arch/arm/mach-rockchip/dvfs.c

   1 /* arch/arm/mach-rk30/rk30_dvfs.c
   2  *
   3  * Copyright (C) 2012 ROCKCHIP, Inc.
   4  *
   5  * This software is licensed under the terms of the GNU General Public
   6  * License version 2, as published by the Free Software Foundation, and
   7  * may be copied, distributed, and modified under those terms.
   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  */
  15 #include <linux/slab.h>
  16 #include <linux/clk.h>
  17 #include <linux/regulator/consumer.h>
  18 #include <linux/delay.h>
  19 #include <linux/stat.h>
  20 #include <linux/of.h>
  21 #include <linux/opp.h>
  22 #include <linux/rockchip/dvfs.h>
  23 #include <linux/rockchip/common.h>
  24
  25 extern int rockchip_tsadc_get_temp(int chn);
  26
  27 #define MHz     (1000 * 1000)
  28 static LIST_HEAD(rk_dvfs_tree);
  29 static DEFINE_MUTEX(rk_dvfs_mutex);
  30 static struct workqueue_struct *dvfs_wq;
  31 static struct dvfs_node *clk_cpu_dvfs_node;
  32 static unsigned int target_temp = 80;
  33 static int temp_limit_enable = 1;
  34
  35 static void dvfs_volt_up_delay(struct vd_node *vd, int new_volt, int old_volt)
  36 {
  37         int u_time;
  38
  39         if(new_volt <= old_volt)
  40                 return;
  41         if(vd->volt_time_flag > 0)
  42                 u_time = regulator_set_voltage_time(vd->regulator, old_volt, new_volt);
  43         else
  44                 u_time = -1;
  45         if(u_time < 0) {// regulator is not suported time,useing default time
  46                 DVFS_DBG("%s:vd %s is not suported getting delay time,so we use default\n",
  47                                 __func__, vd->name);
  48                 u_time = ((new_volt) - (old_volt)) >> 9;
  49         }
  50
  51         DVFS_DBG("%s: vd %s volt %d to %d delay %d us\n",
  52                 __func__, vd->name, old_volt, new_volt, u_time);
  53
  54         if (u_time >= 1000) {
  55                 mdelay(u_time / 1000);
  56                 udelay(u_time % 1000);
  57                 DVFS_WARNING("%s: regulator set vol delay is larger 1ms,old is %d,new is %d\n",
  58                         __func__, old_volt, new_volt);
  59         } else if (u_time) {
  60                 udelay(u_time);
  61         }
  62 }
  63
  64 static int dvfs_regulator_set_voltage_readback(struct regulator *regulator, int min_uV, int max_uV)
  65 {
  66         int ret = 0, read_back = 0;
  67
  68         ret = dvfs_regulator_set_voltage(regulator, max_uV, max_uV);
  69         if (ret < 0) {
  70                 DVFS_ERR("%s: now read back to check voltage\n", __func__);
  71
  72                 /* read back to judge if it is already effect */
  73                 mdelay(2);
  74                 read_back = dvfs_regulator_get_voltage(regulator);
  75                 if (read_back == max_uV) {
  76                         DVFS_ERR("%s: set ERROR but already effected, volt=%d\n", __func__, read_back);
  77                         ret = 0;
  78                 } else {
  79                         DVFS_ERR("%s: set ERROR AND NOT effected, volt=%d\n", __func__, read_back);
  80                 }
  81         }
  82
  83         return ret;
  84 }
  85
  86 static int dvfs_scale_volt_direct(struct vd_node *vd_clk, int volt_new)
  87 {
  88         int ret = 0;
  89
  90         DVFS_DBG("%s: volt=%d(old=%d)\n", __func__, volt_new, vd_clk->cur_volt);
  91
  92         if (IS_ERR_OR_NULL(vd_clk)) {
  93                 DVFS_ERR("%s: vd_node error\n", __func__);
  94                 return -EINVAL;
  95         }
  96
  97         if (!IS_ERR_OR_NULL(vd_clk->regulator)) {
  98                 ret = dvfs_regulator_set_voltage_readback(vd_clk->regulator, volt_new, volt_new);
  99                 dvfs_volt_up_delay(vd_clk,volt_new, vd_clk->cur_volt);
 100                 if (ret < 0) {
 101                         vd_clk->volt_set_flag = DVFS_SET_VOLT_FAILURE;
 102                         DVFS_ERR("%s: %s set voltage up err ret = %d, Vnew = %d(was %d)mV\n",
 103                                         __func__, vd_clk->name, ret, volt_new, vd_clk->cur_volt);
 104                         return -EAGAIN;
 105                 }
 106
 107         } else {
 108                 DVFS_ERR("%s: invalid regulator\n", __func__);
 109                 return -EINVAL;
 110         }
 111
 112         vd_clk->volt_set_flag = DVFS_SET_VOLT_SUCCESS;
 113         vd_clk->cur_volt = volt_new;
 114
 115         return 0;
 116
 117 }
 118
 119 static int dvfs_reset_volt(struct vd_node *dvfs_vd)
 120 {
 121         int flag_set_volt_correct = 0;
 122         if (!IS_ERR_OR_NULL(dvfs_vd->regulator))
 123                 flag_set_volt_correct = dvfs_regulator_get_voltage(dvfs_vd->regulator);
 124         else {
 125                 DVFS_ERR("%s: invalid regulator\n", __func__);
 126                 return -EINVAL;
 127         }
 128         if (flag_set_volt_correct <= 0) {
 129                 DVFS_ERR("%s (vd:%s), try to reload volt ,by it is error again(%d)!!! stop scaling\n",
 130                                 __func__, dvfs_vd->name, flag_set_volt_correct);
 131                 return -EAGAIN;
 132         }
 133         dvfs_vd->volt_set_flag = DVFS_SET_VOLT_SUCCESS;
 134         DVFS_WARNING("%s:vd(%s) try to reload volt = %d\n",
 135                         __func__, dvfs_vd->name, flag_set_volt_correct);
 136
 137         /* Reset vd's voltage */
 138         dvfs_vd->cur_volt = flag_set_volt_correct;
 139
 140         return dvfs_vd->cur_volt;
 141 }
 142
 143
 144 // for clk enable case to get vd regulator info
 145 static void clk_enable_dvfs_regulator_check(struct vd_node *vd)
 146 {
 147         vd->cur_volt = dvfs_regulator_get_voltage(vd->regulator);
 148         if(vd->cur_volt <= 0){
 149                 vd->volt_set_flag = DVFS_SET_VOLT_FAILURE;
 150         }
 151         vd->volt_set_flag = DVFS_SET_VOLT_SUCCESS;
 152 }
 153
 154 static void dvfs_get_vd_regulator_volt_list(struct vd_node *vd)
 155 {
 156         unsigned int i, selector = dvfs_regulator_count_voltages(vd->regulator);
 157         int n = 0, sel_volt = 0;
 158
 159         if(selector > VD_VOL_LIST_CNT)
 160                 selector = VD_VOL_LIST_CNT;
 161
 162         for (i = 0; i < selector; i++) {
 163                 sel_volt = dvfs_regulator_list_voltage(vd->regulator, i);
 164                 if(sel_volt <= 0){
 165                         //DVFS_WARNING("%s: vd(%s) list volt selector=%u, but volt(%d) <=0\n",
 166                         //      __func__, vd->name, i, sel_volt);
 167                         continue;
 168                 }
 169                 vd->volt_list[n++] = sel_volt;
 170                 DVFS_DBG("%s: vd(%s) list volt selector=%u, n=%d, volt=%d\n",
 171                         __func__, vd->name, i, n, sel_volt);
 172         }
 173
 174         vd->n_voltages = n;
 175 }
 176
 177 // >= volt
 178 static int vd_regulator_round_volt_max(struct vd_node *vd, int volt)
 179 {
 180         int sel_volt;
 181         int i;
 182
 183         for (i = 0; i < vd->n_voltages; i++) {
 184                 sel_volt = vd->volt_list[i];
 185                 if(sel_volt <= 0){
 186                         DVFS_WARNING("%s: selector=%u, but volt <=0\n",
