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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> | |
31 | #include <linux/platform_device.h> | |
32 | #include <linux/regulator/driver.h> | |
33 | #include <linux/mfd/max8998.h> | |
34 | #include <linux/mfd/max8998-private.h> | |
35 | ||
36 | struct max8998_data { | |
37 | struct device *dev; | |
38 | struct max8998_dev *iodev; | |
39 | int num_regulators; | |
40 | struct regulator_dev **rdev; | |
889cd5a6 LM |
41 | u8 buck1_vol[4]; /* voltages for selection */ |
42 | u8 buck2_vol[2]; | |
43 | unsigned int buck1_idx; /* index to last changed voltage */ | |
44 | /* value in a set */ | |
45 | unsigned int buck2_idx; | |
156f2528 KP |
46 | }; |
47 | ||
48 | struct voltage_map_desc { | |
49 | int min; | |
50 | int max; | |
51 | int step; | |
52 | }; | |
53 | ||
54 | /* Voltage maps */ | |
55 | static const struct voltage_map_desc ldo23_voltage_map_desc = { | |
56 | .min = 800, .step = 50, .max = 1300, | |
57 | }; | |
58 | static const struct voltage_map_desc ldo456711_voltage_map_desc = { | |
59 | .min = 1600, .step = 100, .max = 3600, | |
60 | }; | |
61 | static const struct voltage_map_desc ldo8_voltage_map_desc = { | |
62 | .min = 3000, .step = 100, .max = 3600, | |
63 | }; | |
64 | static const struct voltage_map_desc ldo9_voltage_map_desc = { | |
65 | .min = 2800, .step = 100, .max = 3100, | |
66 | }; | |
67 | static const struct voltage_map_desc ldo10_voltage_map_desc = { | |
68 | .min = 950, .step = 50, .max = 1300, | |
69 | }; | |
70 | static const struct voltage_map_desc ldo1213_voltage_map_desc = { | |
71 | .min = 800, .step = 100, .max = 3300, | |
72 | }; | |
73 | static const struct voltage_map_desc ldo1415_voltage_map_desc = { | |
74 | .min = 1200, .step = 100, .max = 3300, | |
75 | }; | |
76 | static const struct voltage_map_desc ldo1617_voltage_map_desc = { | |
77 | .min = 1600, .step = 100, .max = 3600, | |
78 | }; | |
79 | static const struct voltage_map_desc buck12_voltage_map_desc = { | |
80 | .min = 750, .step = 25, .max = 1525, | |
81 | }; | |
82 | static const struct voltage_map_desc buck3_voltage_map_desc = { | |
83 | .min = 1600, .step = 100, .max = 3600, | |
84 | }; | |
85 | static const struct voltage_map_desc buck4_voltage_map_desc = { | |
86 | .min = 800, .step = 100, .max = 2300, | |
87 | }; | |
88 | ||
89 | static const struct voltage_map_desc *ldo_voltage_map[] = { | |
90 | NULL, | |
91 | NULL, | |
92 | &ldo23_voltage_map_desc, /* LDO2 */ | |
93 | &ldo23_voltage_map_desc, /* LDO3 */ | |
94 | &ldo456711_voltage_map_desc, /* LDO4 */ | |
95 | &ldo456711_voltage_map_desc, /* LDO5 */ | |
96 | &ldo456711_voltage_map_desc, /* LDO6 */ | |
97 | &ldo456711_voltage_map_desc, /* LDO7 */ | |
98 | &ldo8_voltage_map_desc, /* LDO8 */ | |
99 | &ldo9_voltage_map_desc, /* LDO9 */ | |
100 | &ldo10_voltage_map_desc, /* LDO10 */ | |
101 | &ldo456711_voltage_map_desc, /* LDO11 */ | |
102 | &ldo1213_voltage_map_desc, /* LDO12 */ | |
103 | &ldo1213_voltage_map_desc, /* LDO13 */ | |
104 | &ldo1415_voltage_map_desc, /* LDO14 */ | |
105 | &ldo1415_voltage_map_desc, /* LDO15 */ | |
106 | &ldo1617_voltage_map_desc, /* LDO16 */ | |
107 | &ldo1617_voltage_map_desc, /* LDO17 */ | |
108 | &buck12_voltage_map_desc, /* BUCK1 */ | |
109 | &buck12_voltage_map_desc, /* BUCK2 */ | |
110 | &buck3_voltage_map_desc, /* BUCK3 */ | |
111 | &buck4_voltage_map_desc, /* BUCK4 */ | |
112 | }; | |
113 | ||
156f2528 KP |
114 | static int max8998_list_voltage(struct regulator_dev *rdev, |
115 | unsigned int selector) | |
116 | { | |
117 | const struct voltage_map_desc *desc; | |
7b94791b | 118 | int ldo = rdev_get_id(rdev); |
156f2528 KP |
119 | int val; |
120 | ||
1b69d8e3 | 121 | if (ldo >= ARRAY_SIZE(ldo_voltage_map)) |
156f2528 KP |
122 | return -EINVAL; |
123 | ||
124 | desc = ldo_voltage_map[ldo]; | |
125 | if (desc == NULL) | |
126 | return -EINVAL; | |
127 | ||
128 | val = desc->min + desc->step * selector; | |
129 | if (val > desc->max) | |
130 | return -EINVAL; | |
