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156f2528 KP |
1 | /* |
2 | * max8998.c - Voltage regulator driver for the Maxim 8998 | |
3 | * | |
4 | * Copyright (C) 2009-2010 Samsung Electronics | |
5 | * Kyungmin Park <kyungmin.park@samsung.com> | |
6 | * Marek Szyprowski <m.szyprowski@samsung.com> | |
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 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/i2c.h> | |
26 | #include <linux/err.h> | |
27 | #include <linux/gpio.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/mutex.h> | |
c5a4655d | 31 | #include <linux/delay.h> |
156f2528 KP |
32 | #include <linux/platform_device.h> |
33 | #include <linux/regulator/driver.h> | |
34 | #include <linux/mfd/max8998.h> | |
35 | #include <linux/mfd/max8998-private.h> | |
36 | ||
37 | struct max8998_data { | |
38 | struct device *dev; | |
39 | struct max8998_dev *iodev; | |
40 | int num_regulators; | |
41 | struct regulator_dev **rdev; | |
889cd5a6 LM |
42 | u8 buck1_vol[4]; /* voltages for selection */ |
43 | u8 buck2_vol[2]; | |
44 | unsigned int buck1_idx; /* index to last changed voltage */ | |
45 | /* value in a set */ | |
46 | unsigned int buck2_idx; | |
156f2528 KP |
47 | }; |
48 | ||
49 | struct voltage_map_desc { | |
50 | int min; | |
51 | int max; | |
52 | int step; | |
53 | }; | |
54 | ||
55 | /* Voltage maps */ | |
56 | static const struct voltage_map_desc ldo23_voltage_map_desc = { | |
57 | .min = 800, .step = 50, .max = 1300, | |
58 | }; | |
59 | static const struct voltage_map_desc ldo456711_voltage_map_desc = { | |
60 | .min = 1600, .step = 100, .max = 3600, | |
61 | }; | |
62 | static const struct voltage_map_desc ldo8_voltage_map_desc = { | |
63 | .min = 3000, .step = 100, .max = 3600, | |
64 | }; | |
65 | static const struct voltage_map_desc ldo9_voltage_map_desc = { | |
66 | .min = 2800, .step = 100, .max = 3100, | |
67 | }; | |
68 | static const struct voltage_map_desc ldo10_voltage_map_desc = { | |
69 | .min = 950, .step = 50, .max = 1300, | |
70 | }; | |
71 | static const struct voltage_map_desc ldo1213_voltage_map_desc = { | |
72 | .min = 800, .step = 100, .max = 3300, | |
73 | }; | |
74 | static const struct voltage_map_desc ldo1415_voltage_map_desc = { | |
75 | .min = 1200, .step = 100, .max = 3300, | |
76 | }; | |
77 | static const struct voltage_map_desc ldo1617_voltage_map_desc = { | |
78 | .min = 1600, .step = 100, .max = 3600, | |
79 | }; | |
80 | static const struct voltage_map_desc buck12_voltage_map_desc = { | |
81 | .min = 750, .step = 25, .max = 1525, | |
82 | }; | |
83 | static const struct voltage_map_desc buck3_voltage_map_desc = { | |
84 | .min = 1600, .step = 100, .max = 3600, | |
85 | }; | |
86 | static const struct voltage_map_desc buck4_voltage_map_desc = { | |
87 | .min = 800, .step = 100, .max = 2300, | |
88 | }; | |
89 | ||
90 | static const struct voltage_map_desc *ldo_voltage_map[] = { | |
91 | NULL, | |
92 | NULL, | |
93 | &ldo23_voltage_map_desc, /* LDO2 */ | |
94 | &ldo23_voltage_map_desc, /* LDO3 */ | |
95 | &ldo456711_voltage_map_desc, /* LDO4 */ | |
96 | &ldo456711_voltage_map_desc, /* LDO5 */ | |
97 | &ldo456711_voltage_map_desc, /* LDO6 */ | |
98 | &ldo456711_voltage_map_desc, /* LDO7 */ | |
99 | &ldo8_voltage_map_desc, /* LDO8 */ | |
100 | &ldo9_voltage_map_desc, /* LDO9 */ | |
101 | &ldo10_voltage_map_desc, /* LDO10 */ | |
102 | &ldo456711_voltage_map_desc, /* LDO11 */ | |
103 | &ldo1213_voltage_map_desc, /* LDO12 */ | |
104 | &ldo1213_voltage_map_desc, /* LDO13 */ | |
105 | &ldo1415_voltage_map_desc, /* LDO14 */ | |
106 | &ldo1415_voltage_map_desc, /* LDO15 */ | |
107 | &ldo1617_voltage_map_desc, /* LDO16 */ | |
108 | &ldo1617_voltage_map_desc, /* LDO17 */ | |
109 | &buck12_voltage_map_desc, /* BUCK1 */ | |
110 | &buck12_voltage_map_desc, /* BUCK2 */ | |
111 | &buck3_voltage_map_desc, /* BUCK3 */ | |
112 | &buck4_voltage_map_desc, /* BUCK4 */ | |
113 | }; | |
114 | ||
