drivers/regulator/max77686.c

   1 /*
   2  * max77686.c - Regulator driver for the Maxim 77686
   3  *
   4  * Copyright (C) 2012 Samsung Electronics
   5  * Chiwoong Byun <woong.byun@smasung.com>
   6  * Jonghwa Lee <jonghwa3.lee@samsung.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  * This driver is based on max8997.c
  23  */
  24
  25 #include <linux/kernel.h>
  26 #include <linux/bug.h>
  27 #include <linux/err.h>
  28 #include <linux/gpio.h>
  29 #include <linux/slab.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/regulator/driver.h>
  32 #include <linux/regulator/machine.h>
  33 #include <linux/regulator/of_regulator.h>
  34 #include <linux/mfd/max77686.h>
  35 #include <linux/mfd/max77686-private.h>
  36
  37 #define MAX77686_LDO_MINUV      800000
  38 #define MAX77686_LDO_UVSTEP     50000
  39 #define MAX77686_LDO_LOW_MINUV  800000
  40 #define MAX77686_LDO_LOW_UVSTEP 25000
  41 #define MAX77686_BUCK_MINUV     750000
  42 #define MAX77686_BUCK_UVSTEP    50000
  43 #define MAX77686_RAMP_DELAY     100000                  /* uV/us */
  44 #define MAX77686_DVS_RAMP_DELAY 27500                   /* uV/us */
  45 #define MAX77686_DVS_MINUV      600000
  46 #define MAX77686_DVS_UVSTEP     12500
  47
  48 /*
  49  * Values used for configuring LDOs and bucks.
  50  * Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
  51  */
  52 #define MAX77686_LDO_LOWPOWER           0x1
  53 /*
  54  * On/off controlled by PWRREQ:
  55  *  - LDO2, 6-8, 10-12, 14-16
  56  *  - buck[1234]
  57  */
  58 #define MAX77686_OFF_PWRREQ             0x1
  59 /* Low power mode controlled by PWRREQ: All LDOs */
  60 #define MAX77686_LDO_LOWPOWER_PWRREQ    0x2
  61 /* Forcing low power mode: buck[234] */
  62 #define MAX77686_BUCK_LOWPOWER          0x2
  63 #define MAX77686_NORMAL                 0x3
  64
  65 #define MAX77686_OPMODE_SHIFT   6
  66 #define MAX77686_OPMODE_BUCK234_SHIFT   4
  67 #define MAX77686_OPMODE_MASK    0x3
  68
  69 #define MAX77686_VSEL_MASK      0x3F
  70 #define MAX77686_DVS_VSEL_MASK  0xFF
  71
  72 #define MAX77686_RAMP_RATE_MASK 0xC0
  73
  74 #define MAX77686_REGULATORS     MAX77686_REG_MAX
  75 #define MAX77686_LDOS           26
  76
  77 enum max77686_ramp_rate {
  78         RAMP_RATE_13P75MV,
  79         RAMP_RATE_27P5MV,
  80         RAMP_RATE_55MV,
  81         RAMP_RATE_NO_CTRL,      /* 100mV/us */
  82 };
  83
  84 struct max77686_data {
  85         /* Array indexed by regulator id */
  86         unsigned int opmode[MAX77686_REGULATORS];
  87 };
  88
  89 static unsigned int max77686_get_opmode_shift(int id)
  90 {
  91         switch (id) {
  92         case MAX77686_BUCK1:
  93         case MAX77686_BUCK5 ... MAX77686_BUCK9:
  94                 return 0;
  95         case MAX77686_BUCK2 ... MAX77686_BUCK4:
  96                 return MAX77686_OPMODE_BUCK234_SHIFT;
  97         default:
  98                 /* all LDOs */
  99                 return MAX77686_OPMODE_SHIFT;
 100         }
 101 }
 102
 103 /* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
 104 static int max77686_set_suspend_disable(struct regulator_dev *rdev)
 105 {
 106         unsigned int val, shift;
 107         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 108         int ret, id = rdev_get_id(rdev);
 109
 110         shift = max77686_get_opmode_shift(id);
 111         val = MAX77686_OFF_PWRREQ;
 112
 113         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 114                                  rdev->desc->enable_mask, val << shift);
 115         if (ret)
 116                 return ret;
 117
 118         max77686->opmode[id] = val;
 119         return 0;
 120 }
 121
 122 /* Some LDOs supports [LPM/Normal]ON mode during suspend state */
 123 static int max77686_set_suspend_mode(struct regulator_dev *rdev,
 124                                      unsigned int mode)
 125 {
 126         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 127         unsigned int val;
 128         int ret, id = rdev_get_id(rdev);
 129
 130         /* BUCK[5-9] doesn't support this feature */
 131         if (id >= MAX77686_BUCK5)
 132                 return 0;
 133
 134         switch (mode) {
 135         case REGULATOR_MODE_IDLE:                       /* ON in LP Mode */
 136                 val = MAX77686_LDO_LOWPOWER_PWRREQ;
 137                 break;
 138         case REGULATOR_MODE_NORMAL:                     /* ON in Normal Mode */
 139                 val = MAX77686_NORMAL;
 140                 break;
 141         default:
 142                 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
 143                         rdev->desc->name, mode);
 144                 return -EINVAL;
