1 /*
2  * act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs
3  *
4  * http://www.active-semi.com/products/power-management-units/act88xx/
5  *
6  * Copyright (C) 2013 Atmel Corporation
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  */
18 
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/i2c.h>
22 #include <linux/err.h>
23 #include <linux/platform_device.h>
24 #include <linux/regulator/driver.h>
25 #include <linux/regulator/act8865.h>
26 #include <linux/of.h>
27 #include <linux/of_device.h>
28 #include <linux/regulator/of_regulator.h>
29 #include <linux/regmap.h>
30 
31 /*
32  * ACT8600 Global Register Map.
33  */
34 #define ACT8600_SYS_MODE	0x00
35 #define ACT8600_SYS_CTRL	0x01
36 #define ACT8600_DCDC1_VSET	0x10
37 #define ACT8600_DCDC1_CTRL	0x12
38 #define ACT8600_DCDC2_VSET	0x20
39 #define ACT8600_DCDC2_CTRL	0x22
40 #define ACT8600_DCDC3_VSET	0x30
41 #define ACT8600_DCDC3_CTRL	0x32
42 #define ACT8600_SUDCDC4_VSET	0x40
43 #define ACT8600_SUDCDC4_CTRL	0x41
44 #define ACT8600_LDO5_VSET	0x50
45 #define ACT8600_LDO5_CTRL	0x51
46 #define ACT8600_LDO6_VSET	0x60
47 #define ACT8600_LDO6_CTRL	0x61
48 #define ACT8600_LDO7_VSET	0x70
49 #define ACT8600_LDO7_CTRL	0x71
50 #define ACT8600_LDO8_VSET	0x80
51 #define ACT8600_LDO8_CTRL	0x81
52 #define ACT8600_LDO910_CTRL	0x91
53 #define ACT8600_APCH0		0xA1
54 #define ACT8600_APCH1		0xA8
55 #define ACT8600_APCH2		0xA9
56 #define ACT8600_APCH_STAT	0xAA
57 #define ACT8600_OTG0		0xB0
58 #define ACT8600_OTG1		0xB2
59 
60 /*
61  * ACT8846 Global Register Map.
62  */
63 #define	ACT8846_SYS0		0x00
64 #define	ACT8846_SYS1		0x01
65 #define	ACT8846_REG1_VSET	0x10
66 #define	ACT8846_REG1_CTRL	0x12
67 #define	ACT8846_REG2_VSET0	0x20
68 #define	ACT8846_REG2_VSET1	0x21
69 #define	ACT8846_REG2_CTRL	0x22
70 #define	ACT8846_REG3_VSET0	0x30
71 #define	ACT8846_REG3_VSET1	0x31
72 #define	ACT8846_REG3_CTRL	0x32
73 #define	ACT8846_REG4_VSET0	0x40
74 #define	ACT8846_REG4_VSET1	0x41
75 #define	ACT8846_REG4_CTRL	0x42
76 #define	ACT8846_REG5_VSET	0x50
77 #define	ACT8846_REG5_CTRL	0x51
78 #define	ACT8846_REG6_VSET	0x58
79 #define	ACT8846_REG6_CTRL	0x59
80 #define	ACT8846_REG7_VSET	0x60
81 #define	ACT8846_REG7_CTRL	0x61
82 #define	ACT8846_REG8_VSET	0x68
83 #define	ACT8846_REG8_CTRL	0x69
84 #define	ACT8846_REG9_VSET	0x70
85 #define	ACT8846_REG9_CTRL	0x71
86 #define	ACT8846_REG10_VSET	0x80
87 #define	ACT8846_REG10_CTRL	0x81
88 #define	ACT8846_REG11_VSET	0x90
89 #define	ACT8846_REG11_CTRL	0x91
90 #define	ACT8846_REG12_VSET	0xa0
91 #define	ACT8846_REG12_CTRL	0xa1
92 #define	ACT8846_REG13_CTRL	0xb1
93 #define	ACT8846_GLB_OFF_CTRL	0xc3
94 #define	ACT8846_OFF_SYSMASK	0x18
95 
96 /*
97  * ACT8865 Global Register Map.