131 | ||
132 | return val * 1000; | |
133 | } | |
134 | ||
135 | static int max8998_get_enable_register(struct regulator_dev *rdev, | |
136 | int *reg, int *shift) | |
137 | { | |
7b94791b | 138 | int ldo = rdev_get_id(rdev); |
156f2528 KP |
139 | |
140 | switch (ldo) { | |
141 | case MAX8998_LDO2 ... MAX8998_LDO5: | |
142 | *reg = MAX8998_REG_ONOFF1; | |
143 | *shift = 3 - (ldo - MAX8998_LDO2); | |
144 | break; | |
145 | case MAX8998_LDO6 ... MAX8998_LDO13: | |
146 | *reg = MAX8998_REG_ONOFF2; | |
147 | *shift = 7 - (ldo - MAX8998_LDO6); | |
148 | break; | |
149 | case MAX8998_LDO14 ... MAX8998_LDO17: | |
150 | *reg = MAX8998_REG_ONOFF3; | |
151 | *shift = 7 - (ldo - MAX8998_LDO14); | |
152 | break; | |
153 | case MAX8998_BUCK1 ... MAX8998_BUCK4: | |
154 | *reg = MAX8998_REG_ONOFF1; | |
155 | *shift = 7 - (ldo - MAX8998_BUCK1); | |
156 | break; | |
157 | case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG: | |
158 | *reg = MAX8998_REG_ONOFF4; | |
159 | *shift = 7 - (ldo - MAX8998_EN32KHZ_AP); | |
160 | break; | |
161 | case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2: | |
162 | *reg = MAX8998_REG_CHGR2; | |
163 | *shift = 7 - (ldo - MAX8998_ESAFEOUT1); | |
164 | break; | |
165 | default: | |
166 | return -EINVAL; | |
167 | } | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static int max8998_ldo_is_enabled(struct regulator_dev *rdev) | |
173 | { | |
174 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 175 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
176 | int ret, reg, shift = 8; |
177 | u8 val; | |
178 | ||
179 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
180 | if (ret) | |
181 | return ret; | |
182 | ||
676e02d7 | 183 | ret = max8998_read_reg(i2c, reg, &val); |
156f2528 KP |
184 | if (ret) |
185 | return ret; | |
186 | ||
187 | return val & (1 << shift); | |
188 | } | |
189 | ||
190 | static int max8998_ldo_enable(struct regulator_dev *rdev) | |
191 | { | |
192 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 193 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
194 | int reg, shift = 8, ret; |
195 | ||
196 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
197 | if (ret) | |
198 | return ret; | |
199 | ||
676e02d7 | 200 | return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift); |
156f2528 KP |
201 | } |
202 | ||
203 | static int max8998_ldo_disable(struct regulator_dev *rdev) | |
204 | { | |
205 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 206 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
207 | int reg, shift = 8, ret; |
208 | ||
209 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
210 | if (ret) | |
211 | return ret; | |
212 | ||
676e02d7 | 213 | return max8998_update_reg(i2c, reg, 0, 1<<shift); |
156f2528 KP |
214 | } |
215 | ||
216 | static int max8998_get_voltage_register(struct regulator_dev *rdev, | |
217 | int *_reg, int *_shift, int *_mask) | |
218 | { | |
7b94791b | 219 | int ldo = rdev_get_id(rdev); |
889cd5a6 | 220 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
156f2528 KP |
221 | int reg, shift = 0, mask = 0xff; |
222 | ||
223 | switch (ldo) { | |
224 | case MAX8998_LDO2 ... MAX8998_LDO3: | |
225 | reg = MAX8998_REG_LDO2_LDO3; | |
226 | mask = 0xf; | |
227 | if (ldo == MAX8998_LDO2) | |
228 | shift = 4; | |
229 | else | |
230 | shift = 0; | |
231 | break; | |
232 | case MAX8998_LDO4 ... MAX8998_LDO7: | |
233 | reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4); | |
234 | break; | |
235 | case MAX8998_LDO8 ... MAX8998_LDO9: | |
236 | reg = MAX8998_REG_LDO8_LDO9; | |
237 | mask = 0xf; | |
238 | if (ldo == MAX8998_LDO8) | |
239 | shift = 4; | |
240 | else | |
241 | shift = 0; | |
242 | break; | |
243 | case MAX8998_LDO10 ... MAX8998_LDO11: | |
244 | reg = MAX8998_REG_LDO10_LDO11; | |
245 | if (ldo == MAX8998_LDO10) { | |
246 | shift = 5; | |
247 | mask = 0x7; | |
248 | } else { | |
249 | shift = 0; | |
250 | mask = 0x1f; | |
251 | } | |
252 | break; | |
253 | case MAX8998_LDO12 ... MAX8998_LDO17: | |
