Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

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 struct pfuze_regulator {
 60         struct regulator_desc desc;
 61         unsigned char stby_reg;
 62         unsigned char stby_mask;
 63 };
 64 
 65 struct pfuze_chip {
 66         struct regmap *regmap;
 67         struct device *dev;
 68         struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
 69         struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
 70 };
 71 
 72 static const int pfuze100_swbst[] = {
 73         5000000, 5050000, 5100000, 5150000,
 74 };
 75 
 76 static const int pfuze100_vsnvs[] = {
 77         1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
 78 };
 79 
 80 static const struct i2c_device_id pfuze_device_id[] = {
 81         {.name = "pfuze100"},
 82         {},
 83 };
 84 MODULE_DEVICE_TABLE(i2c, pfuze_device_id);
 85 
 86 static const struct of_device_id pfuze_dt_ids[] = {
 87         { .compatible = "fsl,pfuze100" },
 88         {},
 89 };
 90 MODULE_DEVICE_TABLE(of, pfuze_dt_ids);
 91 
 92 static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 93 {
 94         struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
 95         int id = rdev->desc->id;
 96         unsigned int ramp_bits;
 97         int ret;
 98 
 99         if (id < PFUZE100_SWBST) {
100                 ramp_delay = 12500 / ramp_delay;
101                 ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
102                 ret = regmap_update_bits(pfuze100->regmap,
103                                          rdev->desc->vsel_reg + 4,
104                                          0xc0, ramp_bits << 6);
105                 if (ret < 0)
106                         dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
107         } else
108                 ret = -EACCES;
109 
110         return ret;
111 }
112 
113 static struct regulator_ops pfuze100_ldo_regulator_ops = {
114         .enable = regulator_enable_regmap,
115         .disable = regulator_disable_regmap,
116         .is_enabled = regulator_is_enabled_regmap,
117         .list_voltage = regulator_list_voltage_linear,
118         .set_voltage_sel = regulator_set_voltage_sel_regmap,
119         .get_voltage_sel = regulator_get_voltage_sel_regmap,
120 };
121 
122 static struct regulator_ops pfuze100_fixed_regulator_ops = {
123         .list_voltage = regulator_list_voltage_linear,
124 };
125 
126 static struct regulator_ops pfuze100_sw_regulator_ops = {
127         .list_voltage = regulator_list_voltage_linear,
128         .set_voltage_sel = regulator_set_voltage_sel_regmap,
129         .get_voltage_sel = regulator_get_voltage_sel_regmap,
130         .set_voltage_time_sel = regulator_set_voltage_time_sel,
131         .set_ramp_delay = pfuze100_set_ramp_delay,
132 };
133 
134 static struct regulator_ops pfuze100_swb_regulator_ops = {
135         .list_voltage = regulator_list_voltage_table,
136         .map_voltage = regulator_map_voltage_ascend,
137         .set_voltage_sel = regulator_set_voltage_sel_regmap,
138         .get_voltage_sel = regulator_get_voltage_sel_regmap,
139 
140 };
141 
142 #define PFUZE100_FIXED_REG(_name, base, voltage)        \
143         [PFUZE100_ ## _name] = {        \
144                 .desc = {       \
145                         .name = #_name, \
146                         .n_voltages = 1,        \
147                         .ops = &pfuze100_fixed_regulator_ops,   \
148                         .type = REGULATOR_VOLTAGE,      \
149                         .id = PFUZE100_ ## _name,       \
150                         .owner = THIS_MODULE,   \
151                         .min_uV = (voltage),    \
152                         .enable_reg = (base),   \
153                         .enable_mask = 0x10,    \
154                 },      \
155         }
156 
157 #define PFUZE100_SW_REG(_name, base, min, max, step)    \
158         [PFUZE100_ ## _name] = {        \
159                 .desc = {       \
160                         .name = #_name,\
161                         .n_voltages = ((max) - (min)) / (step) + 1,     \
162                         .ops = &pfuze100_sw_regulator_ops,      \
163                         .type = REGULATOR_VOLTAGE,      \
164                         .id = PFUZE100_ ## _name,       \
165                         .owner = THIS_MODULE,   \
166                         .min_uV = (min),        \
167                         .uV_step = (step),      \
168                         .vsel_reg = (base) + PFUZE100_VOL_OFFSET,       \
169                         .vsel_mask = 0x3f,      \
170                 },      \
171                 .stby_reg = (base) + PFUZE100_STANDBY_OFFSET,   \
172                 .stby_mask = 0x3f,      \
173         }
174 
175 #define PFUZE100_SWB_REG(_name, base, mask, voltages)   \
176         [PFUZE100_ ## _name] = {        \
177                 .desc = {       \
178                         .name = #_name, \
179                         .n_voltages = ARRAY_SIZE(voltages),     \
