regulator: tps62360: Convert to devm_regmap_init_i2c()
[linux-2.6.git] / drivers / regulator / tps6586x-regulator.c
1 /*
2  * Regulator driver for TI TPS6586x
3  *
4  * Copyright (C) 2010 Compulab Ltd.
5  * Author: Mike Rapoport <mike@compulab.co.il>
6  *
7  * Based on da903x
8  * Copyright (C) 2006-2008 Marvell International Ltd.
9  * Copyright (C) 2008 Compulab Ltd.
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License version 2 as
13  * published by the Free Software Foundation.
14  */
15
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/err.h>
19 #include <linux/slab.h>
20 #include <linux/platform_device.h>
21 #include <linux/regulator/driver.h>
22 #include <linux/regulator/machine.h>
23 #include <linux/mfd/tps6586x.h>
24 #include <linux/delay.h>
25
26 /* supply control and voltage setting  */
27 #define TPS6586X_SUPPLYENA      0x10
28 #define TPS6586X_SUPPLYENB      0x11
29 #define TPS6586X_SUPPLYENC      0x12
30 #define TPS6586X_SUPPLYEND      0x13
31 #define TPS6586X_SUPPLYENE      0x14
32 #define TPS6586X_VCC1           0x20
33 #define TPS6586X_VCC2           0x21
34 #define TPS6586X_SM1V1          0x23
35 #define TPS6586X_SM1V2          0x24
36 #define TPS6586X_SM1SL          0x25
37 #define TPS6586X_SM0V1          0x26
38 #define TPS6586X_SM0V2          0x27
39 #define TPS6586X_SM0SL          0x28
40 #define TPS6586X_LDO2AV1        0x29
41 #define TPS6586X_LDO2AV2        0x2A
42 #define TPS6586X_LDO2BV1        0x2F
43 #define TPS6586X_LDO2BV2        0x30
44 #define TPS6586X_LDO4V1         0x32
45 #define TPS6586X_LDO4V2         0x33
46
47 /* converter settings  */
48 #define TPS6586X_SUPPLYV1       0x41
49 #define TPS6586X_SUPPLYV2       0x42
50 #define TPS6586X_SUPPLYV3       0x43
51 #define TPS6586X_SUPPLYV4       0x44
52 #define TPS6586X_SUPPLYV5       0x45
53 #define TPS6586X_SUPPLYV6       0x46
54 #define TPS6586X_SMODE1         0x47
55 #define TPS6586X_SMODE2         0x48
56
57 struct tps6586x_regulator {
58         struct regulator_desc desc;
59
60         int volt_reg;
61         int volt_shift;
62         int volt_nbits;
63         int enable_bit[2];
64         int enable_reg[2];
65         int *voltages;
66         int delay; /* delay in us for regulator to stabilize */
67
68         /* for DVM regulators */
69         int go_reg;
70         int go_bit;
71 };
72
73 static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev)
74 {
75         return rdev_get_dev(rdev)->parent->parent;
76 }
77
78 static int tps6586x_ldo_list_voltage(struct regulator_dev *rdev,
79                                      unsigned selector)
80 {
81         struct tps6586x_regulator *info = rdev_get_drvdata(rdev);
82
83         return info->voltages[selector] * 1000;
84 }
85
86
87 static int __tps6586x_ldo_set_voltage(struct device *parent,
88                                       struct tps6586x_regulator *ri,
89                                       int min_uV, int max_uV,
90                                       unsigned *selector)
91 {
92         int val, uV;
93         uint8_t mask;
94
95         for (val = 0; val < ri->desc.n_voltages; val++) {
96                 uV = ri->voltages[val] * 1000;
97
98                 /* use the first in-range value */
99                 if (min_uV <= uV && uV <= max_uV) {
100
101                         *selector = val;
102
103                         val <<= ri->volt_shift;
104                         mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
105
106                         return tps6586x_update(parent, ri->volt_reg, val, mask);
107                 }
108         }
109
110         return -EINVAL;
111 }
112
113 static int tps6586x_ldo_set_voltage(struct regulator_dev *rdev,
114                                     int min_uV, int max_uV, unsigned *selector)
115 {
116         struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
117         struct device *parent = to_tps6586x_dev(rdev);
118
119         return __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV,
120                                           selector);
121 }
122
123 static int tps6586x_ldo_get_voltage(struct regulator_dev *rdev)
124 {
125         struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
126         struct device *parent = to_tps6586x_dev(rdev);
