drivers/staging/omap-thermal/omap-bandgap.c

   1 /*
   2  * OMAP4 Bandgap temperature sensor driver
   3  *
   4  * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
   5  * Author: J Keerthy <j-keerthy@ti.com>
   6  * Author: Moiz Sonasath <m-sonasath@ti.com>
   7  * Couple of fixes, DT and MFD adaptation:
   8  *   Eduardo Valentin <eduardo.valentin@ti.com>
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * version 2 as published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  22  * 02110-1301 USA
  23  *
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/export.h>
  28 #include <linux/init.h>
  29 #include <linux/kernel.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/clk.h>
  32 #include <linux/gpio.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/err.h>
  35 #include <linux/types.h>
  36 #include <linux/mutex.h>
  37 #include <linux/reboot.h>
  38 #include <linux/of_device.h>
  39 #include <linux/of_platform.h>
  40 #include <linux/of_irq.h>
  41 #include <linux/io.h>
  42
  43 #include "omap-bandgap.h"
  44
  45 static u32 omap_bandgap_readl(struct omap_bandgap *bg_ptr, u32 reg)
  46 {
  47         return readl(bg_ptr->base + reg);
  48 }
  49
  50 static void omap_bandgap_writel(struct omap_bandgap *bg_ptr, u32 val, u32 reg)
  51 {
  52         writel(val, bg_ptr->base + reg);
  53 }
  54
  55 static int omap_bandgap_power(struct omap_bandgap *bg_ptr, bool on)
  56 {
  57         struct temp_sensor_registers *tsr;
  58         int i;
  59         u32 ctrl;
  60
  61         if (!OMAP_BANDGAP_HAS(bg_ptr, POWER_SWITCH))
  62                 return 0;
  63
  64         for (i = 0; i < bg_ptr->conf->sensor_count; i++) {
  65                 tsr = bg_ptr->conf->sensors[i].registers;
  66                 ctrl = omap_bandgap_readl(bg_ptr, tsr->temp_sensor_ctrl);
  67                 ctrl &= ~tsr->bgap_tempsoff_mask;
  68                 /* active on 0 */
  69                 ctrl |= !on << __ffs(tsr->bgap_tempsoff_mask);
  70
  71                 /* write BGAP_TEMPSOFF should be reset to 0 */
  72                 omap_bandgap_writel(bg_ptr, ctrl, tsr->temp_sensor_ctrl);
  73         }
  74
  75         return 0;
  76 }
  77
  78 static u32 omap_bandgap_read_temp(struct omap_bandgap *bg_ptr, int id)
  79 {
  80         struct temp_sensor_registers *tsr;
  81         u32 temp, ctrl, reg;
  82
  83         tsr = bg_ptr->conf->sensors[id].registers;
  84         reg = tsr->temp_sensor_ctrl;
  85
  86         if (OMAP_BANDGAP_HAS(bg_ptr, FREEZE_BIT)) {
  87                 ctrl = omap_bandgap_readl(bg_ptr, tsr->bgap_mask_ctrl);
  88                 ctrl |= tsr->mask_freeze_mask;
  89                 omap_bandgap_writel(bg_ptr, ctrl, tsr->bgap_mask_ctrl);
  90                 /*
  91                  * In case we cannot read from cur_dtemp / dtemp_0,
  92                  * then we read from the last valid temp read
  93                  */
  94                 reg = tsr->ctrl_dtemp_1;
  95         }
  96
  97         /* read temperature */
  98         temp = omap_bandgap_readl(bg_ptr, reg);
  99         temp &= tsr->bgap_dtemp_mask;
 100
 101         if (OMAP_BANDGAP_HAS(bg_ptr, FREEZE_BIT)) {
 102                 ctrl = omap_bandgap_readl(bg_ptr, tsr->bgap_mask_ctrl);
 103                 ctrl &= ~tsr->mask_freeze_mask;
 104                 omap_bandgap_writel(bg_ptr, ctrl, tsr->bgap_mask_ctrl);
 105         }
 106
 107         return temp;
 108 }
 109
 110 /* This is the Talert handler. Call it only if HAS(TALERT) is set */
 111 static irqreturn_t talert_irq_handler(int irq, void *data)
 112 {
 113         struct omap_bandgap *bg_ptr = data;
 114         struct temp_sensor_registers *tsr;
 115         u32 t_hot = 0, t_cold = 0, ctrl;
 116         int i;
 117
 118         bg_ptr = data;
 119         /* Read the status of t_hot */
 120         for (i = 0; i < bg_ptr->conf->sensor_count; i++) {
 121                 tsr = bg_ptr->conf->sensors[i].registers;
 122                 t_hot = omap_bandgap_readl(bg_ptr, tsr->bgap_status);
 123                 t_hot &= tsr->status_hot_mask;
 124
 125                 /* Read the status of t_cold */
 126                 t_cold = omap_bandgap_readl(bg_ptr, tsr->bgap_status);
 127                 t_cold &= tsr->status_cold_mask;
 128
 129                 if (!t_cold && !t_hot)
 130                         continue;
 131
 132                 ctrl = omap_bandgap_readl(bg_ptr, tsr->bgap_mask_ctrl);
 133                 /*
 134                  * One TALERT interrupt: Two sources
 135                  * If the interrupt is due to t_hot then mask t_hot and
 136                  * and unmask t_cold else mask t_cold and unmask t_hot
 137                  */
 138                 if (t_hot) {
 139                         ctrl &= ~tsr->mask_hot_mask;
 140                         ctrl |= tsr->mask_cold_mask;
 141                 } else if (t_cold) {
 142                         ctrl &= ~tsr->mask_cold_mask;
 143                         ctrl |= tsr->mask_hot_mask;
 144                 }
 145
 146                 omap_bandgap_writel(bg_ptr, ctrl, tsr->bgap_mask_ctrl);
 147
 148                 dev_dbg(bg_ptr->dev,
 149                         "%s: IRQ from %s sensor: hotevent %d coldevent %d\n",
 150                         __func__, bg_ptr->conf->sensors[i].domain,
 151                         t_hot, t_cold);
 152
 153                 /* report temperature to whom may concern */
 154                 if (bg_ptr->conf->report_temperature)
 155                         bg_ptr->conf->report_temperature(bg_ptr, i);
 156         }
 157
 158         return IRQ_HANDLED;
 159 }
 160
 161 /* This is the Tshut handler. Call it only if HAS(TSHUT) is set */
 162 static irqreturn_t omap_bandgap_tshut_irq_handler(int irq, void *data)
