drivers/mfd/rk808.c

   1 /*
   2  * MFD core driver for Rockchip RK808
   3  *
   4  * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
   5  *
   6  * Author: Chris Zhong <zyw@rock-chips.com>
   7  * Author: Zhang Qing <zhangqing@rock-chips.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms and conditions of the GNU General Public License,
  11  * version 2, as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  16  * more details.
  17  */
  18
  19 #include <linux/i2c.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/kernel.h>
  22 #include <linux/mfd/rk808.h>
  23 #include <linux/mfd/core.h>
  24 #include <linux/module.h>
  25 #include <linux/of_device.h>
  26 #include <linux/regmap.h>
  27
  28 struct rk808_reg_data {
  29         int addr;
  30         int mask;
  31         int value;
  32 };
  33
  34 static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
  35 {
  36         /*
  37          * Notes:
  38          * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
  39          *   we don't use that feature.  It's better to cache.
  40          * - It's unlikely we care that RK808_DEVCTRL_REG is volatile since
  41          *   bits are cleared in case when we shutoff anyway, but better safe.
  42          */
  43
  44         switch (reg) {
  45         case RK808_SECONDS_REG ... RK808_WEEKS_REG:
  46         case RK808_RTC_STATUS_REG:
  47         case RK808_VB_MON_REG:
  48         case RK808_THERMAL_REG:
  49         case RK808_DCDC_UV_STS_REG:
  50         case RK808_LDO_UV_STS_REG:
  51         case RK808_DCDC_PG_REG:
  52         case RK808_LDO_PG_REG:
  53         case RK808_DEVCTRL_REG:
  54         case RK808_INT_STS_REG1:
  55         case RK808_INT_STS_REG2:
  56                 return true;
  57         }
  58
  59         return false;
  60 }
  61
  62 static int rk808_shutdown(struct regmap *regmap)
  63 {
  64         int ret;
  65
  66         ret = regmap_update_bits(regmap,
  67                                  RK808_DEVCTRL_REG,
  68                                  DEV_OFF_RST, DEV_OFF_RST);
  69         return ret;
  70 }
  71
  72 static int rk818_shutdown(struct regmap *regmap)
  73 {
  74         int ret;
  75
  76         ret = regmap_update_bits(regmap,
  77                                  RK818_DEVCTRL_REG,
  78                                  DEV_OFF, DEV_OFF);
  79         return ret;
  80 }
  81
  82 static int rk805_shutdown_prepare(struct regmap *regmap)
  83 {
  84         int ret;
  85
  86         /* close rtc int when power off */
  87         regmap_update_bits(regmap,
  88                            RK808_INT_STS_MSK_REG1,
  89                            (0x3 << 5), (0x3 << 5));
  90         regmap_update_bits(regmap,
  91                            RK808_RTC_INT_REG,
  92                            (0x3 << 2), (0x0 << 2));
  93
  94         /* pmic sleep shutdown function */
  95         ret = regmap_update_bits(regmap,
  96                                  RK805_GPIO_IO_POL_REG,
  97                                  SLP_SD_MSK, SHUTDOWN_FUN);
  98         return ret;
  99 }
 100
 101 static bool rk818_is_volatile_reg(struct device *dev, unsigned int reg)
 102 {
 103         /*
 104          * Notes:
 105          * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
 106          *   we don't use that feature.  It's better to cache.
 107          * - It's unlikely we care that RK808_DEVCTRL_REG is volatile since
 108          *   bits are cleared in case when we shutoff anyway, but better safe.