98  */
99 #define	ACT8865_SYS_MODE	0x00
100 #define	ACT8865_SYS_CTRL	0x01
101 #define	ACT8865_DCDC1_VSET1	0x20
102 #define	ACT8865_DCDC1_VSET2	0x21
103 #define	ACT8865_DCDC1_CTRL	0x22
104 #define	ACT8865_DCDC2_VSET1	0x30
105 #define	ACT8865_DCDC2_VSET2	0x31
106 #define	ACT8865_DCDC2_CTRL	0x32
107 #define	ACT8865_DCDC3_VSET1	0x40
108 #define	ACT8865_DCDC3_VSET2	0x41
109 #define	ACT8865_DCDC3_CTRL	0x42
110 #define	ACT8865_LDO1_VSET	0x50
111 #define	ACT8865_LDO1_CTRL	0x51
112 #define	ACT8865_LDO2_VSET	0x54
113 #define	ACT8865_LDO2_CTRL	0x55
114 #define	ACT8865_LDO3_VSET	0x60
115 #define	ACT8865_LDO3_CTRL	0x61
116 #define	ACT8865_LDO4_VSET	0x64
117 #define	ACT8865_LDO4_CTRL	0x65
118 #define	ACT8865_MSTROFF		0x20
119 
120 /*
121  * Field Definitions.
122  */
123 #define	ACT8865_ENA		0x80	/* ON - [7] */
124 #define	ACT8865_VSEL_MASK	0x3F	/* VSET - [5:0] */
125 
126 
127 #define ACT8600_LDO10_ENA		0x40	/* ON - [6] */
128 #define ACT8600_SUDCDC_VSEL_MASK	0xFF	/* SUDCDC VSET - [7:0] */
129 
130 /*
131  * ACT8865 voltage number
132  */
133 #define	ACT8865_VOLTAGE_NUM	64
134 #define ACT8600_SUDCDC_VOLTAGE_NUM	255
135 
136 struct act8865 {
137 	struct regmap *regmap;
138 	int off_reg;
139 	int off_mask;
140 };
141 
142 static const struct regmap_range act8600_reg_ranges[] = {
143 	regmap_reg_range(0x00, 0x01),
144 	regmap_reg_range(0x10, 0x10),
145 	regmap_reg_range(0x12, 0x12),
146 	regmap_reg_range(0x20, 0x20),
147 	regmap_reg_range(0x22, 0x22),
148 	regmap_reg_range(0x30, 0x30),
149 	regmap_reg_range(0x32, 0x32),
150 	regmap_reg_range(0x40, 0x41),
151 	regmap_reg_range(0x50, 0x51),
152 	regmap_reg_range(0x60, 0x61),
153 	regmap_reg_range(0x70, 0x71),
154 	regmap_reg_range(0x80, 0x81),
155 	regmap_reg_range(0x91, 0x91),
156 	regmap_reg_range(0xA1, 0xA1),
157 	regmap_reg_range(0xA8, 0xAA),
158 	regmap_reg_range(0xB0, 0xB0),
159 	regmap_reg_range(0xB2, 0xB2),
160 	regmap_reg_range(0xC1, 0xC1),
161 };
162 
163 static const struct regmap_range act8600_reg_ro_ranges[] = {
164 	regmap_reg_range(0xAA, 0xAA),
165 	regmap_reg_range(0xC1, 0xC1),
166 };
167 
168 static const struct regmap_range act8600_reg_volatile_ranges[] = {
169 	regmap_reg_range(0x00, 0x01),
170 	regmap_reg_range(0x12, 0x12),
171 	regmap_reg_range(0x22, 0x22),
172 	regmap_reg_range(0x32, 0x32),
173 	regmap_reg_range(0x41, 0x41),
174 	regmap_reg_range(0x51, 0x51),
175 	regmap_reg_range(0x61, 0x61),
176 	regmap_reg_range(0x71, 0x71),
177 	regmap_reg_range(0x81, 0x81),
178 	regmap_reg_range(0xA8, 0xA8),
179 	regmap_reg_range(0xAA, 0xAA),
180 	regmap_reg_range(0xB0, 0xB0),
181 	regmap_reg_range(0xC1, 0xC1),
182 };
183 
184 static const struct regmap_access_table act8600_write_ranges_table = {
185 	.yes_ranges	= act8600_reg_ranges,
186 	.n_yes_ranges	= ARRAY_SIZE(act8600_reg_ranges),
187 	.no_ranges	= act8600_reg_ro_ranges,
188 	.n_no_ranges	= ARRAY_SIZE(act8600_reg_ro_ranges),
189 };
190 
