[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / regulator / ab8500-ext.c

/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * License Terms: GNU General Public License v2
 *
 * Authors: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
 *
 * This file is based on drivers/regulator/ab8500.c
 *
 * AB8500 external regulators
 *
 * ab8500-ext supports the following regulators:
 * - VextSupply3
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/regulator/ab8500.h>

/**
 * struct ab8500_ext_regulator_info - ab8500 regulator information
 * @dev: device pointer
 * @desc: regulator description
 * @rdev: regulator device
 * @is_enabled: status of regulator (on/off)
 * @update_bank: bank to control on/off
 * @update_reg: register to control on/off
 * @update_mask: mask to enable/disable and set mode of regulator
 * @update_val: bits holding the regulator current mode
 * @update_val_en: bits to set EN pin active (LPn pin deactive)
 *                 normally this means high power mode
 * @update_val_en_lp: bits to set EN pin active and LPn pin active
 *                    normally this means low power mode
 * @delay: startup delay in ms
 */
struct ab8500_ext_regulator_info {
	struct device *dev;
	struct regulator_desc desc;
	struct regulator_dev *rdev;
	bool is_enabled;
	u8 update_bank;
	u8 update_reg;
	u8 update_mask;
	u8 update_val;
	u8 update_val_en;
	u8 update_val_en_lp;
};

static int ab8500_ext_regulator_enable(struct regulator_dev *rdev)
{
	int ret;
	struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);

	if (info == NULL) {
		dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
		return -EINVAL;
	}

	ret = abx500_mask_and_set_register_interruptible(info->dev,
		info->update_bank, info->update_reg,
		info->update_mask, info->update_val);
	if (ret < 0)
		dev_err(rdev_get_dev(info->rdev),
			"couldn't set enable bits for regulator\n");

	info->is_enabled = true;

	dev_dbg(rdev_get_dev(rdev), "%s-enable (bank, reg, mask, value):"
		" 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
		info->desc.name, info->update_bank, info->update_reg,
		info->update_mask, info->update_val);

	return ret;
}

static int ab8500_ext_regulator_disable(struct regulator_dev *rdev)
{
	int ret;
	struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);

	if (info == NULL) {
		dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
		return -EINVAL;
	}

	ret = abx500_mask_and_set_register_interruptible(info->dev,
		info->update_bank, info->update_reg,
		info->update_mask, 0x0);
	if (ret < 0)
		dev_err(rdev_get_dev(info->rdev),
			"couldn't set disable bits for regulator\n");

	info->is_enabled = false;

	dev_dbg(rdev_get_dev(rdev), "%s-disable (bank, reg, mask, value):"
		" 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
		info->desc.name, info->update_bank, info->update_reg,
		info->update_mask, 0x0);

	return ret;
}

static int ab8500_ext_regulator_is_enabled(struct regulator_dev *rdev)
{
	int ret;
	struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
	u8 regval;

	if (info == NULL) {
		dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
		return -EINVAL;
	}

	ret = abx500_get_register_interruptible(info->dev,
		info->update_bank, info->update_reg, &regval);
	if (ret < 0) {
		dev_err(rdev_get_dev(rdev),
			"couldn't read 0x%x register\n", info->update_reg);
		return ret;
	}

	dev_dbg(rdev_get_dev(rdev), "%s-is_enabled (bank, reg, mask, value):"
		" 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
		info->desc.name, info->update_bank, info->update_reg,
		info->update_mask, regval);

	if (regval & info->update_mask)
		info->is_enabled = true;
	else
		info->is_enabled = false;

	return info->is_enabled;
}

static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
					 unsigned int mode)
{
	int ret = 0;
	struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);

	if (info == NULL) {
		dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
		return -EINVAL;
	}

	switch (mode) {
	case REGULATOR_MODE_NORMAL:
		info->update_val = info->update_val_hp;
		break;
	case REGULATOR_MODE_IDLE:
		info->update_val = info->update_val_lp;
		break;

	default:
		return -EINVAL;
	}

	if (info->is_enabled) {
		u8 regval;

		ret = enable(info, &regval);
		if (ret < 0)
			dev_err(rdev_get_dev(rdev),
				"Could not set regulator mode.\n");

