drivers/regulator/mc13783-regulator.c - kernel/msm-4.9 - Gitiles

 /*
  * Regulator Driver for Freescale MC13783 PMIC
  *
  * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
  * Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.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/mfd/mc13783.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/driver.h>
 #include <linux/platform_device.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/err.h>

 #define MC13783_REG_SWITCHERS5			29
 #define MC13783_REG_SWITCHERS5_SW3EN			(1 << 20)
 #define MC13783_REG_SWITCHERS5_SW3VSEL			18
 #define MC13783_REG_SWITCHERS5_SW3VSEL_M		(3 << 18)

 #define MC13783_REG_REGULATORSETTING0		30
 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL		2
 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL		4
 #define MC13783_REG_REGULATORSETTING0_VGENVSEL		6
 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL	9
 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL	11
 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL		13
 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL		14
 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL		15
 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL		16

 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M	(3 << 2)
 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M	(3 << 4)
 #define MC13783_REG_REGULATORSETTING0_VGENVSEL_M	(7 << 6)
 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M	(3 << 9)
 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M	(3 << 11)
 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M	(1 << 13)
 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M	(1 << 14)
 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M	(1 << 15)
 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M	(7 << 16)

 #define MC13783_REG_REGULATORSETTING1		31
 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL		0
 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL		2
 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL		4
 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL		6
 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL		9

 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M	(3 << 0)
 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M	(3 << 2)
 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M	(3 << 4)
 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M	(7 << 6)
 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M	(7 << 9)

 #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)
 #define MC13783_REG_POWERMISC_PWGT1SPIEN		(1 << 15)
 #define MC13783_REG_POWERMISC_PWGT2SPIEN		(1 << 16)

 #define MC13783_REG_POWERMISC_PWGTSPI_M			(3 << 15)


 struct mc13783_regulator {
 	struct regulator_desc desc;
 	int reg;
 	int enable_bit;
 	int vsel_reg;
 	int vsel_shift;
 	int vsel_mask;
 	int const *voltages;
 };

 /* Voltage Values */
 static const int const mc13783_sw3_val[] = {
 	5000000, 5000000, 5000000, 5500000,
 };

 static const int const mc13783_vaudio_val[] = {
 	2775000,
 };

 static const int const mc13783_viohi_val[] = {
 	2775000,
 };

 static const int const mc13783_violo_val[] = {
 	1200000, 1300000, 1500000, 1800000,
 };

 static const int const mc13783_vdig_val[] = {
 	1200000, 1300000, 1500000, 1800000,
 };

 static const int const mc13783_vgen_val[] = {
 	1200000, 1300000, 1500000, 1800000,
 	1100000, 2000000, 2775000, 2400000,
 };

 static const int const mc13783_vrfdig_val[] = {
 	1200000, 1500000, 1800000, 1875000,
 };

 static const int const mc13783_vrfref_val[] = {
 	2475000, 2600000, 2700000, 2775000,
 };

 static const int const mc13783_vrfcp_val[] = {
 	2700000, 2775000,
 };

 static const int const mc13783_vsim_val[] = {
 	1800000, 2900000, 3000000,
 };

 static const int const mc13783_vesim_val[] = {
 	1800000, 2900000,
 };

 static const int const mc13783_vcam_val[] = {
 	1500000, 1800000, 2500000, 2550000,
 	2600000, 2750000, 2800000, 3000000,
 };

 static const int const mc13783_vrfbg_val[] = {
 	1250000,
 };

 static const int const mc13783_vvib_val[] = {
 	1300000, 1800000, 2000000, 3000000,
 };

 static const int const mc13783_vmmc_val[] = {
 	1600000, 1800000, 2000000, 2600000,
 	2700000, 2800000, 2900000, 3000000,
 };

 static const int const mc13783_vrf_val[] = {
 	1500000, 1875000, 2700000, 2775000,
 };

 static const int const mc13783_gpo_val[] = {
 	3100000,
 };

 static const int const mc13783_pwgtdrv_val[] = {
 	5500000,
 };

 static struct regulator_ops mc13783_regulator_ops;
 static struct regulator_ops mc13783_fixed_regulator_ops;
 static struct regulator_ops mc13783_gpo_regulator_ops;

