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c789ca20 SI |
1 | /* |
2 | * Copyright (C) ST-Ericsson SA 2010 | |
3 | * | |
4 | * License Terms: GNU General Public License v2 | |
5 | * | |
e1159e6d BJ |
6 | * Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson |
7 | * Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson | |
c789ca20 SI |
8 | * |
9 | * AB8500 peripheral regulators | |
10 | * | |
e1159e6d BJ |
11 | * AB8500 supports the following regulators: |
12 | * VAUX1/2/3, VINTCORE, VTVOUT, VAUDIO, VAMIC1/2, VDMIC, VANA | |
c789ca20 SI |
13 | */ |
14 | #include <linux/init.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/err.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/mfd/ab8500.h> | |
47c16975 | 19 | #include <linux/mfd/abx500.h> |
c789ca20 SI |
20 | #include <linux/regulator/driver.h> |
21 | #include <linux/regulator/machine.h> | |
22 | #include <linux/regulator/ab8500.h> | |
23 | ||
24 | /** | |
25 | * struct ab8500_regulator_info - ab8500 regulator information | |
e1159e6d | 26 | * @dev: device pointer |
c789ca20 | 27 | * @desc: regulator description |
c789ca20 SI |
28 | * @regulator_dev: regulator device |
29 | * @max_uV: maximum voltage (for variable voltage supplies) | |
30 | * @min_uV: minimum voltage (for variable voltage supplies) | |
31 | * @fixed_uV: typical voltage (for fixed voltage supplies) | |
47c16975 | 32 | * @update_bank: bank to control on/off |
c789ca20 | 33 | * @update_reg: register to control on/off |
e1159e6d BJ |
34 | * @update_mask: mask to enable/disable regulator |
35 | * @update_val_enable: bits to enable the regulator in normal (high power) mode | |
47c16975 | 36 | * @voltage_bank: bank to control regulator voltage |
c789ca20 SI |
37 | * @voltage_reg: register to control regulator voltage |
38 | * @voltage_mask: mask to control regulator voltage | |
e1159e6d | 39 | * @voltages: supported voltage table |
c789ca20 SI |
40 | * @voltages_len: number of supported voltages for the regulator |
41 | */ | |
42 | struct ab8500_regulator_info { | |
43 | struct device *dev; | |
44 | struct regulator_desc desc; | |
c789ca20 SI |
45 | struct regulator_dev *regulator; |
46 | int max_uV; | |
47 | int min_uV; | |
48 | int fixed_uV; | |
47c16975 MW |
49 | u8 update_bank; |
50 | u8 update_reg; | |
e1159e6d BJ |
51 | u8 update_mask; |
52 | u8 update_val_enable; | |
47c16975 MW |
53 | u8 voltage_bank; |
54 | u8 voltage_reg; | |
55 | u8 voltage_mask; | |
e1159e6d | 56 | int const *voltages; |
c789ca20 SI |
57 | int voltages_len; |
58 | }; | |
59 | ||
60 | /* voltage tables for the vauxn/vintcore supplies */ | |
61 | static const int ldo_vauxn_voltages[] = { | |
62 | 1100000, | |
63 | 1200000, | |
64 | 1300000, | |
65 | 1400000, | |
66 | 1500000, | |
67 | 1800000, | |
68 | 1850000, | |
69 | 1900000, | |
70 | 2500000, | |
71 | 2650000, | |
72 | 2700000, | |
73 | 2750000, | |
74 | 2800000, | |
75 | 2900000, | |
76 | 3000000, | |
77 | 3300000, | |
78 | }; | |
79 | ||
2b75151a BJ |
80 | static const int ldo_vaux3_voltages[] = { |
81 | 1200000, | |
82 | 1500000, | |
83 | 1800000, | |
84 | 2100000, | |
85 | 2500000, | |
86 | 2750000, | |
87 | 2790000, | |
88 | 2910000, | |
89 | }; | |
90 | ||
c789ca20 SI |
91 | static const int ldo_vintcore_voltages[] = { |
92 | 1200000, | |
93 | 1225000, | |
94 | 1250000, | |
95 | 1275000, | |
96 | 1300000, | |
97 | 1325000, | |
98 | 1350000, | |
99 | }; | |
100 | ||
101 | static int ab8500_regulator_enable(struct regulator_dev *rdev) | |
