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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_get_enable_register(struct regulator_dev *rdev, |
115 | int *reg, int *shift) | |
116 | { | |
7b94791b | 117 | int ldo = rdev_get_id(rdev); |
156f2528 KP |
118 | |
119 | switch (ldo) { | |
120 | case MAX8998_LDO2 ... MAX8998_LDO5: | |
121 | *reg = MAX8998_REG_ONOFF1; | |
122 | *shift = 3 - (ldo - MAX8998_LDO2); | |
123 | break; | |
124 | case MAX8998_LDO6 ... MAX8998_LDO13: | |
125 | *reg = MAX8998_REG_ONOFF2; | |
126 | *shift = 7 - (ldo - MAX8998_LDO6); | |
127 | break; | |
128 | case MAX8998_LDO14 ... MAX8998_LDO17: | |
129 | *reg = MAX8998_REG_ONOFF3; | |
130 | *shift = 7 - (ldo - MAX8998_LDO14); | |
131 | break; | |
132 | case MAX8998_BUCK1 ... MAX8998_BUCK4: | |
133 | *reg = MAX8998_REG_ONOFF1; | |
134 | *shift = 7 - (ldo - MAX8998_BUCK1); | |
135 | break; | |
136 | case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG: | |
137 | *reg = MAX8998_REG_ONOFF4; | |
138 | *shift = 7 - (ldo - MAX8998_EN32KHZ_AP); | |
139 | break; | |
140 | case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2: | |
141 | *reg = MAX8998_REG_CHGR2; | |
142 | *shift = 7 - (ldo - MAX8998_ESAFEOUT1); | |
143 | break; | |
144 | default: | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static int max8998_ldo_is_enabled(struct regulator_dev *rdev) | |
152 | { | |
153 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 154 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
155 | int ret, reg, shift = 8; |
156 | u8 val; | |
157 | ||
158 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
159 | if (ret) | |
160 | return ret; | |
161 | ||
676e02d7 | 162 | ret = max8998_read_reg(i2c, reg, &val); |
156f2528 KP |
163 | if (ret) |
164 | return ret; | |
165 | ||
166 | return val & (1 << shift); | |
167 | } | |
168 | ||
169 | static int max8998_ldo_enable(struct regulator_dev *rdev) | |
170 | { | |
171 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 172 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
173 | int reg, shift = 8, ret; |
174 | ||
175 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
176 | if (ret) | |
177 | return ret; | |
178 | ||
676e02d7 | 179 | return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift); |
156f2528 KP |
180 | } |
181 | ||
182 | static int max8998_ldo_disable(struct regulator_dev *rdev) | |
183 | { | |
184 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 185 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
186 | int reg, shift = 8, ret; |
187 | ||
188 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
189 | if (ret) | |
190 | return ret; | |
191 | ||
676e02d7 | 192 | return max8998_update_reg(i2c, reg, 0, 1<<shift); |
156f2528 KP |
193 | } |
194 | ||
195 | static int max8998_get_voltage_register(struct regulator_dev *rdev, | |
196 | int *_reg, int *_shift, int *_mask) | |
197 | { | |
7b94791b | 198 | int ldo = rdev_get_id(rdev); |
889cd5a6 | 199 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
156f2528 KP |
200 | int reg, shift = 0, mask = 0xff; |
201 | ||
202 | switch (ldo) { | |
203 | case MAX8998_LDO2 ... MAX8998_LDO3: | |
204 | reg = MAX8998_REG_LDO2_LDO3; | |
205 | mask = 0xf; | |
206 | if (ldo == MAX8998_LDO2) | |
207 | shift = 4; | |
208 | else | |
209 | shift = 0; | |
210 | break; | |
211 | case MAX8998_LDO4 ... MAX8998_LDO7: | |
