 common operations */
92	static int da903x_set_ldo_voltage(struct regulator_dev *rdev,
93	int min_uV, int max_uV)
94	{
95	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
96	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
97	uint8_t val, mask;
98
99	if (check_range(info, min_uV, max_uV)) {
100	pr_err("invalid voltage range (%d, %d) uV", min_uV, max_uV);
101	return -EINVAL;
102	}
103
104	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
105	val <<= info->vol_shift;
106	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
107
108	return da903x_update(da9034_dev, info->vol_reg, val, mask);
109	}
110
111	static int da903x_get_voltage(struct regulator_dev *rdev)
112	{
113	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
114	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
115	uint8_t val, mask;
116	int ret;
117
118	ret = da903x_read(da9034_dev, info->vol_reg, &val);
119	if (ret)
120	return ret;
121
122	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
123	val = (val & mask) >> info->vol_shift;
124
125	return info->min_uV + info->step_uV * val;
126	}
127
128	static int da903x_enable(struct regulator_dev *rdev)
129	{
130	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
131	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
132
133	return da903x_set_bits(da9034_dev, info->enable_reg,
134	1 << info->enable_bit);
135	}
136
137	static int da903x_disable(struct regulator_dev *rdev)
138	{
139	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
140	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
141
142	return da903x_clr_bits(da9034_dev, info->enable_reg,
143	1 << info->enable_bit);
144	}
145
146	static int da903x_is_enabled(struct regulator_dev *rdev)
147	{
148	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
149	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
150	uint8_t reg_val;
151	int ret;
152
153	ret = da903x_read(da9034_dev, info->enable_reg, &reg_val);
154	if (ret)
155	return ret;
156
157	return reg_val & (1 << info->enable_bit);
158	}
159
160	/* DA9030 specific operations */
161	static int da9030_set_ldo1_15_voltage(struct regulator_dev *rdev,
162	int min_uV, int max_uV)
163	{
164	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
165	struct device *da903x_dev = rdev_get_dev(rdev)->parent;
166	uint8_t val, mask;
167	int ret;
168
169	if (check_range(info, min_uV, max_uV)) {
170	pr_err("invalid voltage range (%d, %d) uV", min_uV, max_uV);
171	return -EINVAL;
172	}
173
174	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
175	val <<= info->vol_shift;
176	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
177	val \|= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */
178	mask \|= DA9030_LDO_UNLOCK_MASK;
179
180	/* write twice */
181	ret = da903x_update(da903x_dev, info->vol_reg, val, mask);
182	if (ret)
183	return ret;
184
185	return da903x_update(da903x_dev, info->vol_reg, val, mask);
186	}
187
188	static int da9030_set_ldo14_voltage(struct regulator_dev *rdev,
189	int min_uV, int max_uV)
190	{
191	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
192	struct device *da903x_dev = rdev_get_dev(rdev)->parent;
193	uint8_t val, mask;
194	int thresh;
195
196	if (check_range(info, min_uV, max_uV)) {
197	pr_err("invalid voltage range (%d, %d) uV", min_uV, max_uV);
198	return -EINVAL;
199	}
200
201	thresh = (info->max_uV + info->min_uV) / 2;
202	if (min_uV < thresh) {
203	val = (thresh - min_uV + info->step_uV - 1) / info->step_uV;
204	val \|= 0x4;
205	} else {
206	val = (min_uV - thresh + info->step_uV - 1) / info->step_uV;
207	}
208
209	val <<= info->vol_shift;
210	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
211
212	return da903x_update(da903x_dev, info->vol_reg, val, mask);
213	}
214
215	static int da9030_get_ldo14_voltage(struct regulator_dev *rdev)
216	{
217	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
218	struct device *da903x_dev = rdev_get_dev(rdev)->parent;
219	uint8_t val, mask;
220	int ret;
221
222	ret = da903x_read(da903x_dev, info->vol_reg, &val);
223	if (ret)
224	return ret;
225
226	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
227	val = (val & mask) >> info->vol_shift;
228
229	if (val & 0x4)
230	return info->min_uV + info->step_uV * (3 - (val & ~0x4));
231	else
232	return (info->max_uV + info->min_uV) / 2 +
233	info->step_uV * (val & ~0x4);
234	}
235
236	/* DA9034 specific operations */
237	static int da9034_set_dvc_voltage(struct regulator_dev *rdev,
238	int min_uV, int max_uV)
239	{
240	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
241	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
