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Linux/drivers/regulator/pfuze100-regulator.c

  1 /*
  2  * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
  3  *
  4  * This program is free software; you can redistribute it and/or modify
  5  * it under the terms of the GNU General Public License as published by
  6  * the Free Software Foundation; either version 2 of the License, or
  7  * (at your option) any later version.
  8  *
  9  * This program is distributed in the hope that it will be useful,
 10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12  * GNU General Public License for more details.
 13  *
 14  * You should have received a copy of the GNU General Public License
 15  * along with this program; if not, write to the Free Software
 16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 17  */
 18 #include <linux/kernel.h>
 19 #include <linux/module.h>
 20 #include <linux/init.h>
 21 #include <linux/err.h>
 22 #include <linux/of.h>
 23 #include <linux/of_device.h>
 24 #include <linux/regulator/of_regulator.h>
 25 #include <linux/platform_device.h>
 26 #include <linux/regulator/driver.h>
 27 #include <linux/regulator/machine.h>
 28 #include <linux/regulator/pfuze100.h>
 29 #include <linux/i2c.h>
 30 #include <linux/slab.h>
 31 #include <linux/regmap.h>
 32 
 33 #define PFUZE_NUMREGS           128
 34 #define PFUZE100_VOL_OFFSET     0
 35 #define PFUZE100_STANDBY_OFFSET 1
 36 #define PFUZE100_MODE_OFFSET    3
 37 #define PFUZE100_CONF_OFFSET    4
 38 
 39 #define PFUZE100_DEVICEID       0x0
 40 #define PFUZE100_REVID          0x3
 41 #define PFUZE100_FABID          0x4
 42 
 43 #define PFUZE100_SW1ABVOL       0x20
 44 #define PFUZE100_SW1CVOL        0x2e
 45 #define PFUZE100_SW2VOL         0x35
 46 #define PFUZE100_SW3AVOL        0x3c
 47 #define PFUZE100_SW3BVOL        0x43
 48 #define PFUZE100_SW4VOL         0x4a
 49 #define PFUZE100_SWBSTCON1      0x66
 50 #define PFUZE100_VREFDDRCON     0x6a
 51 #define PFUZE100_VSNVSVOL       0x6b
 52 #define PFUZE100_VGEN1VOL       0x6c
 53 #define PFUZE100_VGEN2VOL       0x6d
 54 #define PFUZE100_VGEN3VOL       0x6e
 55 #define PFUZE100_VGEN4VOL       0x6f
 56 #define PFUZE100_VGEN5VOL       0x70
 57 #define PFUZE100_VGEN6VOL       0x71
 58 
 59 enum chips { PFUZE100, PFUZE200 };
 60 
 61 struct pfuze_regulator {
 62         struct regulator_desc desc;
 63         unsigned char stby_reg;
 64         unsigned char stby_mask;
 65 };
 66 
 67 struct pfuze_chip {
 68         int     chip_id;
 69         struct regmap *regmap;
 70         struct device *dev;
 71         struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
 72         struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
 73 };
 74 
 75 static const int pfuze100_swbst[] = {
 76         5000000, 5050000, 5100000, 5150000,
 77 };
 78 
 79 static const int pfuze100_vsnvs[] = {
 80         1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
 81 };
 82 
 83 static const struct i2c_device_id pfuze_device_id[] = {
 84         {.name = "pfuze100", .driver_data = PFUZE100},
 85         {.name = "pfuze200", .driver_data = PFUZE200},
 86         { }
 87 };
 88 MODULE_DEVICE_TABLE(i2c, pfuze_device_id);
 89 
 90 static const struct of_device_id pfuze_dt_ids[] = {
 91         { .compatible = "fsl,pfuze100", .data = (void *)PFUZE100},
 92         { .compatible = "fsl,pfuze200", .data = (void *)PFUZE200},
 93         { }
 94 };
 95 MODULE_DEVICE_TABLE(of, pfuze_dt_ids);
 96 
 97 static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 98 {
 99         struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
100         int id = rdev_get_id(rdev);
101         unsigned int ramp_bits;
102         int ret;
103 
104         if (id < PFUZE100_SWBST) {
105                 ramp_delay = 12500 / ramp_delay;
106                 ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
107                 ret = regmap_update_bits(pfuze100->regmap,
108                                          rdev->desc->vsel_reg + 4,
109                                          0xc0, ramp_bits << 6);
110                 if (ret < 0)
111                         dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
112         } else
113                 ret = -EACCES;
114 
115         return ret;
116 }
117 
118 static struct regulator_ops pfuze100_ldo_regulator_ops = {
119         .enable = regulator_enable_regmap,