 109          */
 110
 111         switch (reg) {
 112         case RK808_SECONDS_REG ... RK808_WEEKS_REG:
 113         case RK808_RTC_STATUS_REG:
 114         case RK808_VB_MON_REG:
 115         case RK808_THERMAL_REG:
 116         case RK808_DCDC_EN_REG:
 117         case RK808_DCDC_UV_STS_REG:
 118         case RK808_LDO_UV_STS_REG:
 119         case RK808_DCDC_PG_REG:
 120         case RK808_LDO_PG_REG:
 121         case RK808_DEVCTRL_REG:
 122         case RK808_INT_STS_REG1:
 123         case RK808_INT_STS_REG2:
 124         case RK808_INT_STS_MSK_REG1:
 125         case RK808_INT_STS_MSK_REG2:
 126         case RK818_SUP_STS_REG ... RK818_SAVE_DATA19:
 127                 return true;
 128         }
 129
 130         return false;
 131 }
 132
 133 static const struct regmap_config rk808_regmap_config = {
 134         .reg_bits = 8,
 135         .val_bits = 8,
 136         .max_register = RK808_IO_POL_REG,
 137         .cache_type = REGCACHE_RBTREE,
 138         .volatile_reg = rk808_is_volatile_reg,
 139 };
 140
 141 static const struct regmap_config rk805_regmap_config = {
 142         .reg_bits = 8,
 143         .val_bits = 8,
 144         .max_register = RK805_OFF_SOURCE_REG,
 145         .cache_type = REGCACHE_RBTREE,
 146         .volatile_reg = rk808_is_volatile_reg,
 147 };
 148
 149 static struct resource rtc_resources[] = {
 150         {
 151                 .start  = RK808_IRQ_RTC_ALARM,
 152                 .end    = RK808_IRQ_RTC_ALARM,
 153                 .flags  = IORESOURCE_IRQ,
 154         }
 155 };
 156
 157 static struct resource pwrkey_resources[] = {
 158         {
 159                 .start  = RK805_IRQ_PWRON_RISE,
 160                 .end    = RK805_IRQ_PWRON_RISE,
 161                 .flags  = IORESOURCE_IRQ,
 162         },
 163         {
 164                 .start  = RK805_IRQ_PWRON_FALL,
 165                 .end    = RK805_IRQ_PWRON_FALL,
 166                 .flags  = IORESOURCE_IRQ,
 167         },
 168 };
 169
 170 static const struct mfd_cell rk808s[] = {
 171         { .name = "rk808-clkout", },
 172         { .name = "rk808-regulator", },
 173         {
 174                 .name = "rk808-rtc",
 175                 .num_resources = ARRAY_SIZE(rtc_resources),
 176                 .resources = &rtc_resources[0],
 177         },
 178 };
 179
 180 static const struct rk808_reg_data rk808_pre_init_reg[] = {
 181         { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_150MA },
 182         { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_200MA },
 183         { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
 184         { RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK,  BUCK_ILMIN_200MA },
 185         { RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK,  BUCK_ILMIN_200MA },
 186         { RK808_DCDC_UV_ACT_REG,  BUCK_UV_ACT_MASK, BUCK_UV_ACT_DISABLE},
 187         { RK808_VB_MON_REG,       MASK_ALL,         VB_LO_ACT |
 188                                                     VB_LO_SEL_3500MV },
 189 };
 190
 191 static const struct regmap_irq rk808_irqs[] = {
 192         /* INT_STS */
 193         [RK808_IRQ_VOUT_LO] = {
 194                 .mask = RK808_IRQ_VOUT_LO_MSK,
 195                 .reg_offset = 0,
 196         },
 197         [RK808_IRQ_VB_LO] = {
 198                 .mask = RK808_IRQ_VB_LO_MSK,
 199                 .reg_offset = 0,
 200         },
 201         [RK808_IRQ_PWRON] = {
 202                 .mask = RK808_IRQ_PWRON_MSK,
 203                 .reg_offset = 0,
 204         },
 205         [RK808_IRQ_PWRON_LP] = {
 206                 .mask = RK808_IRQ_PWRON_LP_MSK,
 207                 .reg_offset = 0,
 208         },
 209         [RK808_IRQ_HOTDIE] = {
 210                 .mask = RK808_IRQ_HOTDIE_MSK,
 211                 .reg_offset = 0,
 212         },
 213         [RK808_IRQ_RTC_ALARM] = {
 214                 .mask = RK808_IRQ_RTC_ALARM_MSK,
 215                 .reg_offset = 0,