 163 {
 164         pr_emerg("%s: TSHUT temperature reached. Needs shut down...\n",
 165                  __func__);
 166
 167         orderly_poweroff(true);
 168
 169         return IRQ_HANDLED;
 170 }
 171
 172 static
 173 int adc_to_temp_conversion(struct omap_bandgap *bg_ptr, int id, int adc_val,
 174                            int *t)
 175 {
 176         struct temp_sensor_data *ts_data = bg_ptr->conf->sensors[id].ts_data;
 177
 178         /* look up for temperature in the table and return the temperature */
 179         if (adc_val < ts_data->adc_start_val || adc_val > ts_data->adc_end_val)
 180                 return -ERANGE;
 181
 182         *t = bg_ptr->conf->conv_table[adc_val - ts_data->adc_start_val];
 183
 184         return 0;
 185 }
 186
 187 static int temp_to_adc_conversion(long temp, struct omap_bandgap *bg_ptr, int i,
 188                                   int *adc)
 189 {
 190         struct temp_sensor_data *ts_data = bg_ptr->conf->sensors[i].ts_data;
 191         const int *conv_table = bg_ptr->conf->conv_table;
 192         int high, low, mid;
 193
 194         low = 0;
 195         high = ts_data->adc_end_val - ts_data->adc_start_val;
 196         mid = (high + low) / 2;
 197
 198         if (temp < conv_table[low] || temp > conv_table[high])
 199                 return -EINVAL;
 200
 201         while (low < high) {
 202                 if (temp < conv_table[mid])
 203                         high = mid - 1;
 204                 else
 205                         low = mid + 1;
 206                 mid = (low + high) / 2;
 207         }
 208
 209         *adc = ts_data->adc_start_val + low;
 210
 211         return 0;
 212 }
 213
 214 /* Talert masks. Call it only if HAS(TALERT) is set */
 215 static int temp_sensor_unmask_interrupts(struct omap_bandgap *bg_ptr, int id,
 216                                          u32 t_hot, u32 t_cold)
 217 {
 218         struct temp_sensor_registers *tsr;
 219         u32 temp, reg_val;
 220
 221         /* Read the current on die temperature */
 222         temp = omap_bandgap_read_temp(bg_ptr, id);
 223
 224         tsr = bg_ptr->conf->sensors[id].registers;
 225         reg_val = omap_bandgap_readl(bg_ptr, tsr->bgap_mask_ctrl);
 226
 227         if (temp < t_hot)
 228                 reg_val |= tsr->mask_hot_mask;
 229         else
 230                 reg_val &= ~tsr->mask_hot_mask;
 231
 232         if (t_cold < temp)
 233                 reg_val |= tsr->mask_cold_mask;
 234         else
 235                 reg_val &= ~tsr->mask_cold_mask;
 236         omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_mask_ctrl);
 237
 238         return 0;
 239 }
 240
 241 static
 242 int add_hyst(int adc_val, int hyst_val, struct omap_bandgap *bg_ptr, int i,
 243              u32 *sum)
 244 {
 245         int temp, ret;
 246
 247         ret = adc_to_temp_conversion(bg_ptr, i, adc_val, &temp);
 248         if (ret < 0)
 249                 return ret;
 250
 251         temp += hyst_val;
 252
 253         return temp_to_adc_conversion(temp, bg_ptr, i, sum);
 254 }
 255
 256 /* Talert Thot threshold. Call it only if HAS(TALERT) is set */
 257 static
 258 int temp_sensor_configure_thot(struct omap_bandgap *bg_ptr, int id, int t_hot)
 259 {
 260         struct temp_sensor_data *ts_data = bg_ptr->conf->sensors[id].ts_data;
 261         struct temp_sensor_registers *tsr;
 262         u32 thresh_val, reg_val;
 263         int cold, err = 0;
 264
 265         tsr = bg_ptr->conf->sensors[id].registers;
 266
 267         /* obtain the T cold value */
 268         thresh_val = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold);
 269         cold = (thresh_val & tsr->threshold_tcold_mask) >>
 270             __ffs(tsr->threshold_tcold_mask);
 271         if (t_hot <= cold) {
 272                 /* change the t_cold to t_hot - 5000 millidegrees */
 273                 err |= add_hyst(t_hot, -ts_data->hyst_val, bg_ptr, id, &cold);
 274                 /* write the new t_cold value */
 275                 reg_val = thresh_val & (~tsr->threshold_tcold_mask);
 276                 reg_val |= cold << __ffs(tsr->threshold_tcold_mask);
 277                 omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold);
 278                 thresh_val = reg_val;
 279         }
 280
 281         /* write the new t_hot value */
 282         reg_val = thresh_val & ~tsr->threshold_thot_mask;
 283         reg_val |= (t_hot << __ffs(tsr->threshold_thot_mask));
 284         omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold);
 285         if (err) {
 286                 dev_err(bg_ptr->dev, "failed to reprogram thot threshold\n");
 287                 return -EIO;
 288         }
 289
 290         return temp_sensor_unmask_interrupts(bg_ptr, id, t_hot, cold);
 291 }
 292
 293 /* Talert Thot and Tcold thresholds. Call it only if HAS(TALERT) is set */
 294 static
 295 int temp_sensor_init_talert_thresholds(struct omap_bandgap *bg_ptr, int id,
 296                                        int t_hot, int t_cold)
 297 {
 298         struct temp_sensor_registers *tsr;
 299         u32 reg_val, thresh_val;
 300
 301         tsr = bg_ptr->conf->sensors[id].registers;
 302         thresh_val = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold);
 303
 304         /* write the new t_cold value */
 305         reg_val = thresh_val & ~tsr->threshold_tcold_mask;
 306         reg_val |= (t_cold << __ffs(tsr->threshold_tcold_mask));
 307         omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold);
 308
 309         thresh_val = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold);
 310
 311         /* write the new t_hot value */
 312         reg_val = thresh_val & ~tsr->threshold_thot_mask;