120         .disable = regulator_disable_regmap,
121         .is_enabled = regulator_is_enabled_regmap,
122         .list_voltage = regulator_list_voltage_linear,
123         .set_voltage_sel = regulator_set_voltage_sel_regmap,
124         .get_voltage_sel = regulator_get_voltage_sel_regmap,
125 };
126 
127 static struct regulator_ops pfuze100_fixed_regulator_ops = {
128         .list_voltage = regulator_list_voltage_linear,
129 };
130 
131 static struct regulator_ops pfuze100_sw_regulator_ops = {
132         .list_voltage = regulator_list_voltage_linear,
133         .set_voltage_sel = regulator_set_voltage_sel_regmap,
134         .get_voltage_sel = regulator_get_voltage_sel_regmap,
135         .set_voltage_time_sel = regulator_set_voltage_time_sel,
136         .set_ramp_delay = pfuze100_set_ramp_delay,
137 };
138 
139 static struct regulator_ops pfuze100_swb_regulator_ops = {
140         .list_voltage = regulator_list_voltage_table,
141         .map_voltage = regulator_map_voltage_ascend,
142         .set_voltage_sel = regulator_set_voltage_sel_regmap,
143         .get_voltage_sel = regulator_get_voltage_sel_regmap,
144 
145 };
146 
147 #define PFUZE100_FIXED_REG(_chip, _name, base, voltage) \
148         [_chip ## _ ## _name] = {       \
149                 .desc = {       \
150                         .name = #_name, \
151                         .n_voltages = 1,        \
152                         .ops = &pfuze100_fixed_regulator_ops,   \
153                         .type = REGULATOR_VOLTAGE,      \
154                         .id = _chip ## _ ## _name,      \
155                         .owner = THIS_MODULE,   \
156                         .min_uV = (voltage),    \
157                         .enable_reg = (base),   \
158                         .enable_mask = 0x10,    \
159                 },      \
160         }
161 
162 #define PFUZE100_SW_REG(_chip, _name, base, min, max, step)     \
163         [_chip ## _ ## _name] = {       \
164                 .desc = {       \
165                         .name = #_name,\
166                         .n_voltages = ((max) - (min)) / (step) + 1,     \
167                         .ops = &pfuze100_sw_regulator_ops,      \
168                         .type = REGULATOR_VOLTAGE,      \
169                         .id = _chip ## _ ## _name,      \
170                         .owner = THIS_MODULE,   \
171                         .min_uV = (min),        \
172                         .uV_step = (step),      \
173                         .vsel_reg = (base) + PFUZE100_VOL_OFFSET,       \
174                         .vsel_mask = 0x3f,      \
175                 },      \
176                 .stby_reg = (base) + PFUZE100_STANDBY_OFFSET,   \
177                 .stby_mask = 0x3f,      \
178         }
179 
180 #define PFUZE100_SWB_REG(_chip, _name, base, mask, voltages)    \
181         [_chip ## _ ##  _name] = {      \
182                 .desc = {       \
183                         .name = #_name, \
184                         .n_voltages = ARRAY_SIZE(voltages),     \
185                         .ops = &pfuze100_swb_regulator_ops,     \
186                         .type = REGULATOR_VOLTAGE,      \
187                         .id = _chip ## _ ## _name,      \
188                         .owner = THIS_MODULE,   \
189                         .volt_table = voltages, \
190                         .vsel_reg = (base),     \
191                         .vsel_mask = (mask),    \
192                 },      \
193         }
194 
195 #define PFUZE100_VGEN_REG(_chip, _name, base, min, max, step)   \
196         [_chip ## _ ## _name] = {       \
197                 .desc = {       \
198                         .name = #_name, \
199                         .n_voltages = ((max) - (min)) / (step) + 1,     \
200                         .ops = &pfuze100_ldo_regulator_ops,     \
201                         .type = REGULATOR_VOLTAGE,      \
202                         .id = _chip ## _ ## _name,      \
203                         .owner = THIS_MODULE,   \
204                         .min_uV = (min),        \
205                         .uV_step = (step),      \
206                         .vsel_reg = (base),     \
207                         .vsel_mask = 0xf,       \
208                         .enable_reg = (base),   \
209                         .enable_mask = 0x10,    \
210                 },      \