127         uint8_t val, mask;
128         int ret;
129
130         ret = tps6586x_read(parent, ri->volt_reg, &val);
131         if (ret)
132                 return ret;
133
134         mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
135         val = (val & mask) >> ri->volt_shift;
136
137         if (val >= ri->desc.n_voltages)
138                 BUG();
139
140         return ri->voltages[val] * 1000;
141 }
142
143 static int tps6586x_dvm_set_voltage(struct regulator_dev *rdev,
144                                     int min_uV, int max_uV, unsigned *selector)
145 {
146         struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
147         struct device *parent = to_tps6586x_dev(rdev);
148         int ret;
149
150         ret = __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV,
151                                          selector);
152         if (ret)
153                 return ret;
154
155         return tps6586x_set_bits(parent, ri->go_reg, 1 << ri->go_bit);
156 }
157
158 static int tps6586x_regulator_enable(struct regulator_dev *rdev)
159 {
160         struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
161         struct device *parent = to_tps6586x_dev(rdev);
162
163         return tps6586x_set_bits(parent, ri->enable_reg[0],
164                                  1 << ri->enable_bit[0]);
165 }
166
167 static int tps6586x_regulator_disable(struct regulator_dev *rdev)
168 {
169         struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
170         struct device *parent = to_tps6586x_dev(rdev);
171
172         return tps6586x_clr_bits(parent, ri->enable_reg[0],
173                                  1 << ri->enable_bit[0]);
174 }
175
176 static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev)
177 {
178         struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
179         struct device *parent = to_tps6586x_dev(rdev);
180         uint8_t reg_val;
181         int ret;
182
183         ret = tps6586x_read(parent, ri->enable_reg[0], &reg_val);
184         if (ret)
185                 return ret;
186
187         return !!(reg_val & (1 << ri->enable_bit[0]));
188 }
189
190 static int tps6586x_regulator_enable_time(struct regulator_dev *rdev)
191 {
192         struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
193
194         return ri->delay;
195 }
196
197 static struct regulator_ops tps6586x_regulator_ldo_ops = {
198         .list_voltage = tps6586x_ldo_list_voltage,
199         .get_voltage = tps6586x_ldo_get_voltage,
200         .set_voltage = tps6586x_ldo_set_voltage,
201         .enable_time = tps6586x_regulator_enable_time,
202         .is_enabled = tps6586x_regulator_is_enabled,
203         .enable = tps6586x_regulator_enable,
204         .disable = tps6586x_regulator_disable,
205 };
206
207 static struct regulator_ops tps6586x_regulator_dvm_ops = {
208         .list_voltage = tps6586x_ldo_list_voltage,
209         .get_voltage = tps6586x_ldo_get_voltage,
210         .set_voltage = tps6586x_dvm_set_voltage,
211         .enable_time = tps6586x_regulator_enable_time,
212         .is_enabled = tps6586x_regulator_is_enabled,
213         .enable = tps6586x_regulator_enable,
214         .disable = tps6586x_regulator_disable,
215 };
216
217 static int tps6586x_ldo_voltages[] = {
218         1250, 1500, 1800, 2500, 2700, 2850, 3100, 3300,
219 };
220
221 static int tps6586x_ldo0_voltages[] = {
222         1200, 1500, 1800, 2500, 2700, 2850, 3100, 3300,
223 };
224
225 static int tps6586x_ldo4_voltages[] = {
226         1700, 1725, 1750, 1775, 1800, 1825, 1850, 1875,
227         1900, 1925, 1950, 1975, 2000, 2025, 2050, 2075,
228         2100, 2125, 2150, 2175, 2200, 2225, 2250, 2275,
229         2300, 2325, 2350, 2375, 2400, 2425, 2450, 2475,
230 };
231
232 static int tps6586x_sm2_voltages[] = {
233         3000, 3050, 3100, 3150, 3200, 3250, 3300, 3350,
234         3400, 3450, 3500, 3550, 3600, 3650, 3700, 3750,
235         3800, 3850, 3900, 3950, 4000, 4050, 4100, 4150,
236         4200, 4250, 4300, 4350, 4400, 4450, 4500, 4550,
237 };
238
239 static int tps6586x_dvm_voltages[] = {
240          725,  750,  775,  800,  825,  850,  875,  900,
241          925,  950,  975, 1000, 1025, 1050, 1075, 1100,