 216         },
 217         [RK808_IRQ_RTC_PERIOD] = {
 218                 .mask = RK808_IRQ_RTC_PERIOD_MSK,
 219                 .reg_offset = 0,
 220         },
 221
 222         /* INT_STS2 */
 223         [RK808_IRQ_PLUG_IN_INT] = {
 224                 .mask = RK808_IRQ_PLUG_IN_INT_MSK,
 225                 .reg_offset = 1,
 226         },
 227         [RK808_IRQ_PLUG_OUT_INT] = {
 228                 .mask = RK808_IRQ_PLUG_OUT_INT_MSK,
 229                 .reg_offset = 1,
 230         },
 231 };
 232
 233 static struct regmap_irq_chip rk808_irq_chip = {
 234         .name = "rk808",
 235         .irqs = rk808_irqs,
 236         .num_irqs = ARRAY_SIZE(rk808_irqs),
 237         .num_regs = 2,
 238         .irq_reg_stride = 2,
 239         .status_base = RK808_INT_STS_REG1,
 240         .mask_base = RK808_INT_STS_MSK_REG1,
 241         .ack_base = RK808_INT_STS_REG1,
 242         .init_ack_masked = true,
 243 };
 244
 245 static const struct regmap_config rk818_regmap_config = {
 246         .reg_bits = 8,
 247         .val_bits = 8,
 248         .max_register = RK818_SAVE_DATA19,
 249         .cache_type = REGCACHE_RBTREE,
 250         .volatile_reg = rk818_is_volatile_reg,
 251 };
 252
 253 static const struct mfd_cell rk818s[] = {
 254         { .name = "rk808-clkout", },
 255         { .name = "rk808-regulator", },
 256         { .name = "rk818-battery", .of_compatible = "rk818-battery", },
 257         { .name = "rk818-charger", },
 258         {
 259                 .name = "rk808-rtc",
 260                 .num_resources = ARRAY_SIZE(rtc_resources),
 261                 .resources = &rtc_resources[0],
 262         },
 263 };
 264
 265 static const struct rk808_reg_data rk818_pre_init_reg[] = {
 266         { RK818_H5V_EN_REG, REF_RDY_CTRL_ENABLE | H5V_EN_MASK,
 267                                         REF_RDY_CTRL_ENABLE | H5V_EN_ENABLE },
 268         { RK818_DCDC_EN_REG, BOOST_EN_MASK | SWITCH_EN_MASK,
 269                                         BOOST_EN_ENABLE | SWITCH_EN_ENABLE },
 270         { RK818_SLEEP_SET_OFF_REG1, OTG_SLP_SET_MASK, OTG_SLP_SET_OFF },
 271         { RK818_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_250MA },
 272 };
 273
 274 static const struct regmap_irq rk818_irqs[] = {
 275         /* INT_STS */
 276         [RK818_IRQ_VOUT_LO] = {
 277                 .mask = VOUT_LO_MASK,
 278                 .reg_offset = 0,
 279         },
 280         [RK818_IRQ_VB_LO] = {
 281                 .mask = VB_LO_MASK,
 282                 .reg_offset = 0,
 283         },
 284         [RK818_IRQ_PWRON] = {
 285                 .mask = PWRON_MASK,
 286                 .reg_offset = 0,
 287         },
 288         [RK818_IRQ_PWRON_LP] = {
 289                 .mask = PWRON_LP_MASK,
 290                 .reg_offset = 0,
 291         },
 292         [RK818_IRQ_HOTDIE] = {
 293                 .mask = HOTDIE_MASK,
 294                 .reg_offset = 0,
 295         },
 296         [RK818_IRQ_RTC_ALARM] = {
 297                 .mask = RTC_ALARM_MASK,
 298                 .reg_offset = 0,
 299         },
 300         [RK818_IRQ_RTC_PERIOD] = {
 301                 .mask = RTC_PERIOD_MASK,
 302                 .reg_offset = 0,
 303         },
 304         [RK818_IRQ_USB_OV] = {
 305                 .mask = USB_OV_MASK,
 306                 .reg_offset = 0,
 307         },
 308         /* INT_STS2 */
 309         [RK818_IRQ_PLUG_IN] = {
 310                 .mask = PLUG_IN_MASK,
 311                 .reg_offset = 1,
 312         },
 313         [RK818_IRQ_PLUG_OUT] = {
 314                 .mask = PLUG_OUT_MASK,
 315                 .reg_offset = 1,
 316         },
 317         [RK818_IRQ_CHG_OK] = {
 318                 .mask = CHGOK_MASK,
 319                 .reg_offset = 1,
 320         },
 321         [RK818_IRQ_CHG_TE] = {
 322                 .mask = CHGTE_MASK,
 323                 .reg_offset = 1,
 324         },