191 static const struct regmap_access_table act8600_read_ranges_table = {
192 	.yes_ranges	= act8600_reg_ranges,
193 	.n_yes_ranges	= ARRAY_SIZE(act8600_reg_ranges),
194 };
195 
196 static const struct regmap_access_table act8600_volatile_ranges_table = {
197 	.yes_ranges	= act8600_reg_volatile_ranges,
198 	.n_yes_ranges	= ARRAY_SIZE(act8600_reg_volatile_ranges),
199 };
200 
201 static const struct regmap_config act8600_regmap_config = {
202 	.reg_bits = 8,
203 	.val_bits = 8,
204 	.max_register = 0xFF,
205 	.wr_table = &act8600_write_ranges_table,
206 	.rd_table = &act8600_read_ranges_table,
207 	.volatile_table = &act8600_volatile_ranges_table,
208 };
209 
210 static const struct regmap_config act8865_regmap_config = {
211 	.reg_bits = 8,
212 	.val_bits = 8,
213 };
214 
215 static const struct regulator_linear_range act8865_voltage_ranges[] = {
216 	REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
217 	REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
218 	REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
219 };
220 
221 static const struct regulator_linear_range act8600_sudcdc_voltage_ranges[] = {
222 	REGULATOR_LINEAR_RANGE(3000000, 0, 63, 0),
223 	REGULATOR_LINEAR_RANGE(3000000, 64, 159, 100000),
224 	REGULATOR_LINEAR_RANGE(12600000, 160, 191, 200000),
225 	REGULATOR_LINEAR_RANGE(19000000, 191, 255, 400000),
226 };
227 
228 static struct regulator_ops act8865_ops = {
229 	.list_voltage		= regulator_list_voltage_linear_range,
230 	.map_voltage		= regulator_map_voltage_linear_range,
231 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
232 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
233 	.enable			= regulator_enable_regmap,
234 	.disable		= regulator_disable_regmap,
235 	.is_enabled		= regulator_is_enabled_regmap,
236 };
237 
238 static struct regulator_ops act8865_ldo_ops = {
239 	.enable			= regulator_enable_regmap,
240 	.disable		= regulator_disable_regmap,
241 	.is_enabled		= regulator_is_enabled_regmap,
242 };
243 
244 #define ACT88xx_REG(_name, _family, _id, _vsel_reg, _supply)		\
245 	[_family##_ID_##_id] = {					\
246 		.name			= _name,			\
247 		.supply_name		= _supply,			\
248 		.id			= _family##_ID_##_id,		\
249 		.type			= REGULATOR_VOLTAGE,		\
250 		.ops			= &act8865_ops,			\
251 		.n_voltages		= ACT8865_VOLTAGE_NUM,		\
252 		.linear_ranges		= act8865_voltage_ranges,	\
253 		.n_linear_ranges	= ARRAY_SIZE(act8865_voltage_ranges), \
254 		.vsel_reg		= _family##_##_id##_##_vsel_reg, \
255 		.vsel_mask		= ACT8865_VSEL_MASK,		\
256 		.enable_reg		= _family##_##_id##_CTRL,	\
257 		.enable_mask		= ACT8865_ENA,			\
258 		.owner			= THIS_MODULE,			\
259 	}
260 
261 static const struct regulator_desc act8600_regulators[] = {
262 	ACT88xx_REG("DCDC1", ACT8600, DCDC1, VSET, "vp1"),
263 	ACT88xx_REG("DCDC2", ACT8600, DCDC2, VSET, "vp2"),
264 	ACT88xx_REG("DCDC3", ACT8600, DCDC3, VSET, "vp3"),
265 	{
266 		.name = "SUDCDC_REG4",
267 		.id = ACT8600_ID_SUDCDC4,