115 | static inline int max8998_get_ldo(struct regulator_dev *rdev) | |
116 | { | |
117 | return rdev_get_id(rdev); | |
118 | } | |
119 | ||
120 | static int max8998_list_voltage(struct regulator_dev *rdev, | |
121 | unsigned int selector) | |
122 | { | |
123 | const struct voltage_map_desc *desc; | |
124 | int ldo = max8998_get_ldo(rdev); | |
125 | int val; | |
126 | ||
1b69d8e3 | 127 | if (ldo >= ARRAY_SIZE(ldo_voltage_map)) |
156f2528 KP |
128 | return -EINVAL; |
129 | ||
130 | desc = ldo_voltage_map[ldo]; | |
131 | if (desc == NULL) | |
132 | return -EINVAL; | |
133 | ||
134 | val = desc->min + desc->step * selector; | |
135 | if (val > desc->max) | |
136 | return -EINVAL; | |
137 | ||
138 | return val * 1000; | |
139 | } | |
140 | ||
141 | static int max8998_get_enable_register(struct regulator_dev *rdev, | |
142 | int *reg, int *shift) | |
143 | { | |
144 | int ldo = max8998_get_ldo(rdev); | |
145 | ||
146 | switch (ldo) { | |
147 | case MAX8998_LDO2 ... MAX8998_LDO5: | |
148 | *reg = MAX8998_REG_ONOFF1; | |
149 | *shift = 3 - (ldo - MAX8998_LDO2); | |
150 | break; | |
151 | case MAX8998_LDO6 ... MAX8998_LDO13: | |
152 | *reg = MAX8998_REG_ONOFF2; | |
153 | *shift = 7 - (ldo - MAX8998_LDO6); | |
154 | break; | |
155 | case MAX8998_LDO14 ... MAX8998_LDO17: | |
156 | *reg = MAX8998_REG_ONOFF3; | |
157 | *shift = 7 - (ldo - MAX8998_LDO14); | |
158 | break; | |
159 | case MAX8998_BUCK1 ... MAX8998_BUCK4: | |
160 | *reg = MAX8998_REG_ONOFF1; | |
161 | *shift = 7 - (ldo - MAX8998_BUCK1); | |
162 | break; | |
163 | case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG: | |
164 | *reg = MAX8998_REG_ONOFF4; | |
165 | *shift = 7 - (ldo - MAX8998_EN32KHZ_AP); | |
166 | break; | |
167 | case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2: | |
168 | *reg = MAX8998_REG_CHGR2; | |
169 | *shift = 7 - (ldo - MAX8998_ESAFEOUT1); | |
170 | break; | |
171 | default: | |
172 | return -EINVAL; | |
173 | } | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
178 | static int max8998_ldo_is_enabled(struct regulator_dev *rdev) | |
179 | { | |
180 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 181 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
182 | int ret, reg, shift = 8; |
183 | u8 val; | |
184 | ||
185 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
186 | if (ret) | |
187 | return ret; | |
188 | ||
676e02d7 | 189 | ret = max8998_read_reg(i2c, reg, &val); |
156f2528 KP |
190 | if (ret) |
191 | return ret; | |
192 | ||
193 | return val & (1 << shift); | |
194 | } | |
195 | ||
196 | static int max8998_ldo_enable(struct regulator_dev *rdev) | |
197 | { | |
198 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 199 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
200 | int reg, shift = 8, ret; |
201 | ||
202 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
203 | if (ret) | |
204 | return ret; | |
205 | ||
676e02d7 | 206 | return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift); |
156f2528 KP |
207 | } |
208 | ||
209 | static int max8998_ldo_disable(struct regulator_dev *rdev) | |
210 | { | |
211 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 212 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
213 | int reg, shift = 8, ret; |
214 | ||
215 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
216 | if (ret) | |
217 | return ret; | |
218 | ||
676e02d7 | 219 | return max8998_update_reg(i2c, reg, 0, 1<<shift); |
156f2528 KP |
220 | } |
221 | ||
222 | static int max8998_get_voltage_register(struct regulator_dev *rdev, | |
223 | int *_reg, int *_shift, int *_mask) | |
224 | { | |
225 | int ldo = max8998_get_ldo(rdev); | |
889cd5a6 | 226 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
156f2528 KP |
227 | int reg, shift = 0, mask = 0xff; |
228 | ||
229 | switch (ldo) { | |
230 | case MAX8998_LDO2 ... MAX8998_LDO3: | |
231 | reg = MAX8998_REG_LDO2_LDO3; | |
232 | mask = 0xf; | |
