Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
palmas-regulator.c
Go to the documentation of this file.
1 /*
2  * Driver for Regulator part of Palmas PMIC Chips
3  *
4  * Copyright 2011-2012 Texas Instruments Inc.
5  *
6  * Author: Graeme Gregory <[email protected]>
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of the GNU General Public License as published by the
10  * Free Software Foundation; either version 2 of the License, or (at your
11  * option) any later version.
12  *
13  */
14 
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/err.h>
19 #include <linux/platform_device.h>
20 #include <linux/regulator/driver.h>
21 #include <linux/regulator/machine.h>
22 #include <linux/slab.h>
23 #include <linux/regmap.h>
24 #include <linux/mfd/palmas.h>
25 #include <linux/of.h>
26 #include <linux/of_platform.h>
27 #include <linux/regulator/of_regulator.h>
28 
29 struct regs_info {
30  char *name;
31  u8 vsel_addr;
32  u8 ctrl_addr;
33  u8 tstep_addr;
34 };
35 
36 static const struct regs_info palmas_regs_info[] = {
37  {
38  .name = "SMPS12",
39  .vsel_addr = PALMAS_SMPS12_VOLTAGE,
40  .ctrl_addr = PALMAS_SMPS12_CTRL,
41  .tstep_addr = PALMAS_SMPS12_TSTEP,
42  },
43  {
44  .name = "SMPS123",
45  .vsel_addr = PALMAS_SMPS12_VOLTAGE,
46  .ctrl_addr = PALMAS_SMPS12_CTRL,
47  .tstep_addr = PALMAS_SMPS12_TSTEP,
48  },
49  {
50  .name = "SMPS3",
51  .vsel_addr = PALMAS_SMPS3_VOLTAGE,
52  .ctrl_addr = PALMAS_SMPS3_CTRL,
53  },
54  {
55  .name = "SMPS45",
56  .vsel_addr = PALMAS_SMPS45_VOLTAGE,
57  .ctrl_addr = PALMAS_SMPS45_CTRL,
58  .tstep_addr = PALMAS_SMPS45_TSTEP,
59  },
60  {
61  .name = "SMPS457",
62  .vsel_addr = PALMAS_SMPS45_VOLTAGE,
63  .ctrl_addr = PALMAS_SMPS45_CTRL,
64  .tstep_addr = PALMAS_SMPS45_TSTEP,
65  },
66  {
67  .name = "SMPS6",
68  .vsel_addr = PALMAS_SMPS6_VOLTAGE,
69  .ctrl_addr = PALMAS_SMPS6_CTRL,
70  .tstep_addr = PALMAS_SMPS6_TSTEP,
71  },
72  {
73  .name = "SMPS7",
74  .vsel_addr = PALMAS_SMPS7_VOLTAGE,
75  .ctrl_addr = PALMAS_SMPS7_CTRL,
76  },
77  {
78  .name = "SMPS8",
79  .vsel_addr = PALMAS_SMPS8_VOLTAGE,
80  .ctrl_addr = PALMAS_SMPS8_CTRL,
81  .tstep_addr = PALMAS_SMPS8_TSTEP,
82  },
83  {
84  .name = "SMPS9",
85  .vsel_addr = PALMAS_SMPS9_VOLTAGE,
86  .ctrl_addr = PALMAS_SMPS9_CTRL,
87  },
88  {
89  .name = "SMPS10",
90  },
91  {
92  .name = "LDO1",
93  .vsel_addr = PALMAS_LDO1_VOLTAGE,
94  .ctrl_addr = PALMAS_LDO1_CTRL,
95  },
96  {
97  .name = "LDO2",
98  .vsel_addr = PALMAS_LDO2_VOLTAGE,
99  .ctrl_addr = PALMAS_LDO2_CTRL,
100  },
101  {
102  .name = "LDO3",
103  .vsel_addr = PALMAS_LDO3_VOLTAGE,
104  .ctrl_addr = PALMAS_LDO3_CTRL,
105  },
106  {
107  .name = "LDO4",
108  .vsel_addr = PALMAS_LDO4_VOLTAGE,
109  .ctrl_addr = PALMAS_LDO4_CTRL,
110  },
111  {
112  .name = "LDO5",
113  .vsel_addr = PALMAS_LDO5_VOLTAGE,
114  .ctrl_addr = PALMAS_LDO5_CTRL,
115  },
116  {
117  .name = "LDO6",
118  .vsel_addr = PALMAS_LDO6_VOLTAGE,
119  .ctrl_addr = PALMAS_LDO6_CTRL,
120  },
121  {
122  .name = "LDO7",
123  .vsel_addr = PALMAS_LDO7_VOLTAGE,
124  .ctrl_addr = PALMAS_LDO7_CTRL,
125  },
126  {
127  .name = "LDO8",
128  .vsel_addr = PALMAS_LDO8_VOLTAGE,
129  .ctrl_addr = PALMAS_LDO8_CTRL,
130  },
131  {
132  .name = "LDO9",
133  .vsel_addr = PALMAS_LDO9_VOLTAGE,
134  .ctrl_addr = PALMAS_LDO9_CTRL,
135  },
136  {
137  .name = "LDOLN",