268 		.ops = &act8865_ops,
269 		.type = REGULATOR_VOLTAGE,
270 		.n_voltages = ACT8600_SUDCDC_VOLTAGE_NUM,
271 		.linear_ranges = act8600_sudcdc_voltage_ranges,
272 		.n_linear_ranges = ARRAY_SIZE(act8600_sudcdc_voltage_ranges),
273 		.vsel_reg = ACT8600_SUDCDC4_VSET,
274 		.vsel_mask = ACT8600_SUDCDC_VSEL_MASK,
275 		.enable_reg = ACT8600_SUDCDC4_CTRL,
276 		.enable_mask = ACT8865_ENA,
277 		.owner = THIS_MODULE,
278 	},
279 	ACT88xx_REG("LDO5", ACT8600, LDO5, VSET, "inl"),
280 	ACT88xx_REG("LDO6", ACT8600, LDO6, VSET, "inl"),
281 	ACT88xx_REG("LDO7", ACT8600, LDO7, VSET, "inl"),
282 	ACT88xx_REG("LDO8", ACT8600, LDO8, VSET, "inl"),
283 	{
284 		.name = "LDO_REG9",
285 		.id = ACT8600_ID_LDO9,
286 		.ops = &act8865_ldo_ops,
287 		.type = REGULATOR_VOLTAGE,
288 		.n_voltages = 1,
289 		.fixed_uV = 3300000,
290 		.enable_reg = ACT8600_LDO910_CTRL,
291 		.enable_mask = ACT8865_ENA,
292 		.owner = THIS_MODULE,
293 	},
294 	{
295 		.name = "LDO_REG10",
296 		.id = ACT8600_ID_LDO10,
297 		.ops = &act8865_ldo_ops,
298 		.type = REGULATOR_VOLTAGE,
299 		.n_voltages = 1,
300 		.fixed_uV = 1200000,
301 		.enable_reg = ACT8600_LDO910_CTRL,
302 		.enable_mask = ACT8600_LDO10_ENA,
303 		.owner = THIS_MODULE,
304 	},
305 };
306 
307 static const struct regulator_desc act8846_regulators[] = {
308 	ACT88xx_REG("REG1", ACT8846, REG1, VSET, "vp1"),
309 	ACT88xx_REG("REG2", ACT8846, REG2, VSET0, "vp2"),
310 	ACT88xx_REG("REG3", ACT8846, REG3, VSET0, "vp3"),
311 	ACT88xx_REG("REG4", ACT8846, REG4, VSET0, "vp4"),
312 	ACT88xx_REG("REG5", ACT8846, REG5, VSET, "inl1"),
313 	ACT88xx_REG("REG6", ACT8846, REG6, VSET, "inl1"),
314 	ACT88xx_REG("REG7", ACT8846, REG7, VSET, "inl1"),
315 	ACT88xx_REG("REG8", ACT8846, REG8, VSET, "inl2"),
316 	ACT88xx_REG("REG9", ACT8846, REG9, VSET, "inl2"),
317 	ACT88xx_REG("REG10", ACT8846, REG10, VSET, "inl3"),
318 	ACT88xx_REG("REG11", ACT8846, REG11, VSET, "inl3"),
319 	ACT88xx_REG("REG12", ACT8846, REG12, VSET, "inl3"),
320 };
321 
322 static const struct regulator_desc act8865_regulators[] = {
323 	ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1, "vp1"),
324 	ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1, "vp2"),
325 	ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1, "vp3"),
326 	ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
327 	ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
328 	ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
329 	ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
330 };
331 
332 static const struct regulator_desc act8865_alt_regulators[] = {
333 	ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET2, "vp1"),
334 	ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET2, "vp2"),
335 	ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET2, "vp3"),
336 	ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
337 	ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