 187                                 __func__, i);
 188                         continue;
 189                 }
 190                 if(sel_volt >= volt)
 191                         return sel_volt;
 192         }
 193         return -EINVAL;
 194 }
 195
 196 // >=volt
 197 static int vd_regulator_round_volt_min(struct vd_node *vd, int volt)
 198 {
 199         int sel_volt;
 200         int i;
 201
 202         for (i = 0; i < vd->n_voltages; i++) {
 203                 sel_volt = vd->volt_list[i];
 204                 if(sel_volt <= 0){
 205                         DVFS_WARNING("%s: selector=%u, but volt <=0\n",
 206                                 __func__, i);
 207                         continue;
 208                 }
 209                 if(sel_volt > volt){
 210                         if(i > 0)
 211                                 return vd->volt_list[i-1];
 212                         else
 213                                 return -EINVAL;
 214                 }
 215         }
 216
 217         return -EINVAL;
 218 }
 219
 220 // >=volt
 221 static int vd_regulator_round_volt(struct vd_node *vd, int volt, int flags)
 222 {
 223         if(!vd->n_voltages)
 224                 return -EINVAL;
 225         if(flags == VD_LIST_RELATION_L)
 226                 return vd_regulator_round_volt_min(vd, volt);
 227         else
 228                 return vd_regulator_round_volt_max(vd, volt);
 229 }
 230
 231 static void dvfs_table_round_volt(struct dvfs_node *clk_dvfs_node)
 232 {
 233         int i, test_volt;
 234
 235         if(!clk_dvfs_node->dvfs_table || !clk_dvfs_node->vd ||
 236                 IS_ERR_OR_NULL(clk_dvfs_node->vd->regulator))
 237                 return;
 238
 239         for (i = 0; (clk_dvfs_node->dvfs_table[i].frequency != CPUFREQ_TABLE_END); i++) {
 240
 241                 test_volt = vd_regulator_round_volt(clk_dvfs_node->vd, clk_dvfs_node->dvfs_table[i].index, VD_LIST_RELATION_H);
 242                 if(test_volt <= 0)
 243                 {
 244                         DVFS_WARNING("%s: clk(%s) round volt(%d) but list <=0\n",
 245                                 __func__, clk_dvfs_node->name, clk_dvfs_node->dvfs_table[i].index);
 246                         break;
 247                 }
 248                 DVFS_DBG("clk %s:round_volt %d to %d\n",
 249                         clk_dvfs_node->name, clk_dvfs_node->dvfs_table[i].index, test_volt);
 250
 251                 clk_dvfs_node->dvfs_table[i].index=test_volt;
 252         }
 253 }
 254
 255 static void dvfs_vd_get_regulator_volt_time_info(struct vd_node *vd)
 256 {
 257         if(vd->volt_time_flag <= 0){// check regulator support get uping vol timer
 258                 vd->volt_time_flag = dvfs_regulator_set_voltage_time(vd->regulator, vd->cur_volt, vd->cur_volt+200*1000);
 259                 if(vd->volt_time_flag < 0){
 260                         DVFS_DBG("%s,vd %s volt_time is no support\n",
 261                                 __func__, vd->name);
 262                 }
 263                 else{
 264                         DVFS_DBG("%s,vd %s volt_time is support,up 200mv need delay %d us\n",
 265                                 __func__, vd->name, vd->volt_time_flag);
 266                 }
 267         }
 268 }
 269 #if 0
 270 static void dvfs_vd_get_regulator_mode_info(struct vd_node *vd)
 271 {
 272         //REGULATOR_MODE_FAST
 273         if(vd->mode_flag <= 0){// check regulator support get uping vol timer{
 274                 vd->mode_flag = dvfs_regulator_get_mode(vd->regulator);
 275                 if(vd->mode_flag==REGULATOR_MODE_FAST || vd->mode_flag==REGULATOR_MODE_NORMAL
 276                         || vd->mode_flag == REGULATOR_MODE_IDLE || vd->mode_flag==REGULATOR_MODE_STANDBY){
 277
 278                         if(dvfs_regulator_set_mode(vd->regulator, vd->mode_flag) < 0){
 279                                 vd->mode_flag = 0;// check again
 280                         }
 281                 }
 282                 if(vd->mode_flag > 0){
 283                         DVFS_DBG("%s,vd %s mode(now is %d) support\n",
 284                                 __func__, vd->name, vd->mode_flag);
 285                 }
 286                 else{
 287                         DVFS_DBG("%s,vd %s mode is not support now check\n",
 288                                 __func__, vd->name);
 289                 }
 290         }
 291 }
 292 #endif
 293
 294 struct regulator *dvfs_get_regulator(char *regulator_name)
 295 {
 296         struct vd_node *vd;
 297
 298         mutex_lock(&rk_dvfs_mutex);
 299         list_for_each_entry(vd, &rk_dvfs_tree, node) {
 300                 if (strcmp(regulator_name, vd->regulator_name) == 0) {
 301                         mutex_unlock(&rk_dvfs_mutex);
 302                         return vd->regulator;
 303                 }
 304         }
 305         mutex_unlock(&rk_dvfs_mutex);
 306         return NULL;
 307 }
 308
 309 static int dvfs_get_rate_range(struct dvfs_node *clk_dvfs_node)
 310 {
 311         struct cpufreq_frequency_table *table;
 312         int i = 0;
 313
 314         if (!clk_dvfs_node)
 315                 return -1;
 316
 317         clk_dvfs_node->min_rate = 0;
 318         clk_dvfs_node->max_rate = 0;
 319
 320         table = clk_dvfs_node->dvfs_table;
 321         for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
 322                 clk_dvfs_node->max_rate = table[i].frequency / 1000 * 1000 * 1000;
 323                 if (i == 0)
 324                         clk_dvfs_node->min_rate = table[i].frequency / 1000 * 1000 * 1000;
 325         }
 326
 327         DVFS_DBG("%s: clk %s, limit rate [min, max] = [%u, %u]\n",
 328                         __func__, clk_dvfs_node->name, clk_dvfs_node->min_rate, clk_dvfs_node->max_rate);
 329
 330         return 0;
 331 }
 332
 333 static void dvfs_table_round_clk_rate(struct dvfs_node  *clk_dvfs_node)
 334 {
 335         int i, rate, temp_rate, flags;
 336
 337         if(!clk_dvfs_node || !clk_dvfs_node->dvfs_table || !clk_dvfs_node->clk)
 338                 return;
 339
 340         for (i = 0; (clk_dvfs_node->dvfs_table[i].frequency != CPUFREQ_TABLE_END); i++) {
 341                 //ddr rate = real rate+flags
 342                 flags = clk_dvfs_node->dvfs_table[i].frequency%1000;
 343                 rate = (clk_dvfs_node->dvfs_table[i].frequency/1000)*1000;
 344                 temp_rate = clk_round_rate(clk_dvfs_node->clk, rate*1000);
 345                 if(temp_rate <= 0){
 346                         DVFS_WARNING("%s: clk(%s) rate %d round return %d\n",
 347                                 __func__, clk_dvfs_node->name, clk_dvfs_node->dvfs_table[i].frequency, temp_rate);
 348                         continue;
 349                 }
 350
 351                 /* Set rate unit as MHZ */
 352                 if (temp_rate % MHz != 0)
 353                         temp_rate = (temp_rate / MHz + 1) * MHz;
 354
 355                 temp_rate = (temp_rate / 1000) + flags;
 356
 357                 DVFS_DBG("clk %s round_clk_rate %d to %d\n",
 358                         clk_dvfs_node->name,clk_dvfs_node->dvfs_table[i].frequency, temp_rate);
 359
 360                 clk_dvfs_node->dvfs_table[i].frequency = temp_rate;