233 | if (ldo == MAX8998_LDO2) | |
234 | shift = 4; | |
235 | else | |
236 | shift = 0; | |
237 | break; | |
238 | case MAX8998_LDO4 ... MAX8998_LDO7: | |
239 | reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4); | |
240 | break; | |
241 | case MAX8998_LDO8 ... MAX8998_LDO9: | |
242 | reg = MAX8998_REG_LDO8_LDO9; | |
243 | mask = 0xf; | |
244 | if (ldo == MAX8998_LDO8) | |
245 | shift = 4; | |
246 | else | |
247 | shift = 0; | |
248 | break; | |
249 | case MAX8998_LDO10 ... MAX8998_LDO11: | |
250 | reg = MAX8998_REG_LDO10_LDO11; | |
251 | if (ldo == MAX8998_LDO10) { | |
252 | shift = 5; | |
253 | mask = 0x7; | |
254 | } else { | |
255 | shift = 0; | |
256 | mask = 0x1f; | |
257 | } | |
258 | break; | |
259 | case MAX8998_LDO12 ... MAX8998_LDO17: | |
260 | reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12); | |
261 | break; | |
262 | case MAX8998_BUCK1: | |
889cd5a6 | 263 | reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx; |
156f2528 KP |
264 | break; |
265 | case MAX8998_BUCK2: | |
889cd5a6 | 266 | reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx; |
156f2528 KP |
267 | break; |
268 | case MAX8998_BUCK3: | |
269 | reg = MAX8998_REG_BUCK3; | |
270 | break; | |
271 | case MAX8998_BUCK4: | |
272 | reg = MAX8998_REG_BUCK4; | |
273 | break; | |
274 | default: | |
275 | return -EINVAL; | |
276 | } | |
277 | ||
278 | *_reg = reg; | |
279 | *_shift = shift; | |
280 | *_mask = mask; | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | static int max8998_get_voltage(struct regulator_dev *rdev) | |
286 | { | |
287 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 288 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
289 | int reg, shift = 0, mask, ret; |
290 | u8 val; | |
291 | ||
292 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); | |
293 | if (ret) | |
294 | return ret; | |
295 | ||
676e02d7 | 296 | ret = max8998_read_reg(i2c, reg, &val); |
156f2528 KP |
297 | if (ret) |
298 | return ret; | |
299 | ||
300 | val >>= shift; | |
301 | val &= mask; | |
302 | ||
303 | return max8998_list_voltage(rdev, val); | |
304 | } | |
305 | ||
9d92492f | 306 | static int max8998_set_voltage_ldo(struct regulator_dev *rdev, |
3a93f2a9 | 307 | int min_uV, int max_uV, unsigned *selector) |
9d92492f LM |
308 | { |
309 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
310 | struct i2c_client *i2c = max8998->iodev->i2c; | |
311 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
312 | const struct voltage_map_desc *desc; | |
313 | int ldo = max8998_get_ldo(rdev); | |
314 | int reg, shift = 0, mask, ret; | |
315 | int i = 0; | |
316 | ||
317 | if (ldo >= ARRAY_SIZE(ldo_voltage_map)) | |
318 | return -EINVAL; | |
319 | ||
320 | desc = ldo_voltage_map[ldo]; | |
321 | if (desc == NULL) | |
322 | return -EINVAL; | |
323 | ||
324 | if (max_vol < desc->min || min_vol > desc->max) | |
325 | return -EINVAL; | |
326 | ||
327 | while (desc->min + desc->step*i < min_vol && | |
328 | desc->min + desc->step*i < desc->max) | |
329 | i++; | |
330 | ||
331 | if (desc->min + desc->step*i > max_vol) | |
332 | return -EINVAL; | |
333 | ||
3a93f2a9 MB |
334 | *selector = i; |
335 | ||
9d92492f LM |
336 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
337 | if (ret) | |
338 | return ret; | |
339 | ||
340 | ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift); | |
341 | ||
342 | return ret; | |
343 | } | |
344 | ||
50f19a45 LM |
345 | static inline void buck1_gpio_set(int gpio1, int gpio2, int v) |
346 | { | |
347 | gpio_set_value(gpio1, v & 0x1); | |
348 | gpio_set_value(gpio2, (v >> 1) & 0x1); | |
349 | } | |
350 | ||
351 | static inline void buck2_gpio_set(int gpio, int v) | |
352 | { | |
353 | gpio_set_value(gpio, v & 0x1); | |
354 | } | |
355 | ||
9d92492f | 356 | static int max8998_set_voltage_buck(struct regulator_dev *rdev, |
f4d6adf1 | 357 | int min_uV, int max_uV, unsigned *selector) |
156f2528 KP |
358 | { |