 #define MC13783_DEFINE(prefix, _name, _reg, _vsel_reg, _voltages)	\
 	[MC13783_ ## prefix ## _ ## _name] = {				\
 		.desc = {						\
 			.name = #prefix "_" #_name,			\
 			.n_voltages = ARRAY_SIZE(_voltages),		\
 			.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,	\
 		.vsel_reg = MC13783_REG_ ## _vsel_reg,			\
 		.vsel_shift = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL,\
 		.vsel_mask = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL_M,\
 		.voltages =  _voltages,					\
 	}

 #define MC13783_FIXED_DEFINE(prefix, _name, _reg, _voltages)		\
 	[MC13783_ ## prefix ## _ ## _name] = {				\
 		.desc = {						\
 			.name = #prefix "_" #_name,			\
 			.n_voltages = ARRAY_SIZE(_voltages),		\
 			.ops = &mc13783_fixed_regulator_ops,		\
 			.type = REGULATOR_VOLTAGE,			\
 			.id = MC13783_ ## prefix ## _ ## _name,		\
 			.owner = THIS_MODULE,				\
 		},							\
 		.reg = MC13783_REG_ ## _reg,				\
 		.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN,	\
 		.voltages =  _voltages,					\
 	}

 #define MC13783_GPO_DEFINE(prefix, _name, _reg,  _voltages)		\
 	[MC13783_ ## prefix ## _ ## _name] = {				\
 		.desc = {						\
 			.name = #prefix "_" #_name,			\
 			.n_voltages = ARRAY_SIZE(_voltages),		\
 			.ops = &mc13783_gpo_regulator_ops,		\
 			.type = REGULATOR_VOLTAGE,			\
 			.id = MC13783_ ## prefix ## _ ## _name,		\
 			.owner = THIS_MODULE,				\
 		},							\
 		.reg = MC13783_REG_ ## _reg,				\
 		.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN,	\
 		.voltages =  _voltages,					\
 	}

 #define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages)		\
 	MC13783_DEFINE(SW, _name, _reg, _vsel_reg, _voltages)
 #define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages)		\
 	MC13783_DEFINE(REGU, _name, _reg, _vsel_reg, _voltages)

 static struct mc13783_regulator mc13783_regulators[] = {
 	MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),

 	MC13783_FIXED_DEFINE(REGU, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
 	MC13783_FIXED_DEFINE(REGU, VIOHI, REGULATORMODE0, mc13783_viohi_val),
 	MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0,	\
 			    mc13783_violo_val),
 	MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0,	\
 			    mc13783_vdig_val),
 	MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0,	\
 			    mc13783_vgen_val),
 	MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0,	\
 			    mc13783_vrfdig_val),
 	MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0,	\
 			    mc13783_vrfref_val),
 	MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0,	\
 			    mc13783_vrfcp_val),
 	MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0,	\
 			    mc13783_vsim_val),
 	MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0,	\
 			    mc13783_vesim_val),
 	MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0,	\
 			    mc13783_vcam_val),
 	MC13783_FIXED_DEFINE(REGU, VRFBG, REGULATORMODE1, mc13783_vrfbg_val),
 	MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1,	\
 			    mc13783_vvib_val),
 	MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1,	\
 			    mc13783_vrf_val),
 	MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1,	\
 			    mc13783_vrf_val),
 	MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1,	\
 			    mc13783_vmmc_val),
 	MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1,	\
 			    mc13783_vmmc_val),
 	MC13783_GPO_DEFINE(REGU, GPO1, POWERMISC, mc13783_gpo_val),
 	MC13783_GPO_DEFINE(REGU, GPO2, POWERMISC, mc13783_gpo_val),
 	MC13783_GPO_DEFINE(REGU, GPO3, POWERMISC, mc13783_gpo_val),
 	MC13783_GPO_DEFINE(REGU, GPO4, POWERMISC, mc13783_gpo_val),
 	MC13783_GPO_DEFINE(REGU, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val),
 	MC13783_GPO_DEFINE(REGU, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val),
 };