 145         }
 146
 147         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 148                                   rdev->desc->enable_mask,
 149                                   val << MAX77686_OPMODE_SHIFT);
 150         if (ret)
 151                 return ret;
 152
 153         max77686->opmode[id] = val;
 154         return 0;
 155 }
 156
 157 /* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
 158 static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
 159                                      unsigned int mode)
 160 {
 161         unsigned int val;
 162         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 163         int ret;
 164
 165         switch (mode) {
 166         case REGULATOR_MODE_STANDBY:                    /* switch off */
 167                 val = MAX77686_OFF_PWRREQ;
 168                 break;
 169         case REGULATOR_MODE_IDLE:                       /* ON in LP Mode */
 170                 val = MAX77686_LDO_LOWPOWER_PWRREQ;
 171                 break;
 172         case REGULATOR_MODE_NORMAL:                     /* ON in Normal Mode */
 173                 val = MAX77686_NORMAL;
 174                 break;
 175         default:
 176                 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
 177                         rdev->desc->name, mode);
 178                 return -EINVAL;
 179         }
 180
 181         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 182                                  rdev->desc->enable_mask,
 183                                  val << MAX77686_OPMODE_SHIFT);
 184         if (ret)
 185                 return ret;
 186
 187         max77686->opmode[rdev_get_id(rdev)] = val;
 188         return 0;
 189 }
 190
 191 static int max77686_enable(struct regulator_dev *rdev)
 192 {
 193         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 194         unsigned int shift;
 195         int id = rdev_get_id(rdev);
 196
 197         shift = max77686_get_opmode_shift(id);
 198
 199         if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
 200                 max77686->opmode[id] = MAX77686_NORMAL;
 201
 202         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 203                                   rdev->desc->enable_mask,
 204                                   max77686->opmode[id] << shift);
 205 }
 206
 207 static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 208 {
 209         unsigned int ramp_value = RAMP_RATE_NO_CTRL;
 210
 211         switch (ramp_delay) {
 212         case 1 ... 13750:
 213                 ramp_value = RAMP_RATE_13P75MV;
 214                 break;
 215         case 13751 ... 27500:
 216                 ramp_value = RAMP_RATE_27P5MV;
 217                 break;
 218         case 27501 ... 55000:
 219                 ramp_value = RAMP_RATE_55MV;
 220                 break;
 221         case 55001 ... 100000:
 222                 break;
 223         default:
 224                 pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
 225                         rdev->desc->name, ramp_delay);
 226         }
 227
 228         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 229                                   MAX77686_RAMP_RATE_MASK, ramp_value << 6);
 230 }
 231
 232 static struct regulator_ops max77686_ops = {
 233         .list_voltage           = regulator_list_voltage_linear,
 234         .map_voltage            = regulator_map_voltage_linear,
 235         .is_enabled             = regulator_is_enabled_regmap,
 236         .enable                 = max77686_enable,
 237         .disable                = regulator_disable_regmap,
 238         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 239         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 240         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 241         .set_suspend_mode       = max77686_set_suspend_mode,
 242 };
 243
 244 static struct regulator_ops max77686_ldo_ops = {
 245         .list_voltage           = regulator_list_voltage_linear,
 246         .map_voltage            = regulator_map_voltage_linear,
 247         .is_enabled             = regulator_is_enabled_regmap,
 248         .enable                 = max77686_enable,
 249         .disable                = regulator_disable_regmap,
 250         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 251         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 252         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 253         .set_suspend_mode       = max77686_ldo_set_suspend_mode,
 254         .set_suspend_disable    = max77686_set_suspend_disable,
 255 };
 256