 313         reg_val |= (t_hot << __ffs(tsr->threshold_thot_mask));
 314         omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold);
 315
 316         reg_val = omap_bandgap_readl(bg_ptr, tsr->bgap_mask_ctrl);
 317         reg_val |= tsr->mask_hot_mask;
 318         reg_val |= tsr->mask_cold_mask;
 319         omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_mask_ctrl);
 320
 321         return 0;
 322 }
 323
 324 /* Talert Tcold threshold. Call it only if HAS(TALERT) is set */
 325 static
 326 int temp_sensor_configure_tcold(struct omap_bandgap *bg_ptr, int id,
 327                                 int t_cold)
 328 {
 329         struct temp_sensor_data *ts_data = bg_ptr->conf->sensors[id].ts_data;
 330         struct temp_sensor_registers *tsr;
 331         u32 thresh_val, reg_val;
 332         int hot, err = 0;
 333
 334         tsr = bg_ptr->conf->sensors[id].registers;
 335         /* obtain the T cold value */
 336         thresh_val = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold);
 337         hot = (thresh_val & tsr->threshold_thot_mask) >>
 338             __ffs(tsr->threshold_thot_mask);
 339
 340         if (t_cold >= hot) {
 341                 /* change the t_hot to t_cold + 5000 millidegrees */
 342                 err |= add_hyst(t_cold, ts_data->hyst_val, bg_ptr, id, &hot);
 343                 /* write the new t_hot value */
 344                 reg_val = thresh_val & (~tsr->threshold_thot_mask);
 345                 reg_val |= hot << __ffs(tsr->threshold_thot_mask);
 346                 omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold);
 347                 thresh_val = reg_val;
 348         }
 349
 350         /* write the new t_cold value */
 351         reg_val = thresh_val & ~tsr->threshold_tcold_mask;
 352         reg_val |= (t_cold << __ffs(tsr->threshold_tcold_mask));
 353         omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold);
 354         if (err) {
 355                 dev_err(bg_ptr->dev, "failed to reprogram tcold threshold\n");
 356                 return -EIO;
 357         }
 358
 359         return temp_sensor_unmask_interrupts(bg_ptr, id, hot, t_cold);
 360 }
 361
 362 /* This is Tshut Thot config. Call it only if HAS(TSHUT_CONFIG) is set */
 363 static int temp_sensor_configure_tshut_hot(struct omap_bandgap *bg_ptr,
 364                                            int id, int tshut_hot)
 365 {
 366         struct temp_sensor_registers *tsr;
 367         u32 reg_val;
 368
 369         tsr = bg_ptr->conf->sensors[id].registers;
 370         reg_val = omap_bandgap_readl(bg_ptr, tsr->tshut_threshold);
 371         reg_val &= ~tsr->tshut_hot_mask;
 372         reg_val |= tshut_hot << __ffs(tsr->tshut_hot_mask);
 373         omap_bandgap_writel(bg_ptr, reg_val, tsr->tshut_threshold);
 374
 375         return 0;
 376 }
 377
 378 /* This is Tshut Tcold config. Call it only if HAS(TSHUT_CONFIG) is set */
 379 static int temp_sensor_configure_tshut_cold(struct omap_bandgap *bg_ptr,
 380                                             int id, int tshut_cold)
 381 {
 382         struct temp_sensor_registers *tsr;
 383         u32 reg_val;
 384
 385         tsr = bg_ptr->conf->sensors[id].registers;
 386         reg_val = omap_bandgap_readl(bg_ptr, tsr->tshut_threshold);
 387         reg_val &= ~tsr->tshut_cold_mask;
 388         reg_val |= tshut_cold << __ffs(tsr->tshut_cold_mask);
 389         omap_bandgap_writel(bg_ptr, reg_val, tsr->tshut_threshold);
 390
 391         return 0;
 392 }
 393
 394 /* This is counter config. Call it only if HAS(COUNTER) is set */
 395 static int configure_temp_sensor_counter(struct omap_bandgap *bg_ptr, int id,
 396                                          u32 counter)
 397 {
 398         struct temp_sensor_registers *tsr;
 399         u32 val;
 400
 401         tsr = bg_ptr->conf->sensors[id].registers;
 402         val = omap_bandgap_readl(bg_ptr, tsr->bgap_counter);
 403         val &= ~tsr->counter_mask;
 404         val |= counter << __ffs(tsr->counter_mask);
 405         omap_bandgap_writel(bg_ptr, val, tsr->bgap_counter);
 406
 407         return 0;
 408 }
 409
 410 #define bandgap_is_valid(b)                                             \
 411                         (!IS_ERR_OR_NULL(b))
 412 #define bandgap_is_valid_sensor_id(b, i)                                \
 413                         ((i) >= 0 && (i) < (b)->conf->sensor_count)
 414 static inline int omap_bandgap_validate(struct omap_bandgap *bg_ptr, int id)
 415 {
 416         if (!bandgap_is_valid(bg_ptr)) {
 417                 pr_err("%s: invalid bandgap pointer\n", __func__);
 418                 return -EINVAL;
 419         }
 420
 421         if (!bandgap_is_valid_sensor_id(bg_ptr, id)) {
 422                 dev_err(bg_ptr->dev, "%s: sensor id out of range (%d)\n",
 423                         __func__, id);
 424                 return -ERANGE;
 425         }
 426
 427         return 0;
 428 }
 429
 430 /* Exposed APIs */
 431 /**
 432  * omap_bandgap_read_thot() - reads sensor current thot
 433  * @bg_ptr - pointer to bandgap instance
 434  * @id - sensor id
 435  * @thot - resulting current thot value
 436  *
 437  * returns 0 on success or the proper error code
 438  */
 439 int omap_bandgap_read_thot(struct omap_bandgap *bg_ptr, int id,
 440                            int *thot)
 441 {
 442         struct temp_sensor_registers *tsr;
 443         u32 temp;
 444         int ret;
 445
 446         ret = omap_bandgap_validate(bg_ptr, id);
 447         if (ret)
 448                 return ret;
 449
 450         if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT))
 451                 return -ENOTSUPP;
 452
 453         tsr = bg_ptr->conf->sensors[id].registers;