 361         }
 362 }
 363
 364 static int clk_dvfs_node_get_ref_volt(struct dvfs_node *clk_dvfs_node, int rate_khz,
 365                 struct cpufreq_frequency_table *clk_fv)
 366 {
 367         int i = 0;
 368
 369         if (rate_khz == 0 || !clk_dvfs_node || !clk_dvfs_node->dvfs_table) {
 370                 /* since no need */
 371                 return -EINVAL;
 372         }
 373         clk_fv->frequency = rate_khz;
 374         clk_fv->index = 0;
 375
 376         for (i = 0; (clk_dvfs_node->dvfs_table[i].frequency != CPUFREQ_TABLE_END); i++) {
 377                 if (clk_dvfs_node->dvfs_table[i].frequency >= rate_khz) {
 378                         clk_fv->frequency = clk_dvfs_node->dvfs_table[i].frequency;
 379                         clk_fv->index = clk_dvfs_node->dvfs_table[i].index;
 380                          //printk("%s,%s rate=%ukhz(vol=%d)\n",__func__,clk_dvfs_node->name,
 381                          //clk_fv->frequency, clk_fv->index);
 382                         return 0;
 383                 }
 384         }
 385         clk_fv->frequency = 0;
 386         clk_fv->index = 0;
 387         //DVFS_DBG("%s get corresponding voltage error! out of bound\n", clk_dvfs_node->name);
 388         return -1;
 389 }
 390
 391 static int dvfs_pd_get_newvolt_byclk(struct pd_node *pd, struct dvfs_node *clk_dvfs_node)
 392 {
 393         int volt_max = 0;
 394
 395         if (!pd || !clk_dvfs_node)
 396                 return 0;
 397
 398         if (clk_dvfs_node->set_volt >= pd->cur_volt) {
 399                 return clk_dvfs_node->set_volt;
 400         }
 401
 402         list_for_each_entry(clk_dvfs_node, &pd->clk_list, node) {
 403                 // DVFS_DBG("%s ,pd(%s),dvfs(%s),volt(%u)\n",__func__,pd->name,
 404                 // clk_dvfs_node->name,clk_dvfs_node->set_volt);
 405                 volt_max = max(volt_max, clk_dvfs_node->set_volt);
 406         }
 407         return volt_max;
 408 }
 409
 410 static void dvfs_update_clk_pds_volt(struct dvfs_node *clk_dvfs_node)
 411 {
 412         struct pd_node *pd;
 413
 414         if (!clk_dvfs_node)
 415                 return;
 416
 417         pd = clk_dvfs_node->pd;
 418         if (!pd)
 419                 return ;
 420
 421         pd->cur_volt = dvfs_pd_get_newvolt_byclk(pd, clk_dvfs_node);
 422 }
 423
 424 static int dvfs_vd_get_newvolt_bypd(struct vd_node *vd)
 425 {
 426         int volt_max_vd = 0;
 427         struct pd_node *pd;
 428         //struct depend_list    *depend;
 429
 430         if (!vd)
 431                 return -EINVAL;
 432
 433         list_for_each_entry(pd, &vd->pd_list, node) {
 434                 // DVFS_DBG("%s pd(%s,%u)\n",__func__,pd->name,pd->cur_volt);
 435                 volt_max_vd = max(volt_max_vd, pd->cur_volt);
 436         }
 437
 438         /* some clks depend on this voltage domain */
 439 /*      if (!list_empty(&vd->req_volt_list)) {
 440                 list_for_each_entry(depend, &vd->req_volt_list, node2vd) {
 441                         volt_max_vd = max(volt_max_vd, depend->req_volt);
 442                 }
 443         }*/
 444         return volt_max_vd;
 445 }
 446
 447 static int dvfs_vd_get_newvolt_byclk(struct dvfs_node *clk_dvfs_node)
 448 {
 449         if (!clk_dvfs_node)
 450                 return -1;
 451         dvfs_update_clk_pds_volt(clk_dvfs_node);
 452         return  dvfs_vd_get_newvolt_bypd(clk_dvfs_node->vd);
 453 }
 454 #if 0
 455 static void dvfs_temp_limit_work_func(struct work_struct *work)
 456 {
 457         unsigned long delay = HZ / 10; // 100ms
 458         struct vd_node *vd;
 459         struct pd_node *pd;
 460         struct dvfs_node *clk_dvfs_node;
 461
 462         queue_delayed_work_on(0, dvfs_wq, to_delayed_work(work), delay);
 463
 464         mutex_lock(&rk_dvfs_mutex);
 465         list_for_each_entry(vd, &rk_dvfs_tree, node) {
 466                 mutex_lock(&vd->mutex);
 467                 list_for_each_entry(pd, &vd->pd_list, node) {
 468                         list_for_each_entry(clk_dvfs_node, &pd->clk_list, node) {
 469                                 if (clk_dvfs_node->temp_limit_table) {
 470                                         clk_dvfs_node->temp = rockchip_tsadc_get_temp(clk_dvfs_node->temp_channel);
 471                                         clk_dvfs_node->vd->vd_dvfs_target(clk_dvfs_node, clk_dvfs_node->last_set_rate);
 472                                 }
 473                         }
 474                 }
 475                 mutex_unlock(&vd->mutex);
 476         }
 477         mutex_unlock(&rk_dvfs_mutex);
 478 }
 479 #endif
 480
 481 static void dvfs_temp_limit_work_func(struct work_struct *work)
 482 {
 483         int temp=0, delta_temp=0;
 484         unsigned long delay = HZ/10;
 485         unsigned long arm_rate_step=0;
 486         static int old_temp=0;
 487         int i;
 488
 489         queue_delayed_work_on(0, dvfs_wq, to_delayed_work(work), delay);
 490
 491         temp = rockchip_tsadc_get_temp(1);
 492
 493         //debounce
 494         delta_temp = (old_temp>temp) ? (old_temp-temp) : (temp-old_temp);
 495         if (delta_temp <= 1)
 496                 return;
 497
 498         if (ROCKCHIP_PM_POLICY_PERFORMANCE == rockchip_pm_get_policy()) {
 499                 if (!clk_cpu_dvfs_node->per_temp_limit_table) {
 500                         return;
 501                 }
 502
 503                 clk_cpu_dvfs_node->temp_limit_rate = clk_cpu_dvfs_node->max_rate;
 504                 for (i=0; clk_cpu_dvfs_node->per_temp_limit_table[i].frequency != CPUFREQ_TABLE_END; i++) {
 505                         if (temp > clk_cpu_dvfs_node->per_temp_limit_table[i].index) {
 506                                 clk_cpu_dvfs_node->temp_limit_rate = clk_cpu_dvfs_node->per_temp_limit_table[i].frequency;
 507                         }
 508                 }
 509                 dvfs_clk_set_rate(clk_cpu_dvfs_node, clk_cpu_dvfs_node->last_set_rate);
 510         } else if (ROCKCHIP_PM_POLICY_NORMAL == rockchip_pm_get_policy()){
 511                 if (!clk_cpu_dvfs_node->nor_temp_limit_table) {
 512                         return;
 513                 }
 514
 515                 if (temp > target_temp) {
 516                         if (temp > old_temp) {
 517                                 delta_temp = temp - target_temp;
 518                                 for (i=0; clk_cpu_dvfs_node->nor_temp_limit_table[i].frequency != CPUFREQ_TABLE_END; i++) {
 519                                         if (delta_temp > clk_cpu_dvfs_node->nor_temp_limit_table[i].index) {
 520                                                 arm_rate_step = clk_cpu_dvfs_node->nor_temp_limit_table[i].frequency;
 521                                         }
 522                                 }
 523                                 if (arm_rate_step && (clk_cpu_dvfs_node->temp_limit_rate > arm_rate_step)) {
 524                                         clk_cpu_dvfs_node->temp_limit_rate -= arm_rate_step;
 525                                         dvfs_clk_set_rate(clk_cpu_dvfs_node, clk_cpu_dvfs_node->last_set_rate);
 526                                 }
 527                         }
 528                 } else {