102 | { | |
fc24b426 | 103 | int ret; |
c789ca20 SI |
104 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); |
105 | ||
fc24b426 BJ |
106 | if (info == NULL) { |
107 | dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); | |
c789ca20 | 108 | return -EINVAL; |
fc24b426 | 109 | } |
c789ca20 | 110 | |
47c16975 | 111 | ret = abx500_mask_and_set_register_interruptible(info->dev, |
e1159e6d BJ |
112 | info->update_bank, info->update_reg, |
113 | info->update_mask, info->update_val_enable); | |
c789ca20 SI |
114 | if (ret < 0) |
115 | dev_err(rdev_get_dev(rdev), | |
116 | "couldn't set enable bits for regulator\n"); | |
117 | return ret; | |
118 | } | |
119 | ||
120 | static int ab8500_regulator_disable(struct regulator_dev *rdev) | |
121 | { | |
fc24b426 | 122 | int ret; |
c789ca20 SI |
123 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); |
124 | ||
fc24b426 BJ |
125 | if (info == NULL) { |
126 | dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); | |
c789ca20 | 127 | return -EINVAL; |
fc24b426 | 128 | } |
c789ca20 | 129 | |
47c16975 | 130 | ret = abx500_mask_and_set_register_interruptible(info->dev, |
e1159e6d BJ |
131 | info->update_bank, info->update_reg, |
132 | info->update_mask, 0x0); | |
c789ca20 SI |
133 | if (ret < 0) |
134 | dev_err(rdev_get_dev(rdev), | |
135 | "couldn't set disable bits for regulator\n"); | |
136 | return ret; | |
137 | } | |
138 | ||
139 | static int ab8500_regulator_is_enabled(struct regulator_dev *rdev) | |
140 | { | |
fc24b426 | 141 | int ret; |
c789ca20 | 142 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); |
47c16975 | 143 | u8 value; |
c789ca20 | 144 | |
fc24b426 BJ |
145 | if (info == NULL) { |
146 | dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); | |
c789ca20 | 147 | return -EINVAL; |
fc24b426 | 148 | } |
c789ca20 | 149 | |
47c16975 MW |
150 | ret = abx500_get_register_interruptible(info->dev, |
151 | info->update_bank, info->update_reg, &value); | |
c789ca20 SI |
152 | if (ret < 0) { |
153 | dev_err(rdev_get_dev(rdev), | |
154 | "couldn't read 0x%x register\n", info->update_reg); | |
155 | return ret; | |
156 | } | |
157 | ||
e1159e6d | 158 | if (value & info->update_mask) |
c789ca20 SI |
159 | return true; |
160 | else | |
161 | return false; | |
162 | } | |
163 | ||
164 | static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector) | |
165 | { | |
c789ca20 SI |
166 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); |
167 | ||
fc24b426 BJ |
168 | if (info == NULL) { |
169 | dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); | |
c789ca20 | 170 | return -EINVAL; |
fc24b426 | 171 | } |
c789ca20 SI |
172 | |
173 | /* return the uV for the fixed regulators */ | |
174 | if (info->fixed_uV) | |
175 | return info->fixed_uV; | |
176 | ||
49990e6e | 177 | if (selector >= info->voltages_len) |
c789ca20 SI |
178 | return -EINVAL; |
179 | ||
e1159e6d | 180 | return info->voltages[selector]; |
c789ca20 SI |
181 | } |
182 | ||
183 | static int ab8500_regulator_get_voltage(struct regulator_dev *rdev) | |
184 | { | |
fc24b426 | 185 | int ret; |
c789ca20 | 186 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); |
47c16975 | 187 | u8 value; |
c789ca20 | 188 | |
fc24b426 BJ |
189 | if (info == NULL) { |
190 | dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); | |
c789ca20 | 191 | return -EINVAL; |
fc24b426 | 192 | } |
c789ca20 | 193 | |
47c16975 MW |
194 | ret = abx500_get_register_interruptible(info->dev, info->voltage_bank, |