 325         [RK818_IRQ_CHG_TS1] = {
 326                 .mask = CHGTS1_MASK,
 327                 .reg_offset = 1,
 328         },
 329         [RK818_IRQ_TS2] = {
 330                 .mask = TS2_MASK,
 331                 .reg_offset = 1,
 332         },
 333         [RK818_IRQ_CHG_CVTLIM] = {
 334                 .mask = CHG_CVTLIM_MASK,
 335                 .reg_offset = 1,
 336         },
 337         [RK818_IRQ_DISCHG_ILIM] = {
 338                 .mask = DISCHG_ILIM_MASK,
 339                 .reg_offset = 1,
 340         },
 341 };
 342
 343 static struct regmap_irq_chip rk818_irq_chip = {
 344         .name = "rk818",
 345         .irqs = rk818_irqs,
 346         .num_irqs = ARRAY_SIZE(rk818_irqs),
 347         .num_regs = 2,
 348         .irq_reg_stride = 2,
 349         .status_base = RK808_INT_STS_REG1,
 350         .mask_base = RK808_INT_STS_MSK_REG1,
 351         .ack_base = RK808_INT_STS_REG1,
 352         .init_ack_masked = true,
 353 };
 354
 355 static const struct regmap_irq rk805_irqs[] = {
 356         [RK805_IRQ_PWRON_RISE] = {
 357                 .mask = RK805_IRQ_PWRON_RISE_MSK,
 358                 .reg_offset = 0,
 359         },
 360         [RK805_IRQ_VB_LOW] = {
 361                 .mask = RK805_IRQ_VB_LOW_MSK,
 362                 .reg_offset = 0,
 363         },
 364         [RK805_IRQ_PWRON] = {
 365                 .mask = RK805_IRQ_PWRON_MSK,
 366                 .reg_offset = 0,
 367         },
 368         [RK805_IRQ_PWRON_LP] = {
 369                 .mask = RK805_IRQ_PWRON_LP_MSK,
 370                 .reg_offset = 0,
 371         },
 372         [RK805_IRQ_HOTDIE] = {
 373                 .mask = RK805_IRQ_HOTDIE_MSK,
 374                 .reg_offset = 0,
 375         },
 376         [RK805_IRQ_RTC_ALARM] = {
 377                 .mask = RK805_IRQ_RTC_ALARM_MSK,
 378                 .reg_offset = 0,
 379         },
 380         [RK805_IRQ_RTC_PERIOD] = {
 381                 .mask = RK805_IRQ_RTC_PERIOD_MSK,
 382                 .reg_offset = 0,
 383         },
 384         [RK805_IRQ_PWRON_FALL] = {
 385                 .mask = RK805_IRQ_PWRON_FALL_MSK,
 386                 .reg_offset = 0,
 387         },
 388 };
 389
 390 static struct regmap_irq_chip rk805_irq_chip = {
 391         .name = "rk805",
 392         .irqs = rk805_irqs,
 393         .num_irqs = ARRAY_SIZE(rk805_irqs),
 394         .num_regs = 1,
 395         .status_base = RK805_INT_STS_REG,
 396         .mask_base = RK805_INT_STS_MSK_REG,
 397         .ack_base = RK805_INT_STS_REG,
 398         .init_ack_masked = true,
 399 };
 400
 401 static const struct mfd_cell rk805s[] = {
 402         { .name = "rk818-regulator", },
 403         { .name = "rk8xx-gpio", },
 404         {
 405                 .name = "rk8xx-pwrkey",
 406                 .num_resources = ARRAY_SIZE(pwrkey_resources),
 407                 .resources = &pwrkey_resources[0],
 408         },
 409         {
 410                 .name = "rk808-rtc",
 411                 .num_resources = ARRAY_SIZE(rtc_resources),
 412                 .resources = &rtc_resources[0],
 413         },
 414 };
 415
 416 static const struct rk808_reg_data rk805_pre_init_reg[] = {
 417         {RK805_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_400MA},
 418         {RK805_GPIO_IO_POL_REG, SLP_SD_MSK, SLEEP_FUN},
 419         {RK805_THERMAL_REG, TEMP_HOTDIE_MSK, TEMP115C},
 420 };
 421
 422 static int (*pm_shutdown)(struct regmap *regmap);
 423 static int (*pm_shutdown_prepare)(struct regmap *regmap);
 424 static struct i2c_client *rk808_i2c_client;
 425
 426 static void rk808_device_shutdown_prepare(void)
 427 {
 428         int ret;
 429         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
 430
 431         if (!rk808) {
 432                 dev_warn(&rk808_i2c_client->dev,
 433                          "have no rk808, so do nothing here\n");
 434                 return;
 435         }
 436