211                 .stby_reg = (base),     \
212                 .stby_mask = 0x20,      \
213         }
214 
215 /* PFUZE100 */
216 static struct pfuze_regulator pfuze100_regulators[] = {
217         PFUZE100_SW_REG(PFUZE100, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
218         PFUZE100_SW_REG(PFUZE100, SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
219         PFUZE100_SW_REG(PFUZE100, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
220         PFUZE100_SW_REG(PFUZE100, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
221         PFUZE100_SW_REG(PFUZE100, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
222         PFUZE100_SW_REG(PFUZE100, SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
223         PFUZE100_SWB_REG(PFUZE100, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
224         PFUZE100_SWB_REG(PFUZE100, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
225         PFUZE100_FIXED_REG(PFUZE100, VREFDDR, PFUZE100_VREFDDRCON, 750000),
226         PFUZE100_VGEN_REG(PFUZE100, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
227         PFUZE100_VGEN_REG(PFUZE100, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
228         PFUZE100_VGEN_REG(PFUZE100, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
229         PFUZE100_VGEN_REG(PFUZE100, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
230         PFUZE100_VGEN_REG(PFUZE100, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
231         PFUZE100_VGEN_REG(PFUZE100, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
232 };
233 
234 static struct pfuze_regulator pfuze200_regulators[] = {
235         PFUZE100_SW_REG(PFUZE200, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
236         PFUZE100_SW_REG(PFUZE200, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
237         PFUZE100_SW_REG(PFUZE200, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
238         PFUZE100_SW_REG(PFUZE200, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
239         PFUZE100_SWB_REG(PFUZE200, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
240         PFUZE100_SWB_REG(PFUZE200, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
241         PFUZE100_FIXED_REG(PFUZE200, VREFDDR, PFUZE100_VREFDDRCON, 750000),
242         PFUZE100_VGEN_REG(PFUZE200, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
243         PFUZE100_VGEN_REG(PFUZE200, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
244         PFUZE100_VGEN_REG(PFUZE200, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
245         PFUZE100_VGEN_REG(PFUZE200, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
246         PFUZE100_VGEN_REG(PFUZE200, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
247         PFUZE100_VGEN_REG(PFUZE200, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
248 };
249 
250 static struct pfuze_regulator *pfuze_regulators;
251 
252 #ifdef CONFIG_OF
253 /* PFUZE100 */
254 static struct of_regulator_match pfuze100_matches[] = {
255         { .name = "sw1ab",      },
256         { .name = "sw1c",       },
257         { .name = "sw2",        },
258         { .name = "sw3a",       },
259         { .name = "sw3b",       },
260         { .name = "sw4",        },
261         { .name = "swbst",      },
262         { .name = "vsnvs",      },
263         { .name = "vrefddr",    },
264         { .name = "vgen1",      },
265         { .name = "vgen2",      },
266         { .name = "vgen3",      },
267         { .name = "vgen4",      },
268         { .name = "vgen5",      },
269         { .name = "vgen6",      },
270 };
271 
272 /* PFUZE200 */
273 static struct of_regulator_match pfuze200_matches[] = {
274 
275         { .name = "sw1ab",      },
276         { .name = "sw2",        },
277         { .name = "sw3a",       },
278         { .name = "sw3b",       },
279         { .name = "swbst",      },
280         { .name = "vsnvs",      },
281         { .name = "vrefddr",    },
282         { .name = "vgen1",      },
283         { .name = "vgen2",      },
284         { .name = "vgen3",      },
285         { .name = "vgen4",      },
286         { .name = "vgen5",      },
287         { .name = "vgen6",      },
288 };
289 
290 static struct of_regulator_match *pfuze_matches;
291 
292 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
293 {
294         struct device *dev = chip->dev;
295         struct device_node *np, *parent;