242         1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300,
243         1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500,
244 };
245
246 #define TPS6586X_REGULATOR(_id, vdata, _ops, vreg, shift, nbits,        \
247                            ereg0, ebit0, ereg1, ebit1, en_time)         \
248         .desc   = {                                                     \
249                 .name   = "REG-" #_id,                                  \
250                 .ops    = &tps6586x_regulator_##_ops,                   \
251                 .type   = REGULATOR_VOLTAGE,                            \
252                 .id     = TPS6586X_ID_##_id,                            \
253                 .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages),  \
254                 .owner  = THIS_MODULE,                                  \
255         },                                                              \
256         .volt_reg       = TPS6586X_##vreg,                              \
257         .volt_shift     = (shift),                                      \
258         .volt_nbits     = (nbits),                                      \
259         .enable_reg[0]  = TPS6586X_SUPPLY##ereg0,                       \
260         .enable_bit[0]  = (ebit0),                                      \
261         .enable_reg[1]  = TPS6586X_SUPPLY##ereg1,                       \
262         .enable_bit[1]  = (ebit1),                                      \
263         .voltages       = tps6586x_##vdata##_voltages,                  \
264         .delay          = en_time,
265
266 #define TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit)                      \
267         .go_reg = TPS6586X_##goreg,                                     \
268         .go_bit = (gobit),
269
270 #define TPS6586X_LDO(_id, vdata, vreg, shift, nbits,                    \
271                      ereg0, ebit0, ereg1, ebit1, en_time)               \
272 {                                                                       \
273         TPS6586X_REGULATOR(_id, vdata, ldo_ops, vreg, shift, nbits,     \
274                            ereg0, ebit0, ereg1, ebit1, en_time)         \
275 }
276
277 #define TPS6586X_DVM(_id, vdata, vreg, shift, nbits,                    \
278                      ereg0, ebit0, ereg1, ebit1, goreg, gobit, en_time) \
279 {                                                                       \
280         TPS6586X_REGULATOR(_id, vdata, dvm_ops, vreg, shift, nbits,     \
281                            ereg0, ebit0, ereg1, ebit1, en_time)         \
282         TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit)                      \
283 }
284
285 static struct tps6586x_regulator tps6586x_regulator[] = {
286         TPS6586X_LDO(LDO_0, ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0, 4000),
287         TPS6586X_LDO(LDO_1, dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1, 4000),
288         TPS6586X_LDO(LDO_3, ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2, 3000),
289         TPS6586X_LDO(LDO_5, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6, 3000),
290         TPS6586X_LDO(LDO_6, ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4, 15000),
291         TPS6586X_LDO(LDO_7, ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5, 15000),
292         TPS6586X_LDO(LDO_8, ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6, 15000),
293         TPS6586X_LDO(LDO_9, ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7, 3000),
294         TPS6586X_LDO(LDO_RTC, ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7, 0),
295         TPS6586X_LDO(SM_2, sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7, 0),
296
297         TPS6586X_DVM(LDO_2, dvm, LDO2BV1, 0, 5, ENA, 3, ENB, 3, VCC2, 6, 3000),
298         TPS6586X_DVM(SM_0, dvm, SM0V1, 0, 5, ENA, 1, ENB, 1, VCC1, 2, 4000),
299         TPS6586X_DVM(SM_1, dvm, SM1V1, 0, 5, ENA, 0, ENB, 0, VCC1, 0, 4000),
300         TPS6586X_DVM(LDO_4, ldo4, LDO4V1, 0, 5, ENC, 3, END, 3, VCC1, 6, 15000),
301 };
302
303 /*
304  * TPS6586X has 2 enable bits that are OR'ed to determine the actual
305  * regulator state. Clearing one of this bits allows switching
306  * regulator on and of with single register write.
