regulator: tps65217: Use DIV_ROUND_UP macro to calculate selector
[linux-2.6.git] / drivers / regulator / tps65217-regulator.c
1 /*
2  * tps65217-regulator.c
3  *
4  * Regulator driver for TPS65217 PMIC
5  *
6  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation version 2.
11  *
12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
13  * kind, whether express or implied; without even the implied warranty
14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  */
17
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/device.h>
21 #include <linux/init.h>
22 #include <linux/err.h>
23 #include <linux/platform_device.h>
24
25 #include <linux/regulator/driver.h>
26 #include <linux/regulator/machine.h>
27 #include <linux/mfd/tps65217.h>
28
29 #define TPS65217_REGULATOR(_name, _id, _ops, _n)        \
30         {                                               \
31                 .name           = _name,                \
32                 .id             = _id,                  \
33                 .ops            = &_ops,                \
34                 .n_voltages     = _n,                   \
35                 .type           = REGULATOR_VOLTAGE,    \
36                 .owner          = THIS_MODULE,          \
37         }                                               \
38
39 #define TPS65217_INFO(_nm, _min, _max, _f1, _f2, _t, _n, _em, _vr, _vm) \
40         {                                               \
41                 .name           = _nm,                  \
42                 .min_uV         = _min,                 \
43                 .max_uV         = _max,                 \
44                 .vsel_to_uv     = _f1,                  \
45                 .uv_to_vsel     = _f2,                  \
46                 .table          = _t,                   \
47                 .table_len      = _n,                   \
48                 .enable_mask    = _em,                  \
49                 .set_vout_reg   = _vr,                  \
50                 .set_vout_mask  = _vm,                  \
51         }
52
53 static const int LDO1_VSEL_table[] = {
54         1000000, 1100000, 1200000, 1250000,
55         1300000, 1350000, 1400000, 1500000,
56         1600000, 1800000, 2500000, 2750000,
57         2800000, 3000000, 3100000, 3300000,
58 };
59
60 static int tps65217_vsel_to_uv1(unsigned int vsel)
61 {
62         int uV = 0;
63
64         if (vsel > 63)
65                 return -EINVAL;
66
67         if (vsel <= 24)
68                 uV = vsel * 25000 + 900000;
69         else if (vsel <= 52)
70                 uV = (vsel - 24) * 50000 + 1500000;
71         else if (vsel < 56)
72                 uV = (vsel - 52) * 100000 + 2900000;
73         else
74                 uV = 3300000;
75
76         return uV;
77 }
78
79 static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel)
80 {
81         if ((uV < 0) && (uV > 3300000))
82                 return -EINVAL;
83
84         if (uV <= 1500000)
85                 *vsel = DIV_ROUND_UP(uV - 900000, 25000);
86         else if (uV <= 2900000)
87                 *vsel = 24 + DIV_ROUND_UP(uV - 1500000, 50000);
88         else if (uV < 3300000)
89                 *vsel = 52 + DIV_ROUND_UP(uV - 2900000, 100000);
90         else
91                 *vsel = 56;
92
93         return 0;
94 }
95
96 static int tps65217_vsel_to_uv2(unsigned int vsel)
97 {
98         int uV = 0;
99
100         if (vsel > 31)
101                 return -EINVAL;
102
103         if (vsel <= 8)
104                 uV = vsel * 50000 + 1500000;
105         else if (vsel <= 13)
106                 uV = (vsel - 8) * 100000 + 1900000;
107         else
108                 uV = (vsel - 13) * 50000 + 2400000;
109
110         return uV;
111 }
112
113 static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel)
114 {
115         if ((uV < 0) && (uV > 3300000))
116                 return -EINVAL;
117
118         if (uV <= 1900000)
119                 *vsel = DIV_ROUND_UP(uV - 1500000, 50000);
120         else if (uV <= 2400000)
121                 *vsel = 8 + DIV_ROUND_UP(uV - 1900000, 100000);
122         else
123                 *vsel = 13 + DIV_ROUND_UP(uV - 2400000, 50000);
124
125         return 0;
126 }
127
128 static struct tps_info tps65217_pmic_regs[] = {
129         TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1,
130                         tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC1_EN,
131                         TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK),
132         TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1,
133                         tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC2_EN,
134                         TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK),
135         TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1,
