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0cbdf7bc MS |
1 | /* |
2 | * Regulator driver for National Semiconductors LP3971 PMIC chip | |
3 | * | |
4 | * Copyright (C) 2009 Samsung Electronics | |
5 | * Author: Marek Szyprowski <m.szyprowski@samsung.com> | |
6 | * | |
7 | * Based on wm8350.c | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/bug.h> | |
16 | #include <linux/err.h> | |
17 | #include <linux/i2c.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/regulator/driver.h> | |
20 | #include <linux/regulator/lp3971.h> | |
21 | ||
22 | struct lp3971 { | |
23 | struct device *dev; | |
24 | struct mutex io_lock; | |
25 | struct i2c_client *i2c; | |
26 | int num_regulators; | |
27 | struct regulator_dev **rdev; | |
28 | }; | |
29 | ||
30 | static u8 lp3971_reg_read(struct lp3971 *lp3971, u8 reg); | |
31 | static int lp3971_set_bits(struct lp3971 *lp3971, u8 reg, u16 mask, u16 val); | |
32 | ||
33 | #define LP3971_SYS_CONTROL1_REG 0x07 | |
34 | ||
35 | /* System control register 1 initial value, | |
36 | bits 4 and 5 are EPROM programmable */ | |
37 | #define SYS_CONTROL1_INIT_VAL 0x40 | |
38 | #define SYS_CONTROL1_INIT_MASK 0xCF | |
39 | ||
40 | #define LP3971_BUCK_VOL_ENABLE_REG 0x10 | |
41 | #define LP3971_BUCK_VOL_CHANGE_REG 0x20 | |
42 | ||
43 | /* Voltage control registers shift: | |
44 | LP3971_BUCK1 -> 0 | |
45 | LP3971_BUCK2 -> 4 | |
46 | LP3971_BUCK3 -> 6 | |
47 | */ | |
48 | #define BUCK_VOL_CHANGE_SHIFT(x) (((1 << x) & ~0x01) << 1) | |
49 | #define BUCK_VOL_CHANGE_FLAG_GO 0x01 | |
50 | #define BUCK_VOL_CHANGE_FLAG_TARGET 0x02 | |
51 | #define BUCK_VOL_CHANGE_FLAG_MASK 0x03 | |
52 | ||
53 | #define LP3971_BUCK1_BASE 0x23 | |
54 | #define LP3971_BUCK2_BASE 0x29 | |
55 | #define LP3971_BUCK3_BASE 0x32 | |
56 | ||
57 | const static int buck_base_addr[] = { | |
58 | LP3971_BUCK1_BASE, | |
59 | LP3971_BUCK2_BASE, | |
60 | LP3971_BUCK3_BASE, | |
61 | }; | |
62 | ||
63 | #define LP3971_BUCK_TARGET_VOL1_REG(x) (buck_base_addr[x]) | |
64 | #define LP3971_BUCK_TARGET_VOL2_REG(x) (buck_base_addr[x]+1) | |
65 | ||
66 | const static int buck_voltage_map[] = { | |
67 | 0, 800, 850, 900, 950, 1000, 1050, 1100, | |
68 | 1150, 1200, 1250, 1300, 1350, 1400, 1450, 1500, | |
69 | 1550, 1600, 1650, 1700, 1800, 1900, 2500, 2800, | |
70 | 3000, 3300, | |
71 | }; | |
72 | ||
73 | #define BUCK_TARGET_VOL_MASK 0x3f | |
74 | #define BUCK_TARGET_VOL_MIN_IDX 0x01 | |
75 | #define BUCK_TARGET_VOL_MAX_IDX 0x19 | |
76 | ||
77 | #define LP3971_BUCK_RAMP_REG(x) (buck_base_addr[x]+2) | |
78 | ||
79 | #define LP3971_LDO_ENABLE_REG 0x12 | |
80 | #define LP3971_LDO_VOL_CONTR_BASE 0x39 | |
81 | ||