254 | reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12); | |
255 | break; | |
256 | case MAX8998_BUCK1: | |
889cd5a6 | 257 | reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx; |
156f2528 KP |
258 | break; |
259 | case MAX8998_BUCK2: | |
889cd5a6 | 260 | reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx; |
156f2528 KP |
261 | break; |
262 | case MAX8998_BUCK3: | |
263 | reg = MAX8998_REG_BUCK3; | |
264 | break; | |
265 | case MAX8998_BUCK4: | |
266 | reg = MAX8998_REG_BUCK4; | |
267 | break; | |
268 | default: | |
269 | return -EINVAL; | |
270 | } | |
271 | ||
272 | *_reg = reg; | |
273 | *_shift = shift; | |
274 | *_mask = mask; | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
7b4354b4 | 279 | static int max8998_get_voltage_sel(struct regulator_dev *rdev) |
156f2528 KP |
280 | { |
281 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 282 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
283 | int reg, shift = 0, mask, ret; |
284 | u8 val; | |
285 | ||
286 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); | |
287 | if (ret) | |
288 | return ret; | |
289 | ||
676e02d7 | 290 | ret = max8998_read_reg(i2c, reg, &val); |
156f2528 KP |
291 | if (ret) |
292 | return ret; | |
293 | ||
294 | val >>= shift; | |
295 | val &= mask; | |
296 | ||
7b4354b4 | 297 | return val; |
156f2528 KP |
298 | } |
299 | ||
9d92492f | 300 | static int max8998_set_voltage_ldo(struct regulator_dev *rdev, |
3a93f2a9 | 301 | int min_uV, int max_uV, unsigned *selector) |
9d92492f LM |
302 | { |
303 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
304 | struct i2c_client *i2c = max8998->iodev->i2c; | |
305 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
306 | const struct voltage_map_desc *desc; | |
7b94791b | 307 | int ldo = rdev_get_id(rdev); |
2e42a7dc | 308 | int reg, shift = 0, mask, ret, i; |
9d92492f LM |
309 | |
310 | if (ldo >= ARRAY_SIZE(ldo_voltage_map)) | |
311 | return -EINVAL; | |
312 | ||
313 | desc = ldo_voltage_map[ldo]; | |
314 | if (desc == NULL) | |
315 | return -EINVAL; | |
316 | ||
317 | if (max_vol < desc->min || min_vol > desc->max) | |
318 | return -EINVAL; | |
319 | ||
2e42a7dc AL |
320 | if (min_vol < desc->min) |
321 | min_vol = desc->min; | |
322 | ||
323 | i = DIV_ROUND_UP(min_vol - desc->min, desc->step); | |
9d92492f LM |
324 | |
325 | if (desc->min + desc->step*i > max_vol) | |
326 | return -EINVAL; | |
327 | ||
3a93f2a9 MB |
328 | *selector = i; |
329 | ||
9d92492f LM |
330 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
331 | if (ret) | |
332 | return ret; | |
333 | ||
334 | ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift); | |
335 | ||
336 | return ret; | |
337 | } | |
338 | ||
50f19a45 LM |
339 | static inline void buck1_gpio_set(int gpio1, int gpio2, int v) |
340 | { | |
341 | gpio_set_value(gpio1, v & 0x1); | |
342 | gpio_set_value(gpio2, (v >> 1) & 0x1); | |
343 | } | |
344 | ||
345 | static inline void buck2_gpio_set(int gpio, int v) | |
346 | { | |
347 | gpio_set_value(gpio, v & 0x1); | |
348 | } | |
349 | ||
9d92492f | 350 | static int max8998_set_voltage_buck(struct regulator_dev *rdev, |
f4d6adf1 | 351 | int min_uV, int max_uV, unsigned *selector) |
156f2528 KP |
352 | { |
353 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
50f19a45 LM |
354 | struct max8998_platform_data *pdata = |
355 | dev_get_platdata(max8998->iodev->dev); | |
676e02d7 | 356 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
357 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; |
358 | const struct voltage_map_desc *desc; | |
7b94791b | 359 | int buck = rdev_get_id(rdev); |
156f2528 | 360 | int reg, shift = 0, mask, ret; |
276909d3 | 361 | int i, j, previous_sel; |
50f19a45 | 362 | static u8 buck1_last_val; |
156f2528 | 363 | |
50f19a45 | 364 | if (buck >= ARRAY_SIZE(ldo_voltage_map)) |
156f2528 KP |
365 | return -EINVAL; |
366 | ||
50f19a45 LM |
367 | desc = ldo_voltage_map[buck]; |
368 | ||
156f2528 KP |
369 | if (desc == NULL) |