 257 static struct regulator_ops max77686_buck1_ops = {
 258         .list_voltage           = regulator_list_voltage_linear,
 259         .map_voltage            = regulator_map_voltage_linear,
 260         .is_enabled             = regulator_is_enabled_regmap,
 261         .enable                 = max77686_enable,
 262         .disable                = regulator_disable_regmap,
 263         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 264         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 265         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 266         .set_suspend_disable    = max77686_set_suspend_disable,
 267 };
 268
 269 static struct regulator_ops max77686_buck_dvs_ops = {
 270         .list_voltage           = regulator_list_voltage_linear,
 271         .map_voltage            = regulator_map_voltage_linear,
 272         .is_enabled             = regulator_is_enabled_regmap,
 273         .enable                 = max77686_enable,
 274         .disable                = regulator_disable_regmap,
 275         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 276         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 277         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 278         .set_ramp_delay         = max77686_set_ramp_delay,
 279         .set_suspend_disable    = max77686_set_suspend_disable,
 280 };
 281
 282 #define regulator_desc_ldo(num)         {                               \
 283         .name           = "LDO"#num,                                    \
 284         .of_match       = of_match_ptr("LDO"#num),                      \
 285         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 286         .id             = MAX77686_LDO##num,                            \
 287         .ops            = &max77686_ops,                                \
 288         .type           = REGULATOR_VOLTAGE,                            \
 289         .owner          = THIS_MODULE,                                  \
 290         .min_uV         = MAX77686_LDO_MINUV,                           \
 291         .uV_step        = MAX77686_LDO_UVSTEP,                          \
 292         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 293         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 294         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 295         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 296         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 297         .enable_mask    = MAX77686_OPMODE_MASK                          \
 298                         << MAX77686_OPMODE_SHIFT,                       \
 299 }
 300 #define regulator_desc_lpm_ldo(num)     {                               \
 301         .name           = "LDO"#num,                                    \
 302         .of_match       = of_match_ptr("LDO"#num),                      \
 303         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 304         .id             = MAX77686_LDO##num,                            \
 305         .ops            = &max77686_ldo_ops,                            \
 306         .type           = REGULATOR_VOLTAGE,                            \
 307         .owner          = THIS_MODULE,                                  \
 308         .min_uV         = MAX77686_LDO_MINUV,                           \
 309         .uV_step        = MAX77686_LDO_UVSTEP,                          \
 310         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 311         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 312         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 313         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 314         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 315         .enable_mask    = MAX77686_OPMODE_MASK                          \
 316                         << MAX77686_OPMODE_SHIFT,                       \
 317 }
 318 #define regulator_desc_ldo_low(num)             {                       \
 319         .name           = "LDO"#num,                                    \
 320         .of_match       = of_match_ptr("LDO"#num),                      \
 321         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 322         .id             = MAX77686_LDO##num,                            \
 323         .ops            = &max77686_ldo_ops,                            \
 324         .type           = REGULATOR_VOLTAGE,                            \
 325         .owner          = THIS_MODULE,                                  \
 326         .min_uV         = MAX77686_LDO_LOW_MINUV,                       \
 327         .uV_step        = MAX77686_LDO_LOW_UVSTEP,                      \