82 | /* Voltage control registers: | |
83 | LP3971_LDO1 -> LP3971_LDO_VOL_CONTR_BASE + 0 | |
84 | LP3971_LDO2 -> LP3971_LDO_VOL_CONTR_BASE + 0 | |
85 | LP3971_LDO3 -> LP3971_LDO_VOL_CONTR_BASE + 1 | |
86 | LP3971_LDO4 -> LP3971_LDO_VOL_CONTR_BASE + 1 | |
87 | LP3971_LDO5 -> LP3971_LDO_VOL_CONTR_BASE + 2 | |
88 | */ | |
89 | #define LP3971_LDO_VOL_CONTR_REG(x) (LP3971_LDO_VOL_CONTR_BASE + (x >> 1)) | |
90 | ||
91 | /* Voltage control registers shift: | |
92 | LP3971_LDO1 -> 0, LP3971_LDO2 -> 4 | |
93 | LP3971_LDO3 -> 0, LP3971_LDO4 -> 4 | |
94 | LP3971_LDO5 -> 0 | |
95 | */ | |
96 | #define LDO_VOL_CONTR_SHIFT(x) ((x & 1) << 2) | |
97 | #define LDO_VOL_CONTR_MASK 0x0f | |
98 | ||
99 | const static int ldo45_voltage_map[] = { | |
100 | 1000, 1050, 1100, 1150, 1200, 1250, 1300, 1350, | |
101 | 1400, 1500, 1800, 1900, 2500, 2800, 3000, 3300, | |
102 | }; | |
103 | ||
104 | const static int ldo123_voltage_map[] = { | |
105 | 1800, 1900, 2000, 2100, 2200, 2300, 2400, 2500, | |
106 | 2600, 2700, 2800, 2900, 3000, 3100, 3200, 3300, | |
107 | }; | |
108 | ||
109 | const static int *ldo_voltage_map[] = { | |
110 | ldo123_voltage_map, /* LDO1 */ | |
111 | ldo123_voltage_map, /* LDO2 */ | |
112 | ldo123_voltage_map, /* LDO3 */ | |
113 | ldo45_voltage_map, /* LDO4 */ | |
114 | ldo45_voltage_map, /* LDO5 */ | |
115 | }; | |
116 | ||
117 | #define LDO_VOL_VALUE_MAP(x) (ldo_voltage_map[(x - LP3971_LDO1)]) | |
118 | ||
119 | #define LDO_VOL_MIN_IDX 0x00 | |
120 | #define LDO_VOL_MAX_IDX 0x0f | |
121 | ||
122 | static int lp3971_ldo_list_voltage(struct regulator_dev *dev, unsigned index) | |
123 | { | |
124 | int ldo = rdev_get_id(dev) - LP3971_LDO1; | |
125 | return 1000 * LDO_VOL_VALUE_MAP(ldo)[index]; | |
126 | } | |
127 | ||
128 | static int lp3971_ldo_is_enabled(struct regulator_dev *dev) | |
129 | { | |
130 | struct lp3971 *lp3971 = rdev_get_drvdata(dev); | |
131 | int ldo = rdev_get_id(dev) - LP3971_LDO1; | |
132 | u16 mask = 1 << (1 + ldo); | |
133 | u16 val; | |
134 | ||
135 | val = lp3971_reg_read(lp3971, LP3971_LDO_ENABLE_REG); | |
136 | return (val & mask) != 0; | |
137 | } | |
138 | ||
139 | static int lp3971_ldo_enable(struct regulator_dev *dev) | |
140 | { | |
141 | struct lp3971 *lp3971 = rdev_get_drvdata(dev); | |
142 | int ldo = rdev_get_id(dev) - LP3971_LDO1; | |
143 | u16 mask = 1 << (1 + ldo); | |
144 | ||
145 | return lp3971_set_bits(lp3971, LP3971_LDO_ENABLE_REG, mask, mask); | |
146 | } | |
147 | ||
148 | static int lp3971_ldo_disable(struct regulator_dev *dev) | |
149 | { | |
150 | struct lp3971 *lp3971 = rdev_get_drvdata(dev); | |
151 | int ldo = rdev_get_id(dev) - LP3971_LDO1; | |