370 | return -EINVAL; | |
371 | ||
372 | if (max_vol < desc->min || min_vol > desc->max) | |
373 | return -EINVAL; | |
374 | ||
2e42a7dc AL |
375 | if (min_vol < desc->min) |
376 | min_vol = desc->min; | |
377 | ||
378 | i = DIV_ROUND_UP(min_vol - desc->min, desc->step); | |
156f2528 | 379 | |
c5a4655d MH |
380 | if (desc->min + desc->step*i > max_vol) |
381 | return -EINVAL; | |
382 | ||
3a93f2a9 MB |
383 | *selector = i; |
384 | ||
156f2528 KP |
385 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
386 | if (ret) | |
387 | return ret; | |
388 | ||
7b4354b4 | 389 | previous_sel = max8998_get_voltage_sel(rdev); |
50f19a45 LM |
390 | |
391 | /* Check if voltage needs to be changed */ | |
392 | /* if previous_voltage equal new voltage, return */ | |
7b4354b4 | 393 | if (previous_sel == i) { |
50f19a45 | 394 | dev_dbg(max8998->dev, "No voltage change, old:%d, new:%d\n", |
7b4354b4 AL |
395 | max8998_list_voltage(rdev, previous_sel), |
396 | max8998_list_voltage(rdev, i)); | |
50f19a45 | 397 | return ret; |
c5a4655d MH |
398 | } |
399 | ||
50f19a45 LM |
400 | switch (buck) { |
401 | case MAX8998_BUCK1: | |
402 | dev_dbg(max8998->dev, | |
85ee7a1d JP |
403 | "BUCK1, i:%d, buck1_vol1:%d, buck1_vol2:%d\n" |
404 | "buck1_vol3:%d, buck1_vol4:%d\n", | |
50f19a45 LM |
405 | i, max8998->buck1_vol[0], max8998->buck1_vol[1], |
406 | max8998->buck1_vol[2], max8998->buck1_vol[3]); | |
407 | ||
408 | if (gpio_is_valid(pdata->buck1_set1) && | |
409 | gpio_is_valid(pdata->buck1_set2)) { | |
410 | ||
411 | /* check if requested voltage */ | |
412 | /* value is already defined */ | |
413 | for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) { | |
414 | if (max8998->buck1_vol[j] == i) { | |
415 | max8998->buck1_idx = j; | |
416 | buck1_gpio_set(pdata->buck1_set1, | |
417 | pdata->buck1_set2, j); | |
418 | goto buck1_exit; | |
419 | } | |
420 | } | |
421 | ||
735a3d9e MH |
422 | if (pdata->buck_voltage_lock) |
423 | return -EINVAL; | |
424 | ||
50f19a45 LM |
425 | /* no predefine regulator found */ |
426 | max8998->buck1_idx = (buck1_last_val % 2) + 2; | |
427 | dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n", | |
428 | max8998->buck1_idx); | |
429 | max8998->buck1_vol[max8998->buck1_idx] = i; | |
430 | ret = max8998_get_voltage_register(rdev, ®, | |
431 | &shift, | |
432 | &mask); | |
433 | ret = max8998_write_reg(i2c, reg, i); | |
434 | buck1_gpio_set(pdata->buck1_set1, | |
435 | pdata->buck1_set2, max8998->buck1_idx); | |
436 | buck1_last_val++; | |
437 | buck1_exit: | |
438 | dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n", | |
439 | i2c->name, gpio_get_value(pdata->buck1_set1), | |
440 | gpio_get_value(pdata->buck1_set2)); | |
441 | break; | |
442 | } else { | |
443 | ret = max8998_write_reg(i2c, reg, i); | |
444 | } | |
445 | break; | |
c5a4655d | 446 | |
50f19a45 LM |
447 | case MAX8998_BUCK2: |
448 | dev_dbg(max8998->dev, | |
449 | "BUCK2, i:%d buck2_vol1:%d, buck2_vol2:%d\n" | |
450 | , i, max8998->buck2_vol[0], max8998->buck2_vol[1]); | |
451 | if (gpio_is_valid(pdata->buck2_set3)) { | |
735a3d9e MH |
452 | |
453 | /* check if requested voltage */ | |
454 | /* value is already defined */ | |
455 | for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) { | |
456 | if (max8998->buck2_vol[j] == i) { | |
457 | max8998->buck2_idx = j; | |
458 | buck2_gpio_set(pdata->buck2_set3, j); | |
459 | goto buck2_exit; | |
460 | } | |
50f19a45 | 461 | } |
735a3d9e MH |
462 | |
463 | if (pdata->buck_voltage_lock) | |
464 | return -EINVAL; | |
465 | ||
466 | max8998_get_voltage_register(rdev, | |
467 | ®, &shift, &mask); | |
468 | ret = max8998_write_reg(i2c, reg, i); | |
469 | max8998->buck2_vol[max8998->buck2_idx] = i; | |
470 | buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx); | |
471 | buck2_exit: | |
50f19a45 LM |
472 | dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name, |
473 | gpio_get_value(pdata->buck2_set3)); | |
474 | } else { | |
475 | ret = max8998_write_reg(i2c, reg, i); | |
476 | } | |
