regulator: regulator for Palmas Kconfig
[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_is_enabled(struct regulator_dev *dev)
155 {
156         int ret;
157         struct tps65217 *tps = rdev_get_drvdata(dev);
158         unsigned int data, rid = rdev_get_id(dev);
159
160         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
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[rid]->enable_mask) ? 1 : 0;
168 }
169
170 static int tps65217_pmic_enable(struct regulator_dev *dev)
171 {
172         struct tps65217 *tps = rdev_get_drvdata(dev);
173         unsigned int rid = rdev_get_id(dev);
174
175         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
176                 return -EINVAL;
177
178         /* Enable the regulator and password protection is level 1 */
179         return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
180                                 tps->info[rid]->enable_mask,
181                                 tps->info[rid]->enable_mask,
182                                 TPS65217_PROTECT_L1);
183 }
184
185 static int tps65217_pmic_disable(struct regulator_dev *dev)
186 {
187         struct tps65217 *tps = rdev_get_drvdata(dev);
188         unsigned int rid = rdev_get_id(dev);
189
190         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
191                 return -EINVAL;
192
193         /* Disable the regulator and password protection is level 1 */
194         return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
195                         tps->info[rid]->enable_mask, TPS65217_PROTECT_L1);
196 }
197
198 static int tps65217_pmic_get_voltage_sel(struct regulator_dev *dev)
199 {
200         int ret;
201         struct tps65217 *tps = rdev_get_drvdata(dev);
202         unsigned int selector, rid = rdev_get_id(dev);
203
204         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
205                 return -EINVAL;
206
207         ret = tps65217_reg_read(tps, tps->info[rid]->set_vout_reg, &selector);
208         if (ret)
209                 return ret;
210
211         selector &= tps->info[rid]->set_vout_mask;
212
213         return selector;
214 }
215
216 static int tps65217_pmic_ldo1_set_voltage_sel(struct regulator_dev *dev,
217                                                 unsigned selector)
218 {
219         struct tps65217 *tps = rdev_get_drvdata(dev);
220         int ldo = rdev_get_id(dev);
221
222         if (ldo != TPS65217_LDO_1)
223                 return -EINVAL;
224
225         if (selector >= tps->info[ldo]->table_len)
226                 return -EINVAL;
227
228         /* Set the voltage based on vsel value and write protect level is 2 */
229         return tps65217_set_bits(tps, tps->info[ldo]->set_vout_reg,
230                                         tps->info[ldo]->set_vout_mask,
231                                         selector, TPS65217_PROTECT_L2);
232 }
233
234 static int tps65217_pmic_set_voltage(struct regulator_dev *dev,
235                                   int min_uV, int max_uV, unsigned *selector)
236 {
237         int ret;
238         struct tps65217 *tps = rdev_get_drvdata(dev);
239         unsigned int rid = rdev_get_id(dev);
240
241         /* LDO1 implements set_voltage_sel callback */
242         if (rid == TPS65217_LDO_1)
243                 return -EINVAL;
244
245         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
246                 return -EINVAL;
247
248         if (min_uV < tps->info[rid]->min_uV
249                 || min_uV > tps->info[rid]->max_uV)
250                 return -EINVAL;
251
252         if (max_uV < tps->info[rid]->min_uV
253                 || max_uV > tps->info[rid]->max_uV)
254                 return -EINVAL;
255
256         ret = tps->info[rid]->uv_to_vsel(min_uV, selector);
257         if (ret)
258                 return ret;
259
260         /* Set the voltage based on vsel value and write protect level is 2 */
261         ret = tps65217_set_bits(tps, tps->info[rid]->set_vout_reg,
262                                 tps->info[rid]->set_vout_mask,
263                                 *selector, TPS65217_PROTECT_L2);
264
265         /* Set GO bit for DCDCx to initiate voltage transistion */
266         switch (rid) {
267         case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
268                 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
269                                        TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
270                                        TPS65217_PROTECT_L2);
271                 break;
272         }
273
274         return ret;
275 }
276
277 static int tps65217_pmic_list_voltage(struct regulator_dev *dev,
278                                         unsigned selector)
279 {
280         struct tps65217 *tps = rdev_get_drvdata(dev);
281         unsigned int rid = rdev_get_id(dev);
282
283         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
284                 return -EINVAL;
285
286         if (selector >= tps->info[rid]->table_len)
287                 return -EINVAL;
288
289         if (tps->info[rid]->table)
290                 return tps->info[rid]->table[selector];
291
292         return tps->info[rid]->vsel_to_uv(selector);
293 }
294
295 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
296 static struct regulator_ops tps65217_pmic_ops = {
297         .is_enabled             = tps65217_pmic_is_enabled,
298         .enable                 = tps65217_pmic_enable,
299         .disable                = tps65217_pmic_disable,
300         .get_voltage_sel        = tps65217_pmic_get_voltage_sel,
301         .set_voltage            = tps65217_pmic_set_voltage,
302         .list_voltage           = tps65217_pmic_list_voltage,
303 };
304
305 /* Operations permitted on LDO1 */
306 static struct regulator_ops tps65217_pmic_ldo1_ops = {
307         .is_enabled             = tps65217_pmic_is_enabled,
308         .enable                 = tps65217_pmic_enable,
309         .disable                = tps65217_pmic_disable,
310         .get_voltage_sel        = tps65217_pmic_get_voltage_sel,
311         .set_voltage_sel        = tps65217_pmic_ldo1_set_voltage_sel,
312         .list_voltage           = tps65217_pmic_list_voltage,
313 };
314
315 static struct regulator_desc regulators[] = {
316         TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64),
317         TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64),
318         TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64),
319         TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16),
320         TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64),
321         TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32),
322         TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32),
323 };
324
325 static int __devinit tps65217_regulator_probe(struct platform_device *pdev)
326 {
327         struct regulator_dev *rdev;
328         struct tps65217 *tps;
329         struct tps_info *info = &tps65217_pmic_regs[pdev->id];
330
331         /* Already set by core driver */
332         tps = dev_to_tps65217(pdev->dev.parent);
333         tps->info[pdev->id] = info;
334
335         rdev = regulator_register(&regulators[pdev->id], &pdev->dev,
336                                   pdev->dev.platform_data, tps, NULL);
337         if (IS_ERR(rdev))
338                 return PTR_ERR(rdev);
339
340         platform_set_drvdata(pdev, rdev);
341
342         return 0;
343 }
344
345 static int __devexit tps65217_regulator_remove(struct platform_device *pdev)
346 {
347         struct regulator_dev *rdev = platform_get_drvdata(pdev);
348
349         platform_set_drvdata(pdev, NULL);
350         regulator_unregister(rdev);
351
352         return 0;
353 }
354
355 static struct platform_driver tps65217_regulator_driver = {
356         .driver = {
357                 .name = "tps65217-pmic",
358         },
359         .probe = tps65217_regulator_probe,
360         .remove = __devexit_p(tps65217_regulator_remove),
361 };
362
363 static int __init tps65217_regulator_init(void)
364 {
365         return platform_driver_register(&tps65217_regulator_driver);
366 }
367 subsys_initcall(tps65217_regulator_init);
368
369 static void __exit tps65217_regulator_exit(void)
370 {
371         platform_driver_unregister(&tps65217_regulator_driver);
372 }
373 module_exit(tps65217_regulator_exit);
374
375 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
376 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
377 MODULE_ALIAS("platform:tps65217-pmic");
378 MODULE_LICENSE("GPL v2");