 454         temp = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold);
 455         temp = (temp & tsr->threshold_thot_mask) >>
 456                 __ffs(tsr->threshold_thot_mask);
 457         ret |= adc_to_temp_conversion(bg_ptr, id, temp, &temp);
 458         if (ret) {
 459                 dev_err(bg_ptr->dev, "failed to read thot\n");
 460                 return -EIO;
 461         }
 462
 463         *thot = temp;
 464
 465         return 0;
 466 }
 467
 468 /**
 469  * omap_bandgap_write_thot() - sets sensor current thot
 470  * @bg_ptr - pointer to bandgap instance
 471  * @id - sensor id
 472  * @val - desired thot value
 473  *
 474  * returns 0 on success or the proper error code
 475  */
 476 int omap_bandgap_write_thot(struct omap_bandgap *bg_ptr, int id, int val)
 477 {
 478         struct temp_sensor_data *ts_data;
 479         struct temp_sensor_registers *tsr;
 480         u32 t_hot;
 481         int ret;
 482
 483         ret = omap_bandgap_validate(bg_ptr, id);
 484         if (ret)
 485                 return ret;
 486
 487         if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT))
 488                 return -ENOTSUPP;
 489
 490         ts_data = bg_ptr->conf->sensors[id].ts_data;
 491         tsr = bg_ptr->conf->sensors[id].registers;
 492
 493         if (val < ts_data->min_temp + ts_data->hyst_val)
 494                 return -EINVAL;
 495         ret = temp_to_adc_conversion(val, bg_ptr, id, &t_hot);
 496         if (ret < 0)
 497                 return ret;
 498
 499         mutex_lock(&bg_ptr->bg_mutex);
 500         temp_sensor_configure_thot(bg_ptr, id, t_hot);
 501         mutex_unlock(&bg_ptr->bg_mutex);
 502
 503         return 0;
 504 }
 505
 506 /**
 507  * omap_bandgap_read_tcold() - reads sensor current tcold
 508  * @bg_ptr - pointer to bandgap instance
 509  * @id - sensor id
 510  * @tcold - resulting current tcold value
 511  *
 512  * returns 0 on success or the proper error code
 513  */
 514 int omap_bandgap_read_tcold(struct omap_bandgap *bg_ptr, int id,
 515                             int *tcold)
 516 {
 517         struct temp_sensor_registers *tsr;
 518         u32 temp;
 519         int ret;
 520
 521         ret = omap_bandgap_validate(bg_ptr, id);
 522         if (ret)
 523                 return ret;
 524
 525         if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT))
 526                 return -ENOTSUPP;
 527
 528         tsr = bg_ptr->conf->sensors[id].registers;
 529         temp = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold);
 530         temp = (temp & tsr->threshold_tcold_mask)
 531             >> __ffs(tsr->threshold_tcold_mask);
 532         ret |= adc_to_temp_conversion(bg_ptr, id, temp, &temp);
 533         if (ret)
 534                 return -EIO;
 535
 536         *tcold = temp;
 537
 538         return 0;
 539 }
 540
 541 /**
 542  * omap_bandgap_write_tcold() - sets the sensor tcold
 543  * @bg_ptr - pointer to bandgap instance
 544  * @id - sensor id
 545  * @val - desired tcold value
 546  *
 547  * returns 0 on success or the proper error code
 548  */
 549 int omap_bandgap_write_tcold(struct omap_bandgap *bg_ptr, int id, int val)
 550 {
 551         struct temp_sensor_data *ts_data;
 552         struct temp_sensor_registers *tsr;
 553         u32 t_cold;
 554         int ret;
 555
 556         ret = omap_bandgap_validate(bg_ptr, id);
 557         if (ret)
 558                 return ret;
 559
 560         if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT))
 561                 return -ENOTSUPP;
 562
 563         ts_data = bg_ptr->conf->sensors[id].ts_data;
 564         tsr = bg_ptr->conf->sensors[id].registers;
 565         if (val > ts_data->max_temp + ts_data->hyst_val)
 566                 return -EINVAL;
 567
 568         ret = temp_to_adc_conversion(val, bg_ptr, id, &t_cold);
 569         if (ret < 0)
 570                 return ret;
 571
 572         mutex_lock(&bg_ptr->bg_mutex);
 573         temp_sensor_configure_tcold(bg_ptr, id, t_cold);
 574         mutex_unlock(&bg_ptr->bg_mutex);
 575
 576         return 0;
 577 }
 578
 579 /**
 580  * omap_bandgap_read_update_interval() - read the sensor update interval
 581  * @bg_ptr - pointer to bandgap instance
 582  * @id - sensor id
 583  * @interval - resulting update interval in miliseconds
 584  *
 585  * returns 0 on success or the proper error code
 586  */
 587 int omap_bandgap_read_update_interval(struct omap_bandgap *bg_ptr, int id,
 588                                          int *interval)
 589 {
 590         struct temp_sensor_registers *tsr;
 591         u32 time;
 592         int ret;
 593
 594         ret = omap_bandgap_validate(bg_ptr, id);
 595         if (ret)
 596                 return ret;
 597
 598         if (!OMAP_BANDGAP_HAS(bg_ptr, COUNTER))
 599                 return -ENOTSUPP;
 600
 601         tsr = bg_ptr->conf->sensors[id].registers;
 602         time = omap_bandgap_readl(bg_ptr, tsr->bgap_counter);
 603         time = (time & tsr->counter_mask) >> __ffs(tsr->counter_mask);
 604         time = time * 1000 / bg_ptr->clk_rate;
 605
 606         *interval = time;
 607
 608         return 0;
 609 }
 610
 611 /**
 612  * omap_bandgap_write_update_interval() - set the update interval
 613  * @bg_ptr - pointer to bandgap instance
 614  * @id - sensor id
 615  * @interval - desired update interval in miliseconds
 616  *
 617  * returns 0 on success or the proper error code
 618  */
 619 int omap_bandgap_write_update_interval(struct omap_bandgap *bg_ptr,
 620                                        int id, u32 interval)
 621 {
 622         int ret = omap_bandgap_validate(bg_ptr, id);
 623         if (ret)
 624                 return ret;
 625
 626         if (!OMAP_BANDGAP_HAS(bg_ptr, COUNTER))