 529                         if (clk_cpu_dvfs_node->temp_limit_rate < clk_cpu_dvfs_node->max_rate) {
 530                                 delta_temp = target_temp - temp;
 531                                 for (i=0; clk_cpu_dvfs_node->nor_temp_limit_table[i].frequency != CPUFREQ_TABLE_END; i++) {
 532                                         if (delta_temp > clk_cpu_dvfs_node->nor_temp_limit_table[i].index) {
 533                                                 arm_rate_step = clk_cpu_dvfs_node->nor_temp_limit_table[i].frequency;
 534                                         }
 535                                 }
 536
 537                                 if (arm_rate_step) {
 538                                         clk_cpu_dvfs_node->temp_limit_rate += arm_rate_step;
 539                                         if (clk_cpu_dvfs_node->temp_limit_rate > clk_cpu_dvfs_node->max_rate) {
 540                                                 clk_cpu_dvfs_node->temp_limit_rate = clk_cpu_dvfs_node->max_rate;
 541                                         }
 542                                         dvfs_clk_set_rate(clk_cpu_dvfs_node, clk_cpu_dvfs_node->last_set_rate);
 543                                 }
 544                         }
 545                 }
 546         }
 547
 548         DVFS_DBG("cur temp: %d, temp_limit_core_rate: %lu\n", temp, clk_cpu_dvfs_node->temp_limit_rate);
 549
 550         old_temp = temp;
 551 }
 552 static DECLARE_DELAYED_WORK(dvfs_temp_limit_work, dvfs_temp_limit_work_func);
 553
 554
 555 int dvfs_clk_enable_limit(struct dvfs_node *clk_dvfs_node, unsigned int min_rate, unsigned int max_rate)
 556 {
 557         u32 rate = 0, ret = 0;
 558
 559         if (!clk_dvfs_node || (min_rate > max_rate))
 560                 return -EINVAL;
 561
 562         if (clk_dvfs_node->vd && clk_dvfs_node->vd->vd_dvfs_target){
 563                 mutex_lock(&clk_dvfs_node->vd->mutex);
 564
 565                 /* To reset clk_dvfs_node->min_rate/max_rate */
 566                 dvfs_get_rate_range(clk_dvfs_node);
 567                 clk_dvfs_node->freq_limit_en = 1;
 568
 569                 if ((min_rate >= clk_dvfs_node->min_rate) && (min_rate <= clk_dvfs_node->max_rate)) {
 570                         clk_dvfs_node->min_rate = min_rate;
 571                 }
 572
 573                 if ((max_rate >= clk_dvfs_node->min_rate) && (max_rate <= clk_dvfs_node->max_rate)) {
 574                         clk_dvfs_node->max_rate = max_rate;
 575                 }
 576
 577                 if (clk_dvfs_node->last_set_rate == 0)
 578                         rate = clk_get_rate(clk_dvfs_node->clk);
 579                 else
 580                         rate = clk_dvfs_node->last_set_rate;
 581                 ret = clk_dvfs_node->vd->vd_dvfs_target(clk_dvfs_node, rate);
 582
 583                 mutex_unlock(&clk_dvfs_node->vd->mutex);
 584
 585         }
 586
 587         DVFS_DBG("%s:clk(%s) last_set_rate=%u; [min_rate, max_rate]=[%u, %u]\n",
 588                         __func__, __clk_get_name(clk_dvfs_node->clk), clk_dvfs_node->last_set_rate,
 589                         clk_dvfs_node->min_rate, clk_dvfs_node->max_rate);
 590
 591         return 0;
 592 }
 593 EXPORT_SYMBOL(dvfs_clk_enable_limit);
 594
 595 int dvfs_clk_disable_limit(struct dvfs_node *clk_dvfs_node)
 596 {
 597         u32 ret = 0;
 598
 599         if (!clk_dvfs_node)
 600                 return -EINVAL;
 601
 602         if (clk_dvfs_node->vd && clk_dvfs_node->vd->vd_dvfs_target){
 603                 mutex_lock(&clk_dvfs_node->vd->mutex);
 604
 605                 /* To reset clk_dvfs_node->min_rate/max_rate */
 606                 dvfs_get_rate_range(clk_dvfs_node);
 607                 clk_dvfs_node->freq_limit_en = 0;
 608                 ret = clk_dvfs_node->vd->vd_dvfs_target(clk_dvfs_node, clk_dvfs_node->last_set_rate);
 609
 610                 mutex_unlock(&clk_dvfs_node->vd->mutex);
 611         }
 612
 613         DVFS_DBG("%s: clk(%s) last_set_rate=%u; [min_rate, max_rate]=[%u, %u]\n",
 614                         __func__, __clk_get_name(clk_dvfs_node->clk), clk_dvfs_node->last_set_rate, clk_dvfs_node->min_rate, clk_dvfs_node->max_rate);
 615         return 0;
 616 }
 617 EXPORT_SYMBOL(dvfs_clk_disable_limit);
 618
 619 int dvfs_clk_get_limit(struct dvfs_node *clk_dvfs_node, unsigned int *min_rate, unsigned int *max_rate)
 620 {
 621         int freq_limit_en;
 622
 623         if (!clk_dvfs_node)
 624                 return -EINVAL;
 625
 626         mutex_lock(&clk_dvfs_node->vd->mutex);
 627
 628         *min_rate = clk_dvfs_node->min_rate;
 629         *max_rate = clk_dvfs_node->max_rate;
 630         freq_limit_en = clk_dvfs_node->freq_limit_en;
 631
 632         mutex_unlock(&clk_dvfs_node->vd->mutex);
 633
 634         return freq_limit_en;
 635 }
 636 EXPORT_SYMBOL(dvfs_clk_get_limit);
 637
 638 int dvfs_clk_register_set_rate_callback(struct dvfs_node *clk_dvfs_node, clk_set_rate_callback clk_dvfs_target)
 639 {
 640         if (!clk_dvfs_node)
 641                 return -EINVAL;
 642
 643         mutex_lock(&clk_dvfs_node->vd->mutex);
 644         clk_dvfs_node->clk_dvfs_target = clk_dvfs_target;
 645         mutex_unlock(&clk_dvfs_node->vd->mutex);
 646
 647         return 0;
 648 }
 649 EXPORT_SYMBOL(dvfs_clk_register_set_rate_callback);
 650
 651 struct cpufreq_frequency_table *dvfs_get_freq_volt_table(struct dvfs_node *clk_dvfs_node)
 652 {
 653         struct cpufreq_frequency_table *table;
 654
 655         if (!clk_dvfs_node)
 656                 return NULL;
 657
 658         mutex_lock(&clk_dvfs_node->vd->mutex);
 659         table = clk_dvfs_node->dvfs_table;
 660         mutex_unlock(&clk_dvfs_node->vd->mutex);
 661
 662         return table;
 663 }
 664 EXPORT_SYMBOL(dvfs_get_freq_volt_table);
 665
 666 int dvfs_set_freq_volt_table(struct dvfs_node *clk_dvfs_node, struct cpufreq_frequency_table *table)
 667 {
 668         if (!clk_dvfs_node)
 669                 return -EINVAL;
 670
 671         if (IS_ERR_OR_NULL(table)){
 672                 DVFS_ERR("%s:invalid table!\n", __func__);
 673                 return -EINVAL;
 674         }
 675
 676         mutex_lock(&clk_dvfs_node->vd->mutex);
 677         clk_dvfs_node->dvfs_table = table;
 678         dvfs_get_rate_range(clk_dvfs_node);
 679         dvfs_table_round_clk_rate(clk_dvfs_node);
 680         dvfs_table_round_volt(clk_dvfs_node);
 681         mutex_unlock(&clk_dvfs_node->vd->mutex);
 682
 683         return 0;
 684 }
 685 EXPORT_SYMBOL(dvfs_set_freq_volt_table);
 686
 687 int clk_enable_dvfs(struct dvfs_node *clk_dvfs_node)
 688 {
 689         struct cpufreq_frequency_table clk_fv;
 690
 691         if (!clk_dvfs_node)
 692                 return -EINVAL;
 693
 694         DVFS_DBG("%s: dvfs clk(%s) enable dvfs!\n",
 695                 __func__, __clk_get_name(clk_dvfs_node->clk));
 696
 697         if (!clk_dvfs_node->vd) {
 698                 DVFS_ERR("%s: dvfs node(%s) has no vd node!\n",
 699                         __func__, clk_dvfs_node->name);
 700                 return -EINVAL;
 701         }
 702         mutex_lock(&clk_dvfs_node->vd->mutex);
 703         if (clk_dvfs_node->enable_count == 0) {
 704                 if (IS_ERR_OR_NULL(clk_dvfs_node->vd->regulator)) {