138  .vsel_addr = PALMAS_LDOLN_VOLTAGE,
139  .ctrl_addr = PALMAS_LDOLN_CTRL,
140  },
141  {
142  .name = "LDOUSB",
143  .vsel_addr = PALMAS_LDOUSB_VOLTAGE,
144  .ctrl_addr = PALMAS_LDOUSB_CTRL,
145  },
146 };
147 
148 #define SMPS_CTRL_MODE_OFF 0x00
149 #define SMPS_CTRL_MODE_ON 0x01
150 #define SMPS_CTRL_MODE_ECO 0x02
151 #define SMPS_CTRL_MODE_PWM 0x03
152 
153 /* These values are derived from the data sheet. And are the number of steps
154  * where there is a voltage change, the ranges at beginning and end of register
155  * max/min values where there are no change are ommitted.
156  *
157  * So they are basically (maxV-minV)/stepV
158  */
159 #define PALMAS_SMPS_NUM_VOLTAGES 116
160 #define PALMAS_SMPS10_NUM_VOLTAGES 2
161 #define PALMAS_LDO_NUM_VOLTAGES 50
162 
163 #define SMPS10_VSEL (1<<3)
164 #define SMPS10_BOOST_EN (1<<2)
165 #define SMPS10_BYPASS_EN (1<<1)
166 #define SMPS10_SWITCH_EN (1<<0)
167 
168 #define REGULATOR_SLAVE 0
169 
170 static int palmas_smps_read(struct palmas *palmas, unsigned int reg,
171  unsigned int *dest)
172 {
173  unsigned int addr;
174 
175  addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
176 
177  return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
178 }
179 
180 static int palmas_smps_write(struct palmas *palmas, unsigned int reg,
181  unsigned int value)
182 {
183  unsigned int addr;
184 
185  addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
186 
187  return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
188 }
189 
190 static int palmas_ldo_read(struct palmas *palmas, unsigned int reg,
191  unsigned int *dest)
192 {
193  unsigned int addr;
194 
195  addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
196 
197  return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
198 }
199 
200 static int palmas_ldo_write(struct palmas *palmas, unsigned int reg,
201  unsigned int value)
202 {
203  unsigned int addr;
204 
205  addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
206 
207  return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
208 }
209 
210 static int palmas_is_enabled_smps(struct regulator_dev *dev)
211 {
212  struct palmas_pmic *pmic = rdev_get_drvdata(dev);
213  int id = rdev_get_id(dev);
214  unsigned int reg;
215 
216  palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
217 
218  reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
219  reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
220 
221  return !!(reg);
222 }
223 
224 static int palmas_enable_smps(struct regulator_dev *dev)
225 {
226  struct palmas_pmic *pmic = rdev_get_drvdata(dev);
227  int id = rdev_get_id(dev);
228  unsigned int reg;
229 
230  palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
231 
232  reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
233  reg |= SMPS_CTRL_MODE_ON;
234 
235  palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
236 
237  return 0;
238 }
239 
240 static int palmas_disable_smps(struct regulator_dev *dev)
241 {
242  struct palmas_pmic *pmic = rdev_get_drvdata(dev);
243  int id = rdev_get_id(dev);
244  unsigned int reg;
245 
246  palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
247 
248  reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
249 
250  palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
251 
252  return 0;