477 | break; | |
478 | ||
479 | case MAX8998_BUCK3: | |
480 | case MAX8998_BUCK4: | |
481 | ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift); | |
482 | break; | |
c5a4655d MH |
483 | } |
484 | ||
276909d3 AL |
485 | return ret; |
486 | } | |
487 | ||
488 | static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev, | |
489 | unsigned int old_selector, | |
490 | unsigned int new_selector) | |
491 | { | |
492 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
493 | struct i2c_client *i2c = max8998->iodev->i2c; | |
494 | const struct voltage_map_desc *desc; | |
495 | int buck = rdev_get_id(rdev); | |
496 | u8 val = 0; | |
497 | int difference, ret; | |
498 | ||
499 | if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4) | |
500 | return -EINVAL; | |
501 | ||
502 | desc = ldo_voltage_map[buck]; | |
503 | ||
50f19a45 | 504 | /* Voltage stabilization */ |
276909d3 AL |
505 | ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val); |
506 | if (ret) | |
507 | return ret; | |
50f19a45 LM |
508 | |
509 | /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */ | |
510 | /* MAX8998 has ENRAMP bit implemented, so test it*/ | |
511 | if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP)) | |
276909d3 | 512 | return 0; |
50f19a45 | 513 | |
276909d3 | 514 | difference = (new_selector - old_selector) * desc->step; |
50f19a45 | 515 | if (difference > 0) |
276909d3 | 516 | return difference / ((val & 0x0f) + 1); |
50f19a45 | 517 | |
276909d3 | 518 | return 0; |
156f2528 KP |
519 | } |
520 | ||
521 | static struct regulator_ops max8998_ldo_ops = { | |
522 | .list_voltage = max8998_list_voltage, | |
523 | .is_enabled = max8998_ldo_is_enabled, | |
524 | .enable = max8998_ldo_enable, | |
525 | .disable = max8998_ldo_disable, | |
7b4354b4 | 526 | .get_voltage_sel = max8998_get_voltage_sel, |
9d92492f | 527 | .set_voltage = max8998_set_voltage_ldo, |
156f2528 KP |
528 | .set_suspend_enable = max8998_ldo_enable, |
529 | .set_suspend_disable = max8998_ldo_disable, | |
530 | }; | |
531 | ||
532 | static struct regulator_ops max8998_buck_ops = { | |
533 | .list_voltage = max8998_list_voltage, | |
534 | .is_enabled = max8998_ldo_is_enabled, | |
535 | .enable = max8998_ldo_enable, | |
536 | .disable = max8998_ldo_disable, | |
7b4354b4 | 537 | .get_voltage_sel = max8998_get_voltage_sel, |
9d92492f | 538 | .set_voltage = max8998_set_voltage_buck, |
276909d3 | 539 | .set_voltage_time_sel = max8998_set_voltage_buck_time_sel, |
156f2528 KP |
540 | .set_suspend_enable = max8998_ldo_enable, |
541 | .set_suspend_disable = max8998_ldo_disable, | |
542 | }; | |
543 | ||
544 | static struct regulator_ops max8998_others_ops = { | |
545 | .is_enabled = max8998_ldo_is_enabled, | |
546 | .enable = max8998_ldo_enable, | |
547 | .disable = max8998_ldo_disable, | |
548 | .set_suspend_enable = max8998_ldo_enable, | |
549 | .set_suspend_disable = max8998_ldo_disable, | |
550 | }; | |
551 | ||
552 | static struct regulator_desc regulators[] = { | |
553 | { | |
554 | .name = "LDO2", | |
555 | .id = MAX8998_LDO2, | |
556 | .ops = &max8998_ldo_ops, | |
557 | .type = REGULATOR_VOLTAGE, | |
558 | .owner = THIS_MODULE, | |
559 | }, { | |
560 | .name = "LDO3", | |
561 | .id = MAX8998_LDO3, | |
562 | .ops = &max8998_ldo_ops, | |
563 | .type = REGULATOR_VOLTAGE, | |
564 | .owner = THIS_MODULE, | |
565 | }, { | |
566 | .name = "LDO4", | |
567 | .id = MAX8998_LDO4, | |
568 | .ops = &max8998_ldo_ops, | |
569 | .type = REGULATOR_VOLTAGE, | |
570 | .owner = THIS_MODULE, | |
571 | }, { | |
572 | .name = "LDO5", | |
573 | .id = MAX8998_LDO5, | |
574 | .ops = &max8998_ldo_ops, | |
575 | .type = REGULATOR_VOLTAGE, | |
576 | .owner = THIS_MODULE, | |
577 | }, { | |
578 | .name = "LDO6", | |
579 | .id = MAX8998_LDO6, | |
580 | .ops = &max8998_ldo_ops, | |
581 | .type = REGULATOR_VOLTAGE, | |
582 | .owner = THIS_MODULE, | |
583 | }, { | |
584 | .name = "LDO7", | |
585 | .id = MAX8998_LDO7, | |
586 | .ops = &max8998_ldo_ops, | |
587 | .type = REGULATOR_VOLTAGE, | |