		dev_dbg(rdev_get_dev(rdev),
			"%s-set_mode (bank, reg, mask, value): "
			"0x%x, 0x%x, 0x%x, 0x%x\n",
			info->desc.name, info->update_bank, info->update_reg,
			info->update_mask, regval);
	}

	return ret;
}

static unsigned int ab8500_ext_regulator_get_mode(struct regulator_dev *rdev)
{
	struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
	int ret;

	if (info == NULL) {
		dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
		return -EINVAL;
	}

	if (info->update_val == info->update_val_hp)
		ret = REGULATOR_MODE_NORMAL;
	else if (info->update_val == info->update_val_lp)
		ret = REGULATOR_MODE_IDLE;
	else
		ret = -EINVAL;

	return ret;
}

static int ab8500_ext_fixed_get_voltage(struct regulator_dev *rdev)
{
	struct regulation_constraints *regu_constraints = rdev->constraints;

	if (regu_constraints == NULL) {
		dev_err(rdev_get_dev(rdev), "regulator constraints null pointer\n");
		return -EINVAL;
	}
	if (regu_constraints->min_uV && regu_constraints->max_uV) {
		if (regu_constraints->min_uV == regu_constraints->max_uV)
			return regu_constraints->min_uV;
	}
	return -EINVAL;
}

static int ab8500_ext_list_voltage(struct regulator_dev *rdev,
				   unsigned selector)
{
	struct regulation_constraints *regu_constraints = rdev->constraints;

	if (regu_constraints == NULL) {
		dev_err(rdev_get_dev(rdev), "regulator constraints null pointer\n");
		return -EINVAL;
	}
	/* return the uV for the fixed regulators */
	if (regu_constraints->min_uV && regu_constraints->max_uV) {
		if (regu_constraints->min_uV == regu_constraints->max_uV)
			return regu_constraints->min_uV;
	}
	return -EINVAL;
}

static struct regulator_ops ab8500_ext_regulator_ops = {
	.enable			= ab8500_ext_regulator_enable,
	.disable		= ab8500_ext_regulator_disable,
	.is_enabled		= ab8500_ext_regulator_is_enabled,
	.set_mode		= ab8500_ext_regulator_set_mode,
	.get_mode		= ab8500_ext_regulator_get_mode,
	.get_voltage		= ab8500_ext_fixed_get_voltage,
	.list_voltage		= ab8500_ext_list_voltage,
};


static struct ab8500_ext_regulator_info
		ab8500_ext_regulator_info[AB8500_NUM_EXT_REGULATORS] = {
	[AB8500_EXT_SUPPLY1] = {
		.desc = {
			.name		= "VEXTSUPPLY1",
			.ops		= &ab8500_ext_regulator_ops,
			.type		= REGULATOR_VOLTAGE,
			.id		= AB8500_EXT_SUPPLY1,
			.owner		= THIS_MODULE,
			.n_voltages	= 1,
		},
		.update_bank		= 0x04,
		.update_reg		= 0x08,
		.update_mask		= 0x03,
		.update_val		= 0x01,
		.update_val_hp		= 0x01,
		.update_val_lp		= 0x03,
		.update_val_hw		= 0x02,
	},
	[AB8500_EXT_SUPPLY2] = {
		.desc = {
			.name		= "VEXTSUPPLY2",
			.ops		= &ab8500_ext_regulator_ops,
			.type		= REGULATOR_VOLTAGE,
			.id		= AB8500_EXT_SUPPLY2,
			.owner		= THIS_MODULE,
			.n_voltages	= 1,
		},
		.update_bank		= 0x04,
		.update_reg		= 0x08,
		.update_mask		= 0x0c,
		.update_val		= 0x04,
		.update_val_hp		= 0x04,
		.update_val_lp		= 0x0c,
		.update_val_hw		= 0x08,
	},
	[AB8500_EXT_SUPPLY3] = {
		.desc = {
			.name		= "VEXTSUPPLY3",
			.ops		= &ab8500_ext_regulator_ops,
			.type		= REGULATOR_VOLTAGE,
			.id		= AB8500_EXT_SUPPLY3,
			.owner		= THIS_MODULE,
			.n_voltages	= 1,
		},
		.update_bank		= 0x04,
		.update_reg		= 0x08,
		.update_mask		= 0x30,
		.update_val		= 0x10,
		.update_val_en		= 0x10,
		.update_val_en_lp	= 0x30,
	},
};