 struct mc13783_regulator_priv {
 	struct mc13783 *mc13783;
 	u32 powermisc_pwgt_state;
 	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 int mc13783_regulator_list_voltage(struct regulator_dev *rdev,
 						unsigned selector)
 {
 	int id = rdev_get_id(rdev);

 	if (selector >= mc13783_regulators[id].desc.n_voltages)
 		return -EINVAL;

 	return mc13783_regulators[id].voltages[selector];
 }

 static int mc13783_get_best_voltage_index(struct regulator_dev *rdev,
 						int min_uV, int max_uV)
 {
 	int reg_id = rdev_get_id(rdev);
 	int i;
 	int bestmatch;
 	int bestindex;

 	/*
 	 * Locate the minimum voltage fitting the criteria on
 	 * this regulator. The switchable voltages are not
 	 * in strict falling order so we need to check them
 	 * all for the best match.
 	 */
 	bestmatch = INT_MAX;
 	bestindex = -1;
 	for (i = 0; i < mc13783_regulators[reg_id].desc.n_voltages; i++) {
 		if (mc13783_regulators[reg_id].voltages[i] >= min_uV &&
 		    mc13783_regulators[reg_id].voltages[i] < bestmatch) {
 			bestmatch = mc13783_regulators[reg_id].voltages[i];
 			bestindex = i;
 		}
 	}

 	if (bestindex < 0 || bestmatch > max_uV) {
 		dev_warn(&rdev->dev, "no possible value for %d<=x<=%d uV\n",
 				min_uV, max_uV);
 		return -EINVAL;
 	}
 	return bestindex;
 }

 static int mc13783_regulator_set_voltage(struct regulator_dev *rdev,
 						int min_uV, int max_uV)
 {
 	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
 	int value, id = rdev_get_id(rdev);
 	int ret;

 	dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
 		__func__, id, min_uV, max_uV);

 	/* Find the best index */
 	value = mc13783_get_best_voltage_index(rdev, min_uV, max_uV);
 	dev_dbg(rdev_get_dev(rdev), "%s best value: %d \n", __func__, value);
 	if (value < 0)
 		return value;

 	mc13783_lock(priv->mc13783);
 	ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].vsel_reg,
 			mc13783_regulators[id].vsel_mask,
 			value << mc13783_regulators[id].vsel_shift);
 	mc13783_unlock(priv->mc13783);

 	return ret;
 }

 static int mc13783_regulator_get_voltage(struct regulator_dev *rdev)
 {
 	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
 	int ret, id = rdev_get_id(rdev);
 	unsigned int val;

 	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

 	mc13783_lock(priv->mc13783);
 	ret = mc13783_reg_read(priv->mc13783,
 				mc13783_regulators[id].vsel_reg, &val);
 	mc13783_unlock(priv->mc13783);

 	if (ret)
 		return ret;

 	val = (val & mc13783_regulators[id].vsel_mask)
 		>> mc13783_regulators[id].vsel_shift;

 	dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);