307  */
308 static inline int tps6586x_regulator_preinit(struct device *parent,
309                                              struct tps6586x_regulator *ri)
310 {
311         uint8_t val1, val2;
312         int ret;
313
314         if (ri->enable_reg[0] == ri->enable_reg[1] &&
315             ri->enable_bit[0] == ri->enable_bit[1])
316                         return 0;
317
318         ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
319         if (ret)
320                 return ret;
321
322         ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
323         if (ret)
324                 return ret;
325
326         if (!(val2 & (1 << ri->enable_bit[1])))
327                 return 0;
328
329         /*
330          * The regulator is on, but it's enabled with the bit we don't
331          * want to use, so we switch the enable bits
332          */
333         if (!(val1 & (1 << ri->enable_bit[0]))) {
334                 ret = tps6586x_set_bits(parent, ri->enable_reg[0],
335                                         1 << ri->enable_bit[0]);
336                 if (ret)
337                         return ret;
338         }
339
340         return tps6586x_clr_bits(parent, ri->enable_reg[1],
341                                  1 << ri->enable_bit[1]);
342 }
343
344 static inline int tps6586x_regulator_set_pwm_mode(struct platform_device *pdev)
345 {
346         struct device *parent = pdev->dev.parent;
347         struct regulator_init_data *p = pdev->dev.platform_data;
348         struct tps6586x_settings *setting = p->driver_data;
349         int ret = 0;
350         uint8_t mask;
351
352         if (setting == NULL)
353                 return 0;
354
355         switch (pdev->id) {
356         case TPS6586X_ID_SM_0:
357                 mask = 1 << SM0_PWM_BIT;
358                 break;
359         case TPS6586X_ID_SM_1:
360                 mask = 1 << SM1_PWM_BIT;
361                 break;
362         case TPS6586X_ID_SM_2:
363                 mask = 1 << SM2_PWM_BIT;
364                 break;
365         default:
366                 /* not all regulators have PWM/PFM option */
367                 return 0;
368         }
369
370         if (setting->sm_pwm_mode == PWM_ONLY)
371                 ret = tps6586x_set_bits(parent, TPS6586X_SMODE1, mask);
372         else if (setting->sm_pwm_mode == AUTO_PWM_PFM)
373                 ret = tps6586x_clr_bits(parent, TPS6586X_SMODE1, mask);
374
375         return ret;
376 }
377
378 static inline int tps6586x_regulator_set_slew_rate(struct platform_device *pdev)
379 {
380         struct device *parent = pdev->dev.parent;
381         struct regulator_init_data *p = pdev->dev.platform_data;
382         struct tps6586x_settings *setting = p->driver_data;
383         uint8_t reg;
384
385         if (setting == NULL)
386                 return 0;
387
388         /* only SM0 and SM1 can have the slew rate settings */
389         switch (pdev->id) {
390         case TPS6586X_ID_SM_0:
391                 reg = TPS6586X_SM0SL;
392                 break;
393         case TPS6586X_ID_SM_1:
394                 reg = TPS6586X_SM1SL;
395                 break;
396         default:
397                 return 0;
398         }
399         return tps6586x_write(parent, reg, setting->slew_rate);
400 }
401
402 static inline struct tps6586x_regulator *find_regulator_info(int id)
403 {
404         struct tps6586x_regulator *ri;
405         int i;
406
407         for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
408                 ri = &tps6586x_regulator[i];
409                 if (ri->desc.id == id)
410                         return ri;
411         }
412         return NULL;
413 }
414
415 static int __devinit tps6586x_regulator_probe(struct platform_device *pdev)
416 {
417         struct tps6586x_regulator *ri = NULL;
418         struct regulator_dev *rdev;
419         int id = pdev->id;
420         int err;
421
422         dev_dbg(&pdev->dev, "Probing reulator %d\n", id);
423
424         ri = find_regulator_info(id);
425         if (ri == NULL) {
426                 dev_err(&pdev->dev, "invalid regulator ID specified\n");
427                 return -EINVAL;
428         }
429
430         err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
431         if (err)
432                 return err;
433
434         rdev = regulator_register(&ri->desc, &pdev->dev,
435                                   pdev->dev.platform_data, ri);
436         if (IS_ERR(rdev)) {
437                 dev_err(&pdev->dev, "failed to register regulator %s\n",
438                                 ri->desc.name);
439                 return PTR_ERR(rdev);
440         }
441
442         platform_set_drvdata(pdev, rdev);
443
444         err = tps6586x_regulator_set_slew_rate(pdev);
445         if (err)
446                 return err;
447
448         return tps6586x_regulator_set_pwm_mode(pdev);
449 }
450
451 static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
452 {
453         struct regulator_dev *rdev = platform_get_drvdata(pdev);
454
455         regulator_unregister(rdev);
456         return 0;
457 }
458
459 static struct platform_driver tps6586x_regulator_driver = {
460         .driver = {
461                 .name   = "tps6586x-regulator",
462                 .owner  = THIS_MODULE,
463         },
464         .probe          = tps6586x_regulator_probe,
465         .remove         = __devexit_p(tps6586x_regulator_remove),
466 };
467
468 static int __init tps6586x_regulator_init(void)
469 {
470         return platform_driver_register(&tps6586x_regulator_driver);
471 }
472 subsys_initcall(tps6586x_regulator_init);
473
474 static void __exit tps6586x_regulator_exit(void)
475 {
476         platform_driver_unregister(&tps6586x_regulator_driver);
477 }
478 module_exit(tps6586x_regulator_exit);
479
480 MODULE_LICENSE("GPL");
481 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
482 MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
483 MODULE_ALIAS("platform:tps6586x-regulator");