int ab8500_ext_regulator_init(struct platform_device *pdev)
{
	struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
	struct ab8500_platform_data *ppdata;
	struct ab8500_regulator_platform_data *pdata;
	struct regulator_config config = { };
	int i, err;

	if (!ab8500) {
		dev_err(&pdev->dev, "null mfd parent\n");
		return -EINVAL;
	}
	ppdata = dev_get_platdata(ab8500->dev);
	if (!ppdata) {
		dev_err(&pdev->dev, "null parent pdata\n");
		return -EINVAL;
	}

	pdata = ppdata->regulator;
	if (!pdata) {
		dev_err(&pdev->dev, "null pdata\n");
		return -EINVAL;
	}

	/* make sure the platform data has the correct size */
	if (pdata->num_ext_regulator != ARRAY_SIZE(ab8500_ext_regulator_info)) {
		dev_err(&pdev->dev, "Configuration error: size mismatch.\n");
		return -EINVAL;
	}

	/* check for AB8500 2.x */
	if (abx500_get_chip_id(&pdev->dev) < 0x30) {
		struct ab8500_ext_regulator_info *info;

		/* VextSupply3LPn is inverted on AB8500 2.x */
		info = &ab8500_ext_regulator_info[AB8500_EXT_SUPPLY3];
		info->update_val = 0x30;
		info->update_val_en = 0x30;
		info->update_val_en_lp = 0x10;
	}

	/* register all regulators */
	for (i = 0; i < ARRAY_SIZE(ab8500_ext_regulator_info); i++) {
		struct ab8500_ext_regulator_info *info = NULL;

		/* assign per-regulator data */
		info = &ab8500_ext_regulator_info[i];
		info->dev = &pdev->dev;

		config.dev = &pdev->dev;
		config.init_data = &pdata->ext_regulator[i];
		config.driver_data = info;

		/* register regulator with framework */
		info->rdev = regulator_register(&info->desc, &config);

		if (IS_ERR(info->rdev)) {
			err = PTR_ERR(info->rdev);
			dev_err(&pdev->dev, "failed to register regulator %s\n",
					info->desc.name);
			/* when we fail, un-register all earlier regulators */
			while (--i >= 0) {
				info = &ab8500_ext_regulator_info[i];
				regulator_unregister(info->rdev);
			}
			return err;
		}

		dev_dbg(rdev_get_dev(info->rdev),
			"%s-probed\n", info->desc.name);
	}

	return 0;
}

int ab8500_ext_regulator_exit(struct platform_device *pdev)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(ab8500_ext_regulator_info); i++) {
		struct ab8500_ext_regulator_info *info = NULL;
		info = &ab8500_ext_regulator_info[i];

		dev_vdbg(rdev_get_dev(info->rdev),
			"%s-remove\n", info->desc.name);