253 }
254 
255 
256 static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
257 {
258  struct palmas_pmic *pmic = rdev_get_drvdata(dev);
259  int id = rdev_get_id(dev);
260  unsigned int reg;
261 
262  palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
263  reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
264 
265  switch (mode) {
266  case REGULATOR_MODE_NORMAL:
267  reg |= SMPS_CTRL_MODE_ON;
268  break;
269  case REGULATOR_MODE_IDLE:
270  reg |= SMPS_CTRL_MODE_ECO;
271  break;
272  case REGULATOR_MODE_FAST:
273  reg |= SMPS_CTRL_MODE_PWM;
274  break;
275  default:
276  return -EINVAL;
277  }
278  palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
279 
280  return 0;
281 }
282 
283 static unsigned int palmas_get_mode_smps(struct regulator_dev *dev)
284 {
285  struct palmas_pmic *pmic = rdev_get_drvdata(dev);
286  int id = rdev_get_id(dev);
287  unsigned int reg;
288 
289  palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
290  reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
291  reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
292 
293  switch (reg) {
294  case SMPS_CTRL_MODE_ON:
295  return REGULATOR_MODE_NORMAL;
296  case SMPS_CTRL_MODE_ECO:
297  return REGULATOR_MODE_IDLE;
298  case SMPS_CTRL_MODE_PWM:
299  return REGULATOR_MODE_FAST;
300  }
301 
302  return 0;
303 }
304 
305 static int palmas_list_voltage_smps(struct regulator_dev *dev,
306  unsigned selector)
307 {
308  struct palmas_pmic *pmic = rdev_get_drvdata(dev);
309  int id = rdev_get_id(dev);
310  int mult = 1;
311 
312  if (!selector)
313  return 0;
314 
315  /* Read the multiplier set in VSEL register to return
316  * the correct voltage.
317  */
318  if (pmic->range[id])
319  mult = 2;
320 
321  /* Voltage is (0.49V + (selector * 0.01V)) * RANGE
322  * as defined in data sheet. RANGE is either x1 or x2
323  */
324  return (490000 + (selector * 10000)) * mult;
325 }
326 
327 static int palmas_get_voltage_smps_sel(struct regulator_dev *dev)
328 {
329  struct palmas_pmic *pmic = rdev_get_drvdata(dev);
330  int id = rdev_get_id(dev);
331  int selector;
332  unsigned int reg;
333  unsigned int addr;
334 
335  addr = palmas_regs_info[id].vsel_addr;
336 
337  palmas_smps_read(pmic->palmas, addr, &reg);
338 
339  selector = reg & PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
340 
341  /* Adjust selector to match list_voltage ranges */
342  if ((selector > 0) && (selector < 6))
343  selector = 6;
344  if (!selector)
345  selector = 5;
346  if (selector > 121)
347  selector = 121;
348  selector -= 5;
349 
350  return selector;
351 }
352 
353 static int palmas_set_voltage_smps_sel(struct regulator_dev *dev,
354  unsigned selector)
355 {
356  struct palmas_pmic *pmic = rdev_get_drvdata(dev);
357  int id = rdev_get_id(dev);
358  unsigned int reg = 0;
359  unsigned int addr;
360 
361  addr = palmas_regs_info[id].vsel_addr;
362 
363  /* Make sure we don't change the value of RANGE */
364  if (pmic->range[id])
365  reg |= PALMAS_SMPS12_VOLTAGE_RANGE;
366 
367  /* Adjust the linux selector into range used in VSEL register */
368  if (selector)
369  reg |= selector + 5;
370 
371  palmas_smps_write(pmic->palmas, addr, reg);
372 
373  return 0;
374 }
375 
376 static int palmas_map_voltage_smps(struct regulator_dev *rdev,
377  int min_uV, int max_uV)