195 | info->voltage_reg, &value); | |
c789ca20 SI |
196 | if (ret < 0) { |
197 | dev_err(rdev_get_dev(rdev), | |
198 | "couldn't read voltage reg for regulator\n"); | |
199 | return ret; | |
200 | } | |
201 | ||
202 | /* vintcore has a different layout */ | |
47c16975 | 203 | value &= info->voltage_mask; |
fc24b426 | 204 | if (info->desc.id == AB8500_LDO_INTCORE) |
e1159e6d | 205 | ret = info->voltages[value >> 0x3]; |
c789ca20 | 206 | else |
e1159e6d | 207 | ret = info->voltages[value]; |
c789ca20 SI |
208 | |
209 | return ret; | |
210 | } | |
211 | ||
212 | static int ab8500_get_best_voltage_index(struct regulator_dev *rdev, | |
213 | int min_uV, int max_uV) | |
214 | { | |
215 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
216 | int i; | |
217 | ||
218 | /* check the supported voltage */ | |
219 | for (i = 0; i < info->voltages_len; i++) { | |
e1159e6d BJ |
220 | if ((info->voltages[i] >= min_uV) && |
221 | (info->voltages[i] <= max_uV)) | |
c789ca20 SI |
222 | return i; |
223 | } | |
224 | ||
225 | return -EINVAL; | |
226 | } | |
227 | ||
228 | static int ab8500_regulator_set_voltage(struct regulator_dev *rdev, | |
3a93f2a9 MB |
229 | int min_uV, int max_uV, |
230 | unsigned *selector) | |
c789ca20 | 231 | { |
fc24b426 | 232 | int ret; |
c789ca20 SI |
233 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); |
234 | ||
fc24b426 BJ |
235 | if (info == NULL) { |
236 | dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); | |
c789ca20 | 237 | return -EINVAL; |
fc24b426 | 238 | } |
c789ca20 SI |
239 | |
240 | /* get the appropriate voltages within the range */ | |
241 | ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV); | |
242 | if (ret < 0) { | |
243 | dev_err(rdev_get_dev(rdev), | |
244 | "couldn't get best voltage for regulator\n"); | |
245 | return ret; | |
246 | } | |
247 | ||
3a93f2a9 MB |
248 | *selector = ret; |
249 | ||
c789ca20 | 250 | /* set the registers for the request */ |
47c16975 MW |
251 | ret = abx500_mask_and_set_register_interruptible(info->dev, |
252 | info->voltage_bank, info->voltage_reg, | |
253 | info->voltage_mask, (u8)ret); | |
c789ca20 SI |
254 | if (ret < 0) |
255 | dev_err(rdev_get_dev(rdev), | |
256 | "couldn't set voltage reg for regulator\n"); | |
257 | ||
258 | return ret; | |
259 | } | |
260 | ||
261 | static struct regulator_ops ab8500_regulator_ops = { | |
262 | .enable = ab8500_regulator_enable, | |
263 | .disable = ab8500_regulator_disable, | |
264 | .is_enabled = ab8500_regulator_is_enabled, | |
265 | .get_voltage = ab8500_regulator_get_voltage, | |
266 | .set_voltage = ab8500_regulator_set_voltage, | |
267 | .list_voltage = ab8500_list_voltage, | |
268 | }; | |
269 | ||
270 | static int ab8500_fixed_get_voltage(struct regulator_dev *rdev) | |
271 | { | |
c789ca20 SI |
272 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); |
273 | ||
fc24b426 BJ |
274 | if (info == NULL) { |
275 | dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); | |
c789ca20 | 276 | return -EINVAL; |
fc24b426 | 277 | } |
c789ca20 SI |
278 | |
279 | return info->fixed_uV; | |
280 | } | |
281 | ||
282 | static struct regulator_ops ab8500_ldo_fixed_ops = { | |
283 | .enable = ab8500_regulator_enable, | |
284 | .disable = ab8500_regulator_disable, | |
285 | .is_enabled = ab8500_regulator_is_enabled, | |
286 | .get_voltage = ab8500_fixed_get_voltage, | |
287 | .list_voltage = ab8500_list_voltage, | |
288 | }; | |
289 | ||
e1159e6d BJ |