 	BUG_ON(val < 0 || val > mc13783_regulators[id].desc.n_voltages);

 	return mc13783_regulators[id].voltages[val];
 }

 static struct regulator_ops mc13783_regulator_ops = {
 	.enable = mc13783_regulator_enable,
 	.disable = mc13783_regulator_disable,
 	.is_enabled = mc13783_regulator_is_enabled,
 	.list_voltage = mc13783_regulator_list_voltage,
 	.set_voltage = mc13783_regulator_set_voltage,
 	.get_voltage = mc13783_regulator_get_voltage,
 };

 static int mc13783_fixed_regulator_set_voltage(struct regulator_dev *rdev,
 						int min_uV, int max_uV)
 {
 	int id = rdev_get_id(rdev);

 	dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
 		__func__, id, min_uV, max_uV);

 	if (min_uV >= mc13783_regulators[id].voltages[0] &&
 	    max_uV <= mc13783_regulators[id].voltages[0])
 		return 0;
 	else
 		return -EINVAL;
 }

 static int mc13783_fixed_regulator_get_voltage(struct regulator_dev *rdev)
 {
 	int id = rdev_get_id(rdev);

 	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

 	return mc13783_regulators[id].voltages[0];
 }

 static struct regulator_ops mc13783_fixed_regulator_ops = {
 	.enable = mc13783_regulator_enable,
 	.disable = mc13783_regulator_disable,
 	.is_enabled = mc13783_regulator_is_enabled,
 	.list_voltage = mc13783_regulator_list_voltage,
 	.set_voltage = mc13783_fixed_regulator_set_voltage,
 	.get_voltage = mc13783_fixed_regulator_get_voltage,
 };

 static int mc13783_powermisc_rmw(struct mc13783_regulator_priv *priv, u32 mask,
 				 u32 val)
 {
 	struct mc13783 *mc13783 = priv->mc13783;
 	int ret;
 	u32 valread;

 	BUG_ON(val & ~mask);

 	ret = mc13783_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);
 	if (ret)
 		return ret;

 	/* Update the stored state for Power Gates. */
 	priv->powermisc_pwgt_state =
 				(priv->powermisc_pwgt_state & ~mask) | val;
 	priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M;

 	/* Construct the new register value */
 	valread = (valread & ~mask) | val;
 	/* Overwrite the PWGTxEN with the stored version */
 	valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
 						priv->powermisc_pwgt_state;

 	return mc13783_reg_write(mc13783, MC13783_REG_POWERMISC, valread);
 }

 static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
 {
 	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
 	int id = rdev_get_id(rdev);
 	int ret;
 	u32 en_val = mc13783_regulators[id].enable_bit;

 	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

 	/* Power Gate enable value is 0 */
 	if (id == MC13783_REGU_PWGT1SPI ||
 	    id == MC13783_REGU_PWGT2SPI)
 		en_val = 0;

 	mc13783_lock(priv->mc13783);
 	ret = mc13783_powermisc_rmw(priv, mc13783_regulators[id].enable_bit,
 					en_val);
 	mc13783_unlock(priv->mc13783);

 	return ret;
 }

 static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
 {
 	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
 	int id = rdev_get_id(rdev);
 	int ret;
 	u32 dis_val = 0;

 	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

 	/* Power Gate disable value is 1 */
 	if (id == MC13783_REGU_PWGT1SPI ||
 	    id == MC13783_REGU_PWGT2SPI)
 		dis_val = mc13783_regulators[id].enable_bit;

 	mc13783_lock(priv->mc13783);
 	ret = mc13783_powermisc_rmw(priv, mc13783_regulators[id].enable_bit,
 					dis_val);
 	mc13783_unlock(priv->mc13783);

 	return ret;
 }

 static int mc13783_gpo_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;

 	/* Power Gates state is stored in powermisc_pwgt_state
 	 * where the meaning of bits is negated */
 	val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
 	      (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);

 	return (val & mc13783_regulators[id].enable_bit) != 0;
 }

 static struct regulator_ops mc13783_gpo_regulator_ops = {
 	.enable = mc13783_gpo_regulator_enable,
 	.disable = mc13783_gpo_regulator_disable,
 	.is_enabled = mc13783_gpo_regulator_is_enabled,
 	.list_voltage = mc13783_regulator_list_voltage,
 	.set_voltage = mc13783_fixed_regulator_set_voltage,
 	.get_voltage = mc13783_fixed_regulator_get_voltage,
 };