242	uint8_t val, mask;
243	int ret;
244
245	if (check_range(info, min_uV, max_uV)) {
246	pr_err("invalid voltage range (%d, %d) uV", min_uV, max_uV);
247	return -EINVAL;
248	}
249
250	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
251	val <<= info->vol_shift;
252	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
253
254	ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
255	if (ret)
256	return ret;
257
258	ret = da903x_set_bits(da9034_dev, info->update_reg,
259	1 << info->update_bit);
260	return ret;
261	}
262
263	static int da9034_set_ldo12_voltage(struct regulator_dev *rdev,
264	int min_uV, int max_uV)
265	{
266	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
267	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
268	uint8_t val, mask;
269
270	if (check_range(info, min_uV, max_uV)) {
271	pr_err("invalid voltage range (%d, %d) uV", min_uV, max_uV);
272	return -EINVAL;
273	}
274
275	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
276	val = (val > 7 \|\| val < 20) ? 8 : val - 12;
277	val <<= info->vol_shift;
278	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
279
280	return da903x_update(da9034_dev, info->vol_reg, val, mask);
281	}
282
283	static int da9034_get_ldo12_voltage(struct regulator_dev *rdev)
284	{
285	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
286	struct device *da9034_dev = rdev_get_dev(rdev)->parent;
287	uint8_t val, mask;
288	int ret;
289
290	ret = da903x_read(da9034_dev, info->vol_reg, &val);
291	if (ret)
292	return ret;
293
294	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
295	val = (val & mask) >> info->vol_shift;
296
297	if (val >= 8)
298	return 2700000 + info->step_uV * (val - 8);
299
300	return info->min_uV + info->step_uV * val;
301	}
302
303	static struct regulator_ops da903x_regulator_ldo_ops = {
304	.set_voltage = da903x_set_ldo_voltage,
305	.get_voltage = da903x_get_voltage,
306	.enable = da903x_enable,
307	.disable = da903x_disable,
308	.is_enabled = da903x_is_enabled,
309	};
310
311	/* NOTE: this is dedicated for the insane DA9030 LDO14 */
312	static struct regulator_ops da9030_regulator_ldo14_ops = {
313	.set_voltage = da9030_set_ldo14_voltage,
314	.get_voltage = da9030_get_ldo14_voltage,
315	.enable = da903x_enable,
316	.disable = da903x_disable,
317	.is_enabled = da903x_is_enabled,
318	};
319
320	/* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks */
321	static struct regulator_ops da9030_regulator_ldo1_15_ops = {
322	.set_voltage = da9030_set_ldo1_15_voltage,
323	.get_voltage = da903x_get_voltage,
324	.enable = da903x_enable,
325	.disable = da903x_disable,
326	.is_enabled = da903x_is_enabled,
327	};
328
329	static struct regulator_ops da9034_regulator_dvc_ops = {
330	.set_voltage = da9034_set_dvc_voltage,
331	.get_voltage = da903x_get_voltage,
332	.enable = da903x_enable,
333	.disable = da903x_disable,
334	.is_enabled = da903x_is_enabled,
335	};
336
337	/* NOTE: this is dedicated for the insane LDO12 */
338	static struct regulator_ops da9034_regulator_ldo12_ops = {
339	.set_voltage = da9034_set_ldo12_voltage,
340	.get_voltage = da9034_get_ldo12_voltage,
341	.enable = da903x_enable,
342	.disable = da903x_disable,
343	.is_enabled = da903x_is_enabled,
344	};
345
346	#define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit) \
347	{ \
348	.desc = { \
349	.name = "LDO" #_id, \
350	.ops = &da903x_regulator_ldo_ops, \
351	.type = REGULATOR_VOLTAGE, \
352	.id = _pmic##_ID_LDO##_id, \
353	.owner = THIS_MODULE, \
354	}, \
355	.min_uV = (min) * 1000, \
356	.max_uV = (max) * 1000, \
357	.step_uV = (step) * 1000, \
358	.vol_reg = _pmic##_##vreg, \
359	.vol_shift = (shift), \
360	.vol_nbits = (nbits), \
361	.enable_reg = _pmic##_##ereg, \
362	.enable_bit = (ebit), \
363	}
364
365	#define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
366	{ \
367	.desc = { \
368	.name = #_id, \
369	.ops = &da9034_regulator_dvc_ops, \
370	.type = REGULATOR_VOLTAGE, \
371	.id = DA9034_ID_##_id, \
372	.owner = THIS_MODULE, \
373	}, \
374	.min_uV = (min) * 1000, \
375	.max_uV = (max) * 1000, \
376	.step_uV = (step) * 1000, \
377	.vol_reg = DA9034_##vreg, \
378	.vol_shift = (0), \
379	.vol_nbits = (nbits), \
380	.update_reg = DA9034_##ureg, \
381	.update_bit = (ubit), \
382	.enable_reg = DA9034_##ereg, \
383	.enable_bit = (ebit), \
384	}
385
386	#define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
387	DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
388
389	#define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
390	DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
391