152 | u16 mask = 1 << (1 + ldo); | |
153 | ||
154 | return lp3971_set_bits(lp3971, LP3971_LDO_ENABLE_REG, mask, 0); | |
155 | } | |
156 | ||
157 | static int lp3971_ldo_get_voltage(struct regulator_dev *dev) | |
158 | { | |
159 | struct lp3971 *lp3971 = rdev_get_drvdata(dev); | |
160 | int ldo = rdev_get_id(dev) - LP3971_LDO1; | |
161 | u16 val, reg; | |
162 | ||
163 | reg = lp3971_reg_read(lp3971, LP3971_LDO_VOL_CONTR_REG(ldo)); | |
164 | val = (reg >> LDO_VOL_CONTR_SHIFT(ldo)) & LDO_VOL_CONTR_MASK; | |
165 | ||
166 | return 1000 * LDO_VOL_VALUE_MAP(ldo)[val]; | |
167 | } | |
168 | ||
169 | static int lp3971_ldo_set_voltage(struct regulator_dev *dev, | |
170 | int min_uV, int max_uV) | |
171 | { | |
172 | struct lp3971 *lp3971 = rdev_get_drvdata(dev); | |
173 | int ldo = rdev_get_id(dev) - LP3971_LDO1; | |
174 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
175 | const int *vol_map = LDO_VOL_VALUE_MAP(ldo); | |
176 | u16 val; | |
177 | ||
178 | if (min_vol < vol_map[LDO_VOL_MIN_IDX] || | |
179 | min_vol > vol_map[LDO_VOL_MAX_IDX]) | |
180 | return -EINVAL; | |
181 | ||
182 | for (val = LDO_VOL_MIN_IDX; val <= LDO_VOL_MAX_IDX; val++) | |
183 | if (vol_map[val] >= min_vol) | |
184 | break; | |
185 | ||
186 | if (vol_map[val] > max_vol) | |
187 | return -EINVAL; | |
188 | ||
189 | return lp3971_set_bits(lp3971, LP3971_LDO_VOL_CONTR_REG(ldo), | |
190 | LDO_VOL_CONTR_MASK << LDO_VOL_CONTR_SHIFT(ldo), val); | |
191 | } | |
192 | ||
193 | static struct regulator_ops lp3971_ldo_ops = { | |
194 | .list_voltage = lp3971_ldo_list_voltage, | |
195 | .is_enabled = lp3971_ldo_is_enabled, | |
196 | .enable = lp3971_ldo_enable, | |
197 | .disable = lp3971_ldo_disable, | |
198 | .get_voltage = lp3971_ldo_get_voltage, | |
199 | .set_voltage = lp3971_ldo_set_voltage, | |
200 | }; | |
201 | ||
202 | static int lp3971_dcdc_list_voltage(struct regulator_dev *dev, unsigned index) | |
203 | { | |
204 | return 1000 * buck_voltage_map[index]; | |
205 | } | |
206 | ||
207 | static int lp3971_dcdc_is_enabled(struct regulator_dev *dev) | |
208 | { | |
209 | struct lp3971 *lp3971 = rdev_get_drvdata(dev); | |
210 | int buck = rdev_get_id(dev) - LP3971_DCDC1; | |
211 | u16 mask = 1 << (buck * 2); | |
212 | u16 val; | |
213 | ||
214 | val = lp3971_reg_read(lp3971, LP3971_BUCK_VOL_ENABLE_REG); | |
215 | return (val & mask) != 0; | |
216 | } | |
217 | ||
218 | static int lp3971_dcdc_enable(struct regulator_dev *dev) | |
219 | { | |
220 | struct lp3971 *lp3971 = rdev_get_drvdata(dev); | |
221 | int buck = rdev_get_id(dev) - LP3971_DCDC1; | |
222 | u16 mask = 1 << (buck * 2); | |
223 | ||
224 | return lp3971_set_bits(lp3971, LP3971_BUCK_VOL_ENABLE_REG, mask, mask); | |