 705                         if (clk_dvfs_node->vd->regulator_name)
 706                                 clk_dvfs_node->vd->regulator = dvfs_regulator_get(NULL, clk_dvfs_node->vd->regulator_name);
 707                         if (!IS_ERR_OR_NULL(clk_dvfs_node->vd->regulator)) {
 708                                 DVFS_DBG("%s: vd(%s) get regulator(%s) ok\n",
 709                                         __func__, clk_dvfs_node->vd->name, clk_dvfs_node->vd->regulator_name);
 710                                 clk_enable_dvfs_regulator_check(clk_dvfs_node->vd);
 711                                 dvfs_get_vd_regulator_volt_list(clk_dvfs_node->vd);
 712                                 dvfs_vd_get_regulator_volt_time_info(clk_dvfs_node->vd);
 713                         } else {
 714                                 clk_dvfs_node->enable_count = 0;
 715                                 DVFS_ERR("%s: vd(%s) can't get regulator(%s)!\n",
 716                                         __func__, clk_dvfs_node->vd->name, clk_dvfs_node->vd->regulator_name);
 717                                 mutex_unlock(&clk_dvfs_node->vd->mutex);
 718                                 return -ENXIO;
 719                         }
 720                 } else {
 721                         clk_enable_dvfs_regulator_check(clk_dvfs_node->vd);
 722                 }
 723
 724                 DVFS_DBG("%s: vd(%s) cur volt=%d\n",
 725                         __func__, clk_dvfs_node->name, clk_dvfs_node->vd->cur_volt);
 726
 727                 dvfs_table_round_clk_rate(clk_dvfs_node);
 728                 dvfs_get_rate_range(clk_dvfs_node);
 729                 clk_dvfs_node->freq_limit_en = 1;
 730                 dvfs_table_round_volt(clk_dvfs_node);
 731                 clk_dvfs_node->set_freq = clk_dvfs_node_get_rate_kz(clk_dvfs_node->clk);
 732                 clk_dvfs_node->last_set_rate = clk_dvfs_node->set_freq*1000;
 733
 734                 DVFS_DBG("%s: %s get freq %u!\n",
 735                         __func__, clk_dvfs_node->name, clk_dvfs_node->set_freq);
 736
 737                 if (clk_dvfs_node_get_ref_volt(clk_dvfs_node, clk_dvfs_node->set_freq, &clk_fv)) {
 738                         if (clk_dvfs_node->dvfs_table[0].frequency == CPUFREQ_TABLE_END) {
 739                                 DVFS_ERR("%s: table empty\n", __func__);
 740                                 clk_dvfs_node->enable_count = 0;
 741                                 mutex_unlock(&clk_dvfs_node->vd->mutex);
 742                                 return -EINVAL;
 743                         } else {
 744                                 DVFS_WARNING("%s: clk(%s) freq table all value are smaller than default(%d), use default, just enable dvfs\n",
 745                                         __func__, clk_dvfs_node->name, clk_dvfs_node->set_freq);
 746                                 clk_dvfs_node->enable_count++;
 747                                 mutex_unlock(&clk_dvfs_node->vd->mutex);
 748                                 return 0;
 749                         }
 750                 }
 751
 752                 clk_dvfs_node->set_volt = clk_fv.index;
 753                 dvfs_vd_get_newvolt_byclk(clk_dvfs_node);
 754                 DVFS_DBG("%s: %s, freq %u(ref vol %u)\n",
 755                         __func__, clk_dvfs_node->name, clk_dvfs_node->set_freq, clk_dvfs_node->set_volt);
 756 #if 0
 757                 if (clk_dvfs_node->dvfs_nb) {
 758                         // must unregister when clk disable
 759                         clk_notifier_register(clk, clk_dvfs_node->dvfs_nb);
 760                 }
 761 #endif
 762                 if(clk_dvfs_node->vd->cur_volt < clk_dvfs_node->set_volt) {
 763                         int ret;
 764                         ret = dvfs_regulator_set_voltage_readback(clk_dvfs_node->vd->regulator, clk_dvfs_node->set_volt, clk_dvfs_node->set_volt);
 765                         if (ret < 0) {
 766                                 clk_dvfs_node->vd->volt_set_flag = DVFS_SET_VOLT_FAILURE;
 767                                 clk_dvfs_node->enable_count = 0;
 768                                 DVFS_ERR("dvfs enable clk %s,set volt error \n", clk_dvfs_node->name);
 769                                 mutex_unlock(&clk_dvfs_node->vd->mutex);
 770                                 return -EAGAIN;
 771                         }
 772                         clk_dvfs_node->vd->cur_volt = clk_dvfs_node->set_volt;
 773                         clk_dvfs_node->vd->volt_set_flag = DVFS_SET_VOLT_SUCCESS;
 774                 }
 775
 776                 clk_dvfs_node->enable_count++;
 777         } else {
 778                 DVFS_DBG("%s: dvfs already enable clk enable = %d!\n",
 779                         __func__, clk_dvfs_node->enable_count);
 780                 clk_dvfs_node->enable_count++;
 781         }
 782
 783         mutex_unlock(&clk_dvfs_node->vd->mutex);
 784
 785         return 0;
 786 }
 787 EXPORT_SYMBOL(clk_enable_dvfs);
 788
 789 int clk_disable_dvfs(struct dvfs_node *clk_dvfs_node)
 790 {
 791         if (!clk_dvfs_node)
 792                 return -EINVAL;
 793
 794         DVFS_DBG("%s:dvfs clk(%s) disable dvfs!\n",
 795                 __func__, __clk_get_name(clk_dvfs_node->clk));
 796
 797         mutex_lock(&clk_dvfs_node->vd->mutex);
 798         if (!clk_dvfs_node->enable_count) {
 799                 DVFS_WARNING("%s:clk(%s) is already closed!\n",
 800                         __func__, __clk_get_name(clk_dvfs_node->clk));
 801                 return 0;
 802         } else {
 803                 clk_dvfs_node->enable_count--;
 804                 if (0 == clk_dvfs_node->enable_count) {
 805                         DVFS_DBG("%s:dvfs clk(%s) disable dvfs ok!\n",
 806                                 __func__, __clk_get_name(clk_dvfs_node->clk));
 807 #if 0
 808                         clk_notifier_unregister(clk, clk_dvfs_node->dvfs_nb);
 809                         DVFS_DBG("clk unregister nb!\n");
 810 #endif
 811                 }
 812         }
 813         mutex_unlock(&clk_dvfs_node->vd->mutex);
 814         return 0;
 815 }
 816 EXPORT_SYMBOL(clk_disable_dvfs);
 817
 818
 819
 820
 821 static unsigned long dvfs_get_limit_rate(struct dvfs_node *clk_dvfs_node, unsigned long rate)
 822 {
 823         unsigned long limit_rate;
 824
 825         limit_rate = rate;
 826         if (clk_dvfs_node->freq_limit_en) {
 827                 //dvfs table limit
 828                 if (rate < clk_dvfs_node->min_rate) {
 829                         limit_rate = clk_dvfs_node->min_rate;
 830                 } else if (rate > clk_dvfs_node->max_rate) {
 831                         limit_rate = clk_dvfs_node->max_rate;
 832                 }
 833
 834                 if (limit_rate > clk_dvfs_node->temp_limit_rate) {
 835                         limit_rate = clk_dvfs_node->temp_limit_rate;
 836                 }
 837         }
 838
 839         DVFS_DBG("%s: rate:%ld, limit_rate:%ld,\n", __func__, rate, limit_rate);
 840
 841         return limit_rate;
 842 }
 843
 844 static int dvfs_target(struct dvfs_node *clk_dvfs_node, unsigned long rate)
 845 {
 846         struct cpufreq_frequency_table clk_fv;