 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;

 	platform_set_drvdata(pdev, NULL);

 	for (i = 0; i < pdata->num_regulators; i++)
 		regulator_unregister(priv->regulators[i]);

 	kfree(priv);
 	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");
	/*
	* Regulator Driver for Freescale MC13783 PMIC
	*
	* Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
	* Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.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/mfd/mc13783.h>
	#include <linux/regulator/machine.h>
	#include <linux/regulator/driver.h>
	#include <linux/platform_device.h>
	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/init.h>
	#include <linux/err.h>

	#define MC13783_REG_SWITCHERS5 29
	#define MC13783_REG_SWITCHERS5_SW3EN (1 << 20)
	#define MC13783_REG_SWITCHERS5_SW3VSEL 18
	#define MC13783_REG_SWITCHERS5_SW3VSEL_M (3 << 18)

	#define MC13783_REG_REGULATORSETTING0 30
	#define MC13783_REG_REGULATORSETTING0_VIOLOVSEL 2
	#define MC13783_REG_REGULATORSETTING0_VDIGVSEL 4
	#define MC13783_REG_REGULATORSETTING0_VGENVSEL 6
	#define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL 9
	#define MC13783_REG_REGULATORSETTING0_VRFREFVSEL 11
	#define MC13783_REG_REGULATORSETTING0_VRFCPVSEL 13
	#define MC13783_REG_REGULATORSETTING0_VSIMVSEL 14
	#define MC13783_REG_REGULATORSETTING0_VESIMVSEL 15
	#define MC13783_REG_REGULATORSETTING0_VCAMVSEL 16

	#define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M (3 << 2)
	#define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M (3 << 4)
	#define MC13783_REG_REGULATORSETTING0_VGENVSEL_M (7 << 6)
	#define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M (3 << 9)
	#define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M (3 << 11)
	#define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M (1 << 13)
	#define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M (1 << 14)
	#define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M (1 << 15)
	#define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M (7 << 16)

	#define MC13783_REG_REGULATORSETTING1 31
	#define MC13783_REG_REGULATORSETTING1_VVIBVSEL 0
	#define MC13783_REG_REGULATORSETTING1_VRF1VSEL 2
	#define MC13783_REG_REGULATORSETTING1_VRF2VSEL 4
	#define MC13783_REG_REGULATORSETTING1_VMMC1VSEL 6
	#define MC13783_REG_REGULATORSETTING1_VMMC2VSEL 9

	#define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M (3 << 0)
	#define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M (3 << 2)
	#define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M (3 << 4)
	#define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M (7 << 6)
	#define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M (7 << 9)

	#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)
	#define MC13783_REG_POWERMISC_PWGT1SPIEN (1 << 15)
	#define MC13783_REG_POWERMISC_PWGT2SPIEN (1 << 16)

	#define MC13783_REG_POWERMISC_PWGTSPI_M (3 << 15)


	struct mc13783_regulator {
	struct regulator_desc desc;
	int reg;
	int enable_bit;
	int vsel_reg;
	int vsel_shift;
	int vsel_mask;
	int const *voltages;
	};

	/* Voltage Values */
	static const int const mc13783_sw3_val[] = {
	5000000, 5000000, 5000000, 5500000,
	};

	static const int const mc13783_vaudio_val[] = {
	2775000,
	};

	static const int const mc13783_viohi_val[] = {
	2775000,
	};

	static const int const mc13783_violo_val[] = {
	1200000, 1300000, 1500000, 1800000,
	};

	static const int const mc13783_vdig_val[] = {
	1200000, 1300000, 1500000, 1800000,
	};

	static const int const mc13783_vgen_val[] = {
	1200000, 1300000, 1500000, 1800000,
	1100000, 2000000, 2775000, 2400000,
	};

	static const int const mc13783_vrfdig_val[] = {
	1200000, 1500000, 1800000, 1875000,
	};