296         int ret;
297 
298         np = of_node_get(dev->of_node);
299         if (!np)
300                 return -EINVAL;
301 
302         parent = of_get_child_by_name(np, "regulators");
303         if (!parent) {
304                 dev_err(dev, "regulators node not found\n");
305                 return -EINVAL;
306         }
307 
308         switch (chip->chip_id) {
309         case PFUZE200:
310                 pfuze_matches = pfuze200_matches;
311                 ret = of_regulator_match(dev, parent, pfuze200_matches,
312                                          ARRAY_SIZE(pfuze200_matches));
313                 break;
314 
315         case PFUZE100:
316         default:
317                 pfuze_matches = pfuze100_matches;
318                 ret = of_regulator_match(dev, parent, pfuze100_matches,
319                                          ARRAY_SIZE(pfuze100_matches));
320                 break;
321         }
322 
323         of_node_put(parent);
324         if (ret < 0) {
325                 dev_err(dev, "Error parsing regulator init data: %d\n",
326                         ret);
327                 return ret;
328         }
329 
330         return 0;
331 }
332 
333 static inline struct regulator_init_data *match_init_data(int index)
334 {
335         return pfuze_matches[index].init_data;
336 }
337 
338 static inline struct device_node *match_of_node(int index)
339 {
340         return pfuze_matches[index].of_node;
341 }
342 #else
343 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
344 {
345         return 0;
346 }
347 
348 static inline struct regulator_init_data *match_init_data(int index)
349 {
350         return NULL;
351 }
352 
353 static inline struct device_node *match_of_node(int index)
354 {
355         return NULL;
356 }
357 #endif
358 
359 static int pfuze_identify(struct pfuze_chip *pfuze_chip)
360 {
361         unsigned int value;
362         int ret;
363 
364         ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
365         if (ret)
366                 return ret;
367 
368         if (((value & 0x0f) == 0x8) && (pfuze_chip->chip_id == PFUZE100)) {
369                 /*
370                  * Freescale misprogrammed 1-3% of parts prior to week 8 of 2013
371                  * as ID=8 in PFUZE100
372                  */
373                 dev_info(pfuze_chip->dev, "Assuming misprogrammed ID=0x8");
374         } else if ((value & 0x0f) != pfuze_chip->chip_id) {
375                 /* device id NOT match with your setting */
376                 dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
377                 return -ENODEV;
378         }
379 
380         ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
381         if (ret)
382                 return ret;
383         dev_info(pfuze_chip->dev,
384                  "Full layer: %x, Metal layer: %x\n",
385                  (value & 0xf0) >> 4, value & 0x0f);
386 
387         ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
388         if (ret)
389                 return ret;
390         dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
391                  (value & 0xc) >> 2, value & 0x3);
392 
393         return 0;
394 }
395 
396 static const struct regmap_config pfuze_regmap_config = {
397         .reg_bits = 8,
398         .val_bits = 8,
399         .max_register = PFUZE_NUMREGS - 1,
400         .cache_type = REGCACHE_RBTREE,
401 };
402 
403 static int pfuze100_regulator_probe(struct i2c_client *client,
404                                     const struct i2c_device_id *id)
405 {
406         struct pfuze_chip *pfuze_chip;
407         struct pfuze_regulator_platform_data *pdata =
408             dev_get_platdata(&client->dev);
409         struct regulator_config config = { };
410         int i, ret;
411         const struct of_device_id *match;
412         u32 regulator_num;
413         u32 sw_check_start, sw_check_end;
414 
415         pfuze_chip = devm_kzalloc(&client->dev, sizeof(*pfuze_chip),
416                         GFP_KERNEL);
417         if (!pfuze_chip)
418                 return -ENOMEM;
419 
420         if (client->dev.of_node) {
421                 match = of_match_device(of_match_ptr(pfuze_dt_ids),
422                                 &client->dev);
423                 if (!match) {
424                         dev_err(&client->dev, "Error: No device match found\n");