225 | } | |
226 | ||
227 | static int lp3971_dcdc_disable(struct regulator_dev *dev) | |
228 | { | |
229 | struct lp3971 *lp3971 = rdev_get_drvdata(dev); | |
230 | int buck = rdev_get_id(dev) - LP3971_DCDC1; | |
231 | u16 mask = 1 << (buck * 2); | |
232 | ||
233 | return lp3971_set_bits(lp3971, LP3971_BUCK_VOL_ENABLE_REG, mask, 0); | |
234 | } | |
235 | ||
236 | static int lp3971_dcdc_get_voltage(struct regulator_dev *dev) | |
237 | { | |
238 | struct lp3971 *lp3971 = rdev_get_drvdata(dev); | |
239 | int buck = rdev_get_id(dev) - LP3971_DCDC1; | |
240 | u16 reg; | |
241 | int val; | |
242 | ||
243 | reg = lp3971_reg_read(lp3971, LP3971_BUCK_TARGET_VOL1_REG(buck)); | |
244 | reg &= BUCK_TARGET_VOL_MASK; | |
245 | ||
246 | if (reg <= BUCK_TARGET_VOL_MAX_IDX) | |
247 | val = 1000 * buck_voltage_map[reg]; | |
248 | else { | |
249 | val = 0; | |
250 | dev_warn(&dev->dev, "chip reported incorrect voltage value.\n"); | |
251 | } | |
252 | ||
253 | return val; | |
254 | } | |
255 | ||
256 | static int lp3971_dcdc_set_voltage(struct regulator_dev *dev, | |
257 | int min_uV, int max_uV) | |
258 | { | |
259 | struct lp3971 *lp3971 = rdev_get_drvdata(dev); | |
260 | int buck = rdev_get_id(dev) - LP3971_DCDC1; | |
261 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
262 | const int *vol_map = buck_voltage_map; | |
263 | u16 val; | |
264 | int ret; | |
265 | ||
266 | if (min_vol < vol_map[BUCK_TARGET_VOL_MIN_IDX] || | |
267 | min_vol > vol_map[BUCK_TARGET_VOL_MAX_IDX]) | |
268 | return -EINVAL; | |
269 | ||
270 | for (val = BUCK_TARGET_VOL_MIN_IDX; val <= BUCK_TARGET_VOL_MAX_IDX; | |
271 | val++) | |
272 | if (vol_map[val] >= min_vol) | |
273 | break; | |
274 | ||
275 | if (vol_map[val] > max_vol) | |
276 | return -EINVAL; | |
277 | ||
278 | ret = lp3971_set_bits(lp3971, LP3971_BUCK_TARGET_VOL1_REG(buck), | |
279 | BUCK_TARGET_VOL_MASK, val); | |
280 | if (ret) | |
281 | return ret; | |
282 | ||
283 | ret = lp3971_set_bits(lp3971, LP3971_BUCK_VOL_CHANGE_REG, | |
284 | BUCK_VOL_CHANGE_FLAG_MASK << BUCK_VOL_CHANGE_SHIFT(buck), | |
285 | BUCK_VOL_CHANGE_FLAG_GO << BUCK_VOL_CHANGE_SHIFT(buck)); | |
286 | if (ret) | |
287 | return ret; | |
288 | ||
289 | return lp3971_set_bits(lp3971, LP3971_BUCK_VOL_CHANGE_REG, | |
290 | BUCK_VOL_CHANGE_FLAG_MASK << BUCK_VOL_CHANGE_SHIFT(buck), | |
291 | 0 << BUCK_VOL_CHANGE_SHIFT(buck)); | |
292 | } | |
293 | ||
294 | static struct regulator_ops lp3971_dcdc_ops = { | |
295 | .list_voltage = lp3971_dcdc_list_voltage, | |
296 | .is_enabled = lp3971_dcdc_is_enabled, | |
297 | .enable = lp3971_dcdc_enable, | |
298 | .disable = lp3971_dcdc_disable, | |