	static const int const mc13783_vrfref_val[] = {
	2475000, 2600000, 2700000, 2775000,
	};

	static const int const mc13783_vrfcp_val[] = {
	2700000, 2775000,
	};

	static const int const mc13783_vsim_val[] = {
	1800000, 2900000, 3000000,
	};

	static const int const mc13783_vesim_val[] = {
	1800000, 2900000,
	};

	static const int const mc13783_vcam_val[] = {
	1500000, 1800000, 2500000, 2550000,
	2600000, 2750000, 2800000, 3000000,
	};

	static const int const mc13783_vrfbg_val[] = {
	1250000,
	};

	static const int const mc13783_vvib_val[] = {
	1300000, 1800000, 2000000, 3000000,
	};

	static const int const mc13783_vmmc_val[] = {
	1600000, 1800000, 2000000, 2600000,
	2700000, 2800000, 2900000, 3000000,
	};

	static const int const mc13783_vrf_val[] = {
	1500000, 1875000, 2700000, 2775000,
	};

	static const int const mc13783_gpo_val[] = {
	3100000,
	};

	static const int const mc13783_pwgtdrv_val[] = {
	5500000,
	};

	static struct regulator_ops mc13783_regulator_ops;
	static struct regulator_ops mc13783_fixed_regulator_ops;
	static struct regulator_ops mc13783_gpo_regulator_ops;

	#define MC13783_DEFINE(prefix, _name, _reg, _vsel_reg, _voltages) \
	[MC13783_ ## prefix ## _ ## _name] = { \
	.desc = { \
	.name = #prefix "_" #_name, \
	.n_voltages = ARRAY_SIZE(_voltages), \
	.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, \
	.vsel_reg = MC13783_REG_ ## _vsel_reg, \
	.vsel_shift = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL,\
	.vsel_mask = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL_M,\
	.voltages = _voltages, \
	}

	#define MC13783_FIXED_DEFINE(prefix, _name, _reg, _voltages) \
	[MC13783_ ## prefix ## _ ## _name] = { \
	.desc = { \
	.name = #prefix "_" #_name, \
	.n_voltages = ARRAY_SIZE(_voltages), \
	.ops = &mc13783_fixed_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = MC13783_ ## prefix ## _ ## _name, \
	.owner = THIS_MODULE, \
	}, \
	.reg = MC13783_REG_ ## _reg, \
	.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
	.voltages = _voltages, \
	}

	#define MC13783_GPO_DEFINE(prefix, _name, _reg, _voltages) \
	[MC13783_ ## prefix ## _ ## _name] = { \
	.desc = { \
	.name = #prefix "_" #_name, \
	.n_voltages = ARRAY_SIZE(_voltages), \
	.ops = &mc13783_gpo_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = MC13783_ ## prefix ## _ ## _name, \
	.owner = THIS_MODULE, \
	}, \
	.reg = MC13783_REG_ ## _reg, \
	.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
	.voltages = _voltages, \
	}

	#define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages) \
	MC13783_DEFINE(SW, _name, _reg, _vsel_reg, _voltages)
	#define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages) \
	MC13783_DEFINE(REGU, _name, _reg, _vsel_reg, _voltages)

	static struct mc13783_regulator mc13783_regulators[] = {
	MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),