359 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
50f19a45 LM |
360 | struct max8998_platform_data *pdata = |
361 | dev_get_platdata(max8998->iodev->dev); | |
676e02d7 | 362 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
363 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; |
364 | const struct voltage_map_desc *desc; | |
50f19a45 | 365 | int buck = max8998_get_ldo(rdev); |
156f2528 | 366 | int reg, shift = 0, mask, ret; |
50f19a45 LM |
367 | int difference = 0, i = 0, j = 0, previous_vol = 0; |
368 | u8 val = 0; | |
369 | static u8 buck1_last_val; | |
156f2528 | 370 | |
50f19a45 | 371 | if (buck >= ARRAY_SIZE(ldo_voltage_map)) |
156f2528 KP |
372 | return -EINVAL; |
373 | ||
50f19a45 LM |
374 | desc = ldo_voltage_map[buck]; |
375 | ||
156f2528 KP |
376 | if (desc == NULL) |
377 | return -EINVAL; | |
378 | ||
379 | if (max_vol < desc->min || min_vol > desc->max) | |
380 | return -EINVAL; | |
381 | ||
c5a4655d | 382 | while (desc->min + desc->step*i < min_vol && |
156f2528 KP |
383 | desc->min + desc->step*i < desc->max) |
384 | i++; | |
385 | ||
c5a4655d MH |
386 | if (desc->min + desc->step*i > max_vol) |
387 | return -EINVAL; | |
388 | ||
3a93f2a9 MB |
389 | *selector = i; |
390 | ||
156f2528 KP |
391 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
392 | if (ret) | |
393 | return ret; | |
394 | ||
50f19a45 LM |
395 | previous_vol = max8998_get_voltage(rdev); |
396 | ||
397 | /* Check if voltage needs to be changed */ | |
398 | /* if previous_voltage equal new voltage, return */ | |
399 | if (previous_vol == max8998_list_voltage(rdev, i)) { | |
400 | dev_dbg(max8998->dev, "No voltage change, old:%d, new:%d\n", | |
401 | previous_vol, max8998_list_voltage(rdev, i)); | |
402 | return ret; | |
c5a4655d MH |
403 | } |
404 | ||
50f19a45 LM |
405 | switch (buck) { |
406 | case MAX8998_BUCK1: | |
407 | dev_dbg(max8998->dev, | |
408 | "BUCK1, i:%d, buck1_vol1:%d, buck1_vol2:%d\n\ | |
409 | buck1_vol3:%d, buck1_vol4:%d\n", | |
410 | i, max8998->buck1_vol[0], max8998->buck1_vol[1], | |
411 | max8998->buck1_vol[2], max8998->buck1_vol[3]); | |
412 | ||
413 | if (gpio_is_valid(pdata->buck1_set1) && | |
414 | gpio_is_valid(pdata->buck1_set2)) { | |
415 | ||
416 | /* check if requested voltage */ | |
417 | /* value is already defined */ | |
418 | for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) { | |
419 | if (max8998->buck1_vol[j] == i) { | |
420 | max8998->buck1_idx = j; | |
421 | buck1_gpio_set(pdata->buck1_set1, | |
422 | pdata->buck1_set2, j); | |
423 | goto buck1_exit; | |
424 | } | |
425 | } | |
426 | ||
735a3d9e MH |
427 | if (pdata->buck_voltage_lock) |
428 | return -EINVAL; | |
429 | ||
50f19a45 LM |
430 | /* no predefine regulator found */ |
431 | max8998->buck1_idx = (buck1_last_val % 2) + 2; | |
432 | dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n", | |
433 | max8998->buck1_idx); | |
434 | max8998->buck1_vol[max8998->buck1_idx] = i; | |
435 | ret = max8998_get_voltage_register(rdev, ®, | |
436 | &shift, | |
437 | &mask); | |
438 | ret = max8998_write_reg(i2c, reg, i); | |
439 | buck1_gpio_set(pdata->buck1_set1, | |
440 | pdata->buck1_set2, max8998->buck1_idx); | |
441 | buck1_last_val++; | |
442 | buck1_exit: | |
443 | dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n", | |
444 | i2c->name, gpio_get_value(pdata->buck1_set1), | |
445 | gpio_get_value(pdata->buck1_set2)); | |
446 | break; | |
447 | } else { | |
448 | ret = max8998_write_reg(i2c, reg, i); | |
449 | } | |
450 | break; | |
c5a4655d | 451 | |
50f19a45 LM |
452 | case MAX8998_BUCK2: |
453 | dev_dbg(max8998->dev, | |
454 | "BUCK2, i:%d buck2_vol1:%d, buck2_vol2:%d\n" | |
455 | , i, max8998->buck2_vol[0], max8998->buck2_vol[1]); | |
456 | if (gpio_is_valid(pdata->buck2_set3)) { | |
735a3d9e MH |
457 | |
458 | /* check if requested voltage */ | |
459 | /* value is already defined */ | |
460 | for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) { | |