212 | reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4); | |
213 | break; | |
214 | case MAX8998_LDO8 ... MAX8998_LDO9: | |
215 | reg = MAX8998_REG_LDO8_LDO9; | |
216 | mask = 0xf; | |
217 | if (ldo == MAX8998_LDO8) | |
218 | shift = 4; | |
219 | else | |
220 | shift = 0; | |
221 | break; | |
222 | case MAX8998_LDO10 ... MAX8998_LDO11: | |
223 | reg = MAX8998_REG_LDO10_LDO11; | |
224 | if (ldo == MAX8998_LDO10) { | |
225 | shift = 5; | |
226 | mask = 0x7; | |
227 | } else { | |
228 | shift = 0; | |
229 | mask = 0x1f; | |
230 | } | |
231 | break; | |
232 | case MAX8998_LDO12 ... MAX8998_LDO17: | |
233 | reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12); | |
234 | break; | |
235 | case MAX8998_BUCK1: | |
889cd5a6 | 236 | reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx; |
156f2528 KP |
237 | break; |
238 | case MAX8998_BUCK2: | |
889cd5a6 | 239 | reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx; |
156f2528 KP |
240 | break; |
241 | case MAX8998_BUCK3: | |
242 | reg = MAX8998_REG_BUCK3; | |
243 | break; | |
244 | case MAX8998_BUCK4: | |
245 | reg = MAX8998_REG_BUCK4; | |
246 | break; | |
247 | default: | |
248 | return -EINVAL; | |
249 | } | |
250 | ||
251 | *_reg = reg; | |
252 | *_shift = shift; | |
253 | *_mask = mask; | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
7b4354b4 | 258 | static int max8998_get_voltage_sel(struct regulator_dev *rdev) |
156f2528 KP |
259 | { |
260 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 261 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
262 | int reg, shift = 0, mask, ret; |
263 | u8 val; | |
264 | ||
265 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); | |
266 | if (ret) | |
267 | return ret; | |
268 | ||
676e02d7 | 269 | ret = max8998_read_reg(i2c, reg, &val); |
156f2528 KP |
270 | if (ret) |
271 | return ret; | |
272 | ||
273 | val >>= shift; | |
274 | val &= mask; | |
275 | ||
7b4354b4 | 276 | return val; |
156f2528 KP |
277 | } |
278 | ||
baae019e AL |
279 | static int max8998_set_voltage_ldo_sel(struct regulator_dev *rdev, |
280 | unsigned selector) | |
9d92492f LM |
281 | { |
282 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
283 | struct i2c_client *i2c = max8998->iodev->i2c; | |
baae019e | 284 | int reg, shift = 0, mask, ret; |
3a93f2a9 | 285 | |
9d92492f LM |
286 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
287 | if (ret) | |
288 | return ret; | |
289 | ||
baae019e | 290 | ret = max8998_update_reg(i2c, reg, selector<<shift, mask<<shift); |
9d92492f LM |
291 | |
292 | return ret; | |
293 | } | |
294 | ||
50f19a45 LM |
295 | static inline void buck1_gpio_set(int gpio1, int gpio2, int v) |
296 | { | |
297 | gpio_set_value(gpio1, v & 0x1); | |
298 | gpio_set_value(gpio2, (v >> 1) & 0x1); | |
299 | } | |
300 | ||
301 | static inline void buck2_gpio_set(int gpio, int v) | |
302 | { | |
303 | gpio_set_value(gpio, v & 0x1); | |
304 | } | |
305 | ||
baae019e AL |
306 | static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev, |
307 | unsigned selector) | |
156f2528 KP |
308 | { |
309 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
50f19a45 LM |
310 | struct max8998_platform_data *pdata = |
311 | dev_get_platdata(max8998->iodev->dev); | |
676e02d7 | 312 | struct i2c_client *i2c = max8998->iodev->i2c; |
7b94791b | 313 | int buck = rdev_get_id(rdev); |