136                         tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC3_EN,
137                         TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK),
138         TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL, LDO1_VSEL_table,
139                         16, TPS65217_ENABLE_LDO1_EN, TPS65217_REG_DEFLDO1,
140                         TPS65217_DEFLDO1_LDO1_MASK),
141         TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1,
142                         tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_LDO2_EN,
143                         TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK),
144         TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2,
145                         tps65217_uv_to_vsel2, NULL, 32,
146                         TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
147                         TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK),
148         TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2,
149                         tps65217_uv_to_vsel2, NULL, 32,
150                         TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
151                         TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK),
152 };
153
154 static int tps65217_pmic_dcdc_is_enabled(struct regulator_dev *dev)
155 {
156         int ret;
157         struct tps65217 *tps = rdev_get_drvdata(dev);
158         unsigned int data, dcdc = rdev_get_id(dev);
159
160         if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3)
161                 return -EINVAL;
162
163         ret = tps65217_reg_read(tps, TPS65217_REG_ENABLE, &data);
164         if (ret)
165                 return ret;
166
167         return (data & tps->info[dcdc]->enable_mask) ? 1 : 0;
168 }
169
170 static int tps65217_pmic_ldo_is_enabled(struct regulator_dev *dev)
171 {
172         int ret;
173         struct tps65217 *tps = rdev_get_drvdata(dev);
174         unsigned int data, ldo = rdev_get_id(dev);
175
176         if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4)
177                 return -EINVAL;
178
179         ret = tps65217_reg_read(tps, TPS65217_REG_ENABLE, &data);
180         if (ret)
181                 return ret;
182
183         return (data & tps->info[ldo]->enable_mask) ? 1 : 0;
184 }
185
186 static int tps65217_pmic_dcdc_enable(struct regulator_dev *dev)
187 {
188         struct tps65217 *tps = rdev_get_drvdata(dev);
189         unsigned int dcdc = rdev_get_id(dev);
190
191         if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3)
192                 return -EINVAL;
193
194         /* Enable the regulator and password protection is level 1 */
195         return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
196                                 tps->info[dcdc]->enable_mask,
197                                 tps->info[dcdc]->enable_mask,
198                                 TPS65217_PROTECT_L1);
199 }
200
201 static int tps65217_pmic_dcdc_disable(struct regulator_dev *dev)
202 {
203         struct tps65217 *tps = rdev_get_drvdata(dev);
204         unsigned int dcdc = rdev_get_id(dev);
205
206         if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3)
207                 return -EINVAL;
208
209         /* Disable the regulator and password protection is level 1 */
210         return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
211                         tps->info[dcdc]->enable_mask, TPS65217_PROTECT_L1);
212 }
213
214 static int tps65217_pmic_ldo_enable(struct regulator_dev *dev)
215 {
216         struct tps65217 *tps = rdev_get_drvdata(dev);
217         unsigned int ldo = rdev_get_id(dev);
218
219         if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4)
220                 return -EINVAL;
221
222         /* Enable the regulator and password protection is level 1 */
223         return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
224                                 tps->info[ldo]->enable_mask,
225                                 tps->info[ldo]->enable_mask,
226                                 TPS65217_PROTECT_L1);
227 }
228
229 static int tps65217_pmic_ldo_disable(struct regulator_dev *dev)
230 {
231         struct tps65217 *tps = rdev_get_drvdata(dev);
232         unsigned int ldo = rdev_get_id(dev);
233
234         if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4)
235                 return -EINVAL;
236
237         /* Disable the regulator and password protection is level 1 */
238         return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
239                         tps->info[ldo]->enable_mask, TPS65217_PROTECT_L1);
240 }
241
242 static int tps65217_pmic_dcdc_get_voltage_sel(struct regulator_dev *dev)
243 {
244         int ret;
245         struct tps65217 *tps = rdev_get_drvdata(dev);
246         unsigned int selector, dcdc = rdev_get_id(dev);
247