299 | .get_voltage = lp3971_dcdc_get_voltage, | |
300 | .set_voltage = lp3971_dcdc_set_voltage, | |
301 | }; | |
302 | ||
303 | static struct regulator_desc regulators[] = { | |
304 | { | |
305 | .name = "LDO1", | |
306 | .id = LP3971_LDO1, | |
307 | .ops = &lp3971_ldo_ops, | |
308 | .n_voltages = ARRAY_SIZE(ldo123_voltage_map), | |
309 | .type = REGULATOR_VOLTAGE, | |
310 | .owner = THIS_MODULE, | |
311 | }, | |
312 | { | |
313 | .name = "LDO2", | |
314 | .id = LP3971_LDO2, | |
315 | .ops = &lp3971_ldo_ops, | |
316 | .n_voltages = ARRAY_SIZE(ldo123_voltage_map), | |
317 | .type = REGULATOR_VOLTAGE, | |
318 | .owner = THIS_MODULE, | |
319 | }, | |
320 | { | |
321 | .name = "LDO3", | |
322 | .id = LP3971_LDO3, | |
323 | .ops = &lp3971_ldo_ops, | |
324 | .n_voltages = ARRAY_SIZE(ldo123_voltage_map), | |
325 | .type = REGULATOR_VOLTAGE, | |
326 | .owner = THIS_MODULE, | |
327 | }, | |
328 | { | |
329 | .name = "LDO4", | |
330 | .id = LP3971_LDO4, | |
331 | .ops = &lp3971_ldo_ops, | |
332 | .n_voltages = ARRAY_SIZE(ldo45_voltage_map), | |
333 | .type = REGULATOR_VOLTAGE, | |
334 | .owner = THIS_MODULE, | |
335 | }, | |
336 | { | |
337 | .name = "LDO5", | |
338 | .id = LP3971_LDO5, | |
339 | .ops = &lp3971_ldo_ops, | |
340 | .n_voltages = ARRAY_SIZE(ldo45_voltage_map), | |
341 | .type = REGULATOR_VOLTAGE, | |
342 | .owner = THIS_MODULE, | |
343 | }, | |
344 | { | |
345 | .name = "DCDC1", | |
346 | .id = LP3971_DCDC1, | |
347 | .ops = &lp3971_dcdc_ops, | |
348 | .n_voltages = ARRAY_SIZE(buck_voltage_map), | |
349 | .type = REGULATOR_VOLTAGE, | |
350 | .owner = THIS_MODULE, | |
351 | }, | |
352 | { | |
353 | .name = "DCDC2", | |
354 | .id = LP3971_DCDC2, | |
355 | .ops = &lp3971_dcdc_ops, | |
356 | .n_voltages = ARRAY_SIZE(buck_voltage_map), | |
357 | .type = REGULATOR_VOLTAGE, | |
358 | .owner = THIS_MODULE, | |
359 | }, | |
360 | { | |
361 | .name = "DCDC3", | |
362 | .id = LP3971_DCDC3, | |
363 | .ops = &lp3971_dcdc_ops, | |
364 | .n_voltages = ARRAY_SIZE(buck_voltage_map), | |
365 | .type = REGULATOR_VOLTAGE, | |
366 | .owner = THIS_MODULE, | |
367 | }, | |
368 | }; | |
369 | ||
370 | static int lp3971_i2c_read(struct i2c_client *i2c, char reg, int count, | |
371 | u16 *dest) | |
372 | { | |
373 | int ret; | |
374 | ||
375 | if (count != 1) | |
376 | return -EIO; | |
377 | ret = i2c_smbus_read_byte_data(i2c, reg); | |
378 | if (ret < 0 || count != 1) | |
379 | return -EIO; | |
380 | ||
381 | *dest = ret; | |
382 | return 0; | |
383 | } | |
384 | ||
385 | static int lp3971_i2c_write(struct i2c_client *i2c, char reg, int count, | |
386 | const u16 *src) | |
387 | { | |
388 | int ret; | |
389 | ||