 847         unsigned long old_rate = 0, new_rate = 0, volt_new = 0, clk_volt_store = 0;
 848         struct clk *clk = clk_dvfs_node->clk;
 849         int ret;
 850
 851         if (!clk)
 852                 return -EINVAL;
 853
 854         if (!clk_dvfs_node->enable_count){
 855                 DVFS_WARNING("%s:dvfs(%s) is disable\n",
 856                         __func__, clk_dvfs_node->name);
 857                 return 0;
 858         }
 859
 860         if (clk_dvfs_node->vd->volt_set_flag == DVFS_SET_VOLT_FAILURE) {
 861                 /* It means the last time set voltage error */
 862                 ret = dvfs_reset_volt(clk_dvfs_node->vd);
 863                 if (ret < 0) {
 864                         return -EAGAIN;
 865                 }
 866         }
 867
 868         rate = dvfs_get_limit_rate(clk_dvfs_node, rate);
 869         new_rate = clk_round_rate(clk, rate);
 870         old_rate = clk_get_rate(clk);
 871         if (new_rate == old_rate)
 872                 return 0;
 873
 874         DVFS_DBG("enter %s: clk(%s) new_rate = %lu Hz, old_rate =  %lu Hz\n",
 875                 __func__, clk_dvfs_node->name, rate, old_rate);
 876
 877         /* find the clk corresponding voltage */
 878         ret = clk_dvfs_node_get_ref_volt(clk_dvfs_node, new_rate / 1000, &clk_fv);
 879         if (ret) {
 880                 DVFS_ERR("%s:dvfs clk(%s) rate %luhz is not support\n",
 881                         __func__, clk_dvfs_node->name, new_rate);
 882                 return ret;
 883         }
 884         clk_volt_store = clk_dvfs_node->set_volt;
 885         clk_dvfs_node->set_volt = clk_fv.index;
 886         volt_new = dvfs_vd_get_newvolt_byclk(clk_dvfs_node);
 887         DVFS_DBG("%s:%s new rate=%lu(was=%lu),new volt=%lu,(was=%d)\n",
 888                 __func__, clk_dvfs_node->name, new_rate, old_rate, volt_new,clk_dvfs_node->vd->cur_volt);
 889
 890         /* if up the rate */
 891         if (new_rate > old_rate) {
 892                 ret = dvfs_scale_volt_direct(clk_dvfs_node->vd, volt_new);
 893                 if (ret)
 894                         goto fail_roll_back;
 895         }
 896
 897         /* scale rate */
 898         if (clk_dvfs_node->clk_dvfs_target) {
 899                 ret = clk_dvfs_node->clk_dvfs_target(clk, new_rate);
 900         } else {
 901                 ret = clk_set_rate(clk, new_rate);
 902         }
 903
 904         if (ret) {
 905                 DVFS_ERR("%s:clk(%s) set rate err\n",
 906                         __func__, __clk_get_name(clk));
 907                 goto fail_roll_back;
 908         }
 909         clk_dvfs_node->set_freq = new_rate / 1000;
 910
 911         DVFS_DBG("%s:dvfs clk(%s) set rate %lu ok\n",
 912                 __func__, clk_dvfs_node->name, clk_get_rate(clk));
 913
 914         /* if down the rate */
 915         if (new_rate < old_rate) {
 916                 ret = dvfs_scale_volt_direct(clk_dvfs_node->vd, volt_new);
 917                 if (ret)
 918                         goto out;
 919         }
 920
 921         return 0;
 922 fail_roll_back:
 923         clk_dvfs_node->set_volt = clk_volt_store;
 924 out:
 925         return ret;
 926 }
 927
 928 unsigned long dvfs_clk_get_rate(struct dvfs_node *clk_dvfs_node)
 929 {
 930         return clk_get_rate(clk_dvfs_node->clk);
 931 }
 932 EXPORT_SYMBOL_GPL(dvfs_clk_get_rate);
 933
 934 int dvfs_clk_enable(struct dvfs_node *clk_dvfs_node)
 935 {
 936         return clk_enable(clk_dvfs_node->clk);
 937 }
 938 EXPORT_SYMBOL_GPL(dvfs_clk_enable);
 939
 940 void dvfs_clk_disable(struct dvfs_node *clk_dvfs_node)
 941 {
 942         return clk_disable(clk_dvfs_node->clk);
 943 }
 944 EXPORT_SYMBOL_GPL(dvfs_clk_disable);
 945
 946 struct dvfs_node *clk_get_dvfs_node(char *clk_name)
 947 {
 948         struct vd_node *vd;
 949         struct pd_node *pd;
 950         struct dvfs_node *clk_dvfs_node;
 951
 952         mutex_lock(&rk_dvfs_mutex);
 953         list_for_each_entry(vd, &rk_dvfs_tree, node) {
 954                 mutex_lock(&vd->mutex);
 955                 list_for_each_entry(pd, &vd->pd_list, node) {
 956                         list_for_each_entry(clk_dvfs_node, &pd->clk_list, node) {
 957                                 if (0 == strcmp(clk_dvfs_node->name, clk_name)) {
 958                                         mutex_unlock(&vd->mutex);
 959                                         mutex_unlock(&rk_dvfs_mutex);
 960                                         return clk_dvfs_node;
 961                                 }
 962                         }
 963                 }
 964                 mutex_unlock(&vd->mutex);
 965         }
 966         mutex_unlock(&rk_dvfs_mutex);
 967
 968         return NULL;
 969 }
 970 EXPORT_SYMBOL_GPL(clk_get_dvfs_node);
 971
 972 void clk_put_dvfs_node(struct dvfs_node *clk_dvfs_node)
 973 {
 974         return;
 975 }
 976 EXPORT_SYMBOL_GPL(clk_put_dvfs_node);
 977
 978 int dvfs_clk_prepare_enable(struct dvfs_node *clk_dvfs_node)
 979 {
 980         return clk_prepare_enable(clk_dvfs_node->clk);
 981 }
 982 EXPORT_SYMBOL_GPL(dvfs_clk_prepare_enable);
 983
 984
 985 void dvfs_clk_disable_unprepare(struct dvfs_node *clk_dvfs_node)
 986 {
 987         clk_disable_unprepare(clk_dvfs_node->clk);
 988 }
 989 EXPORT_SYMBOL_GPL(dvfs_clk_disable_unprepare);
 990
 991 int dvfs_clk_set_rate(struct dvfs_node *clk_dvfs_node, unsigned long rate)
 992 {
 993         int ret = -EINVAL;
 994
 995         if (!clk_dvfs_node)
 996                 return -EINVAL;
 997
 998         DVFS_DBG("%s:dvfs node(%s) set rate(%lu)\n",
 999                 __func__, clk_dvfs_node->name, rate);
1000
1001         #if 0 // judge by reference func in rk
1002         if (dvfs_support_clk_set_rate(dvfs_info)==false) {
1003                 DVFS_ERR("dvfs func:%s is not support!\n", __func__);
1004                 return ret;
1005         }
1006         #endif
1007
1008         if (clk_dvfs_node->vd && clk_dvfs_node->vd->vd_dvfs_target) {
1009                 mutex_lock(&clk_dvfs_node->vd->mutex);
1010                 ret = clk_dvfs_node->vd->vd_dvfs_target(clk_dvfs_node, rate);
1011                 clk_dvfs_node->last_set_rate = rate;
1012                 mutex_unlock(&clk_dvfs_node->vd->mutex);
1013         } else {
1014                 DVFS_ERR("%s:dvfs node(%s) has no vd node or target callback!\n",
1015                         __func__, clk_dvfs_node->name);
1016         }
1017
1018         return ret;
1019 }
1020 EXPORT_SYMBOL_GPL(dvfs_clk_set_rate);
1021
1022
1023 int rk_regist_vd(struct vd_node *vd)
1024 {
1025         if (!vd)
1026                 return -EINVAL;
1027
1028         vd->mode_flag=0;
1029         vd->volt_time_flag=0;
1030         vd->n_voltages=0;
1031         INIT_LIST_HEAD(&vd->pd_list);
1032         mutex_lock(&rk_dvfs_mutex);
1033         list_add(&vd->node, &rk_dvfs_tree);
1034         mutex_unlock(&rk_dvfs_mutex);
1035
1036         return 0;
1037 }
1038 EXPORT_SYMBOL_GPL(rk_regist_vd);
1039
1040 int rk_regist_pd(struct pd_node *pd)
1041 {
1042         struct vd_node  *vd;
1043
1044         if (!pd)
1045                 return -EINVAL;
1046
1047         vd = pd->vd;
1048         if (!vd)
1049                 return -EINVAL;
1050
1051         INIT_LIST_HEAD(&pd->clk_list);