338 	ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
339 	ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
340 };
341 
342 #ifdef CONFIG_OF
343 static const struct of_device_id act8865_dt_ids[] = {
344 	{ .compatible = "active-semi,act8600", .data = (void *)ACT8600 },
345 	{ .compatible = "active-semi,act8846", .data = (void *)ACT8846 },
346 	{ .compatible = "active-semi,act8865", .data = (void *)ACT8865 },
347 	{ }
348 };
349 MODULE_DEVICE_TABLE(of, act8865_dt_ids);
350 
351 static struct of_regulator_match act8846_matches[] = {
352 	[ACT8846_ID_REG1]	= { .name = "REG1" },
353 	[ACT8846_ID_REG2]	= { .name = "REG2" },
354 	[ACT8846_ID_REG3]	= { .name = "REG3" },
355 	[ACT8846_ID_REG4]	= { .name = "REG4" },
356 	[ACT8846_ID_REG5]	= { .name = "REG5" },
357 	[ACT8846_ID_REG6]	= { .name = "REG6" },
358 	[ACT8846_ID_REG7]	= { .name = "REG7" },
359 	[ACT8846_ID_REG8]	= { .name = "REG8" },
360 	[ACT8846_ID_REG9]	= { .name = "REG9" },
361 	[ACT8846_ID_REG10]	= { .name = "REG10" },
362 	[ACT8846_ID_REG11]	= { .name = "REG11" },
363 	[ACT8846_ID_REG12]	= { .name = "REG12" },
364 };
365 
366 static struct of_regulator_match act8865_matches[] = {
367 	[ACT8865_ID_DCDC1]	= { .name = "DCDC_REG1"},
368 	[ACT8865_ID_DCDC2]	= { .name = "DCDC_REG2"},
369 	[ACT8865_ID_DCDC3]	= { .name = "DCDC_REG3"},
370 	[ACT8865_ID_LDO1]	= { .name = "LDO_REG1"},
371 	[ACT8865_ID_LDO2]	= { .name = "LDO_REG2"},
372 	[ACT8865_ID_LDO3]	= { .name = "LDO_REG3"},
373 	[ACT8865_ID_LDO4]	= { .name = "LDO_REG4"},
374 };
375 
376 static struct of_regulator_match act8600_matches[] = {
377 	[ACT8600_ID_DCDC1]	= { .name = "DCDC_REG1"},
378 	[ACT8600_ID_DCDC2]	= { .name = "DCDC_REG2"},
379 	[ACT8600_ID_DCDC3]	= { .name = "DCDC_REG3"},
380 	[ACT8600_ID_SUDCDC4]	= { .name = "SUDCDC_REG4"},
381 	[ACT8600_ID_LDO5]	= { .name = "LDO_REG5"},
382 	[ACT8600_ID_LDO6]	= { .name = "LDO_REG6"},
383 	[ACT8600_ID_LDO7]	= { .name = "LDO_REG7"},
384 	[ACT8600_ID_LDO8]	= { .name = "LDO_REG8"},
385 	[ACT8600_ID_LDO9]	= { .name = "LDO_REG9"},
386 	[ACT8600_ID_LDO10]	= { .name = "LDO_REG10"},
387 };
388 
389 static int act8865_pdata_from_dt(struct device *dev,
390 				 struct act8865_platform_data *pdata,
391 				 unsigned long type)
392 {
393 	int matched, i, num_matches;
394 	struct device_node *np;
395 	struct act8865_regulator_data *regulator;
396 	struct of_regulator_match *matches;
397 
398 	np = of_get_child_by_name(dev->of_node, "regulators");
399 	if (!np) {
400 		dev_err(dev, "missing 'regulators' subnode in DT\n");
401 		return -EINVAL;
402 	}
403 
404 	switch (type) {
405 	case ACT8600:
406 		matches = act8600_matches;
407 		num_matches = ARRAY_SIZE(act8600_matches);
408 		break;
409 	case ACT8846:
410 		matches = act8846_matches;
411 		num_matches = ARRAY_SIZE(act8846_matches);
412 		break;
413 	case ACT8865:
414 		matches = act8865_matches;
415 		num_matches = ARRAY_SIZE(act8865_matches);
416 		break;