	MC13783_FIXED_DEFINE(REGU, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
	MC13783_FIXED_DEFINE(REGU, VIOHI, REGULATORMODE0, mc13783_viohi_val),
	MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0, \
	mc13783_violo_val),
	MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0, \
	mc13783_vdig_val),
	MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0, \
	mc13783_vgen_val),
	MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0, \
	mc13783_vrfdig_val),
	MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0, \
	mc13783_vrfref_val),
	MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0, \
	mc13783_vrfcp_val),
	MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0, \
	mc13783_vsim_val),
	MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0, \
	mc13783_vesim_val),
	MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0, \
	mc13783_vcam_val),
	MC13783_FIXED_DEFINE(REGU, VRFBG, REGULATORMODE1, mc13783_vrfbg_val),
	MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1, \
	mc13783_vvib_val),
	MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1, \
	mc13783_vrf_val),
	MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1, \
	mc13783_vrf_val),
	MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1, \
	mc13783_vmmc_val),
	MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1, \
	mc13783_vmmc_val),
	MC13783_GPO_DEFINE(REGU, GPO1, POWERMISC, mc13783_gpo_val),
	MC13783_GPO_DEFINE(REGU, GPO2, POWERMISC, mc13783_gpo_val),
	MC13783_GPO_DEFINE(REGU, GPO3, POWERMISC, mc13783_gpo_val),
	MC13783_GPO_DEFINE(REGU, GPO4, POWERMISC, mc13783_gpo_val),
	MC13783_GPO_DEFINE(REGU, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val),
	MC13783_GPO_DEFINE(REGU, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val),
	};

	struct mc13783_regulator_priv {
	struct mc13783 *mc13783;
	u32 powermisc_pwgt_state;
	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 int mc13783_regulator_list_voltage(struct regulator_dev *rdev,
	unsigned selector)
	{
	int id = rdev_get_id(rdev);

	if (selector >= mc13783_regulators[id].desc.n_voltages)
	return -EINVAL;

	return mc13783_regulators[id].voltages[selector];
	}

	static int mc13783_get_best_voltage_index(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	int reg_id = rdev_get_id(rdev);
	int i;
	int bestmatch;
	int bestindex;

	/*
	* Locate the minimum voltage fitting the criteria on
	* this regulator. The switchable voltages are not
	* in strict falling order so we need to check them
	* all for the best match.
	*/
	bestmatch = INT_MAX;
	bestindex = -1;
	for (i = 0; i < mc13783_regulators[reg_id].desc.n_voltages; i++) {
	if (mc13783_regulators[reg_id].voltages[i] >= min_uV &&
	mc13783_regulators[reg_id].voltages[i] < bestmatch) {
	bestmatch = mc13783_regulators[reg_id].voltages[i];
	bestindex = i;
	}
	}

	if (bestindex < 0 \|\| bestmatch > max_uV) {
	dev_warn(&rdev->dev, "no possible value for %d<=x<=%d uV\n",
	min_uV, max_uV);
	return -EINVAL;
	}
	return bestindex;
	}

	static int mc13783_regulator_set_voltage(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int value, id = rdev_get_id(rdev);
	int ret;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
	__func__, id, min_uV, max_uV);

	/* Find the best index */
	value = mc13783_get_best_voltage_index(rdev, min_uV, max_uV);
	dev_dbg(rdev_get_dev(rdev), "%s best value: %d \n", __func__, value);
	if (value < 0)
	return value;

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].vsel_reg,
	mc13783_regulators[id].vsel_mask,
	value << mc13783_regulators[id].vsel_shift);
	mc13783_unlock(priv->mc13783);

	return ret;
	}

	static int mc13783_regulator_get_voltage(struct regulator_dev *rdev)
	{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int ret, id = rdev_get_id(rdev);
	unsigned int val;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_read(priv->mc13783,
	mc13783_regulators[id].vsel_reg, &val);
	mc13783_unlock(priv->mc13783);

	if (ret)
	return ret;

	val = (val & mc13783_regulators[id].vsel_mask)
	>> mc13783_regulators[id].vsel_shift;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);