156f2528 | 314 | int reg, shift = 0, mask, ret; |
baae019e | 315 | int j, previous_sel; |
50f19a45 | 316 | static u8 buck1_last_val; |
156f2528 | 317 | |
156f2528 KP |
318 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
319 | if (ret) | |
320 | return ret; | |
321 | ||
7b4354b4 | 322 | previous_sel = max8998_get_voltage_sel(rdev); |
50f19a45 LM |
323 | |
324 | /* Check if voltage needs to be changed */ | |
325 | /* if previous_voltage equal new voltage, return */ | |
baae019e | 326 | if (previous_sel == selector) { |
50f19a45 | 327 | dev_dbg(max8998->dev, "No voltage change, old:%d, new:%d\n", |
9a0fbb62 | 328 | regulator_list_voltage_linear(rdev, previous_sel), |
baae019e | 329 | regulator_list_voltage_linear(rdev, selector)); |
50f19a45 | 330 | return ret; |
c5a4655d MH |
331 | } |
332 | ||
50f19a45 LM |
333 | switch (buck) { |
334 | case MAX8998_BUCK1: | |
335 | dev_dbg(max8998->dev, | |
baae019e | 336 | "BUCK1, selector:%d, buck1_vol1:%d, buck1_vol2:%d\n" |
85ee7a1d | 337 | "buck1_vol3:%d, buck1_vol4:%d\n", |
baae019e | 338 | selector, max8998->buck1_vol[0], max8998->buck1_vol[1], |
50f19a45 LM |
339 | max8998->buck1_vol[2], max8998->buck1_vol[3]); |
340 | ||
341 | if (gpio_is_valid(pdata->buck1_set1) && | |
342 | gpio_is_valid(pdata->buck1_set2)) { | |
343 | ||
344 | /* check if requested voltage */ | |
345 | /* value is already defined */ | |
346 | for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) { | |
baae019e | 347 | if (max8998->buck1_vol[j] == selector) { |
50f19a45 LM |
348 | max8998->buck1_idx = j; |
349 | buck1_gpio_set(pdata->buck1_set1, | |
350 | pdata->buck1_set2, j); | |
351 | goto buck1_exit; | |
352 | } | |
353 | } | |
354 | ||
735a3d9e MH |
355 | if (pdata->buck_voltage_lock) |
356 | return -EINVAL; | |
357 | ||
50f19a45 LM |
358 | /* no predefine regulator found */ |
359 | max8998->buck1_idx = (buck1_last_val % 2) + 2; | |
360 | dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n", | |
361 | max8998->buck1_idx); | |
baae019e | 362 | max8998->buck1_vol[max8998->buck1_idx] = selector; |
50f19a45 LM |
363 | ret = max8998_get_voltage_register(rdev, ®, |
364 | &shift, | |
365 | &mask); | |
baae019e | 366 | ret = max8998_write_reg(i2c, reg, selector); |
50f19a45 LM |
367 | buck1_gpio_set(pdata->buck1_set1, |
368 | pdata->buck1_set2, max8998->buck1_idx); | |
369 | buck1_last_val++; | |
370 | buck1_exit: | |
371 | dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n", | |
372 | i2c->name, gpio_get_value(pdata->buck1_set1), | |
373 | gpio_get_value(pdata->buck1_set2)); | |
374 | break; | |
375 | } else { | |
baae019e | 376 | ret = max8998_write_reg(i2c, reg, selector); |
50f19a45 LM |
377 | } |
378 | break; | |
c5a4655d | 379 | |
50f19a45 LM |
380 | case MAX8998_BUCK2: |
381 | dev_dbg(max8998->dev, | |
baae019e AL |
382 | "BUCK2, selector:%d buck2_vol1:%d, buck2_vol2:%d\n", |
383 | selector, max8998->buck2_vol[0], max8998->buck2_vol[1]); | |
50f19a45 | 384 | if (gpio_is_valid(pdata->buck2_set3)) { |
735a3d9e MH |
385 | |
386 | /* check if requested voltage */ | |
387 | /* value is already defined */ | |
388 | for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) { | |
baae019e | 389 | if (max8998->buck2_vol[j] == selector) { |
735a3d9e MH |
390 | max8998->buck2_idx = j; |
391 | buck2_gpio_set(pdata->buck2_set3, j); | |
392 | goto buck2_exit; | |