378 {
379  struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
380  int id = rdev_get_id(rdev);
381  int ret, voltage;
382 
383  if (min_uV == 0)
384  return 0;
385 
386  if (pmic->range[id]) { /* RANGE is x2 */
387  if (min_uV < 1000000)
388  min_uV = 1000000;
389  ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 1;
390  } else { /* RANGE is x1 */
391  if (min_uV < 500000)
392  min_uV = 500000;
393  ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 1;
394  }
395 
396  /* Map back into a voltage to verify we're still in bounds */
397  voltage = palmas_list_voltage_smps(rdev, ret);
398  if (voltage < min_uV || voltage > max_uV)
399  return -EINVAL;
400 
401  return ret;
402 }
403 
404 static struct regulator_ops palmas_ops_smps = {
405  .is_enabled = palmas_is_enabled_smps,
406  .enable = palmas_enable_smps,
407  .disable = palmas_disable_smps,
408  .set_mode = palmas_set_mode_smps,
409  .get_mode = palmas_get_mode_smps,
410  .get_voltage_sel = palmas_get_voltage_smps_sel,
411  .set_voltage_sel = palmas_set_voltage_smps_sel,
412  .list_voltage = palmas_list_voltage_smps,
413  .map_voltage = palmas_map_voltage_smps,
414 };
415 
416 static struct regulator_ops palmas_ops_smps10 = {
417  .is_enabled = regulator_is_enabled_regmap,
418  .enable = regulator_enable_regmap,
419  .disable = regulator_disable_regmap,
420  .get_voltage_sel = regulator_get_voltage_sel_regmap,
421  .set_voltage_sel = regulator_set_voltage_sel_regmap,
422  .list_voltage = regulator_list_voltage_linear,
423  .map_voltage = regulator_map_voltage_linear,
424 };
425 
426 static int palmas_is_enabled_ldo(struct regulator_dev *dev)
427 {
428  struct palmas_pmic *pmic = rdev_get_drvdata(dev);
429  int id = rdev_get_id(dev);
430  unsigned int reg;
431 
432  palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
433 
434  reg &= PALMAS_LDO1_CTRL_STATUS;
435 
436  return !!(reg);
437 }
438 
439 static int palmas_list_voltage_ldo(struct regulator_dev *dev,
440  unsigned selector)
441 {
442  if (!selector)
443  return 0;
444 
445  /* voltage is 0.85V + (selector * 0.05v) */
446  return 850000 + (selector * 50000);
447 }
448 
449 static int palmas_map_voltage_ldo(struct regulator_dev *rdev,
450  int min_uV, int max_uV)
451 {
452  int ret, voltage;
453 
454  if (min_uV == 0)
455  return 0;
456 
457  if (min_uV < 900000)
458  min_uV = 900000;
459  ret = DIV_ROUND_UP(min_uV - 900000, 50000) + 1;
460 
461  /* Map back into a voltage to verify we're still in bounds */
462  voltage = palmas_list_voltage_ldo(rdev, ret);
463  if (voltage < min_uV || voltage > max_uV)
464  return -EINVAL;
465 
466  return ret;
467 }
468 
469 static struct regulator_ops palmas_ops_ldo = {
470  .is_enabled = palmas_is_enabled_ldo,
471  .enable = regulator_enable_regmap,
472  .disable = regulator_disable_regmap,
473  .get_voltage_sel = regulator_get_voltage_sel_regmap,
474  .set_voltage_sel = regulator_set_voltage_sel_regmap,
475  .list_voltage = palmas_list_voltage_ldo,
476  .map_voltage = palmas_map_voltage_ldo,
477 };
478 
479 /*
480  * setup the hardware based sleep configuration of the SMPS/LDO regulators
481  * from the platform data. This is different to the software based control
482  * supported by the regulator framework as it is controlled by toggling
483  * pins on the PMIC such as PREQ, SYSEN, ...