417 	default:
418 		dev_err(dev, "invalid device id %lu\n", type);
419 		return -EINVAL;
420 	}
421 
422 	matched = of_regulator_match(dev, np, matches, num_matches);
423 	of_node_put(np);
424 	if (matched <= 0)
425 		return matched;
426 
427 	pdata->regulators = devm_kzalloc(dev,
428 					 sizeof(struct act8865_regulator_data) *
429 					 num_matches, GFP_KERNEL);
430 	if (!pdata->regulators)
431 		return -ENOMEM;
432 
433 	pdata->num_regulators = num_matches;
434 	regulator = pdata->regulators;
435 
436 	for (i = 0; i < num_matches; i++) {
437 		regulator->id = i;
438 		regulator->name = matches[i].name;
439 		regulator->init_data = matches[i].init_data;
440 		regulator->of_node = matches[i].of_node;
441 		regulator++;
442 	}
443 
444 	return 0;
445 }
446 #else
447 static inline int act8865_pdata_from_dt(struct device *dev,
448 					struct act8865_platform_data *pdata,
449 					unsigned long type)
450 {
451 	return 0;
452 }
453 #endif
454 
455 static struct act8865_regulator_data *act8865_get_regulator_data(
456 		int id, struct act8865_platform_data *pdata)
457 {
458 	int i;
459 
460 	if (!pdata)
461 		return NULL;
462 
463 	for (i = 0; i < pdata->num_regulators; i++) {
464 		if (pdata->regulators[i].id == id)
465 			return &pdata->regulators[i];
466 	}
467 
468 	return NULL;
469 }
470 
471 static struct i2c_client *act8865_i2c_client;
472 static void act8865_power_off(void)
473 {
474 	struct act8865 *act8865;
475 
476 	act8865 = i2c_get_clientdata(act8865_i2c_client);
477 	regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask);
478 	while (1);
479 }
480 
481 static int act8865_pmic_probe(struct i2c_client *client,
482 			      const struct i2c_device_id *i2c_id)
483 {
484 	const struct regulator_desc *regulators;
485 	struct act8865_platform_data pdata_of, *pdata;
486 	struct device *dev = &client->dev;
487 	int i, ret, num_regulators;
488 	struct act8865 *act8865;
489 	const struct regmap_config *regmap_config;
490 	unsigned long type;
491 	int off_reg, off_mask;
492 	int voltage_select = 0;
493 
494 	pdata = dev_get_platdata(dev);
495 
496 	if (dev->of_node && !pdata) {
497 		const struct of_device_id *id;
498 
499 		id = of_match_device(of_match_ptr(act8865_dt_ids), dev);
500 		if (!id)
501 			return -ENODEV;
502 
503 		type = (unsigned long) id->data;
504 
505 		voltage_select = !!of_get_property(dev->of_node,
506 						   "active-semi,vsel-high",
507 						   NULL);
508 	} else {
509 		type = i2c_id->driver_data;
510 	}
511 
512 	switch (type) {
513 	case ACT8600:
514 		regulators = act8600_regulators;
515 		num_regulators = ARRAY_SIZE(act8600_regulators);
516 		regmap_config = &act8600_regmap_config;
517 		off_reg = -1;
518 		off_mask = -1;
519 		break;
520 	case ACT8846:
521 		regulators = act8846_regulators;
522 		num_regulators = ARRAY_SIZE(act8846_regulators);
523 		regmap_config = &act8865_regmap_config;
524 		off_reg = ACT8846_GLB_OFF_CTRL;