		regulator_unregister(info->rdev);
	}

	return 0;
}

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Bengt Jonsson <bengt.g.jonsson@stericsson.com>");
MODULE_DESCRIPTION("AB8500 external regulator driver");
MODULE_ALIAS("platform:ab8500-ext-regulator");
Commit	Line	Data
d1a82001 LJ	1	/*
	2	* Copyright (C) ST-Ericsson SA 2010
	3	*
	4	* License Terms: GNU General Public License v2
	5	*
	6	* Authors: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
	7	*
	8	* This file is based on drivers/regulator/ab8500.c
	9	*
	10	* AB8500 external regulators
	11	*
	12	* ab8500-ext supports the following regulators:
	13	* - VextSupply3
	14	*/
	15	#include <linux/init.h>
	16	#include <linux/kernel.h>
	17	#include <linux/err.h>
	18	#include <linux/module.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/regulator/driver.h>
	21	#include <linux/regulator/machine.h>
	22	#include <linux/mfd/abx500.h>
	23	#include <linux/mfd/abx500/ab8500.h>
	24	#include <linux/regulator/ab8500.h>
	25
	26	/**
	27	* struct ab8500_ext_regulator_info - ab8500 regulator information
	28	* @dev: device pointer
	29	* @desc: regulator description
	30	* @rdev: regulator device
	31	* @is_enabled: status of regulator (on/off)
	32	* @update_bank: bank to control on/off
	33	* @update_reg: register to control on/off
	34	* @update_mask: mask to enable/disable and set mode of regulator
	35	* @update_val: bits holding the regulator current mode
	36	* @update_val_en: bits to set EN pin active (LPn pin deactive)
	37	* normally this means high power mode
	38	* @update_val_en_lp: bits to set EN pin active and LPn pin active
	39	* normally this means low power mode
	40	* @delay: startup delay in ms
	41	*/
	42	struct ab8500_ext_regulator_info {
	43	struct device *dev;
	44	struct regulator_desc desc;
	45	struct regulator_dev *rdev;
	46	bool is_enabled;
	47	u8 update_bank;
	48	u8 update_reg;
	49	u8 update_mask;
	50	u8 update_val;
	51	u8 update_val_en;
	52	u8 update_val_en_lp;
	53	};
	54
	55	static int ab8500_ext_regulator_enable(struct regulator_dev *rdev)
	56	{
	57	int ret;
	58	struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
	59
	60	if (info == NULL) {
	61	dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
	62	return -EINVAL;
	63	}
	64
65	ret = abx500_mask_and_set_register_interruptible(info->dev,
66	info->update_bank, info->update_reg,
67	info->update_mask, info->update_val);
68	if (ret < 0)
69	dev_err(rdev_get_dev(info->rdev),
70	"couldn't set enable bits for regulator\n");
71
72	info->is_enabled = true;
73
74	dev_dbg(rdev_get_dev(rdev), "%s-enable (bank, reg, mask, value):"
75	" 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
76	info->desc.name, info->update_bank, info->update_reg,
77	info->update_mask, info->update_val);
78
79	return ret;
80	}
81
82	static int ab8500_ext_regulator_disable(struct regulator_dev *rdev)
83	{
84	int ret;
85	struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
86
87	if (info == NULL) {
88	dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
89	return -EINVAL;
90	}
91
92	ret = abx500_mask_and_set_register_interruptible(info->dev,
93	info->update_bank, info->update_reg,
94	info->update_mask, 0x0);
95	if (ret < 0)
96	dev_err(rdev_get_dev(info->rdev),
97	"couldn't set disable bits for regulator\n");
98
99	info->is_enabled = false;
100
101	dev_dbg(rdev_get_dev(rdev), "%s-disable (bank, reg, mask, value):"
102	" 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
103	info->desc.name, info->update_bank, info->update_reg,
104	info->update_mask, 0x0);
105
106	return ret;
107	}
108
109	static int ab8500_ext_regulator_is_enabled(struct regulator_dev *rdev)
110	{
111	int ret;
112	struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
113	u8 regval;
114
115	if (info == NULL) {
116	dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