393 | } | |
50f19a45 | 394 | } |
735a3d9e MH |
395 | |
396 | if (pdata->buck_voltage_lock) | |
397 | return -EINVAL; | |
398 | ||
399 | max8998_get_voltage_register(rdev, | |
400 | ®, &shift, &mask); | |
baae019e AL |
401 | ret = max8998_write_reg(i2c, reg, selector); |
402 | max8998->buck2_vol[max8998->buck2_idx] = selector; | |
735a3d9e MH |
403 | buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx); |
404 | buck2_exit: | |
50f19a45 LM |
405 | dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name, |
406 | gpio_get_value(pdata->buck2_set3)); | |
407 | } else { | |
baae019e | 408 | ret = max8998_write_reg(i2c, reg, selector); |
50f19a45 LM |
409 | } |
410 | break; | |
411 | ||
412 | case MAX8998_BUCK3: | |
413 | case MAX8998_BUCK4: | |
baae019e AL |
414 | ret = max8998_update_reg(i2c, reg, selector<<shift, |
415 | mask<<shift); | |
50f19a45 | 416 | break; |
c5a4655d MH |
417 | } |
418 | ||
276909d3 AL |
419 | return ret; |
420 | } | |
421 | ||
422 | static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev, | |
423 | unsigned int old_selector, | |
424 | unsigned int new_selector) | |
425 | { | |
426 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
427 | struct i2c_client *i2c = max8998->iodev->i2c; | |
428 | const struct voltage_map_desc *desc; | |
429 | int buck = rdev_get_id(rdev); | |
430 | u8 val = 0; | |
431 | int difference, ret; | |
432 | ||
433 | if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4) | |
434 | return -EINVAL; | |
435 | ||
436 | desc = ldo_voltage_map[buck]; | |
437 | ||
50f19a45 | 438 | /* Voltage stabilization */ |
276909d3 AL |
439 | ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val); |
440 | if (ret) | |
441 | return ret; | |
50f19a45 LM |
442 | |
443 | /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */ | |
444 | /* MAX8998 has ENRAMP bit implemented, so test it*/ | |
445 | if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP)) | |
276909d3 | 446 | return 0; |
50f19a45 | 447 | |
276909d3 | 448 | difference = (new_selector - old_selector) * desc->step; |
50f19a45 | 449 | if (difference > 0) |
276909d3 | 450 | return difference / ((val & 0x0f) + 1); |
50f19a45 | 451 | |
276909d3 | 452 | return 0; |
156f2528 KP |
453 | } |
454 | ||
455 | static struct regulator_ops max8998_ldo_ops = { | |
9a0fbb62 | 456 | .list_voltage = regulator_list_voltage_linear, |
baae019e | 457 | .map_voltage = regulator_map_voltage_linear, |
156f2528 KP |
458 | .is_enabled = max8998_ldo_is_enabled, |
459 | .enable = max8998_ldo_enable, | |
460 | .disable = max8998_ldo_disable, | |
7b4354b4 | 461 | .get_voltage_sel = max8998_get_voltage_sel, |
baae019e | 462 | .set_voltage_sel = max8998_set_voltage_ldo_sel, |
156f2528 KP |
463 | }; |
464 | ||
465 | static struct regulator_ops max8998_buck_ops = { | |
9a0fbb62 | 466 | .list_voltage = regulator_list_voltage_linear, |
baae019e | 467 | .map_voltage = regulator_map_voltage_linear, |
156f2528 KP |
468 | .is_enabled = max8998_ldo_is_enabled, |
469 | .enable = max8998_ldo_enable, | |
470 | .disable = max8998_ldo_disable, | |
7b4354b4 | 471 | .get_voltage_sel = max8998_get_voltage_sel, |
baae019e | 472 | .set_voltage_sel = max8998_set_voltage_buck_sel, |
276909d3 | 473 | .set_voltage_time_sel = max8998_set_voltage_buck_time_sel, |
156f2528 KP |
474 | }; |
475 | ||