461 | if (max8998->buck2_vol[j] == i) { | |
462 | max8998->buck2_idx = j; | |
463 | buck2_gpio_set(pdata->buck2_set3, j); | |
464 | goto buck2_exit; | |
465 | } | |
50f19a45 | 466 | } |
735a3d9e MH |
467 | |
468 | if (pdata->buck_voltage_lock) | |
469 | return -EINVAL; | |
470 | ||
471 | max8998_get_voltage_register(rdev, | |
472 | ®, &shift, &mask); | |
473 | ret = max8998_write_reg(i2c, reg, i); | |
474 | max8998->buck2_vol[max8998->buck2_idx] = i; | |
475 | buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx); | |
476 | buck2_exit: | |
50f19a45 LM |
477 | dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name, |
478 | gpio_get_value(pdata->buck2_set3)); | |
479 | } else { | |
480 | ret = max8998_write_reg(i2c, reg, i); | |
481 | } | |
482 | break; | |
483 | ||
484 | case MAX8998_BUCK3: | |
485 | case MAX8998_BUCK4: | |
486 | ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift); | |
487 | break; | |
c5a4655d MH |
488 | } |
489 | ||
50f19a45 LM |
490 | /* Voltage stabilization */ |
491 | max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val); | |
492 | ||
493 | /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */ | |
494 | /* MAX8998 has ENRAMP bit implemented, so test it*/ | |
495 | if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP)) | |
496 | return ret; | |
497 | ||
498 | difference = desc->min + desc->step*i - previous_vol/1000; | |
499 | if (difference > 0) | |
500 | udelay(difference / ((val & 0x0f) + 1)); | |
501 | ||
c5a4655d | 502 | return ret; |
156f2528 KP |
503 | } |
504 | ||
505 | static struct regulator_ops max8998_ldo_ops = { | |
506 | .list_voltage = max8998_list_voltage, | |
507 | .is_enabled = max8998_ldo_is_enabled, | |
508 | .enable = max8998_ldo_enable, | |
509 | .disable = max8998_ldo_disable, | |
510 | .get_voltage = max8998_get_voltage, | |
9d92492f | 511 | .set_voltage = max8998_set_voltage_ldo, |
156f2528 KP |
512 | .set_suspend_enable = max8998_ldo_enable, |
513 | .set_suspend_disable = max8998_ldo_disable, | |
514 | }; | |
515 | ||
516 | static struct regulator_ops max8998_buck_ops = { | |
517 | .list_voltage = max8998_list_voltage, | |
518 | .is_enabled = max8998_ldo_is_enabled, | |
519 | .enable = max8998_ldo_enable, | |
520 | .disable = max8998_ldo_disable, | |
521 | .get_voltage = max8998_get_voltage, | |
9d92492f | 522 | .set_voltage = max8998_set_voltage_buck, |
156f2528 KP |
523 | .set_suspend_enable = max8998_ldo_enable, |
524 | .set_suspend_disable = max8998_ldo_disable, | |
525 | }; | |
526 | ||
527 | static struct regulator_ops max8998_others_ops = { | |
528 | .is_enabled = max8998_ldo_is_enabled, | |
529 | .enable = max8998_ldo_enable, | |
530 | .disable = max8998_ldo_disable, | |
531 | .set_suspend_enable = max8998_ldo_enable, | |
532 | .set_suspend_disable = max8998_ldo_disable, | |
533 | }; | |
534 | ||
535 | static struct regulator_desc regulators[] = { | |
536 | { | |
537 | .name = "LDO2", | |
538 | .id = MAX8998_LDO2, | |
539 | .ops = &max8998_ldo_ops, | |
540 | .type = REGULATOR_VOLTAGE, | |
541 | .owner = THIS_MODULE, | |
542 | }, { | |
543 | .name = "LDO3", | |
544 | .id = MAX8998_LDO3, | |
545 | .ops = &max8998_ldo_ops, | |
546 | .type = REGULATOR_VOLTAGE, | |
547 | .owner = THIS_MODULE, | |
548 | }, { | |
549 | .name = "LDO4", | |
550 | .id = MAX8998_LDO4, | |
551 | .ops = &max8998_ldo_ops, | |
552 | .type = REGULATOR_VOLTAGE, | |
553 | .owner = THIS_MODULE, | |
554 | }, { | |
555 | .name = "LDO5", | |
556 | .id = MAX8998_LDO5, | |
557 | .ops = &max8998_ldo_ops, | |
558 | .type = REGULATOR_VOLTAGE, | |
559 | .owner = THIS_MODULE, | |
560 | }, { | |
561 | .name = "LDO6", | |
562 | .id = MAX8998_LDO6, | |
563 | .ops = &max8998_ldo_ops, | |
564 | .type = REGULATOR_VOLTAGE, | |
565 | .owner = THIS_MODULE, | |
566 | }, { | |
567 | .name = "LDO7", | |
568 | .id = MAX8998_LDO7, | |
569 | .ops = &max8998_ldo_ops, | |