392	static struct da903x_regulator_info da903x_regulator_info[] = {
393	/* DA9030 */
394	DA9030_LDO( 1, 1200, 3200, 100, LDO1, 0, 5, RCTL12, 1),
395	DA9030_LDO( 2, 1800, 3200, 100, LDO23, 0, 4, RCTL12, 2),
396	DA9030_LDO( 3, 1800, 3200, 100, LDO23, 4, 4, RCTL12, 3),
397	DA9030_LDO( 4, 1800, 3200, 100, LDO45, 0, 4, RCTL12, 4),
398	DA9030_LDO( 5, 1800, 3200, 100, LDO45, 4, 4, RCTL12, 5),
399	DA9030_LDO( 6, 1800, 3200, 100, LDO6, 0, 4, RCTL12, 6),
400	DA9030_LDO( 7, 1800, 3200, 100, LDO78, 0, 4, RCTL12, 7),
401	DA9030_LDO( 8, 1800, 3200, 100, LDO78, 4, 4, RCTL22, 0),
402	DA9030_LDO( 9, 1800, 3200, 100, LDO912, 0, 4, RCTL22, 1),
403	DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
404	DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
405	DA9030_LDO(12, 1800, 3200, 100, LDO912, 4, 4, RCTL22, 4),
406	DA9030_LDO(14, 2760, 2940, 30, LDO1416, 0, 3, RCTL11, 4),
407	DA9030_LDO(15, 1100, 2650, 50, LDO15, 0, 5, RCTL11, 5),
408	DA9030_LDO(16, 1100, 2650, 50, LDO1416, 3, 5, RCTL11, 6),
409	DA9030_LDO(17, 1800, 3200, 100, LDO17, 0, 4, RCTL11, 7),
410	DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
411	DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
412	DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */
413
414	/* DA9034 */
415	DA9034_DVC(BUCK1, 725, 1500, 25, ADTV1, 5, VCC1, 0, OVER1, 0),
416	DA9034_DVC(BUCK2, 725, 1500, 25, CDTV1, 5, VCC1, 2, OVER1, 1),
417	DA9034_DVC(LDO2, 725, 1500, 25, SDTV1, 5, VCC1, 4, OVER1, 2),
418	DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),
419
420	DA9034_LDO( 3, 1800, 3300, 100, LDO643, 0, 4, OVER3, 5),
421	DA9034_LDO( 4, 1800, 2900,1100, LDO643, 4, 1, OVER3, 6),
422	DA9034_LDO( 6, 2500, 2850, 50, LDO643, 5, 3, OVER2, 0),
423	DA9034_LDO( 7, 2700, 3050, 50, LDO987, 0, 3, OVER2, 1),
424	DA9034_LDO( 8, 2700, 2850, 50, LDO987, 3, 2, OVER2, 2),
425	DA9034_LDO( 9, 2700, 3050, 50, LDO987, 5, 3, OVER2, 3),
426	DA9034_LDO(10, 2700, 3050, 50, LDO1110, 0, 3, OVER2, 4),
427	DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
428	DA9034_LDO(12, 1700, 3050, 50, LDO1312, 0, 4, OVER3, 6),
429	DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
430	DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
431	DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
432	DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */
433	};
434
435	static inline struct da903x_regulator_info *find_regulator_info(int id)
436	{
437	struct da903x_regulator_info *ri;
438	int i;
439
440	for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
441	ri = &da903x_regulator_info[i];
442	if (ri->desc.id == id)
443	return ri;
444	}
445	return NULL;
446	}
447
448	static int __devinit da903x_regulator_probe(struct platform_device *pdev)
449	{
450	struct da903x_regulator_info *ri = NULL;
451	struct regulator_dev *rdev;
452
453	ri = find_regulator_info(pdev->id);
454	if (ri == NULL) {
455	dev_err(&pdev->dev, "invalid regulator ID specified\n");
456	return -EINVAL;
457	}
458
459	/* Workaround for the weird LDO12 voltage setting */
460	if (ri->desc.id == DA9034_ID_LDO12)
461	ri->desc.ops = &da9034_regulator_ldo12_ops;
462
463	if (ri->desc.id == DA9030_ID_LDO14)
464	ri->desc.ops = &da9030_regulator_ldo14_ops;
465
466	if (ri->desc.id == DA9030_ID_LDO1 \|\| ri->desc.id == DA9030_ID_LDO15)
467	ri->desc.ops = &da9030_regulator_ldo1_15_ops;
468
469	rdev = regulator_register(&ri->desc, pdev->dev.parent, ri);
470	if (IS_ERR(rdev)) {
471	dev_err(&pdev->dev, "failed to register regulator %s\n",
472	ri->desc.name);
473	return PTR_ERR(rdev);
474	}
475
476	platform_set_drvdata(pdev, rdev);
477	return 0;
478	}
479
480	static int __devexit da903x_regulator_remove(struct platform_device *pdev)
481	{
482	struct regulator_dev *rdev = platform_get_drvdata(pdev);
483
484	regulator_unregister(rdev);
485	return 0;
486	}
487
488	static struct platform_driver da903x_regulator_driver = {
489	.driver = {
490	.name = "da903x-regulator",
491	.owner = THIS_MODULE,
492	},
493	.probe = da903x_regulator_probe,
494	.remove = da903x_regulator_remove,
495	};
496
497	static int __init da903x_regulator_init(void)
498	{
499	return platform_driver_register(&da903x_regulator_driver);
500	}
501	module_init(da903x_regulator_init);
502
503	static void __exit da903x_regulator_exit(void)
504	{
505	platform_driver_unregister(&da903x_regulator_driver);
506	}
507	module_exit(da903x_regulator_exit);
508
509	MODULE_LICENSE("GPL");
510	MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
511	"Mike Rapoport <mike@compulab.co.il>");
512	MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
513	MODULE_ALIAS("platform:da903x-regulator");