476 | static struct regulator_ops max8998_others_ops = { | |
477 | .is_enabled = max8998_ldo_is_enabled, | |
478 | .enable = max8998_ldo_enable, | |
479 | .disable = max8998_ldo_disable, | |
156f2528 KP |
480 | }; |
481 | ||
482 | static struct regulator_desc regulators[] = { | |
483 | { | |
484 | .name = "LDO2", | |
485 | .id = MAX8998_LDO2, | |
486 | .ops = &max8998_ldo_ops, | |
487 | .type = REGULATOR_VOLTAGE, | |
488 | .owner = THIS_MODULE, | |
489 | }, { | |
490 | .name = "LDO3", | |
491 | .id = MAX8998_LDO3, | |
492 | .ops = &max8998_ldo_ops, | |
493 | .type = REGULATOR_VOLTAGE, | |
494 | .owner = THIS_MODULE, | |
495 | }, { | |
496 | .name = "LDO4", | |
497 | .id = MAX8998_LDO4, | |
498 | .ops = &max8998_ldo_ops, | |
499 | .type = REGULATOR_VOLTAGE, | |
500 | .owner = THIS_MODULE, | |
501 | }, { | |
502 | .name = "LDO5", | |
503 | .id = MAX8998_LDO5, | |
504 | .ops = &max8998_ldo_ops, | |
505 | .type = REGULATOR_VOLTAGE, | |
506 | .owner = THIS_MODULE, | |
507 | }, { | |
508 | .name = "LDO6", | |
509 | .id = MAX8998_LDO6, | |
510 | .ops = &max8998_ldo_ops, | |
511 | .type = REGULATOR_VOLTAGE, | |
512 | .owner = THIS_MODULE, | |
513 | }, { | |
514 | .name = "LDO7", | |
515 | .id = MAX8998_LDO7, | |
516 | .ops = &max8998_ldo_ops, | |
517 | .type = REGULATOR_VOLTAGE, | |
518 | .owner = THIS_MODULE, | |
519 | }, { | |
520 | .name = "LDO8", | |
521 | .id = MAX8998_LDO8, | |
522 | .ops = &max8998_ldo_ops, | |
523 | .type = REGULATOR_VOLTAGE, | |
524 | .owner = THIS_MODULE, | |
525 | }, { | |
526 | .name = "LDO9", | |
527 | .id = MAX8998_LDO9, | |
528 | .ops = &max8998_ldo_ops, | |
529 | .type = REGULATOR_VOLTAGE, | |
530 | .owner = THIS_MODULE, | |
531 | }, { | |
532 | .name = "LDO10", | |
533 | .id = MAX8998_LDO10, | |
534 | .ops = &max8998_ldo_ops, | |
535 | .type = REGULATOR_VOLTAGE, | |
536 | .owner = THIS_MODULE, | |
537 | }, { | |
538 | .name = "LDO11", | |
539 | .id = MAX8998_LDO11, | |
540 | .ops = &max8998_ldo_ops, | |
541 | .type = REGULATOR_VOLTAGE, | |
542 | .owner = THIS_MODULE, | |
543 | }, { | |
544 | .name = "LDO12", | |
545 | .id = MAX8998_LDO12, | |
546 | .ops = &max8998_ldo_ops, | |
547 | .type = REGULATOR_VOLTAGE, | |
548 | .owner = THIS_MODULE, | |
549 | }, { | |
550 | .name = "LDO13", | |
551 | .id = MAX8998_LDO13, | |
552 | .ops = &max8998_ldo_ops, | |
553 | .type = REGULATOR_VOLTAGE, | |
554 | .owner = THIS_MODULE, | |
555 | }, { | |
556 | .name = "LDO14", | |
557 | .id = MAX8998_LDO14, | |
558 | .ops = &max8998_ldo_ops, | |
559 | .type = REGULATOR_VOLTAGE, | |
560 | .owner = THIS_MODULE, | |
561 | }, { | |
562 | .name = "LDO15", | |
563 | .id = MAX8998_LDO15, | |
564 | .ops = &max8998_ldo_ops, | |
565 | .type = REGULATOR_VOLTAGE, | |
566 | .owner = THIS_MODULE, | |
567 | }, { | |
568 | .name = "LDO16", | |
569 | .id = MAX8998_LDO16, | |
570 | .ops = &max8998_ldo_ops, | |
571 | .type = REGULATOR_VOLTAGE, | |
572 | .owner = THIS_MODULE, | |
573 | }, { | |
574 | .name = "LDO17", | |
575 | .id = MAX8998_LDO17, | |
576 | .ops = &max8998_ldo_ops, | |
577 | .type = REGULATOR_VOLTAGE, | |
578 | .owner = THIS_MODULE, | |
579 | }, { | |
580 | .name = "BUCK1", | |
581 | .id = MAX8998_BUCK1, | |
582 | .ops = &max8998_buck_ops, | |
583 | .type = REGULATOR_VOLTAGE, | |
584 | .owner = THIS_MODULE, | |
585 | }, { | |
586 | .name = "BUCK2", | |
587 | .id = MAX8998_BUCK2, | |
588 | .ops = &max8998_buck_ops, | |