570 | .type = REGULATOR_VOLTAGE, | |
571 | .owner = THIS_MODULE, | |
572 | }, { | |
573 | .name = "LDO8", | |
574 | .id = MAX8998_LDO8, | |
575 | .ops = &max8998_ldo_ops, | |
576 | .type = REGULATOR_VOLTAGE, | |
577 | .owner = THIS_MODULE, | |
578 | }, { | |
579 | .name = "LDO9", | |
580 | .id = MAX8998_LDO9, | |
581 | .ops = &max8998_ldo_ops, | |
582 | .type = REGULATOR_VOLTAGE, | |
583 | .owner = THIS_MODULE, | |
584 | }, { | |
585 | .name = "LDO10", | |
586 | .id = MAX8998_LDO10, | |
587 | .ops = &max8998_ldo_ops, | |
588 | .type = REGULATOR_VOLTAGE, | |
589 | .owner = THIS_MODULE, | |
590 | }, { | |
591 | .name = "LDO11", | |
592 | .id = MAX8998_LDO11, | |
593 | .ops = &max8998_ldo_ops, | |
594 | .type = REGULATOR_VOLTAGE, | |
595 | .owner = THIS_MODULE, | |
596 | }, { | |
597 | .name = "LDO12", | |
598 | .id = MAX8998_LDO12, | |
599 | .ops = &max8998_ldo_ops, | |
600 | .type = REGULATOR_VOLTAGE, | |
601 | .owner = THIS_MODULE, | |
602 | }, { | |
603 | .name = "LDO13", | |
604 | .id = MAX8998_LDO13, | |
605 | .ops = &max8998_ldo_ops, | |
606 | .type = REGULATOR_VOLTAGE, | |
607 | .owner = THIS_MODULE, | |
608 | }, { | |
609 | .name = "LDO14", | |
610 | .id = MAX8998_LDO14, | |
611 | .ops = &max8998_ldo_ops, | |
612 | .type = REGULATOR_VOLTAGE, | |
613 | .owner = THIS_MODULE, | |
614 | }, { | |
615 | .name = "LDO15", | |
616 | .id = MAX8998_LDO15, | |
617 | .ops = &max8998_ldo_ops, | |
618 | .type = REGULATOR_VOLTAGE, | |
619 | .owner = THIS_MODULE, | |
620 | }, { | |
621 | .name = "LDO16", | |
622 | .id = MAX8998_LDO16, | |
623 | .ops = &max8998_ldo_ops, | |
624 | .type = REGULATOR_VOLTAGE, | |
625 | .owner = THIS_MODULE, | |
626 | }, { | |
627 | .name = "LDO17", | |
628 | .id = MAX8998_LDO17, | |
629 | .ops = &max8998_ldo_ops, | |
630 | .type = REGULATOR_VOLTAGE, | |
631 | .owner = THIS_MODULE, | |
632 | }, { | |
633 | .name = "BUCK1", | |
634 | .id = MAX8998_BUCK1, | |
635 | .ops = &max8998_buck_ops, | |
636 | .type = REGULATOR_VOLTAGE, | |
637 | .owner = THIS_MODULE, | |
638 | }, { | |
639 | .name = "BUCK2", | |
640 | .id = MAX8998_BUCK2, | |
641 | .ops = &max8998_buck_ops, | |
642 | .type = REGULATOR_VOLTAGE, | |
643 | .owner = THIS_MODULE, | |
644 | }, { | |
645 | .name = "BUCK3", | |
646 | .id = MAX8998_BUCK3, | |
647 | .ops = &max8998_buck_ops, | |
648 | .type = REGULATOR_VOLTAGE, | |
649 | .owner = THIS_MODULE, | |
650 | }, { | |
651 | .name = "BUCK4", | |
652 | .id = MAX8998_BUCK4, | |
653 | .ops = &max8998_buck_ops, | |
654 | .type = REGULATOR_VOLTAGE, | |
655 | .owner = THIS_MODULE, | |
656 | }, { | |
657 | .name = "EN32KHz AP", | |
658 | .id = MAX8998_EN32KHZ_AP, | |
659 | .ops = &max8998_others_ops, | |
660 | .type = REGULATOR_VOLTAGE, | |
661 | .owner = THIS_MODULE, | |
662 | }, { | |
663 | .name = "EN32KHz CP", | |
664 | .id = MAX8998_EN32KHZ_CP, | |
665 | .ops = &max8998_others_ops, | |
666 | .type = REGULATOR_VOLTAGE, | |
667 | .owner = THIS_MODULE, | |
668 | }, { | |
669 | .name = "ENVICHG", | |
670 | .id = MAX8998_ENVICHG, | |
671 | .ops = &max8998_others_ops, | |
672 | .type = REGULATOR_VOLTAGE, | |
673 | .owner = THIS_MODULE, | |
674 | }, { | |
675 | .name = "ESAFEOUT1", | |
676 | .id = MAX8998_ESAFEOUT1, | |
677 | .ops = &max8998_others_ops, | |
678 | .type = REGULATOR_VOLTAGE, | |
679 | .owner = THIS_MODULE, | |
680 | }, { | |
681 | .name = "ESAFEOUT2", | |
682 | .id = MAX8998_ESAFEOUT2, | |
683 | .ops = &max8998_others_ops, | |
684 | .type = REGULATOR_VOLTAGE, | |
685 | .owner = THIS_MODULE, | |
686 | } | |
687 | }; | |
688 | ||
689 | static __devinit int max8998_pmic_probe(struct platform_device *pdev) | |
690 | { | |
691 | struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
692 | struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev); | |
693 | struct regulator_dev **rdev; | |
694 | struct max8998_data *max8998; | |
50f19a45 | 695 | struct i2c_client *i2c; |
156f2528 KP |
696 | int i, ret, size; |