588 | .owner = THIS_MODULE, | |
589 | }, { | |
590 | .name = "LDO8", | |
591 | .id = MAX8998_LDO8, | |
592 | .ops = &max8998_ldo_ops, | |
593 | .type = REGULATOR_VOLTAGE, | |
594 | .owner = THIS_MODULE, | |
595 | }, { | |
596 | .name = "LDO9", | |
597 | .id = MAX8998_LDO9, | |
598 | .ops = &max8998_ldo_ops, | |
599 | .type = REGULATOR_VOLTAGE, | |
600 | .owner = THIS_MODULE, | |
601 | }, { | |
602 | .name = "LDO10", | |
603 | .id = MAX8998_LDO10, | |
604 | .ops = &max8998_ldo_ops, | |
605 | .type = REGULATOR_VOLTAGE, | |
606 | .owner = THIS_MODULE, | |
607 | }, { | |
608 | .name = "LDO11", | |
609 | .id = MAX8998_LDO11, | |
610 | .ops = &max8998_ldo_ops, | |
611 | .type = REGULATOR_VOLTAGE, | |
612 | .owner = THIS_MODULE, | |
613 | }, { | |
614 | .name = "LDO12", | |
615 | .id = MAX8998_LDO12, | |
616 | .ops = &max8998_ldo_ops, | |
617 | .type = REGULATOR_VOLTAGE, | |
618 | .owner = THIS_MODULE, | |
619 | }, { | |
620 | .name = "LDO13", | |
621 | .id = MAX8998_LDO13, | |
622 | .ops = &max8998_ldo_ops, | |
623 | .type = REGULATOR_VOLTAGE, | |
624 | .owner = THIS_MODULE, | |
625 | }, { | |
626 | .name = "LDO14", | |
627 | .id = MAX8998_LDO14, | |
628 | .ops = &max8998_ldo_ops, | |
629 | .type = REGULATOR_VOLTAGE, | |
630 | .owner = THIS_MODULE, | |
631 | }, { | |
632 | .name = "LDO15", | |
633 | .id = MAX8998_LDO15, | |
634 | .ops = &max8998_ldo_ops, | |
635 | .type = REGULATOR_VOLTAGE, | |
636 | .owner = THIS_MODULE, | |
637 | }, { | |
638 | .name = "LDO16", | |
639 | .id = MAX8998_LDO16, | |
640 | .ops = &max8998_ldo_ops, | |
641 | .type = REGULATOR_VOLTAGE, | |
642 | .owner = THIS_MODULE, | |
643 | }, { | |
644 | .name = "LDO17", | |
645 | .id = MAX8998_LDO17, | |
646 | .ops = &max8998_ldo_ops, | |
647 | .type = REGULATOR_VOLTAGE, | |
648 | .owner = THIS_MODULE, | |
649 | }, { | |
650 | .name = "BUCK1", | |
651 | .id = MAX8998_BUCK1, | |
652 | .ops = &max8998_buck_ops, | |
653 | .type = REGULATOR_VOLTAGE, | |
654 | .owner = THIS_MODULE, | |
655 | }, { | |
656 | .name = "BUCK2", | |
657 | .id = MAX8998_BUCK2, | |
658 | .ops = &max8998_buck_ops, | |
659 | .type = REGULATOR_VOLTAGE, | |
660 | .owner = THIS_MODULE, | |
661 | }, { | |
662 | .name = "BUCK3", | |
663 | .id = MAX8998_BUCK3, | |
664 | .ops = &max8998_buck_ops, | |
665 | .type = REGULATOR_VOLTAGE, | |
666 | .owner = THIS_MODULE, | |
667 | }, { | |
668 | .name = "BUCK4", | |
669 | .id = MAX8998_BUCK4, | |
670 | .ops = &max8998_buck_ops, | |
671 | .type = REGULATOR_VOLTAGE, | |
672 | .owner = THIS_MODULE, | |
673 | }, { | |
674 | .name = "EN32KHz AP", | |
675 | .id = MAX8998_EN32KHZ_AP, | |
676 | .ops = &max8998_others_ops, | |
677 | .type = REGULATOR_VOLTAGE, | |
678 | .owner = THIS_MODULE, | |
679 | }, { | |
680 | .name = "EN32KHz CP", | |
681 | .id = MAX8998_EN32KHZ_CP, | |
682 | .ops = &max8998_others_ops, | |
683 | .type = REGULATOR_VOLTAGE, | |
684 | .owner = THIS_MODULE, | |
685 | }, { | |
686 | .name = "ENVICHG", | |
687 | .id = MAX8998_ENVICHG, | |
688 | .ops = &max8998_others_ops, | |
689 | .type = REGULATOR_VOLTAGE, | |
690 | .owner = THIS_MODULE, | |
691 | }, { | |
692 | .name = "ESAFEOUT1", | |
693 | .id = MAX8998_ESAFEOUT1, | |
694 | .ops = &max8998_others_ops, | |
695 | .type = REGULATOR_VOLTAGE, | |
696 | .owner = THIS_MODULE, | |
697 | }, { | |
698 | .name = "ESAFEOUT2", | |
699 | .id = MAX8998_ESAFEOUT2, | |
700 | .ops = &max8998_others_ops, | |
701 | .type = REGULATOR_VOLTAGE, | |
702 | .owner = THIS_MODULE, | |
703 | } | |
704 | }; | |
705 | ||
706 | static __devinit int max8998_pmic_probe(struct platform_device *pdev) | |
707 | { | |
708 | struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
709 | struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev); | |
c172708d | 710 | struct regulator_config config = { }; |
156f2528 KP |
711 | struct regulator_dev **rdev; |
712 | struct max8998_data *max8998; | |
50f19a45 | 713 | struct i2c_client *i2c; |
156f2528 KP |
714 | int i, ret, size; |
715 | ||
716 | if (!pdata) { | |