390 | if (count != 1) | |
391 | return -EIO; | |
392 | ret = i2c_smbus_write_byte_data(i2c, reg, *src); | |
393 | if (ret >= 0) | |
394 | return 0; | |
395 | ||
396 | return ret; | |
397 | } | |
398 | ||
399 | static u8 lp3971_reg_read(struct lp3971 *lp3971, u8 reg) | |
400 | { | |
401 | u16 val = 0; | |
402 | ||
403 | mutex_lock(&lp3971->io_lock); | |
404 | ||
405 | lp3971_i2c_read(lp3971->i2c, reg, 1, &val); | |
406 | ||
407 | dev_dbg(lp3971->dev, "reg read 0x%02x -> 0x%02x\n", (int)reg, | |
408 | (unsigned)val&0xff); | |
409 | ||
410 | mutex_unlock(&lp3971->io_lock); | |
411 | ||
412 | return val & 0xff; | |
413 | } | |
414 | ||
415 | static int lp3971_set_bits(struct lp3971 *lp3971, u8 reg, u16 mask, u16 val) | |
416 | { | |
417 | u16 tmp; | |
418 | int ret; | |
419 | ||
420 | mutex_lock(&lp3971->io_lock); | |
421 | ||
422 | ret = lp3971_i2c_read(lp3971->i2c, reg, 1, &tmp); | |
423 | tmp = (tmp & ~mask) | val; | |
424 | if (ret == 0) { | |
425 | ret = lp3971_i2c_write(lp3971->i2c, reg, 1, &tmp); | |
426 | dev_dbg(lp3971->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg, | |
427 | (unsigned)val&0xff); | |
428 | } | |
429 | mutex_unlock(&lp3971->io_lock); | |
430 | ||
431 | return ret; | |
432 | } | |
433 | ||
434 | static int setup_regulators(struct lp3971 *lp3971, | |
435 | struct lp3971_platform_data *pdata) | |
436 | { | |
437 | int i, err; | |
438 | int num_regulators = pdata->num_regulators; | |
439 | lp3971->num_regulators = num_regulators; | |
440 | lp3971->rdev = kzalloc(sizeof(struct regulator_dev *) * num_regulators, | |
441 | GFP_KERNEL); | |
442 | ||
443 | /* Instantiate the regulators */ | |
444 | for (i = 0; i < num_regulators; i++) { | |
445 | int id = pdata->regulators[i].id; | |
446 | lp3971->rdev[i] = regulator_register(®ulators[id], | |
447 | lp3971->dev, pdata->regulators[i].initdata, lp3971); | |
448 | ||
449 | err = IS_ERR(lp3971->rdev[i]); | |
450 | if (err) { | |
451 | dev_err(lp3971->dev, "regulator init failed: %d\n", | |
452 | err); | |
453 | goto error; | |
454 | } | |
455 | } | |
456 | ||
457 | return 0; | |
458 | error: | |
459 | for (i = 0; i < num_regulators; i++) | |
460 | if (lp3971->rdev[i]) | |
461 | regulator_unregister(lp3971->rdev[i]); | |
462 | kfree(lp3971->rdev); | |
463 | lp3971->rdev = NULL; | |
464 | return err; | |
465 | } | |
466 | ||
467 | static int __devinit lp3971_i2c_probe(struct i2c_client *i2c, | |
468 | const struct i2c_device_id *id) | |
469 | { | |
470 | struct lp3971 *lp3971; | |
471 | struct lp3971_platform_data *pdata = i2c->dev.platform_data; | |
472 | int ret; | |
473 | u16 val; | |
474 | ||
475 | lp3971 = kzalloc(sizeof(struct lp3971), GFP_KERNEL); | |