117	return -EINVAL;
118	}
119
120	ret = abx500_get_register_interruptible(info->dev,
121	info->update_bank, info->update_reg, &regval);
122	if (ret < 0) {
123	dev_err(rdev_get_dev(rdev),
124	"couldn't read 0x%x register\n", info->update_reg);
125	return ret;
126	}
127
128	dev_dbg(rdev_get_dev(rdev), "%s-is_enabled (bank, reg, mask, value):"
129	" 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
130	info->desc.name, info->update_bank, info->update_reg,
131	info->update_mask, regval);
132
133	if (regval & info->update_mask)
134	info->is_enabled = true;
135	else
136	info->is_enabled = false;
137
138	return info->is_enabled;
139	}
140
141	static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
142	unsigned int mode)
143	{
144	int ret = 0;
145	struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
146
147	if (info == NULL) {
148	dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
149	return -EINVAL;
150	}
151
152	switch (mode) {
153	case REGULATOR_MODE_NORMAL:
154	info->update_val = info->update_val_hp;
155	break;
156	case REGULATOR_MODE_IDLE:
157	info->update_val = info->update_val_lp;
158	break;
159
160	default:
161	return -EINVAL;
162	}
163
164	if (info->is_enabled) {
165	u8 regval;
166
167	ret = enable(info, &regval);
168	if (ret < 0)
169	dev_err(rdev_get_dev(rdev),
170	"Could not set regulator mode.\n");
171
172	dev_dbg(rdev_get_dev(rdev),
173	"%s-set_mode (bank, reg, mask, value): "
174	"0x%x, 0x%x, 0x%x, 0x%x\n",
175	info->desc.name, info->update_bank, info->update_reg,
176	info->update_mask, regval);
177	}
178
179	return ret;
180	}
181
182	static unsigned int ab8500_ext_regulator_get_mode(struct regulator_dev *rdev)
183	{
184	struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
185	int ret;
186
187	if (info == NULL) {
188	dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
189	return -EINVAL;
190	}
191
192	if (info->update_val == info->update_val_hp)
193	ret = REGULATOR_MODE_NORMAL;
194	else if (info->update_val == info->update_val_lp)
195	ret = REGULATOR_MODE_IDLE;
196	else
197	ret = -EINVAL;
198
199	return ret;
200	}
201
202	static int ab8500_ext_fixed_get_voltage(struct regulator_dev *rdev)
203	{
204	struct regulation_constraints *regu_constraints = rdev->constraints;
205
206	if (regu_constraints == NULL) {
207	dev_err(rdev_get_dev(rdev), "regulator constraints null pointer\n");
208	return -EINVAL;
209	}
210	if (regu_constraints->min_uV && regu_constraints->max_uV) {
211	if (regu_constraints->min_uV == regu_constraints->max_uV)
212	return regu_constraints->min_uV;
213	}
214	return -EINVAL;
215	}
216
217	static int ab8500_ext_list_voltage(struct regulator_dev *rdev,
218	unsigned selector)
219	{
220	struct regulation_constraints *regu_constraints = rdev->constraints;
221
222	if (regu_constraints == NULL) {
223	dev_err(rdev_get_dev(rdev), "regulator constraints null pointer\n");
224	return -EINVAL;
225	}
226	/* return the uV for the fixed regulators */
227	if (regu_constraints->min_uV && regu_constraints->max_uV) {
228	if (regu_constraints->min_uV == regu_constraints->max_uV)
229	return regu_constraints->min_uV;
230	}
231	return -EINVAL;
232	}
233
234	static struct regulator_ops ab8500_ext_regulator_ops = {
235	.enable = ab8500_ext_regulator_enable,
236	.disable = ab8500_ext_regulator_disable,
237	.is_enabled = ab8500_ext_regulator_is_enabled,
238	.set_mode = ab8500_ext_regulator_set_mode,
239	.get_mode = ab8500_ext_regulator_get_mode,
240	.get_voltage = ab8500_ext_fixed_get_voltage,
241	.list_voltage = ab8500_ext_list_voltage,
242	};
243
244
245	static struct ab8500_ext_regulator_info
246	ab8500_ext_regulator_info[AB8500_NUM_EXT_REGULATORS] = {
247	[AB8500_EXT_SUPPLY1] = {
248	.desc = {
249	.name = "VEXTSUPPLY1",
250	.ops = &ab8500_ext_regulator_ops,
251	.type = REGULATOR_VOLTAGE,
252	.id = AB8500_EXT_SUPPLY1,