717 | dev_err(pdev->dev.parent, "No platform init data supplied\n"); | |
718 | return -ENODEV; | |
719 | } | |
720 | ||
0f80ea14 AL |
721 | max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data), |
722 | GFP_KERNEL); | |
156f2528 KP |
723 | if (!max8998) |
724 | return -ENOMEM; | |
725 | ||
11fa0d1d | 726 | size = sizeof(struct regulator_dev *) * pdata->num_regulators; |
0f80ea14 AL |
727 | max8998->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); |
728 | if (!max8998->rdev) | |
156f2528 | 729 | return -ENOMEM; |
156f2528 KP |
730 | |
731 | rdev = max8998->rdev; | |
747cc851 | 732 | max8998->dev = &pdev->dev; |
156f2528 | 733 | max8998->iodev = iodev; |
c356cbc2 | 734 | max8998->num_regulators = pdata->num_regulators; |
156f2528 | 735 | platform_set_drvdata(pdev, max8998); |
50f19a45 LM |
736 | i2c = max8998->iodev->i2c; |
737 | ||
735a3d9e MH |
738 | max8998->buck1_idx = pdata->buck1_default_idx; |
739 | max8998->buck2_idx = pdata->buck2_default_idx; | |
740 | ||
50f19a45 LM |
741 | /* NOTE: */ |
742 | /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */ | |
743 | /* will be displayed */ | |
744 | ||
745 | /* Check if MAX8998 voltage selection GPIOs are defined */ | |
746 | if (gpio_is_valid(pdata->buck1_set1) && | |
747 | gpio_is_valid(pdata->buck1_set2)) { | |
748 | /* Check if SET1 is not equal to 0 */ | |
749 | if (!pdata->buck1_set1) { | |
750 | printk(KERN_ERR "MAX8998 SET1 GPIO defined as 0 !\n"); | |
751 | WARN_ON(!pdata->buck1_set1); | |
6be6e96f | 752 | ret = -EIO; |
0f80ea14 | 753 | goto err_out; |
50f19a45 LM |
754 | } |
755 | /* Check if SET2 is not equal to 0 */ | |
756 | if (!pdata->buck1_set2) { | |
757 | printk(KERN_ERR "MAX8998 SET2 GPIO defined as 0 !\n"); | |
758 | WARN_ON(!pdata->buck1_set2); | |
6be6e96f | 759 | ret = -EIO; |
0f80ea14 | 760 | goto err_out; |
50f19a45 LM |
761 | } |
762 | ||
763 | gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1"); | |
764 | gpio_direction_output(pdata->buck1_set1, | |
765 | max8998->buck1_idx & 0x1); | |
766 | ||
767 | ||
768 | gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2"); | |
769 | gpio_direction_output(pdata->buck1_set2, | |
770 | (max8998->buck1_idx >> 1) & 0x1); | |
771 | /* Set predefined value for BUCK1 register 1 */ | |
772 | i = 0; | |
773 | while (buck12_voltage_map_desc.min + | |
774 | buck12_voltage_map_desc.step*i | |
735a3d9e | 775 | < (pdata->buck1_voltage1 / 1000)) |
50f19a45 | 776 | i++; |
50f19a45 LM |
777 | max8998->buck1_vol[0] = i; |
778 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1, i); | |
735a3d9e | 779 | if (ret) |
0f80ea14 | 780 | goto err_out; |
50f19a45 LM |
781 | |
782 | /* Set predefined value for BUCK1 register 2 */ | |
783 | i = 0; | |
784 | while (buck12_voltage_map_desc.min + | |
785 | buck12_voltage_map_desc.step*i | |
735a3d9e | 786 | < (pdata->buck1_voltage2 / 1000)) |
50f19a45 LM |
787 | i++; |
788 | ||
789 | max8998->buck1_vol[1] = i; | |
735a3d9e MH |
790 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE2, i); |
791 | if (ret) | |
0f80ea14 | 792 | goto err_out; |
735a3d9e MH |
793 | |
794 | /* Set predefined value for BUCK1 register 3 */ | |
795 | i = 0; | |
796 | while (buck12_voltage_map_desc.min + | |
797 | buck12_voltage_map_desc.step*i | |
798 | < (pdata->buck1_voltage3 / 1000)) | |
799 | i++; | |
800 | ||
801 | max8998->buck1_vol[2] = i; | |
802 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE3, i); | |
803 | if (ret) | |
0f80ea14 | 804 | goto err_out; |
735a3d9e MH |
805 | |
806 | /* Set predefined value for BUCK1 register 4 */ | |
807 | i = 0; | |
808 | while (buck12_voltage_map_desc.min + | |
809 | buck12_voltage_map_desc.step*i | |
810 | < (pdata->buck1_voltage4 / 1000)) | |
811 | i++; | |
812 | ||
813 | max8998->buck1_vol[3] = i; | |
814 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE4, i); | |
50f19a45 | 815 | if (ret) |
0f80ea14 | 816 | goto err_out; |
50f19a45 LM |
817 | |
818 | } | |
819 | ||
820 | if (gpio_is_valid(pdata->buck2_set3)) { | |