 627                 return -ENOTSUPP;
 628
 629         interval = interval * bg_ptr->clk_rate / 1000;
 630         mutex_lock(&bg_ptr->bg_mutex);
 631         configure_temp_sensor_counter(bg_ptr, id, interval);
 632         mutex_unlock(&bg_ptr->bg_mutex);
 633
 634         return 0;
 635 }
 636
 637 /**
 638  * omap_bandgap_read_temperature() - report current temperature
 639  * @bg_ptr - pointer to bandgap instance
 640  * @id - sensor id
 641  * @temperature - resulting temperature
 642  *
 643  * returns 0 on success or the proper error code
 644  */
 645 int omap_bandgap_read_temperature(struct omap_bandgap *bg_ptr, int id,
 646                                   int *temperature)
 647 {
 648         struct temp_sensor_registers *tsr;
 649         u32 temp;
 650         int ret;
 651
 652         ret = omap_bandgap_validate(bg_ptr, id);
 653         if (ret)
 654                 return ret;
 655
 656         tsr = bg_ptr->conf->sensors[id].registers;
 657         mutex_lock(&bg_ptr->bg_mutex);
 658         temp = omap_bandgap_read_temp(bg_ptr, id);
 659         mutex_unlock(&bg_ptr->bg_mutex);
 660
 661         ret |= adc_to_temp_conversion(bg_ptr, id, temp, &temp);
 662         if (ret)
 663                 return -EIO;
 664
 665         *temperature = temp;
 666
 667         return 0;
 668 }
 669
 670 /**
 671  * omap_bandgap_set_sensor_data() - helper function to store thermal
 672  * framework related data.
 673  * @bg_ptr - pointer to bandgap instance
 674  * @id - sensor id
 675  * @data - thermal framework related data to be stored
 676  *
 677  * returns 0 on success or the proper error code
 678  */
 679 int omap_bandgap_set_sensor_data(struct omap_bandgap *bg_ptr, int id,
 680                                  void *data)
 681 {
 682         int ret = omap_bandgap_validate(bg_ptr, id);
 683         if (ret)
 684                 return ret;
 685
 686         bg_ptr->conf->sensors[id].data = data;
 687
 688         return 0;
 689 }
 690
 691 /**
 692  * omap_bandgap_get_sensor_data() - helper function to get thermal
 693  * framework related data.
 694  * @bg_ptr - pointer to bandgap instance
 695  * @id - sensor id
 696  *
 697  * returns data stored by set function with sensor id on success or NULL
 698  */
 699 void *omap_bandgap_get_sensor_data(struct omap_bandgap *bg_ptr, int id)
 700 {
 701         int ret = omap_bandgap_validate(bg_ptr, id);
 702         if (ret)
 703                 return ERR_PTR(ret);
 704
 705         return bg_ptr->conf->sensors[id].data;
 706 }
 707
 708 static int
 709 omap_bandgap_force_single_read(struct omap_bandgap *bg_ptr, int id)
 710 {
 711         struct temp_sensor_registers *tsr;
 712         u32 temp = 0, counter = 1000;
 713
 714         tsr = bg_ptr->conf->sensors[id].registers;
 715         /* Select single conversion mode */
 716         if (OMAP_BANDGAP_HAS(bg_ptr, MODE_CONFIG)) {
 717                 temp = omap_bandgap_readl(bg_ptr, tsr->bgap_mode_ctrl);
 718                 temp &= ~(1 << __ffs(tsr->mode_ctrl_mask));
 719                 omap_bandgap_writel(bg_ptr, temp, tsr->bgap_mode_ctrl);
 720         }
 721
 722         /* Start of Conversion = 1 */
 723         temp = omap_bandgap_readl(bg_ptr, tsr->temp_sensor_ctrl);
 724         temp |= 1 << __ffs(tsr->bgap_soc_mask);
 725         omap_bandgap_writel(bg_ptr, temp, tsr->temp_sensor_ctrl);
 726         /* Wait until DTEMP is updated */
 727         temp = omap_bandgap_read_temp(bg_ptr, id);
 728
 729         while ((temp == 0) && --counter)
 730                 temp = omap_bandgap_read_temp(bg_ptr, id);
 731
 732         /* Start of Conversion = 0 */
 733         temp = omap_bandgap_readl(bg_ptr, tsr->temp_sensor_ctrl);
 734         temp &= ~(1 << __ffs(tsr->bgap_soc_mask));
 735         omap_bandgap_writel(bg_ptr, temp, tsr->temp_sensor_ctrl);
 736
 737         return 0;
 738 }
 739
 740 /**
 741  * enable_continuous_mode() - One time enabling of continuous conversion mode
 742  * @bg_ptr - pointer to scm instance
 743  *
 744  * Call this function only if HAS(MODE_CONFIG) is set
 745  */
 746 static int enable_continuous_mode(struct omap_bandgap *bg_ptr)
 747 {
 748         struct temp_sensor_registers *tsr;
 749         int i;
 750         u32 val;
 751
 752         for (i = 0; i < bg_ptr->conf->sensor_count; i++) {
 753                 /* Perform a single read just before enabling continuous */
 754                 omap_bandgap_force_single_read(bg_ptr, i);
 755                 tsr = bg_ptr->conf->sensors[i].registers;
 756                 val = omap_bandgap_readl(bg_ptr, tsr->bgap_mode_ctrl);
 757                 val |= 1 << __ffs(tsr->mode_ctrl_mask);
 758                 omap_bandgap_writel(bg_ptr, val, tsr->bgap_mode_ctrl);
 759         }
 760
 761         return 0;
 762 }
 763
 764 static int omap_bandgap_tshut_init(struct omap_bandgap *bg_ptr,
 765                                    struct platform_device *pdev)
 766 {
 767         int gpio_nr = bg_ptr->tshut_gpio;
 768         int status;
 769
 770         /* Request for gpio_86 line */
 771         status = gpio_request(gpio_nr, "tshut");
 772         if (status < 0) {
 773                 dev_err(bg_ptr->dev,
 774                         "Could not request for TSHUT GPIO:%i\n", 86);
 775                 return status;
 776         }
 777         status = gpio_direction_input(gpio_nr);
 778         if (status) {
 779                 dev_err(bg_ptr->dev,
 780                         "Cannot set input TSHUT GPIO %d\n", gpio_nr);
 781                 return status;
 782         }
 783
 784         status = request_irq(gpio_to_irq(gpio_nr),
 785                              omap_bandgap_tshut_irq_handler,
 786                              IRQF_TRIGGER_RISING, "tshut",