	BUG_ON(val < 0 \|\| val > mc13783_regulators[id].desc.n_voltages);

	return mc13783_regulators[id].voltages[val];
	}

	static struct regulator_ops mc13783_regulator_ops = {
	.enable = mc13783_regulator_enable,
	.disable = mc13783_regulator_disable,
	.is_enabled = mc13783_regulator_is_enabled,
	.list_voltage = mc13783_regulator_list_voltage,
	.set_voltage = mc13783_regulator_set_voltage,
	.get_voltage = mc13783_regulator_get_voltage,
	};

	static int mc13783_fixed_regulator_set_voltage(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	int id = rdev_get_id(rdev);

	dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
	__func__, id, min_uV, max_uV);

	if (min_uV >= mc13783_regulators[id].voltages[0] &&
	max_uV <= mc13783_regulators[id].voltages[0])
	return 0;
	else
	return -EINVAL;
	}

	static int mc13783_fixed_regulator_get_voltage(struct regulator_dev *rdev)
	{
	int id = rdev_get_id(rdev);

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	return mc13783_regulators[id].voltages[0];
	}

	static struct regulator_ops mc13783_fixed_regulator_ops = {
	.enable = mc13783_regulator_enable,
	.disable = mc13783_regulator_disable,
	.is_enabled = mc13783_regulator_is_enabled,
	.list_voltage = mc13783_regulator_list_voltage,
	.set_voltage = mc13783_fixed_regulator_set_voltage,
	.get_voltage = mc13783_fixed_regulator_get_voltage,
	};

	static int mc13783_powermisc_rmw(struct mc13783_regulator_priv *priv, u32 mask,
	u32 val)
	{
	struct mc13783 *mc13783 = priv->mc13783;
	int ret;
	u32 valread;

	BUG_ON(val & ~mask);

	ret = mc13783_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);
	if (ret)
	return ret;

	/* Update the stored state for Power Gates. */
	priv->powermisc_pwgt_state =
	(priv->powermisc_pwgt_state & ~mask) \| val;
	priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M;

	/* Construct the new register value */
	valread = (valread & ~mask) \| val;
	/* Overwrite the PWGTxEN with the stored version */
	valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) \|
	priv->powermisc_pwgt_state;

	return mc13783_reg_write(mc13783, MC13783_REG_POWERMISC, valread);
	}

	static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
	{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	int ret;
	u32 en_val = mc13783_regulators[id].enable_bit;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	/* Power Gate enable value is 0 */
	if (id == MC13783_REGU_PWGT1SPI \|\|
	id == MC13783_REGU_PWGT2SPI)
	en_val = 0;

	mc13783_lock(priv->mc13783);
	ret = mc13783_powermisc_rmw(priv, mc13783_regulators[id].enable_bit,
	en_val);
	mc13783_unlock(priv->mc13783);

	return ret;
	}

	static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
	{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	int ret;
	u32 dis_val = 0;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	/* Power Gate disable value is 1 */
	if (id == MC13783_REGU_PWGT1SPI \|\|
	id == MC13783_REGU_PWGT2SPI)
	dis_val = mc13783_regulators[id].enable_bit;

	mc13783_lock(priv->mc13783);
	ret = mc13783_powermisc_rmw(priv, mc13783_regulators[id].enable_bit,
	dis_val);
	mc13783_unlock(priv->mc13783);

	return ret;
	}

	static int mc13783_gpo_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;

	/* Power Gates state is stored in powermisc_pwgt_state
	* where the meaning of bits is negated */
	val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) \|
	(priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);

	return (val & mc13783_regulators[id].enable_bit) != 0;
	}

	static struct regulator_ops mc13783_gpo_regulator_ops = {
	.enable = mc13783_gpo_regulator_enable,
	.disable = mc13783_gpo_regulator_disable,
	.is_enabled = mc13783_gpo_regulator_is_enabled,
	.list_voltage = mc13783_regulator_list_voltage,
	.set_voltage = mc13783_fixed_regulator_set_voltage,
	.get_voltage = mc13783_fixed_regulator_get_voltage,
	};

	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;

	platform_set_drvdata(pdev, NULL);

	for (i = 0; i < pdata->num_regulators; i++)
	regulator_unregister(priv->regulators[i]);

	kfree(priv);
	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");