589 | .type = REGULATOR_VOLTAGE, | |
590 | .owner = THIS_MODULE, | |
591 | }, { | |
592 | .name = "BUCK3", | |
593 | .id = MAX8998_BUCK3, | |
594 | .ops = &max8998_buck_ops, | |
595 | .type = REGULATOR_VOLTAGE, | |
596 | .owner = THIS_MODULE, | |
597 | }, { | |
598 | .name = "BUCK4", | |
599 | .id = MAX8998_BUCK4, | |
600 | .ops = &max8998_buck_ops, | |
601 | .type = REGULATOR_VOLTAGE, | |
602 | .owner = THIS_MODULE, | |
603 | }, { | |
604 | .name = "EN32KHz AP", | |
605 | .id = MAX8998_EN32KHZ_AP, | |
606 | .ops = &max8998_others_ops, | |
607 | .type = REGULATOR_VOLTAGE, | |
608 | .owner = THIS_MODULE, | |
609 | }, { | |
610 | .name = "EN32KHz CP", | |
611 | .id = MAX8998_EN32KHZ_CP, | |
612 | .ops = &max8998_others_ops, | |
613 | .type = REGULATOR_VOLTAGE, | |
614 | .owner = THIS_MODULE, | |
615 | }, { | |
616 | .name = "ENVICHG", | |
617 | .id = MAX8998_ENVICHG, | |
618 | .ops = &max8998_others_ops, | |
619 | .type = REGULATOR_VOLTAGE, | |
620 | .owner = THIS_MODULE, | |
621 | }, { | |
622 | .name = "ESAFEOUT1", | |
623 | .id = MAX8998_ESAFEOUT1, | |
624 | .ops = &max8998_others_ops, | |
625 | .type = REGULATOR_VOLTAGE, | |
626 | .owner = THIS_MODULE, | |
627 | }, { | |
628 | .name = "ESAFEOUT2", | |
629 | .id = MAX8998_ESAFEOUT2, | |
630 | .ops = &max8998_others_ops, | |
631 | .type = REGULATOR_VOLTAGE, | |
632 | .owner = THIS_MODULE, | |
633 | } | |
634 | }; | |
635 | ||
636 | static __devinit int max8998_pmic_probe(struct platform_device *pdev) | |
637 | { | |
638 | struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
639 | struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev); | |
c172708d | 640 | struct regulator_config config = { }; |
156f2528 KP |
641 | struct regulator_dev **rdev; |
642 | struct max8998_data *max8998; | |
50f19a45 | 643 | struct i2c_client *i2c; |
156f2528 KP |
644 | int i, ret, size; |
645 | ||
646 | if (!pdata) { | |
647 | dev_err(pdev->dev.parent, "No platform init data supplied\n"); | |
648 | return -ENODEV; | |
649 | } | |
650 | ||
0f80ea14 AL |
651 | max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data), |
652 | GFP_KERNEL); | |
156f2528 KP |
653 | if (!max8998) |
654 | return -ENOMEM; | |
655 | ||
11fa0d1d | 656 | size = sizeof(struct regulator_dev *) * pdata->num_regulators; |
0f80ea14 AL |
657 | max8998->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); |
658 | if (!max8998->rdev) | |
156f2528 | 659 | return -ENOMEM; |
156f2528 KP |
660 | |
661 | rdev = max8998->rdev; | |
747cc851 | 662 | max8998->dev = &pdev->dev; |
156f2528 | 663 | max8998->iodev = iodev; |
c356cbc2 | 664 | max8998->num_regulators = pdata->num_regulators; |
156f2528 | 665 | platform_set_drvdata(pdev, max8998); |
50f19a45 LM |
666 | i2c = max8998->iodev->i2c; |
667 | ||
735a3d9e MH |
668 | max8998->buck1_idx = pdata->buck1_default_idx; |
669 | max8998->buck2_idx = pdata->buck2_default_idx; | |
670 | ||
50f19a45 LM |
671 | /* NOTE: */ |
672 | /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */ | |
673 | /* will be displayed */ | |
674 | ||
675 | /* Check if MAX8998 voltage selection GPIOs are defined */ | |
676 | if (gpio_is_valid(pdata->buck1_set1) && | |
677 | gpio_is_valid(pdata->buck1_set2)) { | |
678 | /* Check if SET1 is not equal to 0 */ | |
679 | if (!pdata->buck1_set1) { | |
680 | printk(KERN_ERR "MAX8998 SET1 GPIO defined as 0 !\n"); | |