484  */
485 static int palmas_smps_init(struct palmas *palmas, int id,
486  struct palmas_reg_init *reg_init)
487 {
488  unsigned int reg;
489  unsigned int addr;
490  int ret;
491 
492  addr = palmas_regs_info[id].ctrl_addr;
493 
494  ret = palmas_smps_read(palmas, addr, &reg);
495  if (ret)
496  return ret;
497 
498  switch (id) {
499  case PALMAS_REG_SMPS10:
500  if (reg_init->mode_sleep) {
501  reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
502  reg |= reg_init->mode_sleep <<
503  PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
504  }
505  break;
506  default:
507  if (reg_init->warm_reset)
508  reg |= PALMAS_SMPS12_CTRL_WR_S;
509 
510  if (reg_init->roof_floor)
511  reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
512 
513  if (reg_init->mode_sleep) {
514  reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
515  reg |= reg_init->mode_sleep <<
516  PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
517  }
518  }
519 
520  ret = palmas_smps_write(palmas, addr, reg);
521  if (ret)
522  return ret;
523 
524  if (palmas_regs_info[id].tstep_addr && reg_init->tstep) {
525  addr = palmas_regs_info[id].tstep_addr;
526 
527  reg = reg_init->tstep & PALMAS_SMPS12_TSTEP_TSTEP_MASK;
528 
529  ret = palmas_smps_write(palmas, addr, reg);
530  if (ret)
531  return ret;
532  }
533 
534  if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
535  addr = palmas_regs_info[id].vsel_addr;
536 
537  reg = reg_init->vsel;
538 
539  ret = palmas_smps_write(palmas, addr, reg);
540  if (ret)
541  return ret;
542  }
543 
544 
545  return 0;
546 }
547 
548 static int palmas_ldo_init(struct palmas *palmas, int id,
549  struct palmas_reg_init *reg_init)
550 {
551  unsigned int reg;
552  unsigned int addr;
553  int ret;
554 
555  addr = palmas_regs_info[id].ctrl_addr;
556 
557  ret = palmas_ldo_read(palmas, addr, &reg);
558  if (ret)
559  return ret;
560 
561  if (reg_init->warm_reset)
562  reg |= PALMAS_LDO1_CTRL_WR_S;
563 
564  if (reg_init->mode_sleep)
565  reg |= PALMAS_LDO1_CTRL_MODE_SLEEP;
566 
567  ret = palmas_ldo_write(palmas, addr, reg);
568  if (ret)
569  return ret;
570 
571  return 0;
572 }
573 
574 static struct of_regulator_match palmas_matches[] = {
575  { .name = "smps12", },
576  { .name = "smps123", },
577  { .name = "smps3", },
578  { .name = "smps45", },
579  { .name = "smps457", },
580  { .name = "smps6", },
581  { .name = "smps7", },
582  { .name = "smps8", },
583  { .name = "smps9", },
584  { .name = "smps10", },
585  { .name = "ldo1", },
586  { .name = "ldo2", },
587  { .name = "ldo3", },
588  { .name = "ldo4", },
589  { .name = "ldo5", },
590  { .name = "ldo6", },
591  { .name = "ldo7", },
592  { .name = "ldo8", },
593  { .name = "ldo9", },
594  { .name = "ldoln", },
595  { .name = "ldousb", },
596 };
597 
598 static void __devinit palmas_dt_to_pdata(struct device *dev,
599  struct device_node *node,
600  struct palmas_pmic_platform_data *pdata)
601 {
602  struct device_node *regulators;
603  u32 prop;
604  int idx, ret;
605 
606  regulators = of_find_node_by_name(node, "regulators");
607  if (!regulators) {
608  dev_info(dev, "regulator node not found\n");
609  return;
610  }
611 
612  ret = of_regulator_match(dev, regulators, palmas_matches,
613  PALMAS_NUM_REGS);
614  if (ret < 0) {
615  dev_err(dev, "Error parsing regulator init data: %d\n", ret);
616  return;
617  }
618 
619  for (idx = 0; idx < PALMAS_NUM_REGS; idx++) {
620  if (!palmas_matches[idx].init_data ||
621  !palmas_matches[idx].of_node)
622  continue;
623 
624  pdata->reg_data[idx] = palmas_matches[idx].init_data;
625 
626  pdata->reg_init[idx] = devm_kzalloc(dev,
627  sizeof(struct palmas_reg_init), GFP_KERNEL);
628 
629  ret = of_property_read_u32(palmas_matches[idx].of_node,
630  "ti,warm_reset", &prop);
631  if (!ret)
632  pdata->reg_init[idx]->warm_reset = prop;
633 
634  ret = of_property_read_u32(palmas_matches[idx].of_node,
635  "ti,roof_floor", &prop);
636  if (!ret)
637  pdata->reg_init[idx]->roof_floor = prop;