 328         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 329         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 330         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 331         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 332         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 333         .enable_mask    = MAX77686_OPMODE_MASK                          \
 334                         << MAX77686_OPMODE_SHIFT,                       \
 335 }
 336 #define regulator_desc_ldo1_low(num)            {                       \
 337         .name           = "LDO"#num,                                    \
 338         .of_match       = of_match_ptr("LDO"#num),                      \
 339         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 340         .id             = MAX77686_LDO##num,                            \
 341         .ops            = &max77686_ops,                                \
 342         .type           = REGULATOR_VOLTAGE,                            \
 343         .owner          = THIS_MODULE,                                  \
 344         .min_uV         = MAX77686_LDO_LOW_MINUV,                       \
 345         .uV_step        = MAX77686_LDO_LOW_UVSTEP,                      \
 346         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 347         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 348         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 349         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 350         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 351         .enable_mask    = MAX77686_OPMODE_MASK                          \
 352                         << MAX77686_OPMODE_SHIFT,                       \
 353 }
 354 #define regulator_desc_buck(num)                {                       \
 355         .name           = "BUCK"#num,                                   \
 356         .of_match       = of_match_ptr("BUCK"#num),                     \
 357         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 358         .id             = MAX77686_BUCK##num,                           \
 359         .ops            = &max77686_ops,                                \
 360         .type           = REGULATOR_VOLTAGE,                            \
 361         .owner          = THIS_MODULE,                                  \
 362         .min_uV         = MAX77686_BUCK_MINUV,                          \
 363         .uV_step        = MAX77686_BUCK_UVSTEP,                         \
 364         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 365         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 366         .vsel_reg       = MAX77686_REG_BUCK5OUT + (num - 5) * 2,        \
 367         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 368         .enable_reg     = MAX77686_REG_BUCK5CTRL + (num - 5) * 2,       \
 369         .enable_mask    = MAX77686_OPMODE_MASK,                         \
 370 }
 371 #define regulator_desc_buck1(num)               {                       \
 372         .name           = "BUCK"#num,                                   \
 373         .of_match       = of_match_ptr("BUCK"#num),                     \
 374         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 375         .id             = MAX77686_BUCK##num,                           \
 376         .ops            = &max77686_buck1_ops,                          \
 377         .type           = REGULATOR_VOLTAGE,                            \
 378         .owner          = THIS_MODULE,                                  \
 379         .min_uV         = MAX77686_BUCK_MINUV,                          \
 380         .uV_step        = MAX77686_BUCK_UVSTEP,                         \
 381         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 382         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 383         .vsel_reg       = MAX77686_REG_BUCK1OUT,                        \
 384         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 385         .enable_reg     = MAX77686_REG_BUCK1CTRL,                       \
 386         .enable_mask    = MAX77686_OPMODE_MASK,                         \
 387 }
 388 #define regulator_desc_buck_dvs(num)            {                       \
 389         .name           = "BUCK"#num,                                   \
 390         .of_match       = of_match_ptr("BUCK"#num),                     \
 391         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 392         .id             = MAX77686_BUCK##num,                           \
 393         .ops            = &max77686_buck_dvs_ops,                       \