681 | WARN_ON(!pdata->buck1_set1); | |
6be6e96f | 682 | ret = -EIO; |
0f80ea14 | 683 | goto err_out; |
50f19a45 LM |
684 | } |
685 | /* Check if SET2 is not equal to 0 */ | |
686 | if (!pdata->buck1_set2) { | |
687 | printk(KERN_ERR "MAX8998 SET2 GPIO defined as 0 !\n"); | |
688 | WARN_ON(!pdata->buck1_set2); | |
6be6e96f | 689 | ret = -EIO; |
0f80ea14 | 690 | goto err_out; |
50f19a45 LM |
691 | } |
692 | ||
693 | gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1"); | |
694 | gpio_direction_output(pdata->buck1_set1, | |
695 | max8998->buck1_idx & 0x1); | |
696 | ||
697 | ||
698 | gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2"); | |
699 | gpio_direction_output(pdata->buck1_set2, | |
700 | (max8998->buck1_idx >> 1) & 0x1); | |
701 | /* Set predefined value for BUCK1 register 1 */ | |
702 | i = 0; | |
703 | while (buck12_voltage_map_desc.min + | |
704 | buck12_voltage_map_desc.step*i | |
735a3d9e | 705 | < (pdata->buck1_voltage1 / 1000)) |
50f19a45 | 706 | i++; |
50f19a45 LM |
707 | max8998->buck1_vol[0] = i; |
708 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1, i); | |
735a3d9e | 709 | if (ret) |
0f80ea14 | 710 | goto err_out; |
50f19a45 LM |
711 | |
712 | /* Set predefined value for BUCK1 register 2 */ | |
713 | i = 0; | |
714 | while (buck12_voltage_map_desc.min + | |
715 | buck12_voltage_map_desc.step*i | |
735a3d9e | 716 | < (pdata->buck1_voltage2 / 1000)) |
50f19a45 LM |
717 | i++; |
718 | ||
719 | max8998->buck1_vol[1] = i; | |
735a3d9e MH |
720 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE2, i); |
721 | if (ret) | |
0f80ea14 | 722 | goto err_out; |
735a3d9e MH |
723 | |
724 | /* Set predefined value for BUCK1 register 3 */ | |
725 | i = 0; | |
726 | while (buck12_voltage_map_desc.min + | |
727 | buck12_voltage_map_desc.step*i | |
728 | < (pdata->buck1_voltage3 / 1000)) | |
729 | i++; | |
730 | ||
731 | max8998->buck1_vol[2] = i; | |
732 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE3, i); | |
733 | if (ret) | |
0f80ea14 | 734 | goto err_out; |
735a3d9e MH |
735 | |
736 | /* Set predefined value for BUCK1 register 4 */ | |
737 | i = 0; | |
738 | while (buck12_voltage_map_desc.min + | |
739 | buck12_voltage_map_desc.step*i | |
740 | < (pdata->buck1_voltage4 / 1000)) | |
741 | i++; | |
742 | ||
743 | max8998->buck1_vol[3] = i; | |
744 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE4, i); | |
50f19a45 | 745 | if (ret) |
0f80ea14 | 746 | goto err_out; |
50f19a45 LM |
747 | |
748 | } | |
749 | ||
750 | if (gpio_is_valid(pdata->buck2_set3)) { | |
751 | /* Check if SET3 is not equal to 0 */ | |
752 | if (!pdata->buck2_set3) { | |
753 | printk(KERN_ERR "MAX8998 SET3 GPIO defined as 0 !\n"); | |
754 | WARN_ON(!pdata->buck2_set3); | |
6be6e96f | 755 | ret = -EIO; |
0f80ea14 | 756 | goto err_out; |
50f19a45 LM |
757 | } |
758 | gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3"); | |
759 | gpio_direction_output(pdata->buck2_set3, | |
760 | max8998->buck2_idx & 0x1); | |
761 | ||
735a3d9e | 762 | /* BUCK2 register 1 */ |
50f19a45 LM |
763 | i = 0; |
764 | while (buck12_voltage_map_desc.min + | |
765 | buck12_voltage_map_desc.step*i | |
735a3d9e | 766 | < (pdata->buck2_voltage1 / 1000)) |
50f19a45 | 767 | i++; |
50f19a45 LM |
768 | max8998->buck2_vol[0] = i; |
769 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1, i); | |