290 | #define AB8500_LDO(_id, _min_mV, _max_mV, \ |
291 | _u_bank, _u_reg, _u_mask, _u_val_enable, \ | |
292 | _v_bank, _v_reg, _v_mask, _v_table, _v_table_len) \ | |
293 | [AB8500_LDO_##_id] = { \ | |
c789ca20 | 294 | .desc = { \ |
e1159e6d BJ |
295 | .name = "LDO-" #_id, \ |
296 | .ops = &ab8500_regulator_ops, \ | |
297 | .type = REGULATOR_VOLTAGE, \ | |
298 | .id = AB8500_LDO_##_id, \ | |
299 | .owner = THIS_MODULE, \ | |
c789ca20 | 300 | }, \ |
e1159e6d BJ |
301 | .min_uV = (_min_mV) * 1000, \ |
302 | .max_uV = (_max_mV) * 1000, \ | |
303 | .update_bank = _u_bank, \ | |
304 | .update_reg = _u_reg, \ | |
305 | .update_mask = _u_mask, \ | |
306 | .update_val_enable = _u_val_enable, \ | |
307 | .voltage_bank = _v_bank, \ | |
308 | .voltage_reg = _v_reg, \ | |
309 | .voltage_mask = _v_mask, \ | |
310 | .voltages = _v_table, \ | |
311 | .voltages_len = _v_table_len, \ | |
312 | .fixed_uV = 0, \ | |
c789ca20 SI |
313 | } |
314 | ||
e1159e6d BJ |
315 | #define AB8500_FIXED_LDO(_id, _fixed_mV, \ |
316 | _u_bank, _u_reg, _u_mask, _u_val_enable) \ | |
317 | [AB8500_LDO_##_id] = { \ | |
318 | .desc = { \ | |
319 | .name = "LDO-" #_id, \ | |
320 | .ops = &ab8500_ldo_fixed_ops, \ | |
321 | .type = REGULATOR_VOLTAGE, \ | |
322 | .id = AB8500_LDO_##_id, \ | |
323 | .owner = THIS_MODULE, \ | |
324 | }, \ | |
325 | .fixed_uV = (_fixed_mV) * 1000, \ | |
326 | .update_bank = _u_bank, \ | |
327 | .update_reg = _u_reg, \ | |
328 | .update_mask = _u_mask, \ | |
329 | .update_val_enable = _u_val_enable, \ | |
c789ca20 SI |
330 | } |
331 | ||
332 | static struct ab8500_regulator_info ab8500_regulator_info[] = { | |
333 | /* | |
e1159e6d BJ |
334 | * Variable Voltage Regulators |
335 | * name, min mV, max mV, | |
336 | * update bank, reg, mask, enable val | |
337 | * volt bank, reg, mask, table, table length | |
c789ca20 | 338 | */ |
e1159e6d BJ |
339 | AB8500_LDO(AUX1, 1100, 3300, |
340 | 0x04, 0x09, 0x03, 0x01, 0x04, 0x1f, 0x0f, | |
341 | ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)), | |
342 | AB8500_LDO(AUX2, 1100, 3300, | |
343 | 0x04, 0x09, 0x0c, 0x04, 0x04, 0x20, 0x0f, | |
344 | ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)), | |
345 | AB8500_LDO(AUX3, 1100, 3300, | |
346 | 0x04, 0x0a, 0x03, 0x01, 0x04, 0x21, 0x07, | |
347 | ldo_vaux3_voltages, ARRAY_SIZE(ldo_vaux3_voltages)), | |
348 | AB8500_LDO(INTCORE, 1100, 3300, | |
349 | 0x03, 0x80, 0x44, 0x04, 0x03, 0x80, 0x38, | |
c789ca20 SI |
350 | ldo_vintcore_voltages, ARRAY_SIZE(ldo_vintcore_voltages)), |
351 | ||
352 | /* | |
e1159e6d BJ |
353 | * Fixed Voltage Regulators |
354 | * name, fixed mV, | |
355 | * update bank, reg, mask, enable val | |
c789ca20 | 356 | */ |
e1159e6d BJ |
357 | AB8500_FIXED_LDO(TVOUT, 2000, 0x03, 0x80, 0x82, 0x02), |
358 | AB8500_FIXED_LDO(AUDIO, 2000, 0x03, 0x83, 0x02, 0x02), | |
359 | AB8500_FIXED_LDO(ANAMIC1, 2050, 0x03, 0x83, 0x08, 0x08), | |
360 | AB8500_FIXED_LDO(ANAMIC2, 2050, 0x03, 0x83, 0x10, 0x10), | |
361 | AB8500_FIXED_LDO(DMIC, 1800, 0x03, 0x83, 0x04, 0x04), | |
362 | AB8500_FIXED_LDO(ANA, 1200, 0x04, 0x06, 0x0c, 0x04), | |
c789ca20 SI |
363 | }; |
364 | ||
c789ca20 SI |
365 | static __devinit int ab8500_regulator_probe(struct platform_device *pdev) |
366 | { | |
367 | struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent); | |
af54decd | 368 | struct ab8500_platform_data *pdata; |
c789ca20 SI |
369 | int i, err; |
370 | ||
371 | if (!ab8500) { | |
372 | dev_err(&pdev->dev, "null mfd parent\n"); | |