248         if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3)
249                 return -EINVAL;
250
251         ret = tps65217_reg_read(tps, tps->info[dcdc]->set_vout_reg, &selector);
252         if (ret)
253                 return ret;
254
255         selector &= tps->info[dcdc]->set_vout_mask;
256
257         return selector;
258 }
259
260 static int tps65217_pmic_dcdc_set_voltage(struct regulator_dev *dev,
261                                   int min_uV, int max_uV, unsigned *selector)
262 {
263         int ret;
264         struct tps65217 *tps = rdev_get_drvdata(dev);
265         unsigned int dcdc = rdev_get_id(dev);
266
267         if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3)
268                 return -EINVAL;
269
270         if (min_uV < tps->info[dcdc]->min_uV
271                 || min_uV > tps->info[dcdc]->max_uV)
272                 return -EINVAL;
273
274         if (max_uV < tps->info[dcdc]->min_uV
275                 || max_uV > tps->info[dcdc]->max_uV)
276                 return -EINVAL;
277
278         ret = tps->info[dcdc]->uv_to_vsel(min_uV, selector);
279         if (ret)
280                 return ret;
281
282         /* Set the voltage based on vsel value and write protect level is 2 */
283         ret = tps65217_set_bits(tps, tps->info[dcdc]->set_vout_reg,
284                                         tps->info[dcdc]->set_vout_mask,
285                                         *selector, TPS65217_PROTECT_L2);
286         if (ret)
287                 return ret;
288
289         /* Set GO bit to initiate voltage transistion */
290         return tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
291                                 TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
292                                 TPS65217_PROTECT_L2);
293 }
294
295 static int tps65217_pmic_ldo_get_voltage_sel(struct regulator_dev *dev)
296 {
297         int ret;
298         struct tps65217 *tps = rdev_get_drvdata(dev);
299         unsigned int selector, ldo = rdev_get_id(dev);
300
301         if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4)
302                 return -EINVAL;
303
304         ret = tps65217_reg_read(tps, tps->info[ldo]->set_vout_reg, &selector);
305         if (ret)
306                 return ret;
307
308         selector &= tps->info[ldo]->set_vout_mask;
309
310         return selector;
311 }
312
313 static int tps65217_pmic_ldo_set_voltage_sel(struct regulator_dev *dev,
314                                                 unsigned selector)
315 {
316         struct tps65217 *tps = rdev_get_drvdata(dev);
317         int ldo = rdev_get_id(dev);
318
319         if (ldo != TPS65217_LDO_1)
320                 return -EINVAL;
321
322         if (selector >= tps->info[ldo]->table_len)
323                 return -EINVAL;
324
325         /* Set the voltage based on vsel value and write protect level is 2 */
326         return tps65217_set_bits(tps, tps->info[ldo]->set_vout_reg,
327                                         tps->info[ldo]->set_vout_mask,
328                                         selector, TPS65217_PROTECT_L2);
329 }
330
331 static int tps65217_pmic_ldo_set_voltage(struct regulator_dev *dev,
332                                   int min_uV, int max_uV, unsigned *selector)
333 {
334         int ret;
335         struct tps65217 *tps = rdev_get_drvdata(dev);
336         unsigned int ldo = rdev_get_id(dev);
337
338         if (ldo < TPS65217_LDO_2 || ldo > TPS65217_LDO_4)
339                 return -EINVAL;
340
341         if (min_uV < tps->info[ldo]->min_uV
342                 || min_uV > tps->info[ldo]->max_uV)
343                 return -EINVAL;
344
345         if (max_uV < tps->info[ldo]->min_uV
346                 || max_uV > tps->info[ldo]->max_uV)
347                 return -EINVAL;
348
349         ret = tps->info[ldo]->uv_to_vsel(min_uV, selector);
350         if (ret)
351                 return ret;
352
353         /* Set the voltage based on vsel value and write protect level is 2 */
354         return tps65217_set_bits(tps, tps->info[ldo]->set_vout_reg,
355                                         tps->info[ldo]->set_vout_mask,
356                                         *selector, TPS65217_PROTECT_L2);
357 }
358
359 static int tps65217_pmic_dcdc_list_voltage(struct regulator_dev *dev,
360                                         unsigned selector)
361 {
362         struct tps65217 *tps = rdev_get_drvdata(dev);
363         unsigned int dcdc = rdev_get_id(dev);
364
365         if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3)
366                 return -EINVAL;
367
368         if (selector >= tps->info[dcdc]->table_len)
369                 return -EINVAL;
370
371         return tps->info[dcdc]->vsel_to_uv(selector);
372 }
373
374 static int tps65217_pmic_ldo_list_voltage(struct regulator_dev *dev,