1052         mutex_lock(&vd->mutex);
1053         list_add(&pd->node, &vd->pd_list);
1054         mutex_unlock(&vd->mutex);
1055
1056         return 0;
1057 }
1058 EXPORT_SYMBOL_GPL(rk_regist_pd);
1059
1060 int rk_regist_clk(struct dvfs_node *clk_dvfs_node)
1061 {
1062         struct vd_node  *vd;
1063         struct pd_node  *pd;
1064
1065         if (!clk_dvfs_node)
1066                 return -EINVAL;
1067
1068         vd = clk_dvfs_node->vd;
1069         pd = clk_dvfs_node->pd;
1070         if (!vd || !pd)
1071                 return -EINVAL;
1072
1073         mutex_lock(&vd->mutex);
1074         list_add(&clk_dvfs_node->node, &pd->clk_list);
1075         mutex_unlock(&vd->mutex);
1076
1077         return 0;
1078 }
1079 EXPORT_SYMBOL_GPL(rk_regist_clk);
1080
1081 static int rk_convert_cpufreq_table(struct dvfs_node *dvfs_node)
1082 {
1083         struct opp *opp;
1084         struct device *dev;
1085         struct cpufreq_frequency_table *table;
1086         int i;
1087
1088         table = dvfs_node->dvfs_table;
1089         dev = &dvfs_node->dev;
1090
1091         for (i = 0; table[i].frequency!= CPUFREQ_TABLE_END; i++){
1092                 opp = opp_find_freq_exact(dev, table[i].frequency * 1000, true);
1093                 if (IS_ERR(opp))
1094                         return PTR_ERR(opp);
1095                 table[i].index = opp_get_voltage(opp);
1096         }
1097         return 0;
1098 }
1099
1100 static struct cpufreq_frequency_table *of_get_temp_limit_table(struct device_node *dev_node, const char *propname)
1101 {
1102         struct cpufreq_frequency_table *temp_limt_table = NULL;
1103         const struct property *prop;
1104         const __be32 *val;
1105         int nr, i;
1106
1107         prop = of_find_property(dev_node, propname, NULL);
1108         if (!prop)
1109                 return NULL;
1110         if (!prop->value)
1111                 return NULL;
1112
1113         nr = prop->length / sizeof(u32);
1114         if (nr % 2) {
1115                 pr_err("%s: Invalid freq list\n", __func__);
1116                 return NULL;
1117         }
1118
1119         temp_limt_table = kzalloc(sizeof(struct cpufreq_frequency_table) *
1120                              (nr/2 + 1), GFP_KERNEL);
1121
1122         val = prop->value;
1123
1124         for (i=0; i<nr/2; i++){
1125                 temp_limt_table[i].index = be32_to_cpup(val++);
1126                 temp_limt_table[i].frequency = be32_to_cpup(val++) * 1000;
1127         }
1128
1129         temp_limt_table[i].index = 0;
1130         temp_limt_table[i].frequency = CPUFREQ_TABLE_END;
1131
1132         return temp_limt_table;
1133
1134 }
1135
1136 int of_dvfs_init(void)
1137 {
1138         struct vd_node *vd;
1139         struct pd_node *pd;
1140         struct device_node *dvfs_dev_node, *clk_dev_node, *vd_dev_node, *pd_dev_node;
1141         struct dvfs_node *dvfs_node;
1142         struct clk *clk;
1143         const __be32 *val;
1144         int ret;
1145
1146         DVFS_DBG("%s\n", __func__);
1147
1148         dvfs_dev_node = of_find_node_by_name(NULL, "dvfs");
1149         if (IS_ERR_OR_NULL(dvfs_dev_node)) {
1150                 DVFS_ERR("%s get dvfs dev node err\n", __func__);
1151                 return PTR_ERR(dvfs_dev_node);
1152         }
1153
1154         val = of_get_property(dvfs_dev_node, "target-temp", NULL);
1155         if (val) {
1156                 target_temp = be32_to_cpup(val);
1157         }
1158
1159         val = of_get_property(dvfs_dev_node, "temp-limit-enable", NULL);
1160         if (val) {
1161                 temp_limit_enable = be32_to_cpup(val);
1162         }
1163
1164         for_each_available_child_of_node(dvfs_dev_node, vd_dev_node) {
1165                 vd = kzalloc(sizeof(struct vd_node), GFP_KERNEL);
1166                 if (!vd)
1167                         return -ENOMEM;
1168
1169                 mutex_init(&vd->mutex);
1170                 vd->name = vd_dev_node->name;
1171                 ret = of_property_read_string(vd_dev_node, "regulator_name", &vd->regulator_name);
1172                 if (ret) {
1173                         DVFS_ERR("%s:vd(%s) get regulator_name err, ret:%d\n",
1174                                 __func__, vd_dev_node->name, ret);
1175                         kfree(vd);
1176                         continue;
1177                 }
1178
1179                 vd->suspend_volt = 0;
1180
1181                 vd->volt_set_flag = DVFS_SET_VOLT_FAILURE;
1182                 vd->vd_dvfs_target = dvfs_target;
1183                 ret = rk_regist_vd(vd);
1184                 if (ret){
1185                         DVFS_ERR("%s:vd(%s) register err:%d\n", __func__, vd->name, ret);
1186                         kfree(vd);
1187                         continue;
1188                 }
1189
1190                 DVFS_DBG("%s:vd(%s) register ok, regulator name:%s,suspend volt:%d\n",
1191                         __func__, vd->name, vd->regulator_name, vd->suspend_volt);
1192
1193                 for_each_available_child_of_node(vd_dev_node, pd_dev_node) {
1194                         pd = kzalloc(sizeof(struct pd_node), GFP_KERNEL);
1195                         if (!pd)
1196                                 return -ENOMEM;
1197
1198                         pd->vd = vd;
1199                         pd->name = pd_dev_node->name;
1200
1201                         ret = rk_regist_pd(pd);
1202                         if (ret){
1203                                 DVFS_ERR("%s:pd(%s) register err:%d\n", __func__, pd->name, ret);
1204                                 kfree(pd);
1205                                 continue;
1206                         }
1207                         DVFS_DBG("%s:pd(%s) register ok, parent vd:%s\n",
1208                                 __func__, pd->name, vd->name);
1209                         for_each_available_child_of_node(pd_dev_node, clk_dev_node) {
1210                                 if (!of_device_is_available(clk_dev_node))
1211                                         continue;
1212
1213                                 dvfs_node = kzalloc(sizeof(struct dvfs_node), GFP_KERNEL);
1214                                 if (!dvfs_node)
1215                                         return -ENOMEM;
1216
1217                                 dvfs_node->name = clk_dev_node->name;
1218                                 dvfs_node->pd = pd;
1219                                 dvfs_node->vd = vd;
1220                                 if (temp_limit_enable) {
1221                                         val = of_get_property(clk_dev_node, "temp-channel", NULL);
1222                                         if (val) {
1223                                                 dvfs_node->temp_channel = be32_to_cpup(val);
1224                                         }
1225                                         dvfs_node->nor_temp_limit_table = of_get_temp_limit_table(clk_dev_node, "normal-temp-limit");
1226                                         dvfs_node->per_temp_limit_table = of_get_temp_limit_table(clk_dev_node, "performance-temp-limit");
1227                                 }
1228                                 dvfs_node->temp_limit_rate = -1;
1229                                 dvfs_node->dev.of_node = clk_dev_node;