 787                              NULL);
 788         if (status) {
 789                 gpio_free(gpio_nr);
 790                 dev_err(bg_ptr->dev, "request irq failed for TSHUT");
 791         }
 792
 793         return 0;
 794 }
 795
 796 /* Initialization of Talert. Call it only if HAS(TALERT) is set */
 797 static int omap_bandgap_talert_init(struct omap_bandgap *bg_ptr,
 798                                     struct platform_device *pdev)
 799 {
 800         int ret;
 801
 802         bg_ptr->irq = platform_get_irq(pdev, 0);
 803         if (bg_ptr->irq < 0) {
 804                 dev_err(&pdev->dev, "get_irq failed\n");
 805                 return bg_ptr->irq;
 806         }
 807         ret = request_threaded_irq(bg_ptr->irq, NULL,
 808                                    talert_irq_handler,
 809                                    IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
 810                                    "talert", bg_ptr);
 811         if (ret) {
 812                 dev_err(&pdev->dev, "Request threaded irq failed.\n");
 813                 return ret;
 814         }
 815
 816         return 0;
 817 }
 818
 819 static const struct of_device_id of_omap_bandgap_match[];
 820 static struct omap_bandgap *omap_bandgap_build(struct platform_device *pdev)
 821 {
 822         struct device_node *node = pdev->dev.of_node;
 823         const struct of_device_id *of_id;
 824         struct omap_bandgap *bg_ptr;
 825         struct resource *res;
 826         u32 prop;
 827         int i;
 828
 829         /* just for the sake */
 830         if (!node) {
 831                 dev_err(&pdev->dev, "no platform information available\n");
 832                 return ERR_PTR(-EINVAL);
 833         }
 834
 835         bg_ptr = devm_kzalloc(&pdev->dev, sizeof(struct omap_bandgap),
 836                                     GFP_KERNEL);
 837         if (!bg_ptr) {
 838                 dev_err(&pdev->dev, "Unable to allocate mem for driver ref\n");
 839                 return ERR_PTR(-ENOMEM);
 840         }
 841
 842         of_id = of_match_device(of_omap_bandgap_match, &pdev->dev);
 843         if (of_id)
 844                 bg_ptr->conf = of_id->data;
 845
 846         i = 0;
 847         do {
 848                 void __iomem *chunk;
 849
 850                 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
 851                 if (!res)
 852                         break;
 853                 chunk = devm_ioremap_resource(&pdev->dev, res);
 854                 if (i == 0)
 855                         bg_ptr->base = chunk;
 856                 if (IS_ERR(chunk))
 857                         return ERR_CAST(chunk);
 858
 859                 i++;
 860         } while (res);
 861
 862         if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT)) {
 863                 if (of_property_read_u32(node, "ti,tshut-gpio", &prop) < 0) {
 864                         dev_err(&pdev->dev, "missing tshut gpio in device tree\n");
 865                         return ERR_PTR(-EINVAL);
 866                 }
 867                 bg_ptr->tshut_gpio = prop;
 868                 if (!gpio_is_valid(bg_ptr->tshut_gpio)) {
 869                         dev_err(&pdev->dev, "invalid gpio for tshut (%d)\n",
 870                                 bg_ptr->tshut_gpio);
 871                         return ERR_PTR(-EINVAL);
 872                 }
 873         }
 874
 875         return bg_ptr;
 876 }
 877
 878 static
 879 int omap_bandgap_probe(struct platform_device *pdev)
 880 {
 881         struct omap_bandgap *bg_ptr;
 882         int clk_rate, ret = 0, i;
 883
 884         bg_ptr = omap_bandgap_build(pdev);
 885         if (IS_ERR_OR_NULL(bg_ptr)) {
 886                 dev_err(&pdev->dev, "failed to fetch platform data\n");
 887                 return PTR_ERR(bg_ptr);
 888         }
 889         bg_ptr->dev = &pdev->dev;
 890
 891         if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT)) {
 892                 ret = omap_bandgap_tshut_init(bg_ptr, pdev);
 893                 if (ret) {
 894                         dev_err(&pdev->dev,
 895                                 "failed to initialize system tshut IRQ\n");
 896                         return ret;
 897                 }
 898         }
 899
 900         bg_ptr->fclock = clk_get(NULL, bg_ptr->conf->fclock_name);
 901         ret = IS_ERR_OR_NULL(bg_ptr->fclock);
 902         if (ret) {
 903                 dev_err(&pdev->dev, "failed to request fclock reference\n");
 904                 goto free_irqs;
 905         }
 906
 907         bg_ptr->div_clk = clk_get(NULL,  bg_ptr->conf->div_ck_name);
 908         ret = IS_ERR_OR_NULL(bg_ptr->div_clk);
 909         if (ret) {
 910                 dev_err(&pdev->dev,
 911                         "failed to request div_ts_ck clock ref\n");
 912                 goto free_irqs;
 913         }
 914
 915         for (i = 0; i < bg_ptr->conf->sensor_count; i++) {
 916                 struct temp_sensor_registers *tsr;
 917                 u32 val;
 918
 919                 tsr = bg_ptr->conf->sensors[i].registers;
 920                 /*
 921                  * check if the efuse has a non-zero value if not
 922                  * it is an untrimmed sample and the temperatures
 923                  * may not be accurate
 924                  */
 925                 val = omap_bandgap_readl(bg_ptr, tsr->bgap_efuse);
 926                 if (ret || !val)
 927                         dev_info(&pdev->dev,
 928                                  "Non-trimmed BGAP, Temp not accurate\n");
 929         }
 930
 931         clk_rate = clk_round_rate(bg_ptr->div_clk,
 932                                   bg_ptr->conf->sensors[0].ts_data->max_freq);
 933         if (clk_rate < bg_ptr->conf->sensors[0].ts_data->min_freq ||