476 | if (lp3971 == NULL) { | |
477 | ret = -ENOMEM; | |
478 | goto err; | |
479 | } | |
480 | ||
481 | lp3971->i2c = i2c; | |
482 | lp3971->dev = &i2c->dev; | |
483 | i2c_set_clientdata(i2c, lp3971); | |
484 | ||
485 | mutex_init(&lp3971->io_lock); | |
486 | ||
487 | /* Detect LP3971 */ | |
488 | ret = lp3971_i2c_read(i2c, LP3971_SYS_CONTROL1_REG, 1, &val); | |
489 | if (ret == 0 && (val & SYS_CONTROL1_INIT_MASK) != SYS_CONTROL1_INIT_VAL) | |
490 | ret = -ENODEV; | |
491 | if (ret < 0) { | |
492 | dev_err(&i2c->dev, "failed to detect device\n"); | |
493 | goto err_detect; | |
494 | } | |
495 | ||
496 | if (pdata) { | |
497 | ret = setup_regulators(lp3971, pdata); | |
498 | if (ret < 0) | |
499 | goto err_detect; | |
500 | } else | |
501 | dev_warn(lp3971->dev, "No platform init data supplied\n"); | |
502 | ||
503 | return 0; | |
504 | ||
505 | err_detect: | |
506 | i2c_set_clientdata(i2c, NULL); | |
507 | kfree(lp3971); | |
508 | err: | |
509 | return ret; | |
510 | } | |
511 | ||
512 | static int __devexit lp3971_i2c_remove(struct i2c_client *i2c) | |
513 | { | |
514 | struct lp3971 *lp3971 = i2c_get_clientdata(i2c); | |
515 | int i; | |
516 | for (i = 0; i < lp3971->num_regulators; i++) | |
517 | if (lp3971->rdev[i]) | |
518 | regulator_unregister(lp3971->rdev[i]); | |
519 | kfree(lp3971->rdev); | |
520 | i2c_set_clientdata(i2c, NULL); | |
521 | kfree(lp3971); | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
526 | static const struct i2c_device_id lp3971_i2c_id[] = { | |
527 | { "lp3971", 0 }, | |
528 | { } | |
529 | }; | |
530 | MODULE_DEVICE_TABLE(i2c, lp3971_i2c_id); | |
531 | ||
532 | static struct i2c_driver lp3971_i2c_driver = { | |
533 | .driver = { | |
534 | .name = "LP3971", | |
535 | .owner = THIS_MODULE, | |
536 | }, | |
537 | .probe = lp3971_i2c_probe, | |
6113c3a5 | 538 | .remove = __devexit_p(lp3971_i2c_remove), |
0cbdf7bc MS |
539 | .id_table = lp3971_i2c_id, |
540 | }; | |
541 | ||
542 | static int __init lp3971_module_init(void) | |
543 | { | |
12a1d933 | 544 | int ret; |
0cbdf7bc MS |
545 | |
546 | ret = i2c_add_driver(&lp3971_i2c_driver); | |
547 | if (ret != 0) | |
548 | pr_err("Failed to register I2C driver: %d\n", ret); | |
549 | ||
550 | return ret; | |
551 | } | |
552 | module_init(lp3971_module_init); | |
553 | ||
554 | static void __exit lp3971_module_exit(void) | |
555 | { | |
556 | i2c_del_driver(&lp3971_i2c_driver); | |
557 | } | |
558 | module_exit(lp3971_module_exit); | |
559 | ||
560 | MODULE_LICENSE("GPL"); | |
561 | MODULE_AUTHOR("Marek Szyprowski <m.szyprowski@samsung.com>"); | |
562 | MODULE_DESCRIPTION("LP3971 PMIC driver"); |