 437         if (pm_shutdown_prepare) {
 438                 ret = pm_shutdown_prepare(rk808->regmap);
 439                 if (ret)
 440                         dev_err(&rk808_i2c_client->dev,
 441                                 "power off prepare error!\n");
 442         }
 443 }
 444
 445 static void rk808_device_shutdown(void)
 446 {
 447         int ret;
 448         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
 449
 450         if (!rk808) {
 451                 dev_warn(&rk808_i2c_client->dev,
 452                          "have no rk808, so do nothing here\n");
 453                 return;
 454         }
 455
 456         /* close rtc int when power off */
 457         regmap_update_bits(rk808->regmap,
 458                            RK808_INT_STS_MSK_REG1,
 459                            (0x3 << 5), (0x3 << 5));
 460         regmap_update_bits(rk808->regmap,
 461                            RK808_RTC_INT_REG,
 462                            (0x3 << 2), (0x0 << 2));
 463         if (pm_shutdown) {
 464                 ret = pm_shutdown(rk808->regmap);
 465                 if (ret)
 466                         dev_err(&rk808_i2c_client->dev, "power off error!\n");
 467         }
 468 }
 469
 470 static ssize_t rk8xx_dbg_store(struct device *dev,
 471                                struct device_attribute *attr,
 472                                const char *buf, size_t count)
 473 {
 474         int ret;
 475         char cmd;
 476         u32 input[2], addr, data;
 477         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
 478
 479         ret = sscanf(buf, "%c ", &cmd);
 480         switch (cmd) {
 481         case 'w':
 482                 ret = sscanf(buf, "%c %x %x ", &cmd, &input[0], &input[1]);
 483                 if (ret != 3) {
 484                         pr_err("erro! cmd format: echo w [addr] [value]\n");
 485                         goto out;
 486                 };
 487                 addr = input[0] & 0xff;
 488                 data = input[1] & 0xff;
 489                 pr_info("cmd : %c %x %x\n\n", cmd, input[0], input[1]);
 490                 regmap_write(rk808->regmap, addr, data);
 491                 regmap_read(rk808->regmap, addr, &data);
 492                 pr_info("new: %x %x\n", addr, data);
 493                 break;
 494         case 'r':
 495                 ret = sscanf(buf, "%c %x ", &cmd, &input[0]);
 496                 if (ret != 2) {
 497                         pr_err("erro! cmd format: echo r [addr]\n");
 498                         goto out;
 499                 };
 500                 pr_info("cmd : %c %x\n\n", cmd, input[0]);
 501                 addr = input[0] & 0xff;
 502                 regmap_read(rk808->regmap, addr, &data);
 503                 pr_info("%x %x\n", input[0], data);
 504                 break;
 505         default:
 506                 pr_err("Unknown command\n");
 507                 break;
 508         }
 509
 510 out:
 511         return count;
 512 }
 513
 514 static struct kobject *rk8xx_kobj;
 515 static struct device_attribute rk8xx_attrs =
 516                 __ATTR(rk8xx_dbg, 0200, NULL, rk8xx_dbg_store);
 517
 518 static const struct of_device_id rk808_of_match[] = {
 519         { .compatible = "rockchip,rk805" },
 520         { .compatible = "rockchip,rk808" },
 521         { .compatible = "rockchip,rk818" },
 522         { },
 523 };
 524
 525 MODULE_DEVICE_TABLE(of, rk808_of_match);
 526
 527 static int rk808_probe(struct i2c_client *client,
 528                        const struct i2c_device_id *id)
 529 {
 530         struct device_node *np = client->dev.of_node;
 531         struct rk808 *rk808;
 532         int (*pm_shutdown_fn)(struct regmap *regmap) = NULL;
 533         int (*pm_shutdown_prepare_fn)(struct regmap *regmap) = NULL;
 534         const struct rk808_reg_data *pre_init_reg;
 535         const struct regmap_config *regmap_config;
 536         const struct regmap_irq_chip *irq_chip;