 934             clk_rate == 0xffffffff) {
 935                 ret = -ENODEV;
 936                 dev_err(&pdev->dev, "wrong clock rate (%d)\n", clk_rate);
 937                 goto put_clks;
 938         }
 939
 940         ret = clk_set_rate(bg_ptr->div_clk, clk_rate);
 941         if (ret)
 942                 dev_err(&pdev->dev, "Cannot re-set clock rate. Continuing\n");
 943
 944         bg_ptr->clk_rate = clk_rate;
 945         if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL))
 946                 clk_prepare_enable(bg_ptr->fclock);
 947
 948
 949         mutex_init(&bg_ptr->bg_mutex);
 950         bg_ptr->dev = &pdev->dev;
 951         platform_set_drvdata(pdev, bg_ptr);
 952
 953         omap_bandgap_power(bg_ptr, true);
 954
 955         /* Set default counter to 1 for now */
 956         if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER))
 957                 for (i = 0; i < bg_ptr->conf->sensor_count; i++)
 958                         configure_temp_sensor_counter(bg_ptr, i, 1);
 959
 960         for (i = 0; i < bg_ptr->conf->sensor_count; i++) {
 961                 struct temp_sensor_data *ts_data;
 962
 963                 ts_data = bg_ptr->conf->sensors[i].ts_data;
 964
 965                 if (OMAP_BANDGAP_HAS(bg_ptr, TALERT))
 966                         temp_sensor_init_talert_thresholds(bg_ptr, i,
 967                                                            ts_data->t_hot,
 968                                                            ts_data->t_cold);
 969                 if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT_CONFIG)) {
 970                         temp_sensor_configure_tshut_hot(bg_ptr, i,
 971                                                         ts_data->tshut_hot);
 972                         temp_sensor_configure_tshut_cold(bg_ptr, i,
 973                                                          ts_data->tshut_cold);
 974                 }
 975         }
 976
 977         if (OMAP_BANDGAP_HAS(bg_ptr, MODE_CONFIG))
 978                 enable_continuous_mode(bg_ptr);
 979
 980         /* Set .250 seconds time as default counter */
 981         if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER))
 982                 for (i = 0; i < bg_ptr->conf->sensor_count; i++)
 983                         configure_temp_sensor_counter(bg_ptr, i,
 984                                                       bg_ptr->clk_rate / 4);
 985
 986         /* Every thing is good? Then expose the sensors */
 987         for (i = 0; i < bg_ptr->conf->sensor_count; i++) {
 988                 char *domain;
 989
 990                 if (bg_ptr->conf->sensors[i].register_cooling)
 991                         bg_ptr->conf->sensors[i].register_cooling(bg_ptr, i);
 992
 993                 domain = bg_ptr->conf->sensors[i].domain;
 994                 if (bg_ptr->conf->expose_sensor)
 995                         bg_ptr->conf->expose_sensor(bg_ptr, i, domain);
 996         }
 997
 998         /*
 999          * Enable the Interrupts once everything is set. Otherwise irq handler
1000          * might be called as soon as it is enabled where as rest of framework
1001          * is still getting initialised.
1002          */
1003         if (OMAP_BANDGAP_HAS(bg_ptr, TALERT)) {
1004                 ret = omap_bandgap_talert_init(bg_ptr, pdev);
1005                 if (ret) {
1006                         dev_err(&pdev->dev, "failed to initialize Talert IRQ\n");
1007                         i = bg_ptr->conf->sensor_count;
1008                         goto disable_clk;
1009                 }
1010         }
1011
1012         return 0;
1013
1014 disable_clk:
1015         if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL))
1016                 clk_disable_unprepare(bg_ptr->fclock);
1017 put_clks:
1018         clk_put(bg_ptr->fclock);
1019         clk_put(bg_ptr->div_clk);
1020 free_irqs:
1021         if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT)) {
1022                 free_irq(gpio_to_irq(bg_ptr->tshut_gpio), NULL);
1023                 gpio_free(bg_ptr->tshut_gpio);
1024         }
1025
1026         return ret;
1027 }
1028
1029 static
1030 int omap_bandgap_remove(struct platform_device *pdev)
1031 {
1032         struct omap_bandgap *bg_ptr = platform_get_drvdata(pdev);
1033         int i;
1034
1035         /* First thing is to remove sensor interfaces */
1036         for (i = 0; i < bg_ptr->conf->sensor_count; i++) {
1037                 if (bg_ptr->conf->sensors[i].register_cooling)
1038                         bg_ptr->conf->sensors[i].unregister_cooling(bg_ptr, i);
1039
1040                 if (bg_ptr->conf->remove_sensor)
1041                         bg_ptr->conf->remove_sensor(bg_ptr, i);
1042         }
1043
1044         omap_bandgap_power(bg_ptr, false);
1045
1046         if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL))
1047                 clk_disable_unprepare(bg_ptr->fclock);
1048         clk_put(bg_ptr->fclock);
1049         clk_put(bg_ptr->div_clk);
1050
1051         if (OMAP_BANDGAP_HAS(bg_ptr, TALERT))
1052                 free_irq(bg_ptr->irq, bg_ptr);
1053
1054         if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT)) {
1055                 free_irq(gpio_to_irq(bg_ptr->tshut_gpio), NULL);
1056                 gpio_free(bg_ptr->tshut_gpio);
1057         }
1058
1059         return 0;
1060 }
1061
1062 #ifdef CONFIG_PM
1063 static int omap_bandgap_save_ctxt(struct omap_bandgap *bg_ptr)
1064 {
1065         int i;
1066
1067         for (i = 0; i < bg_ptr->conf->sensor_count; i++) {
1068                 struct temp_sensor_registers *tsr;
1069                 struct temp_sensor_regval *rval;
1070
1071                 rval = &bg_ptr->conf->sensors[i].regval;