638 
639  ret = of_property_read_u32(palmas_matches[idx].of_node,
640  "ti,mode_sleep", &prop);
641  if (!ret)
642  pdata->reg_init[idx]->mode_sleep = prop;
643 
644  ret = of_property_read_u32(palmas_matches[idx].of_node,
645  "ti,warm_reset", &prop);
646  if (!ret)
647  pdata->reg_init[idx]->warm_reset = prop;
648 
649  ret = of_property_read_u32(palmas_matches[idx].of_node,
650  "ti,tstep", &prop);
651  if (!ret)
652  pdata->reg_init[idx]->tstep = prop;
653 
654  ret = of_property_read_u32(palmas_matches[idx].of_node,
655  "ti,vsel", &prop);
656  if (!ret)
657  pdata->reg_init[idx]->vsel = prop;
658  }
659 
660  ret = of_property_read_u32(node, "ti,ldo6_vibrator", &prop);
661  if (!ret)
662  pdata->ldo6_vibrator = prop;
663 }
664 
665 
666 static __devinit int palmas_probe(struct platform_device *pdev)
667 {
668  struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
669  struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data;
670  struct device_node *node = pdev->dev.of_node;
671  struct regulator_dev *rdev;
672  struct regulator_config config = { };
673  struct palmas_pmic *pmic;
674  struct palmas_reg_init *reg_init;
675  int id = 0, ret;
676  unsigned int addr, reg;
677 
678  if (node && !pdata) {
679  pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
680 
681  if (!pdata)
682  return -ENOMEM;
683 
684  palmas_dt_to_pdata(&pdev->dev, node, pdata);
685  }
686 
687  pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
688  if (!pmic)
689  return -ENOMEM;
690 
691  pmic->dev = &pdev->dev;
692  pmic->palmas = palmas;
693  palmas->pmic = pmic;
694  platform_set_drvdata(pdev, pmic);
695 
696  ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, &reg);
697  if (ret)
698  return ret;
699 
700  if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN)
701  pmic->smps123 = 1;
702 
703  if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN)
704  pmic->smps457 = 1;
705 
706  config.regmap = palmas->regmap[REGULATOR_SLAVE];
707  config.dev = &pdev->dev;
708  config.driver_data = pmic;
709 
710  for (id = 0; id < PALMAS_REG_LDO1; id++) {
711 
712  /*
713  * Miss out regulators which are not available due
714  * to slaving configurations.
715  */
716  switch (id) {
717  case PALMAS_REG_SMPS12:
718  case PALMAS_REG_SMPS3:
719  if (pmic->smps123)
720  continue;
721  break;
722  case PALMAS_REG_SMPS123:
723  if (!pmic->smps123)
724  continue;
725  break;
726  case PALMAS_REG_SMPS45:
727  case PALMAS_REG_SMPS7:
728  if (pmic->smps457)
729  continue;
730  break;
731  case PALMAS_REG_SMPS457:
732  if (!pmic->smps457)
733  continue;
734  }
735 
736  /* Register the regulators */
737  pmic->desc[id].name = palmas_regs_info[id].name;
738  pmic->desc[id].id = id;
739 
740  switch (id) {
741  case PALMAS_REG_SMPS10:
742  pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES;
743  pmic->desc[id].ops = &palmas_ops_smps10;
744  pmic->desc[id].vsel_reg =
745  PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
746  PALMAS_SMPS10_CTRL);
747  pmic->desc[id].vsel_mask = SMPS10_VSEL;
748  pmic->desc[id].enable_reg =
749  PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
750  PALMAS_SMPS10_STATUS);
751  pmic->desc[id].enable_mask = SMPS10_BOOST_EN;
752  pmic->desc[id].min_uV = 3750000;
753  pmic->desc[id].uV_step = 1250000;
754  break;
755  default:
756  pmic->desc[id].ops = &palmas_ops_smps;
757  pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES;
758  }
759 
760  pmic->desc[id].type = REGULATOR_VOLTAGE;
761  pmic->desc[id].owner = THIS_MODULE;
762 
763  /* Initialise sleep/init values from platform data */
764  if (pdata) {
765  reg_init = pdata->reg_init[id];
766  if (reg_init) {
767  ret = palmas_smps_init(palmas, id, reg_init);
768  if (ret)
769  goto err_unregister_regulator;
770  }
771  }
772 
773  /*
774  * read and store the RANGE bit for later use
775  * This must be done before regulator is probed otherwise
776  * we error in probe with unsuportable ranges.