 537         const struct mfd_cell *cell;
 538         u8 on_source = 0, off_source = 0;
 539         int msb, lsb, reg_num, cell_num;
 540         int ret, i, pm_off = 0;
 541         unsigned int on, off;
 542
 543         if (!client->irq) {
 544                 dev_err(&client->dev, "No interrupt support, no core IRQ\n");
 545                 return -EINVAL;
 546         }
 547
 548         rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL);
 549         if (!rk808)
 550                 return -ENOMEM;
 551
 552         /* read Chip variant */
 553         msb = i2c_smbus_read_byte_data(client, RK808_ID_MSB);
 554         if (msb < 0) {
 555                 dev_err(&client->dev, "failed to read the chip id at 0x%x\n",
 556                         RK808_ID_MSB);
 557                 return msb;
 558         }
 559
 560         lsb = i2c_smbus_read_byte_data(client, RK808_ID_LSB);
 561         if (lsb < 0) {
 562                 dev_err(&client->dev, "failed to read the chip id at 0x%x\n",
 563                         RK808_ID_LSB);
 564                 return lsb;
 565         }
 566
 567         rk808->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
 568         dev_info(&client->dev, "Pmic Chip id: 0x%lx\n", rk808->variant);
 569
 570         /* set Chip platform init data*/
 571         switch (rk808->variant) {
 572         case RK818_ID:
 573                 cell = rk818s;
 574                 cell_num = ARRAY_SIZE(rk818s);
 575                 pre_init_reg = rk818_pre_init_reg;
 576                 reg_num = ARRAY_SIZE(rk818_pre_init_reg);
 577                 regmap_config = &rk818_regmap_config;
 578                 irq_chip = &rk818_irq_chip;
 579                 pm_shutdown_fn = rk818_shutdown;
 580                 on_source = RK818_ON_SOURCE_REG;
 581                 off_source = RK818_OFF_SOURCE_REG;
 582                 break;
 583         case RK808_ID:
 584                 cell = rk808s;
 585                 cell_num = ARRAY_SIZE(rk808s);
 586                 pre_init_reg = rk808_pre_init_reg;
 587                 reg_num = ARRAY_SIZE(rk808_pre_init_reg);
 588                 regmap_config = &rk808_regmap_config;
 589                 irq_chip = &rk808_irq_chip;
 590                 pm_shutdown_fn = rk808_shutdown;
 591                 break;
 592         case RK805_ID:
 593                 cell = rk805s;
 594                 cell_num = ARRAY_SIZE(rk805s);
 595                 pre_init_reg = rk805_pre_init_reg;
 596                 reg_num = ARRAY_SIZE(rk805_pre_init_reg);
 597                 regmap_config = &rk805_regmap_config;
 598                 irq_chip = &rk805_irq_chip;
 599                 pm_shutdown_prepare_fn = rk805_shutdown_prepare;
 600                 on_source = RK805_ON_SOURCE_REG;
 601                 off_source = RK805_OFF_SOURCE_REG;
 602                 break;
 603         default:
 604                 dev_err(&client->dev, "unsupported RK8XX ID 0x%lx\n",
 605                         rk808->variant);
 606                 return -EINVAL;
 607         }
 608
 609         rk808->regmap = devm_regmap_init_i2c(client, regmap_config);
 610         if (IS_ERR(rk808->regmap)) {
 611                 dev_err(&client->dev, "regmap initialization failed\n");
 612                 return PTR_ERR(rk808->regmap);
 613         }
 614
 615         /* on & off source */
 616         if (on_source && off_source) {
 617                 ret = regmap_read(rk808->regmap, on_source, &on);
 618                 if (ret) {
 619                         dev_err(&client->dev, "read 0x%x failed\n", on_source);
 620                         return ret;
 621                 }
 622
 623                 ret = regmap_read(rk808->regmap, off_source, &off);
 624                 if (ret) {
 625                         dev_err(&client->dev, "read 0x%x failed\n", off_source);
 626                         return ret;
 627                 }