375                                         unsigned selector)
376 {
377         struct tps65217 *tps = rdev_get_drvdata(dev);
378         unsigned int ldo = rdev_get_id(dev);
379
380         if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4)
381                 return -EINVAL;
382
383         if (selector >= tps->info[ldo]->table_len)
384                 return -EINVAL;
385
386         if (tps->info[ldo]->table)
387                 return tps->info[ldo]->table[selector];
388
389         return tps->info[ldo]->vsel_to_uv(selector);
390 }
391
392 /* Operations permitted on DCDCx */
393 static struct regulator_ops tps65217_pmic_dcdc_ops = {
394         .is_enabled             = tps65217_pmic_dcdc_is_enabled,
395         .enable                 = tps65217_pmic_dcdc_enable,
396         .disable                = tps65217_pmic_dcdc_disable,
397         .get_voltage_sel        = tps65217_pmic_dcdc_get_voltage_sel,
398         .set_voltage            = tps65217_pmic_dcdc_set_voltage,
399         .list_voltage           = tps65217_pmic_dcdc_list_voltage,
400 };
401
402 /* Operations permitted on LDO1 */
403 static struct regulator_ops tps65217_pmic_ldo1_ops = {
404         .is_enabled             = tps65217_pmic_ldo_is_enabled,
405         .enable                 = tps65217_pmic_ldo_enable,
406         .disable                = tps65217_pmic_ldo_disable,
407         .get_voltage_sel        = tps65217_pmic_ldo_get_voltage_sel,
408         .set_voltage_sel        = tps65217_pmic_ldo_set_voltage_sel,
409         .list_voltage           = tps65217_pmic_ldo_list_voltage,
410 };
411
412 /* Operations permitted on LDO2, LDO3 and LDO4 */
413 static struct regulator_ops tps65217_pmic_ldo234_ops = {
414         .is_enabled             = tps65217_pmic_ldo_is_enabled,
415         .enable                 = tps65217_pmic_ldo_enable,
416         .disable                = tps65217_pmic_ldo_disable,
417         .get_voltage_sel        = tps65217_pmic_ldo_get_voltage_sel,
418         .set_voltage            = tps65217_pmic_ldo_set_voltage,
419         .list_voltage           = tps65217_pmic_ldo_list_voltage,
420 };
421
422 static struct regulator_desc regulators[] = {
423         TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1,
424                                 tps65217_pmic_dcdc_ops, 64),
425         TPS65217_REGULATOR("DCDC2",TPS65217_DCDC_2,
426                                 tps65217_pmic_dcdc_ops, 64),
427         TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3,
428                                 tps65217_pmic_dcdc_ops, 64),
429         TPS65217_REGULATOR("LDO1", TPS65217_LDO_1,
430                                 tps65217_pmic_ldo1_ops, 16),
431         TPS65217_REGULATOR("LDO2", TPS65217_LDO_2,
432                                 tps65217_pmic_ldo234_ops, 64),
433         TPS65217_REGULATOR("LDO3", TPS65217_LDO_3,
434                                 tps65217_pmic_ldo234_ops, 32),
435         TPS65217_REGULATOR("LDO4", TPS65217_LDO_4,
436                                 tps65217_pmic_ldo234_ops, 32),
437 };
438
439 static int __devinit tps65217_regulator_probe(struct platform_device *pdev)
440 {
441         struct regulator_dev *rdev;
442         struct tps65217 *tps;
443         struct tps_info *info = &tps65217_pmic_regs[pdev->id];
444
445         /* Already set by core driver */
446         tps = dev_to_tps65217(pdev->dev.parent);
447         tps->info[pdev->id] = info;
448
449         rdev = regulator_register(&regulators[pdev->id], &pdev->dev,
450                                   pdev->dev.platform_data, tps, NULL);
451         if (IS_ERR(rdev))
452                 return PTR_ERR(rdev);
453
454         platform_set_drvdata(pdev, rdev);
455
456         return 0;
457 }
458
459 static int __devexit tps65217_regulator_remove(struct platform_device *pdev)
460 {
461         struct regulator_dev *rdev = platform_get_drvdata(pdev);
462
463         platform_set_drvdata(pdev, NULL);
464         regulator_unregister(rdev);
465
466         return 0;
467 }
468
469 static struct platform_driver tps65217_regulator_driver = {
470         .driver = {
471                 .name = "tps65217-pmic",
472         },
473         .probe = tps65217_regulator_probe,
474         .remove = __devexit_p(tps65217_regulator_remove),
475 };
476
477 static int __init tps65217_regulator_init(void)
478 {
479         return platform_driver_register(&tps65217_regulator_driver);
480 }
481 subsys_initcall(tps65217_regulator_init);
482
483 static void __exit tps65217_regulator_exit(void)
484 {
485         platform_driver_unregister(&tps65217_regulator_driver);
486 }
487 module_exit(tps65217_regulator_exit);
488
489
490 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
491 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
492 MODULE_ALIAS("platform:tps65217-pmic");
493 MODULE_LICENSE("GPL v2");