777  */
778  if (id != PALMAS_REG_SMPS10) {
779  addr = palmas_regs_info[id].vsel_addr;
780 
781  ret = palmas_smps_read(pmic->palmas, addr, &reg);
782  if (ret)
783  goto err_unregister_regulator;
784  if (reg & PALMAS_SMPS12_VOLTAGE_RANGE)
785  pmic->range[id] = 1;
786  }
787 
788  if (pdata)
789  config.init_data = pdata->reg_data[id];
790  else
791  config.init_data = NULL;
792 
793  config.of_node = palmas_matches[id].of_node;
794 
795  rdev = regulator_register(&pmic->desc[id], &config);
796  if (IS_ERR(rdev)) {
797  dev_err(&pdev->dev,
798  "failed to register %s regulator\n",
799  pdev->name);
800  ret = PTR_ERR(rdev);
801  goto err_unregister_regulator;
802  }
803 
804  /* Save regulator for cleanup */
805  pmic->rdev[id] = rdev;
806  }
807 
808  /* Start this loop from the id left from previous loop */
809  for (; id < PALMAS_NUM_REGS; id++) {
810 
811  /* Miss out regulators which are not available due
812  * to alternate functions.
813  */
814 
815  /* Register the regulators */
816  pmic->desc[id].name = palmas_regs_info[id].name;
817  pmic->desc[id].id = id;
818  pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
819 
820  pmic->desc[id].ops = &palmas_ops_ldo;
821 
822  pmic->desc[id].type = REGULATOR_VOLTAGE;
823  pmic->desc[id].owner = THIS_MODULE;
824  pmic->desc[id].vsel_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
825  palmas_regs_info[id].vsel_addr);
826  pmic->desc[id].vsel_mask = PALMAS_LDO1_VOLTAGE_VSEL_MASK;
827  pmic->desc[id].enable_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
828  palmas_regs_info[id].ctrl_addr);
829  pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE;
830 
831  if (pdata)
832  config.init_data = pdata->reg_data[id];
833  else
834  config.init_data = NULL;
835 
836  config.of_node = palmas_matches[id].of_node;
837 
838  rdev = regulator_register(&pmic->desc[id], &config);
839  if (IS_ERR(rdev)) {
840  dev_err(&pdev->dev,
841  "failed to register %s regulator\n",
842  pdev->name);
843  ret = PTR_ERR(rdev);
844  goto err_unregister_regulator;
845  }
846 
847  /* Save regulator for cleanup */
848  pmic->rdev[id] = rdev;
849 
850  /* Initialise sleep/init values from platform data */
851  if (pdata) {
852  reg_init = pdata->reg_init[id];
853  if (reg_init) {
854  ret = palmas_ldo_init(palmas, id, reg_init);
855  if (ret) {
856  regulator_unregister(pmic->rdev[id]);
857  goto err_unregister_regulator;
858  }
859  }
860  }
861  }
862 
863  return 0;
864 
865 err_unregister_regulator:
866  while (--id >= 0)
867  regulator_unregister(pmic->rdev[id]);
868  return ret;
869 }
870 
871 static int __devexit palmas_remove(struct platform_device *pdev)
872 {
873  struct palmas_pmic *pmic = platform_get_drvdata(pdev);
874  int id;
875 
876  for (id = 0; id < PALMAS_NUM_REGS; id++)
877  regulator_unregister(pmic->rdev[id]);
878  return 0;
879 }
880 
881 static struct of_device_id __devinitdata of_palmas_match_tbl[] = {
882  { .compatible = "ti,palmas-pmic", },
883  { /* end */ }
884 };
885 
886 static struct platform_driver palmas_driver = {
887  .driver = {
888  .name = "palmas-pmic",
889  .of_match_table = of_palmas_match_tbl,
890  .owner = THIS_MODULE,
891  },
892  .probe = palmas_probe,
893  .remove = __devexit_p(palmas_remove),
894 };
895 
896 static int __init palmas_init(void)
897 {
898  return platform_driver_register(&palmas_driver);
899 }
900 subsys_initcall(palmas_init);
901 
902 static void __exit palmas_exit(void)
903 {
904  platform_driver_unregister(&palmas_driver);
905 }
906 module_exit(palmas_exit);
907 
908 MODULE_AUTHOR("Graeme Gregory <[email protected]>");
909 MODULE_DESCRIPTION("Palmas voltage regulator driver");
910 MODULE_LICENSE("GPL");
911 MODULE_ALIAS("platform:palmas-pmic");
912 MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);
Generated on Thu Jan 10 2013 14:16:33 for Linux Kernel by   doxygen 1.8.2