1230                                 ret = of_init_opp_table(&dvfs_node->dev);
1231                                 if (ret) {
1232                                         DVFS_ERR("%s:clk(%s) get opp table err:%d\n", __func__, dvfs_node->name, ret);
1233                                         kfree(dvfs_node);
1234                                         continue;
1235                                 }
1236
1237                                 ret = opp_init_cpufreq_table(&dvfs_node->dev, &dvfs_node->dvfs_table);
1238                                 if (ret) {
1239                                         DVFS_ERR("%s:clk(%s) get cpufreq table err:%d\n", __func__, dvfs_node->name, ret);
1240                                         kfree(dvfs_node);
1241                                         continue;
1242                                 }
1243                                 ret = rk_convert_cpufreq_table(dvfs_node);
1244                                 if (ret) {
1245                                         kfree(dvfs_node);
1246                                         continue;
1247                                 }
1248
1249                                 clk = clk_get(NULL, clk_dev_node->name);
1250                                 if (IS_ERR(clk)){
1251                                         DVFS_ERR("%s:get clk(%s) err:%ld\n", __func__, dvfs_node->name, PTR_ERR(clk));
1252                                         kfree(dvfs_node);
1253                                         continue;
1254
1255                                 }
1256
1257                                 dvfs_node->clk = clk;
1258                                 ret = rk_regist_clk(dvfs_node);
1259                                 if (ret){
1260                                         DVFS_ERR("%s:dvfs_node(%s) register err:%d\n", __func__, dvfs_node->name, ret);
1261                                         return ret;
1262                                 }
1263
1264                                 DVFS_DBG("%s:dvfs_node(%s) register ok, parent pd:%s\n",
1265                                         __func__, clk_dev_node->name, pd->name);
1266
1267                         }
1268                 }
1269         }
1270         return 0;
1271 }
1272
1273 /*********************************************************************************/
1274 /**
1275  * dump_dbg_map() : Draw all informations of dvfs while debug
1276  */
1277 static int dump_dbg_map(char *buf)
1278 {
1279         int i;
1280         struct vd_node  *vd;
1281         struct pd_node  *pd;
1282         struct dvfs_node        *clk_dvfs_node;
1283         char *s = buf;
1284
1285         mutex_lock(&rk_dvfs_mutex);
1286         printk( "-------------DVFS TREE-----------\n\n\n");
1287         printk( "DVFS TREE:\n");
1288
1289         list_for_each_entry(vd, &rk_dvfs_tree, node) {
1290                 mutex_lock(&vd->mutex);
1291                 printk( "|\n|- voltage domain:%s\n", vd->name);
1292                 printk( "|- current voltage:%d\n", vd->cur_volt);
1293
1294                 list_for_each_entry(pd, &vd->pd_list, node) {
1295                         printk( "|  |\n|  |- power domain:%s, status = %s, current volt = %d\n",
1296                                         pd->name, (pd->pd_status == 1) ? "ON" : "OFF", pd->cur_volt);
1297
1298                         list_for_each_entry(clk_dvfs_node, &pd->clk_list, node) {
1299                                 printk( "|  |  |\n|  |  |- clock: %s current: rate %d, volt = %d,"
1300                                                 " enable_dvfs = %s\n",
1301                                                 clk_dvfs_node->name, clk_dvfs_node->set_freq, clk_dvfs_node->set_volt,
1302                                                 clk_dvfs_node->enable_count == 0 ? "DISABLE" : "ENABLE");
1303                                 printk( "|  |  |- clk limit(%s):[%u, %u]; last set rate = %u\n",
1304                                                 clk_dvfs_node->freq_limit_en ? "enable" : "disable",
1305                                                 clk_dvfs_node->min_rate, clk_dvfs_node->max_rate,
1306                                                 clk_dvfs_node->last_set_rate/1000);
1307
1308                                 for (i = 0; (clk_dvfs_node->dvfs_table[i].frequency != CPUFREQ_TABLE_END); i++) {
1309                                         printk( "|  |  |  |- freq = %d, volt = %d\n",
1310                                                         clk_dvfs_node->dvfs_table[i].frequency,
1311                                                         clk_dvfs_node->dvfs_table[i].index);
1312
1313                                 }
1314                         }
1315                 }
1316                 mutex_unlock(&vd->mutex);
1317         }
1318
1319         printk( "-------------DVFS TREE END------------\n");
1320         mutex_unlock(&rk_dvfs_mutex);
1321
1322         return s - buf;
1323 }
1324
1325 /*********************************************************************************/
1326 static struct kobject *dvfs_kobj;
1327 struct dvfs_attribute {
1328         struct attribute        attr;
1329         ssize_t (*show)(struct kobject *kobj, struct kobj_attribute *attr,
1330                         char *buf);
1331         ssize_t (*store)(struct kobject *kobj, struct kobj_attribute *attr,
1332                         const char *buf, size_t n);
1333 };
1334
1335 static ssize_t dvfs_tree_store(struct kobject *kobj, struct kobj_attribute *attr,
1336                const char *buf, size_t n)
1337 {
1338        return n;
1339 }
1340 static ssize_t dvfs_tree_show(struct kobject *kobj, struct kobj_attribute *attr,
1341                char *buf)
1342 {
1343        return dump_dbg_map(buf);
1344 }
1345
1346
1347 static struct dvfs_attribute dvfs_attrs[] = {
1348         /*     node_name        permision               show_func       store_func */
1349 //#ifdef CONFIG_RK_CLOCK_PROC
1350         __ATTR(dvfs_tree,       S_IRUSR | S_IRGRP | S_IWUSR,    dvfs_tree_show, dvfs_tree_store),
1351 //#endif
1352 };
1353
1354 static int __init dvfs_init(void)
1355 {
1356         int i, ret = 0;
1357
1358         dvfs_kobj = kobject_create_and_add("dvfs", NULL);
1359         if (!dvfs_kobj)
1360                 return -ENOMEM;
1361         for (i = 0; i < ARRAY_SIZE(dvfs_attrs); i++) {
1362                 ret = sysfs_create_file(dvfs_kobj, &dvfs_attrs[i].attr);
1363                 if (ret != 0) {
1364                         DVFS_ERR("create index %d error\n", i);
1365                         return ret;
1366                 }
1367         }
1368
1369         if (temp_limit_enable) {
1370                 clk_cpu_dvfs_node = clk_get_dvfs_node("clk_core");
1371                 if (!clk_cpu_dvfs_node){
1372                         return -EINVAL;
1373                 }
1374
1375                 clk_cpu_dvfs_node->temp_limit_rate = clk_cpu_dvfs_node->max_rate;
1376                 dvfs_wq = alloc_workqueue("dvfs", WQ_NON_REENTRANT | WQ_MEM_RECLAIM | WQ_HIGHPRI | WQ_FREEZABLE, 1);
1377                 queue_delayed_work_on(0, dvfs_wq, &dvfs_temp_limit_work, 0*HZ);
1378         }
1379
1380         return ret;
1381 }
1382
1383 late_initcall(dvfs_init);