180                         .ops = &pfuze100_swb_regulator_ops,     \
181                         .type = REGULATOR_VOLTAGE,      \
182                         .id = PFUZE100_ ## _name,       \
183                         .owner = THIS_MODULE,   \
184                         .volt_table = voltages, \
185                         .vsel_reg = (base),     \
186                         .vsel_mask = (mask),    \
187                 },      \
188         }
189 
190 #define PFUZE100_VGEN_REG(_name, base, min, max, step)  \
191         [PFUZE100_ ## _name] = {        \
192                 .desc = {       \
193                         .name = #_name, \
194                         .n_voltages = ((max) - (min)) / (step) + 1,     \
195                         .ops = &pfuze100_ldo_regulator_ops,     \
196                         .type = REGULATOR_VOLTAGE,      \
197                         .id = PFUZE100_ ## _name,       \
198                         .owner = THIS_MODULE,   \
199                         .min_uV = (min),        \
200                         .uV_step = (step),      \
201                         .vsel_reg = (base),     \
202                         .vsel_mask = 0xf,       \
203                         .enable_reg = (base),   \
204                         .enable_mask = 0x10,    \
205                 },      \
206                 .stby_reg = (base),     \
207                 .stby_mask = 0x20,      \
208         }
209 
210 static struct pfuze_regulator pfuze100_regulators[] = {
211         PFUZE100_SW_REG(SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
212         PFUZE100_SW_REG(SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
213         PFUZE100_SW_REG(SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
214         PFUZE100_SW_REG(SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
215         PFUZE100_SW_REG(SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
216         PFUZE100_SW_REG(SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
217         PFUZE100_SWB_REG(SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
218         PFUZE100_SWB_REG(VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
219         PFUZE100_FIXED_REG(VREFDDR, PFUZE100_VREFDDRCON, 750000),
220         PFUZE100_VGEN_REG(VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
221         PFUZE100_VGEN_REG(VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
222         PFUZE100_VGEN_REG(VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
223         PFUZE100_VGEN_REG(VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
224         PFUZE100_VGEN_REG(VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
225         PFUZE100_VGEN_REG(VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
226 };
227 
228 #ifdef CONFIG_OF
229 static struct of_regulator_match pfuze100_matches[] = {
230         { .name = "sw1ab",      },
231         { .name = "sw1c",       },
232         { .name = "sw2",        },
233         { .name = "sw3a",       },
234         { .name = "sw3b",       },
235         { .name = "sw4",        },
236         { .name = "swbst",      },
237         { .name = "vsnvs",      },
238         { .name = "vrefddr",    },
239         { .name = "vgen1",      },
240         { .name = "vgen2",      },
241         { .name = "vgen3",      },
242         { .name = "vgen4",      },
243         { .name = "vgen5",      },
244         { .name = "vgen6",      },
245 };
246 
247 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
248 {
249         struct device *dev = chip->dev;
250         struct device_node *np, *parent;
251         int ret;
252 
253         np = of_node_get(dev->parent->of_node);
254         if (!np)
255                 return 0;
256 
257         parent = of_find_node_by_name(np, "regulators");
258         if (!parent) {
259                 dev_err(dev, "regulators node not found\n");
260                 return -EINVAL;
261         }
262 
263         ret = of_regulator_match(dev, parent, pfuze100_matches,
264                                  ARRAY_SIZE(pfuze100_matches));
265 
266         of_node_put(parent);
267         if (ret < 0) {
268                 dev_err(dev, "Error parsing regulator init data: %d\n",
269                         ret);
270                 return ret;
271         }
272 
273         return 0;
274 }
275 
276 static inline struct regulator_init_data *match_init_data(int index)
277 {
278         return pfuze100_matches[index].init_data;
279 }
280 
281 static inline struct device_node *match_of_node(int index)
282 {
283         return pfuze100_matches[index].of_node;
284 }
285 #else
286 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
287 {
288         return 0;
289 }
290 
291 static inline struct regulator_init_data *match_init_data(int index)
292 {
293         return NULL;
294 }
295 
296 static inline struct device_node *match_of_node(int index)
297 {
298         return NULL;
299 }
300 #endif
301 
302 static int pfuze_identify(struct pfuze_chip *pfuze_chip)
303 {
304         unsigned int value;
305         int ret;
306 
307         ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