525 		off_mask = ACT8846_OFF_SYSMASK;
526 		break;
527 	case ACT8865:
528 		if (voltage_select) {
529 			regulators = act8865_alt_regulators;
530 			num_regulators = ARRAY_SIZE(act8865_alt_regulators);
531 		} else {
532 			regulators = act8865_regulators;
533 			num_regulators = ARRAY_SIZE(act8865_regulators);
534 		}
535 		regmap_config = &act8865_regmap_config;
536 		off_reg = ACT8865_SYS_CTRL;
537 		off_mask = ACT8865_MSTROFF;
538 		break;
539 	default:
540 		dev_err(dev, "invalid device id %lu\n", type);
541 		return -EINVAL;
542 	}
543 
544 	if (dev->of_node && !pdata) {
545 		ret = act8865_pdata_from_dt(dev, &pdata_of, type);
546 		if (ret < 0)
547 			return ret;
548 
549 		pdata = &pdata_of;
550 	}
551 
552 	act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL);
553 	if (!act8865)
554 		return -ENOMEM;
555 
556 	act8865->regmap = devm_regmap_init_i2c(client, regmap_config);
557 	if (IS_ERR(act8865->regmap)) {
558 		ret = PTR_ERR(act8865->regmap);
559 		dev_err(dev, "Failed to allocate register map: %d\n", ret);
560 		return ret;
561 	}
562 
563 	if (of_device_is_system_power_controller(dev->of_node)) {
564 		if (!pm_power_off && (off_reg > 0)) {
565 			act8865_i2c_client = client;
566 			act8865->off_reg = off_reg;
567 			act8865->off_mask = off_mask;
568 			pm_power_off = act8865_power_off;
569 		} else {
570 			dev_err(dev, "Failed to set poweroff capability, already defined\n");
571 		}
572 	}
573 
574 	/* Finally register devices */
575 	for (i = 0; i < num_regulators; i++) {
576 		const struct regulator_desc *desc = &regulators[i];
577 		struct regulator_config config = { };
578 		struct act8865_regulator_data *rdata;
579 		struct regulator_dev *rdev;
580 
581 		config.dev = dev;
582 		config.driver_data = act8865;
583 		config.regmap = act8865->regmap;
584 
585 		rdata = act8865_get_regulator_data(desc->id, pdata);
586 		if (rdata) {
587 			config.init_data = rdata->init_data;
588 			config.of_node = rdata->of_node;
589 		}
590 
591 		rdev = devm_regulator_register(dev, desc, &config);
592 		if (IS_ERR(rdev)) {
593 			dev_err(dev, "failed to register %s\n", desc->name);
594 			return PTR_ERR(rdev);
595 		}
596 	}
597 
598 	i2c_set_clientdata(client, act8865);
599 
600 	return 0;
601 }
602 
603 static const struct i2c_device_id act8865_ids[] = {
604 	{ .name = "act8600", .driver_data = ACT8600 },
605 	{ .name = "act8846", .driver_data = ACT8846 },
606 	{ .name = "act8865", .driver_data = ACT8865 },
607 	{ },
608 };
609 MODULE_DEVICE_TABLE(i2c, act8865_ids);
610 
611 static struct i2c_driver act8865_pmic_driver = {
612 	.driver	= {
613 		.name	= "act8865",
614 	},
615 	.probe		= act8865_pmic_probe,
616 	.id_table	= act8865_ids,
617 };
618 
619 module_i2c_driver(act8865_pmic_driver);
620 
621 MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver");
622 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
623 MODULE_LICENSE("GPL v2");
624