1072                 tsr = bg_ptr->conf->sensors[i].registers;
1073
1074                 if (OMAP_BANDGAP_HAS(bg_ptr, MODE_CONFIG))
1075                         rval->bg_mode_ctrl = omap_bandgap_readl(bg_ptr,
1076                                                         tsr->bgap_mode_ctrl);
1077                 if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER))
1078                         rval->bg_counter = omap_bandgap_readl(bg_ptr,
1079                                                         tsr->bgap_counter);
1080                 if (OMAP_BANDGAP_HAS(bg_ptr, TALERT)) {
1081                         rval->bg_threshold = omap_bandgap_readl(bg_ptr,
1082                                                         tsr->bgap_threshold);
1083                         rval->bg_ctrl = omap_bandgap_readl(bg_ptr,
1084                                                    tsr->bgap_mask_ctrl);
1085                 }
1086
1087                 if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT_CONFIG))
1088                         rval->tshut_threshold = omap_bandgap_readl(bg_ptr,
1089                                                    tsr->tshut_threshold);
1090         }
1091
1092         return 0;
1093 }
1094
1095 static int omap_bandgap_restore_ctxt(struct omap_bandgap *bg_ptr)
1096 {
1097         int i;
1098
1099         for (i = 0; i < bg_ptr->conf->sensor_count; i++) {
1100                 struct temp_sensor_registers *tsr;
1101                 struct temp_sensor_regval *rval;
1102                 u32 val = 0;
1103
1104                 rval = &bg_ptr->conf->sensors[i].regval;
1105                 tsr = bg_ptr->conf->sensors[i].registers;
1106
1107                 if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER))
1108                         val = omap_bandgap_readl(bg_ptr, tsr->bgap_counter);
1109
1110                 if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT_CONFIG))
1111                         omap_bandgap_writel(bg_ptr, rval->tshut_threshold,
1112                                             tsr->tshut_threshold);
1113                 /* Force immediate temperature measurement and update
1114                  * of the DTEMP field
1115                  */
1116                 omap_bandgap_force_single_read(bg_ptr, i);
1117
1118                 if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER))
1119                         omap_bandgap_writel(bg_ptr, rval->bg_counter,
1120                                             tsr->bgap_counter);
1121                 if (OMAP_BANDGAP_HAS(bg_ptr, MODE_CONFIG))
1122                         omap_bandgap_writel(bg_ptr, rval->bg_mode_ctrl,
1123                                             tsr->bgap_mode_ctrl);
1124                 if (OMAP_BANDGAP_HAS(bg_ptr, TALERT)) {
1125                         omap_bandgap_writel(bg_ptr, rval->bg_threshold,
1126                                             tsr->bgap_threshold);
1127                         omap_bandgap_writel(bg_ptr, rval->bg_ctrl,
1128                                             tsr->bgap_mask_ctrl);
1129                 }
1130         }
1131
1132         return 0;
1133 }
1134
1135 static int omap_bandgap_suspend(struct device *dev)
1136 {
1137         struct omap_bandgap *bg_ptr = dev_get_drvdata(dev);
1138         int err;
1139
1140         err = omap_bandgap_save_ctxt(bg_ptr);
1141         omap_bandgap_power(bg_ptr, false);
1142
1143         if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL))
1144                 clk_disable_unprepare(bg_ptr->fclock);
1145
1146         return err;
1147 }
1148
1149 static int omap_bandgap_resume(struct device *dev)
1150 {
1151         struct omap_bandgap *bg_ptr = dev_get_drvdata(dev);
1152
1153         if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL))
1154                 clk_prepare_enable(bg_ptr->fclock);
1155
1156         omap_bandgap_power(bg_ptr, true);
1157
1158         return omap_bandgap_restore_ctxt(bg_ptr);
1159 }
1160 static const struct dev_pm_ops omap_bandgap_dev_pm_ops = {
1161         SET_SYSTEM_SLEEP_PM_OPS(omap_bandgap_suspend,
1162                                 omap_bandgap_resume)
1163 };
1164
1165 #define DEV_PM_OPS      (&omap_bandgap_dev_pm_ops)
1166 #else
1167 #define DEV_PM_OPS      NULL
1168 #endif
1169
1170 static const struct of_device_id of_omap_bandgap_match[] = {
1171 #ifdef CONFIG_OMAP4_THERMAL
1172         {
1173                 .compatible = "ti,omap4430-bandgap",
1174                 .data = (void *)&omap4430_data,
1175         },
1176         {
1177                 .compatible = "ti,omap4460-bandgap",
1178                 .data = (void *)&omap4460_data,
1179         },
1180         {
1181                 .compatible = "ti,omap4470-bandgap",
1182                 .data = (void *)&omap4470_data,
1183         },
1184 #endif
1185 #ifdef CONFIG_OMAP5_THERMAL
1186         {
1187                 .compatible = "ti,omap5430-bandgap",
1188                 .data = (void *)&omap5430_data,
1189         },
1190 #endif
1191         /* Sentinel */
1192         { },
1193 };
1194 MODULE_DEVICE_TABLE(of, of_omap_bandgap_match);
1195
1196 static struct platform_driver omap_bandgap_sensor_driver = {
1197         .probe = omap_bandgap_probe,
1198         .remove = omap_bandgap_remove,
1199         .driver = {
1200                         .name = "omap-bandgap",
1201                         .pm = DEV_PM_OPS,
1202                         .of_match_table = of_omap_bandgap_match,
1203         },
1204 };
1205
1206 module_platform_driver(omap_bandgap_sensor_driver);
1207
1208 MODULE_DESCRIPTION("OMAP4+ bandgap temperature sensor driver");
1209 MODULE_LICENSE("GPL v2");
1210 MODULE_ALIAS("platform:omap-bandgap");
1211 MODULE_AUTHOR("Texas Instrument Inc.");