308         if (ret)
309                 return ret;
310 
311         switch (value & 0x0f) {
312         /*
313          * Freescale misprogrammed 1-3% of parts prior to week 8 of 2013
314          * as ID=8
315          */
316         case 0x8:
317                 dev_info(pfuze_chip->dev, "Assuming misprogrammed ID=0x8");
318         case 0x0:
319                 break;
320         default:
321                 dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
322                 return -ENODEV;
323         }
324 
325         ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
326         if (ret)
327                 return ret;
328         dev_info(pfuze_chip->dev,
329                  "Full layer: %x, Metal layer: %x\n",
330                  (value & 0xf0) >> 4, value & 0x0f);
331 
332         ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
333         if (ret)
334                 return ret;
335         dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
336                  (value & 0xc) >> 2, value & 0x3);
337 
338         return 0;
339 }
340 
341 static const struct regmap_config pfuze_regmap_config = {
342         .reg_bits = 8,
343         .val_bits = 8,
344         .max_register = PFUZE_NUMREGS - 1,
345         .cache_type = REGCACHE_RBTREE,
346 };
347 
348 static int pfuze100_regulator_probe(struct i2c_client *client,
349                                     const struct i2c_device_id *id)
350 {
351         struct pfuze_chip *pfuze_chip;
352         struct pfuze_regulator_platform_data *pdata =
353             dev_get_platdata(&client->dev);
354         struct regulator_config config = { };
355         int i, ret;
356 
357         pfuze_chip = devm_kzalloc(&client->dev, sizeof(*pfuze_chip),
358                         GFP_KERNEL);
359         if (!pfuze_chip)
360                 return -ENOMEM;
361 
362         i2c_set_clientdata(client, pfuze_chip);
363 
364         memcpy(pfuze_chip->regulator_descs, pfuze100_regulators,
365                 sizeof(pfuze_chip->regulator_descs));
366 
367         pfuze_chip->dev = &client->dev;
368 
369         pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
370         if (IS_ERR(pfuze_chip->regmap)) {
371                 ret = PTR_ERR(pfuze_chip->regmap);
372                 dev_err(&client->dev,
373                         "regmap allocation failed with err %d\n", ret);
374                 return ret;
375         }
376 
377         ret = pfuze_identify(pfuze_chip);
378         if (ret) {
379                 dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
380                 return ret;
381         }
382 
383         ret = pfuze_parse_regulators_dt(pfuze_chip);
384         if (ret)
385                 return ret;
386 
387         for (i = 0; i < PFUZE100_MAX_REGULATOR; i++) {
388                 struct regulator_init_data *init_data;
389                 struct regulator_desc *desc;
390                 int val;
391 
392                 desc = &pfuze_chip->regulator_descs[i].desc;
393 
394                 if (pdata)
395                         init_data = pdata->init_data[i];
396                 else
397                         init_data = match_init_data(i);
398 
399                 /* SW2~SW4 high bit check and modify the voltage value table */
400                 if (i > PFUZE100_SW1C && i < PFUZE100_SWBST) {
401                         regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
402                         if (val & 0x40) {
403                                 desc->min_uV = 800000;
404                                 desc->uV_step = 50000;
405                                 desc->n_voltages = 51;
406                         }
407                 }
408 
409                 config.dev = &client->dev;
410                 config.init_data = init_data;
411                 config.driver_data = pfuze_chip;
412                 config.of_node = match_of_node(i);
413 
414                 pfuze_chip->regulators[i] =
415                         devm_regulator_register(&client->dev, desc, &config);
416                 if (IS_ERR(pfuze_chip->regulators[i])) {
417                         dev_err(&client->dev, "register regulator%s failed\n",
418                                 pfuze100_regulators[i].desc.name);
419                         return PTR_ERR(pfuze_chip->regulators[i]);
420                 }
421         }
422 
423         return 0;
424 }
425 
426 static struct i2c_driver pfuze_driver = {
427         .id_table = pfuze_device_id,
428         .driver = {
429                 .name = "pfuze100-regulator",
430                 .owner = THIS_MODULE,
431                 .of_match_table = pfuze_dt_ids,
432         },
433         .probe = pfuze100_regulator_probe,
434 };
435 module_i2c_driver(pfuze_driver);
436 
437 MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
438 MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100 PMIC");
439 MODULE_LICENSE("GPL v2");
440 MODULE_ALIAS("i2c:pfuze100-regulator");
441 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us