821 | /* Check if SET3 is not equal to 0 */ | |
822 | if (!pdata->buck2_set3) { | |
823 | printk(KERN_ERR "MAX8998 SET3 GPIO defined as 0 !\n"); | |
824 | WARN_ON(!pdata->buck2_set3); | |
6be6e96f | 825 | ret = -EIO; |
0f80ea14 | 826 | goto err_out; |
50f19a45 LM |
827 | } |
828 | gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3"); | |
829 | gpio_direction_output(pdata->buck2_set3, | |
830 | max8998->buck2_idx & 0x1); | |
831 | ||
735a3d9e | 832 | /* BUCK2 register 1 */ |
50f19a45 LM |
833 | i = 0; |
834 | while (buck12_voltage_map_desc.min + | |
835 | buck12_voltage_map_desc.step*i | |
735a3d9e | 836 | < (pdata->buck2_voltage1 / 1000)) |
50f19a45 | 837 | i++; |
50f19a45 LM |
838 | max8998->buck2_vol[0] = i; |
839 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1, i); | |
840 | if (ret) | |
0f80ea14 | 841 | goto err_out; |
50f19a45 | 842 | |
735a3d9e MH |
843 | /* BUCK2 register 2 */ |
844 | i = 0; | |
845 | while (buck12_voltage_map_desc.min + | |
846 | buck12_voltage_map_desc.step*i | |
847 | < (pdata->buck2_voltage2 / 1000)) | |
848 | i++; | |
735a3d9e MH |
849 | max8998->buck2_vol[1] = i; |
850 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE2, i); | |
851 | if (ret) | |
0f80ea14 | 852 | goto err_out; |
50f19a45 | 853 | } |
156f2528 KP |
854 | |
855 | for (i = 0; i < pdata->num_regulators; i++) { | |
856 | const struct voltage_map_desc *desc; | |
857 | int id = pdata->regulators[i].id; | |
858 | int index = id - MAX8998_LDO2; | |
859 | ||
860 | desc = ldo_voltage_map[id]; | |
861 | if (desc && regulators[index].ops != &max8998_others_ops) { | |
862 | int count = (desc->max - desc->min) / desc->step + 1; | |
863 | regulators[index].n_voltages = count; | |
864 | } | |
c172708d MB |
865 | |
866 | config.dev = max8998->dev; | |
867 | config.init_data = pdata->regulators[i].initdata; | |
868 | config.driver_data = max8998; | |
869 | ||
870 | rdev[i] = regulator_register(®ulators[index], &config); | |
156f2528 KP |
871 | if (IS_ERR(rdev[i])) { |
872 | ret = PTR_ERR(rdev[i]); | |
873 | dev_err(max8998->dev, "regulator init failed\n"); | |
874 | rdev[i] = NULL; | |
875 | goto err; | |
876 | } | |
877 | } | |
878 | ||
879 | ||
880 | return 0; | |
881 | err: | |
0f80ea14 AL |
882 | while (--i >= 0) |
883 | regulator_unregister(rdev[i]); | |
884 | err_out: | |
156f2528 KP |
885 | return ret; |
886 | } | |
887 | ||
888 | static int __devexit max8998_pmic_remove(struct platform_device *pdev) | |
889 | { | |
890 | struct max8998_data *max8998 = platform_get_drvdata(pdev); | |
891 | struct regulator_dev **rdev = max8998->rdev; | |
892 | int i; | |
893 | ||
11fa0d1d | 894 | for (i = 0; i < max8998->num_regulators; i++) |
0f80ea14 | 895 | regulator_unregister(rdev[i]); |
156f2528 KP |
896 | return 0; |
897 | } | |
898 | ||
337ce5d1 MH |
899 | static const struct platform_device_id max8998_pmic_id[] = { |
900 | { "max8998-pmic", TYPE_MAX8998 }, | |
901 | { "lp3974-pmic", TYPE_LP3974 }, | |
902 | { } | |
903 | }; | |
a51b907b | 904 | MODULE_DEVICE_TABLE(platform, max8998_pmic_id); |
337ce5d1 | 905 | |
156f2528 KP |
906 | static struct platform_driver max8998_pmic_driver = { |
907 | .driver = { | |
908 | .name = "max8998-pmic", | |
909 | .owner = THIS_MODULE, | |
910 | }, | |
911 | .probe = max8998_pmic_probe, | |
912 | .remove = __devexit_p(max8998_pmic_remove), | |
337ce5d1 | 913 | .id_table = max8998_pmic_id, |
156f2528 KP |
914 | }; |
915 | ||
916 | static int __init max8998_pmic_init(void) | |
917 | { | |
918 | return platform_driver_register(&max8998_pmic_driver); | |
919 | } | |
920 | subsys_initcall(max8998_pmic_init); | |
921 | ||
922 | static void __exit max8998_pmic_cleanup(void) | |
923 | { | |
924 | platform_driver_unregister(&max8998_pmic_driver); | |
925 | } | |
926 | module_exit(max8998_pmic_cleanup); | |
927 | ||
928 | MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver"); | |
929 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | |
930 | MODULE_LICENSE("GPL"); |