 394         .type           = REGULATOR_VOLTAGE,                            \
 395         .owner          = THIS_MODULE,                                  \
 396         .min_uV         = MAX77686_DVS_MINUV,                           \
 397         .uV_step        = MAX77686_DVS_UVSTEP,                          \
 398         .ramp_delay     = MAX77686_DVS_RAMP_DELAY,                      \
 399         .n_voltages     = MAX77686_DVS_VSEL_MASK + 1,                   \
 400         .vsel_reg       = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10,      \
 401         .vsel_mask      = MAX77686_DVS_VSEL_MASK,                       \
 402         .enable_reg     = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10,     \
 403         .enable_mask    = MAX77686_OPMODE_MASK                          \
 404                         << MAX77686_OPMODE_BUCK234_SHIFT,               \
 405 }
 406
 407 static const struct regulator_desc regulators[] = {
 408         regulator_desc_ldo1_low(1),
 409         regulator_desc_ldo_low(2),
 410         regulator_desc_ldo(3),
 411         regulator_desc_ldo(4),
 412         regulator_desc_ldo(5),
 413         regulator_desc_ldo_low(6),
 414         regulator_desc_ldo_low(7),
 415         regulator_desc_ldo_low(8),
 416         regulator_desc_ldo(9),
 417         regulator_desc_lpm_ldo(10),
 418         regulator_desc_lpm_ldo(11),
 419         regulator_desc_lpm_ldo(12),
 420         regulator_desc_ldo(13),
 421         regulator_desc_lpm_ldo(14),
 422         regulator_desc_ldo_low(15),
 423         regulator_desc_lpm_ldo(16),
 424         regulator_desc_ldo(17),
 425         regulator_desc_ldo(18),
 426         regulator_desc_ldo(19),
 427         regulator_desc_ldo(20),
 428         regulator_desc_ldo(21),
 429         regulator_desc_ldo(22),
 430         regulator_desc_ldo(23),
 431         regulator_desc_ldo(24),
 432         regulator_desc_ldo(25),
 433         regulator_desc_ldo(26),
 434         regulator_desc_buck1(1),
 435         regulator_desc_buck_dvs(2),
 436         regulator_desc_buck_dvs(3),
 437         regulator_desc_buck_dvs(4),
 438         regulator_desc_buck(5),
 439         regulator_desc_buck(6),
 440         regulator_desc_buck(7),
 441         regulator_desc_buck(8),
 442         regulator_desc_buck(9),
 443 };
 444
 445 static int max77686_pmic_probe(struct platform_device *pdev)
 446 {
 447         struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 448         struct max77686_data *max77686;
 449         int i;
 450         struct regulator_config config = { };
 451
 452         dev_dbg(&pdev->dev, "%s\n", __func__);
 453
 454         max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
 455                                 GFP_KERNEL);
 456         if (!max77686)
 457                 return -ENOMEM;
 458
 459         config.dev = iodev->dev;
 460         config.regmap = iodev->regmap;
 461         config.driver_data = max77686;
 462         platform_set_drvdata(pdev, max77686);
 463
 464         for (i = 0; i < MAX77686_REGULATORS; i++) {
 465                 struct regulator_dev *rdev;
 466                 int id = regulators[i].id;
 467
 468                 max77686->opmode[id] = MAX77686_NORMAL;
 469                 rdev = devm_regulator_register(&pdev->dev,
 470                                                 &regulators[i], &config);
 471                 if (IS_ERR(rdev)) {
 472                         int ret = PTR_ERR(rdev);
 473                         dev_err(&pdev->dev,
 474                                 "regulator init failed for %d: %d\n", i, ret);
 475                         return ret;
 476                 }
 477         }
 478
 479         return 0;
 480 }
 481
 482 static const struct platform_device_id max77686_pmic_id[] = {
 483         {"max77686-pmic", 0},
 484         { },
 485 };
 486 MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
 487
 488 static struct platform_driver max77686_pmic_driver = {
 489         .driver = {
 490                 .name = "max77686-pmic",
 491         },
 492         .probe = max77686_pmic_probe,
 493         .id_table = max77686_pmic_id,
 494 };
 495
 496 static int __init max77686_pmic_init(void)
 497 {
 498         return platform_driver_register(&max77686_pmic_driver);
 499 }
 500 subsys_initcall(max77686_pmic_init);
 501
 502 static void __exit max77686_pmic_cleanup(void)
 503 {
 504         platform_driver_unregister(&max77686_pmic_driver);
 505 }
 506 module_exit(max77686_pmic_cleanup);
 507
 508 MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
 509 MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
 510 MODULE_LICENSE("GPL");