373 | return -EINVAL; | |
374 | } | |
af54decd | 375 | pdata = dev_get_platdata(ab8500->dev); |
fc24b426 BJ |
376 | if (!pdata) { |
377 | dev_err(&pdev->dev, "null pdata\n"); | |
378 | return -EINVAL; | |
379 | } | |
c789ca20 | 380 | |
cb189b07 BJ |
381 | /* make sure the platform data has the correct size */ |
382 | if (pdata->num_regulator != ARRAY_SIZE(ab8500_regulator_info)) { | |
383 | dev_err(&pdev->dev, "platform configuration error\n"); | |
384 | return -EINVAL; | |
385 | } | |
386 | ||
c789ca20 SI |
387 | /* register all regulators */ |
388 | for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) { | |
389 | struct ab8500_regulator_info *info = NULL; | |
390 | ||
391 | /* assign per-regulator data */ | |
392 | info = &ab8500_regulator_info[i]; | |
393 | info->dev = &pdev->dev; | |
c789ca20 | 394 | |
2b75151a BJ |
395 | /* fix for hardware before ab8500v2.0 */ |
396 | if (abx500_get_chip_id(info->dev) < 0x20) { | |
397 | if (info->desc.id == AB8500_LDO_AUX3) { | |
398 | info->desc.n_voltages = | |
399 | ARRAY_SIZE(ldo_vauxn_voltages); | |
e1159e6d | 400 | info->voltages = ldo_vauxn_voltages; |
2b75151a BJ |
401 | info->voltages_len = |
402 | ARRAY_SIZE(ldo_vauxn_voltages); | |
403 | info->voltage_mask = 0xf; | |
404 | } | |
405 | } | |
406 | ||
407 | /* register regulator with framework */ | |
c789ca20 | 408 | info->regulator = regulator_register(&info->desc, &pdev->dev, |
cb189b07 | 409 | &pdata->regulator[i], info); |
c789ca20 SI |
410 | if (IS_ERR(info->regulator)) { |
411 | err = PTR_ERR(info->regulator); | |
412 | dev_err(&pdev->dev, "failed to register regulator %s\n", | |
413 | info->desc.name); | |
414 | /* when we fail, un-register all earlier regulators */ | |
d4876a3b | 415 | while (--i >= 0) { |
c789ca20 SI |
416 | info = &ab8500_regulator_info[i]; |
417 | regulator_unregister(info->regulator); | |
c789ca20 SI |
418 | } |
419 | return err; | |
420 | } | |
421 | } | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
426 | static __devexit int ab8500_regulator_remove(struct platform_device *pdev) | |
427 | { | |
428 | int i; | |
429 | ||
430 | for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) { | |
431 | struct ab8500_regulator_info *info = NULL; | |
432 | info = &ab8500_regulator_info[i]; | |
433 | regulator_unregister(info->regulator); | |
434 | } | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | static struct platform_driver ab8500_regulator_driver = { | |
440 | .probe = ab8500_regulator_probe, | |
441 | .remove = __devexit_p(ab8500_regulator_remove), | |
442 | .driver = { | |
443 | .name = "ab8500-regulator", | |
444 | .owner = THIS_MODULE, | |
445 | }, | |
446 | }; | |
447 | ||
448 | static int __init ab8500_regulator_init(void) | |
449 | { | |
450 | int ret; | |
451 | ||
452 | ret = platform_driver_register(&ab8500_regulator_driver); | |
453 | if (ret != 0) | |
454 | pr_err("Failed to register ab8500 regulator: %d\n", ret); | |
455 | ||
456 | return ret; | |
457 | } | |
458 | subsys_initcall(ab8500_regulator_init); | |
459 | ||
460 | static void __exit ab8500_regulator_exit(void) | |
461 | { | |
462 | platform_driver_unregister(&ab8500_regulator_driver); | |
463 | } | |
464 | module_exit(ab8500_regulator_exit); | |
465 | ||
466 | MODULE_LICENSE("GPL v2"); | |
467 | MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>"); | |
468 | MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC"); | |
469 | MODULE_ALIAS("platform:ab8500-regulator"); |