770 | if (ret) | |
0f80ea14 | 771 | goto err_out; |
50f19a45 | 772 | |
735a3d9e MH |
773 | /* BUCK2 register 2 */ |
774 | i = 0; | |
775 | while (buck12_voltage_map_desc.min + | |
776 | buck12_voltage_map_desc.step*i | |
777 | < (pdata->buck2_voltage2 / 1000)) | |
778 | i++; | |
735a3d9e MH |
779 | max8998->buck2_vol[1] = i; |
780 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE2, i); | |
781 | if (ret) | |
0f80ea14 | 782 | goto err_out; |
50f19a45 | 783 | } |
156f2528 KP |
784 | |
785 | for (i = 0; i < pdata->num_regulators; i++) { | |
786 | const struct voltage_map_desc *desc; | |
787 | int id = pdata->regulators[i].id; | |
788 | int index = id - MAX8998_LDO2; | |
789 | ||
790 | desc = ldo_voltage_map[id]; | |
791 | if (desc && regulators[index].ops != &max8998_others_ops) { | |
792 | int count = (desc->max - desc->min) / desc->step + 1; | |
9a0fbb62 | 793 | |
156f2528 | 794 | regulators[index].n_voltages = count; |
9a0fbb62 AL |
795 | regulators[index].min_uV = desc->min * 1000; |
796 | regulators[index].uV_step = desc->step * 1000; | |
156f2528 | 797 | } |
c172708d MB |
798 | |
799 | config.dev = max8998->dev; | |
800 | config.init_data = pdata->regulators[i].initdata; | |
801 | config.driver_data = max8998; | |
802 | ||
803 | rdev[i] = regulator_register(®ulators[index], &config); | |
156f2528 KP |
804 | if (IS_ERR(rdev[i])) { |
805 | ret = PTR_ERR(rdev[i]); | |
806 | dev_err(max8998->dev, "regulator init failed\n"); | |
807 | rdev[i] = NULL; | |
808 | goto err; | |
809 | } | |
810 | } | |
811 | ||
812 | ||
813 | return 0; | |
814 | err: | |
0f80ea14 AL |
815 | while (--i >= 0) |
816 | regulator_unregister(rdev[i]); | |
817 | err_out: | |
156f2528 KP |
818 | return ret; |
819 | } | |
820 | ||
821 | static int __devexit max8998_pmic_remove(struct platform_device *pdev) | |
822 | { | |
823 | struct max8998_data *max8998 = platform_get_drvdata(pdev); | |
824 | struct regulator_dev **rdev = max8998->rdev; | |
825 | int i; | |
826 | ||
11fa0d1d | 827 | for (i = 0; i < max8998->num_regulators; i++) |
0f80ea14 | 828 | regulator_unregister(rdev[i]); |
156f2528 KP |
829 | return 0; |
830 | } | |
831 | ||
337ce5d1 MH |
832 | static const struct platform_device_id max8998_pmic_id[] = { |
833 | { "max8998-pmic", TYPE_MAX8998 }, | |
834 | { "lp3974-pmic", TYPE_LP3974 }, | |
835 | { } | |
836 | }; | |
a51b907b | 837 | MODULE_DEVICE_TABLE(platform, max8998_pmic_id); |
337ce5d1 | 838 | |
156f2528 KP |
839 | static struct platform_driver max8998_pmic_driver = { |
840 | .driver = { | |
841 | .name = "max8998-pmic", | |
842 | .owner = THIS_MODULE, | |
843 | }, | |
844 | .probe = max8998_pmic_probe, | |
845 | .remove = __devexit_p(max8998_pmic_remove), | |
337ce5d1 | 846 | .id_table = max8998_pmic_id, |
156f2528 KP |
847 | }; |
848 | ||
849 | static int __init max8998_pmic_init(void) | |
850 | { | |
851 | return platform_driver_register(&max8998_pmic_driver); | |
852 | } | |
853 | subsys_initcall(max8998_pmic_init); | |
854 | ||
855 | static void __exit max8998_pmic_cleanup(void) | |
856 | { | |
857 | platform_driver_unregister(&max8998_pmic_driver); | |
858 | } | |
859 | module_exit(max8998_pmic_cleanup); | |
860 | ||
861 | MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver"); | |
862 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | |
863 | MODULE_LICENSE("GPL"); |