697 | ||
698 | if (!pdata) { | |
699 | dev_err(pdev->dev.parent, "No platform init data supplied\n"); | |
700 | return -ENODEV; | |
701 | } | |
702 | ||
703 | max8998 = kzalloc(sizeof(struct max8998_data), GFP_KERNEL); | |
704 | if (!max8998) | |
705 | return -ENOMEM; | |
706 | ||
11fa0d1d | 707 | size = sizeof(struct regulator_dev *) * pdata->num_regulators; |
156f2528 KP |
708 | max8998->rdev = kzalloc(size, GFP_KERNEL); |
709 | if (!max8998->rdev) { | |
710 | kfree(max8998); | |
711 | return -ENOMEM; | |
712 | } | |
713 | ||
714 | rdev = max8998->rdev; | |
747cc851 | 715 | max8998->dev = &pdev->dev; |
156f2528 | 716 | max8998->iodev = iodev; |
c356cbc2 | 717 | max8998->num_regulators = pdata->num_regulators; |
156f2528 | 718 | platform_set_drvdata(pdev, max8998); |
50f19a45 LM |
719 | i2c = max8998->iodev->i2c; |
720 | ||
735a3d9e MH |
721 | max8998->buck1_idx = pdata->buck1_default_idx; |
722 | max8998->buck2_idx = pdata->buck2_default_idx; | |
723 | ||
50f19a45 LM |
724 | /* NOTE: */ |
725 | /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */ | |
726 | /* will be displayed */ | |
727 | ||
728 | /* Check if MAX8998 voltage selection GPIOs are defined */ | |
729 | if (gpio_is_valid(pdata->buck1_set1) && | |
730 | gpio_is_valid(pdata->buck1_set2)) { | |
731 | /* Check if SET1 is not equal to 0 */ | |
732 | if (!pdata->buck1_set1) { | |
733 | printk(KERN_ERR "MAX8998 SET1 GPIO defined as 0 !\n"); | |
734 | WARN_ON(!pdata->buck1_set1); | |
735 | return -EIO; | |
736 | } | |
737 | /* Check if SET2 is not equal to 0 */ | |
738 | if (!pdata->buck1_set2) { | |
739 | printk(KERN_ERR "MAX8998 SET2 GPIO defined as 0 !\n"); | |
740 | WARN_ON(!pdata->buck1_set2); | |
741 | return -EIO; | |
742 | } | |
743 | ||
744 | gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1"); | |
745 | gpio_direction_output(pdata->buck1_set1, | |
746 | max8998->buck1_idx & 0x1); | |
747 | ||
748 | ||
749 | gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2"); | |
750 | gpio_direction_output(pdata->buck1_set2, | |
751 | (max8998->buck1_idx >> 1) & 0x1); | |
752 | /* Set predefined value for BUCK1 register 1 */ | |
753 | i = 0; | |
754 | while (buck12_voltage_map_desc.min + | |
755 | buck12_voltage_map_desc.step*i | |
735a3d9e | 756 | < (pdata->buck1_voltage1 / 1000)) |
50f19a45 | 757 | i++; |
50f19a45 LM |
758 | max8998->buck1_vol[0] = i; |
759 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1, i); | |
735a3d9e MH |
760 | if (ret) |
761 | return ret; | |
50f19a45 LM |
762 | |
763 | /* Set predefined value for BUCK1 register 2 */ | |
764 | i = 0; | |
765 | while (buck12_voltage_map_desc.min + | |
766 | buck12_voltage_map_desc.step*i | |
735a3d9e | 767 | < (pdata->buck1_voltage2 / 1000)) |
50f19a45 LM |
768 | i++; |
769 | ||
770 | max8998->buck1_vol[1] = i; | |
735a3d9e MH |
771 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE2, i); |
772 | if (ret) | |
773 | return ret; | |
774 | ||
775 | /* Set predefined value for BUCK1 register 3 */ | |
776 | i = 0; | |
777 | while (buck12_voltage_map_desc.min + | |
778 | buck12_voltage_map_desc.step*i | |
779 | < (pdata->buck1_voltage3 / 1000)) | |
780 | i++; | |
781 | ||
782 | max8998->buck1_vol[2] = i; | |
783 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE3, i); | |
784 | if (ret) | |
785 | return ret; | |
786 | ||
787 | /* Set predefined value for BUCK1 register 4 */ | |
788 | i = 0; | |
789 | while (buck12_voltage_map_desc.min + | |
790 | buck12_voltage_map_desc.step*i | |
791 | < (pdata->buck1_voltage4 / 1000)) | |
792 | i++; | |
793 | ||
794 | max8998->buck1_vol[3] = i; | |
795 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE4, i); | |
50f19a45 LM |
796 | if (ret) |
797 | return ret; | |
798 | ||
799 | } | |
800 | ||
801 | if (gpio_is_valid(pdata->buck2_set3)) { | |
802 | /* Check if SET3 is not equal to 0 */ | |
803 | if (!pdata->buck2_set3) { | |