 628
 629                 dev_info(&client->dev, "source: on=0x%02x, off=0x%02x\n",
 630                          on, off);
 631         }
 632
 633         for (i = 0; i < reg_num; i++) {
 634                 ret = regmap_update_bits(rk808->regmap,
 635                                          pre_init_reg[i].addr,
 636                                          pre_init_reg[i].mask,
 637                                          pre_init_reg[i].value);
 638                 if (ret) {
 639                         dev_err(&client->dev,
 640                                 "0x%x write err\n",
 641                                 pre_init_reg[i].addr);
 642                         return ret;
 643                 }
 644         }
 645
 646         ret = regmap_add_irq_chip(rk808->regmap, client->irq,
 647                                   IRQF_ONESHOT, -1,
 648                                   irq_chip, &rk808->irq_data);
 649         if (ret) {
 650                 dev_err(&client->dev, "Failed to add irq_chip %d\n", ret);
 651                 return ret;
 652         }
 653
 654         rk808->i2c = client;
 655         i2c_set_clientdata(client, rk808);
 656
 657         ret = mfd_add_devices(&client->dev, -1,
 658                               cell, cell_num,
 659                               NULL, 0, regmap_irq_get_domain(rk808->irq_data));
 660         if (ret) {
 661                 dev_err(&client->dev, "failed to add MFD devices %d\n", ret);
 662                 goto err_irq;
 663         }
 664
 665         pm_off = of_property_read_bool(np,
 666                                 "rockchip,system-power-controller");
 667         if (pm_off) {
 668                 rk808_i2c_client = client;
 669                 if (pm_shutdown_prepare_fn) {
 670                         pm_shutdown_prepare = pm_shutdown_prepare_fn;
 671                         pm_power_off_prepare = rk808_device_shutdown_prepare;
 672                 }
 673                 if (pm_shutdown_fn) {
 674                         pm_shutdown = pm_shutdown_fn;
 675                         pm_power_off = rk808_device_shutdown;
 676                 }
 677         }
 678
 679         rk8xx_kobj = kobject_create_and_add("rk8xx", NULL);
 680         if (rk8xx_kobj) {
 681                 ret = sysfs_create_file(rk8xx_kobj, &rk8xx_attrs.attr);
 682                 if (ret)
 683                         dev_err(&client->dev, "create rk8xx sysfs error\n");
 684         }
 685
 686         return 0;
 687
 688 err_irq:
 689         regmap_del_irq_chip(client->irq, rk808->irq_data);
 690         return ret;
 691 }
 692
 693 static int rk808_remove(struct i2c_client *client)
 694 {
 695         struct rk808 *rk808 = i2c_get_clientdata(client);
 696
 697         regmap_del_irq_chip(client->irq, rk808->irq_data);
 698         mfd_remove_devices(&client->dev);
 699         if (pm_power_off == rk808_device_shutdown)
 700                 pm_power_off = NULL;
 701         if (pm_power_off_prepare == rk808_device_shutdown_prepare)
 702                 pm_power_off_prepare = NULL;
 703
 704         return 0;
 705 }
 706
 707 static const struct i2c_device_id rk808_ids[] = {
 708         { "rk805" },
 709         { "rk808" },
 710         { "rk818" },
 711         { },
 712 };
 713 MODULE_DEVICE_TABLE(i2c, rk808_ids);
 714
 715 static struct i2c_driver rk808_i2c_driver = {
 716         .driver = {
 717                 .name = "rk808",
 718                 .of_match_table = rk808_of_match,
 719         },
 720         .probe    = rk808_probe,
 721         .remove   = rk808_remove,
 722         .id_table = rk808_ids,
 723 };
 724
 725 module_i2c_driver(rk808_i2c_driver);
 726
 727 MODULE_LICENSE("GPL");
 728 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
 729 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
 730 MODULE_AUTHOR("Chen jianhong <chenjh@rock-chips.com>");
 731 MODULE_DESCRIPTION("RK808 PMIC driver");