253	.owner = THIS_MODULE,
254	.n_voltages = 1,
255	},
256	.update_bank = 0x04,
257	.update_reg = 0x08,
258	.update_mask = 0x03,
259	.update_val = 0x01,
260	.update_val_hp = 0x01,
261	.update_val_lp = 0x03,
262	.update_val_hw = 0x02,
263	},
264	[AB8500_EXT_SUPPLY2] = {
265	.desc = {
266	.name = "VEXTSUPPLY2",
267	.ops = &ab8500_ext_regulator_ops,
268	.type = REGULATOR_VOLTAGE,
269	.id = AB8500_EXT_SUPPLY2,
270	.owner = THIS_MODULE,
271	.n_voltages = 1,
272	},
273	.update_bank = 0x04,
274	.update_reg = 0x08,
275	.update_mask = 0x0c,
276	.update_val = 0x04,
277	.update_val_hp = 0x04,
278	.update_val_lp = 0x0c,
279	.update_val_hw = 0x08,
280	},
281	[AB8500_EXT_SUPPLY3] = {
282	.desc = {
283	.name = "VEXTSUPPLY3",
284	.ops = &ab8500_ext_regulator_ops,
285	.type = REGULATOR_VOLTAGE,
286	.id = AB8500_EXT_SUPPLY3,
287	.owner = THIS_MODULE,
288	.n_voltages = 1,
289	},
290	.update_bank = 0x04,
291	.update_reg = 0x08,
292	.update_mask = 0x30,
293	.update_val = 0x10,
294	.update_val_en = 0x10,
295	.update_val_en_lp = 0x30,
296	},
297	};
298
299	int ab8500_ext_regulator_init(struct platform_device *pdev)
300	{
301	struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
302	struct ab8500_platform_data *ppdata;
303	struct ab8500_regulator_platform_data *pdata;
304	struct regulator_config config = { };
305	int i, err;
306
307	if (!ab8500) {
308	dev_err(&pdev->dev, "null mfd parent\n");
309	return -EINVAL;
310	}
311	ppdata = dev_get_platdata(ab8500->dev);
312	if (!ppdata) {
313	dev_err(&pdev->dev, "null parent pdata\n");
314	return -EINVAL;
315	}
316
317	pdata = ppdata->regulator;
318	if (!pdata) {
319	dev_err(&pdev->dev, "null pdata\n");
320	return -EINVAL;
321	}
322
323	/* make sure the platform data has the correct size */
324	if (pdata->num_ext_regulator != ARRAY_SIZE(ab8500_ext_regulator_info)) {
325	dev_err(&pdev->dev, "Configuration error: size mismatch.\n");
326	return -EINVAL;
327	}
328
329	/* check for AB8500 2.x */
330	if (abx500_get_chip_id(&pdev->dev) < 0x30) {
331	struct ab8500_ext_regulator_info *info;
332
333	/* VextSupply3LPn is inverted on AB8500 2.x */
334	info = &ab8500_ext_regulator_info[AB8500_EXT_SUPPLY3];
335	info->update_val = 0x30;
336	info->update_val_en = 0x30;
337	info->update_val_en_lp = 0x10;
338	}
339
340	/* register all regulators */
341	for (i = 0; i < ARRAY_SIZE(ab8500_ext_regulator_info); i++) {
342	struct ab8500_ext_regulator_info *info = NULL;
343
344	/* assign per-regulator data */
345	info = &ab8500_ext_regulator_info[i];
346	info->dev = &pdev->dev;
347
348	config.dev = &pdev->dev;
349	config.init_data = &pdata->ext_regulator[i];
350	config.driver_data = info;
351
352	/* register regulator with framework */
353	info->rdev = regulator_register(&info->desc, &config);
354
355	if (IS_ERR(info->rdev)) {
356	err = PTR_ERR(info->rdev);
357	dev_err(&pdev->dev, "failed to register regulator %s\n",
358	info->desc.name);
359	/* when we fail, un-register all earlier regulators */
360	while (--i >= 0) {
361	info = &ab8500_ext_regulator_info[i];
362	regulator_unregister(info->rdev);
363	}
364	return err;
365	}
366
367	dev_dbg(rdev_get_dev(info->rdev),
368	"%s-probed\n", info->desc.name);
369	}
370
371	return 0;
372	}
373
374	int ab8500_ext_regulator_exit(struct platform_device *pdev)
375	{
376	int i;
377
378	for (i = 0; i < ARRAY_SIZE(ab8500_ext_regulator_info); i++) {
379	struct ab8500_ext_regulator_info *info = NULL;
380	info = &ab8500_ext_regulator_info[i];
381
382	dev_vdbg(rdev_get_dev(info->rdev),
383	"%s-remove\n", info->desc.name);
384
385	regulator_unregister(info->rdev);
386	}
387
388	return 0;
389	}
390
391	MODULE_LICENSE("GPL v2");
392	MODULE_AUTHOR("Bengt Jonsson <bengt.g.jonsson@stericsson.com>");
393	MODULE_DESCRIPTION("AB8500 external regulator driver");
394	MODULE_ALIAS("platform:ab8500-ext-regulator");