804 | printk(KERN_ERR "MAX8998 SET3 GPIO defined as 0 !\n"); | |
805 | WARN_ON(!pdata->buck2_set3); | |
806 | return -EIO; | |
807 | } | |
808 | gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3"); | |
809 | gpio_direction_output(pdata->buck2_set3, | |
810 | max8998->buck2_idx & 0x1); | |
811 | ||
735a3d9e | 812 | /* BUCK2 register 1 */ |
50f19a45 LM |
813 | i = 0; |
814 | while (buck12_voltage_map_desc.min + | |
815 | buck12_voltage_map_desc.step*i | |
735a3d9e | 816 | < (pdata->buck2_voltage1 / 1000)) |
50f19a45 | 817 | i++; |
50f19a45 LM |
818 | max8998->buck2_vol[0] = i; |
819 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1, i); | |
820 | if (ret) | |
821 | return ret; | |
822 | ||
735a3d9e MH |
823 | /* BUCK2 register 2 */ |
824 | i = 0; | |
825 | while (buck12_voltage_map_desc.min + | |
826 | buck12_voltage_map_desc.step*i | |
827 | < (pdata->buck2_voltage2 / 1000)) | |
828 | i++; | |
829 | printk(KERN_ERR "i2:%d, buck2_idx:%d\n", i, max8998->buck2_idx); | |
830 | max8998->buck2_vol[1] = i; | |
831 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE2, i); | |
832 | if (ret) | |
833 | return ret; | |
50f19a45 | 834 | } |
156f2528 KP |
835 | |
836 | for (i = 0; i < pdata->num_regulators; i++) { | |
837 | const struct voltage_map_desc *desc; | |
838 | int id = pdata->regulators[i].id; | |
839 | int index = id - MAX8998_LDO2; | |
840 | ||
841 | desc = ldo_voltage_map[id]; | |
842 | if (desc && regulators[index].ops != &max8998_others_ops) { | |
843 | int count = (desc->max - desc->min) / desc->step + 1; | |
844 | regulators[index].n_voltages = count; | |
845 | } | |
846 | rdev[i] = regulator_register(®ulators[index], max8998->dev, | |
847 | pdata->regulators[i].initdata, max8998); | |
848 | if (IS_ERR(rdev[i])) { | |
849 | ret = PTR_ERR(rdev[i]); | |
850 | dev_err(max8998->dev, "regulator init failed\n"); | |
851 | rdev[i] = NULL; | |
852 | goto err; | |
853 | } | |
854 | } | |
855 | ||
856 | ||
857 | return 0; | |
858 | err: | |
11fa0d1d | 859 | for (i = 0; i < max8998->num_regulators; i++) |
156f2528 KP |
860 | if (rdev[i]) |
861 | regulator_unregister(rdev[i]); | |
862 | ||
863 | kfree(max8998->rdev); | |
864 | kfree(max8998); | |
865 | ||
866 | return ret; | |
867 | } | |
868 | ||
869 | static int __devexit max8998_pmic_remove(struct platform_device *pdev) | |
870 | { | |
871 | struct max8998_data *max8998 = platform_get_drvdata(pdev); | |
872 | struct regulator_dev **rdev = max8998->rdev; | |
873 | int i; | |
874 | ||
11fa0d1d | 875 | for (i = 0; i < max8998->num_regulators; i++) |
156f2528 KP |
876 | if (rdev[i]) |
877 | regulator_unregister(rdev[i]); | |
878 | ||
879 | kfree(max8998->rdev); | |
880 | kfree(max8998); | |
881 | ||
882 | return 0; | |
883 | } | |
884 | ||
337ce5d1 MH |
885 | static const struct platform_device_id max8998_pmic_id[] = { |
886 | { "max8998-pmic", TYPE_MAX8998 }, | |
887 | { "lp3974-pmic", TYPE_LP3974 }, | |
888 | { } | |
889 | }; | |
a51b907b | 890 | MODULE_DEVICE_TABLE(platform, max8998_pmic_id); |
337ce5d1 | 891 | |
156f2528 KP |
892 | static struct platform_driver max8998_pmic_driver = { |
893 | .driver = { | |
894 | .name = "max8998-pmic", | |
895 | .owner = THIS_MODULE, | |
896 | }, | |
897 | .probe = max8998_pmic_probe, | |
898 | .remove = __devexit_p(max8998_pmic_remove), | |
337ce5d1 | 899 | .id_table = max8998_pmic_id, |
156f2528 KP |
900 | }; |
901 | ||
902 | static int __init max8998_pmic_init(void) | |
903 | { | |
904 | return platform_driver_register(&max8998_pmic_driver); | |
905 | } | |
906 | subsys_initcall(max8998_pmic_init); | |
907 | ||
908 | static void __exit max8998_pmic_cleanup(void) | |
909 | { | |
910 | platform_driver_unregister(&max8998_pmic_driver); | |
911 | } | |
912 | module_exit(max8998_pmic_cleanup); | |
913 | ||
914 | MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver"); | |
915 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | |
916 | MODULE_LICENSE("GPL"); |