425                         return -ENODEV;
426                 }
427                 pfuze_chip->chip_id = (int)(long)match->data;
428         } else if (id) {
429                 pfuze_chip->chip_id = id->driver_data;
430         } else {
431                 dev_err(&client->dev, "No dts match or id table match found\n");
432                 return -ENODEV;
433         }
434 
435         i2c_set_clientdata(client, pfuze_chip);
436         pfuze_chip->dev = &client->dev;
437 
438         pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
439         if (IS_ERR(pfuze_chip->regmap)) {
440                 ret = PTR_ERR(pfuze_chip->regmap);
441                 dev_err(&client->dev,
442                         "regmap allocation failed with err %d\n", ret);
443                 return ret;
444         }
445 
446         ret = pfuze_identify(pfuze_chip);
447         if (ret) {
448                 dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
449                 return ret;
450         }
451 
452         /* use the right regulators after identify the right device */
453         switch (pfuze_chip->chip_id) {
454         case PFUZE200:
455                 pfuze_regulators = pfuze200_regulators;
456                 regulator_num = ARRAY_SIZE(pfuze200_regulators);
457                 sw_check_start = PFUZE200_SW2;
458                 sw_check_end = PFUZE200_SW3B;
459                 break;
460 
461         case PFUZE100:
462         default:
463                 pfuze_regulators = pfuze100_regulators;
464                 regulator_num = ARRAY_SIZE(pfuze100_regulators);
465                 sw_check_start = PFUZE100_SW2;
466                 sw_check_end = PFUZE100_SW4;
467                 break;
468         }
469         dev_info(&client->dev, "pfuze%s found.\n",
470                 (pfuze_chip->chip_id == PFUZE100) ? "100" : "200");
471 
472         memcpy(pfuze_chip->regulator_descs, pfuze_regulators,
473                 sizeof(pfuze_chip->regulator_descs));
474 
475         ret = pfuze_parse_regulators_dt(pfuze_chip);
476         if (ret)
477                 return ret;
478 
479         for (i = 0; i < regulator_num; i++) {
480                 struct regulator_init_data *init_data;
481                 struct regulator_desc *desc;
482                 int val;
483 
484                 desc = &pfuze_chip->regulator_descs[i].desc;
485 
486                 if (pdata)
487                         init_data = pdata->init_data[i];
488                 else
489                         init_data = match_init_data(i);
490 
491                 /* SW2~SW4 high bit check and modify the voltage value table */
492                 if (i >= sw_check_start && i <= sw_check_end) {
493                         regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
494                         if (val & 0x40) {
495                                 desc->min_uV = 800000;
496                                 desc->uV_step = 50000;
497                                 desc->n_voltages = 51;
498                         }
499                 }
500 
501                 config.dev = &client->dev;
502                 config.init_data = init_data;
503                 config.driver_data = pfuze_chip;
504                 config.of_node = match_of_node(i);
505 
506                 pfuze_chip->regulators[i] =
507                         devm_regulator_register(&client->dev, desc, &config);
508                 if (IS_ERR(pfuze_chip->regulators[i])) {
509                         dev_err(&client->dev, "register regulator%s failed\n",
510                                 pfuze_regulators[i].desc.name);
511                         return PTR_ERR(pfuze_chip->regulators[i]);
512                 }
513         }
514 
515         return 0;
516 }
517 
518 static struct i2c_driver pfuze_driver = {
519         .id_table = pfuze_device_id,
520         .driver = {
521                 .name = "pfuze100-regulator",
522                 .owner = THIS_MODULE,
523                 .of_match_table = pfuze_dt_ids,
524         },
525         .probe = pfuze100_regulator_probe,
526 };
527 module_i2c_driver(pfuze_driver);
528 
529 MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
530 MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100/PFUZE200 PMIC");
531 MODULE_LICENSE("GPL v2");
532 MODULE_ALIAS("i2c:pfuze100-regulator");
533 

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