drivers/mfd/rk808.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * MFD core driver for Rockchip RK808/RK818
   4  *
   5  * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
   6  *
   7  * Author: Chris Zhong <zyw@rock-chips.com>
   8  * Author: Zhang Qing <zhangqing@rock-chips.com>
   9  *
  10  * Copyright (C) 2016 PHYTEC Messtechnik GmbH
  11  *
  12  * Author: Wadim Egorov <w.egorov@phytec.de>
  13  */
  14
  15 #include <linux/i2c.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/mfd/rk808.h>
  18 #include <linux/mfd/core.h>
  19 #include <linux/module.h>
  20 #include <linux/of_device.h>
  21 #include <linux/regmap.h>
  22 #include <linux/syscore_ops.h>
  23
  24 struct rk808_reg_data {
  25         int addr;
  26         int mask;
  27         int value;
  28 };
  29
  30 static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
  31 {
  32         /*
  33          * Notes:
  34          * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
  35          *   we don't use that feature.  It's better to cache.
  36          * - It's unlikely we care that RK808_DEVCTRL_REG is volatile since
  37          *   bits are cleared in case when we shutoff anyway, but better safe.
  38          */
  39
  40         switch (reg) {
  41         case RK808_SECONDS_REG ... RK808_WEEKS_REG:
  42         case RK808_RTC_STATUS_REG:
  43         case RK808_VB_MON_REG:
  44         case RK808_THERMAL_REG:
  45         case RK808_DCDC_UV_STS_REG:
  46         case RK808_LDO_UV_STS_REG:
  47         case RK808_DCDC_PG_REG:
  48         case RK808_LDO_PG_REG:
  49         case RK808_DEVCTRL_REG:
  50         case RK808_INT_STS_REG1:
  51         case RK808_INT_STS_REG2:
  52                 return true;
  53         }
  54
  55         return false;
  56 }
  57
  58 static bool rk817_is_volatile_reg(struct device *dev, unsigned int reg)
  59 {
  60         /*
  61          * Notes:
  62          * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
  63          *   we don't use that feature.  It's better to cache.
  64          */
  65
  66         switch (reg) {
  67         case RK817_SECONDS_REG ... RK817_WEEKS_REG:
  68         case RK817_RTC_STATUS_REG:
  69         case RK817_INT_STS_REG0:
  70         case RK817_INT_STS_REG1:
  71         case RK817_INT_STS_REG2:
  72         case RK817_SYS_STS:
  73                 return true;
  74         }
  75
  76         return true;
  77 }
  78
  79 static const struct regmap_config rk818_regmap_config = {
  80         .reg_bits = 8,
  81         .val_bits = 8,
  82         .max_register = RK818_USB_CTRL_REG,
  83         .cache_type = REGCACHE_RBTREE,
  84         .volatile_reg = rk808_is_volatile_reg,
  85 };
  86
  87 static const struct regmap_config rk805_regmap_config = {
  88         .reg_bits = 8,
  89         .val_bits = 8,
  90         .max_register = RK805_OFF_SOURCE_REG,
  91         .cache_type = REGCACHE_RBTREE,
  92         .volatile_reg = rk808_is_volatile_reg,
  93 };
  94
  95 static const struct regmap_config rk808_regmap_config = {
  96         .reg_bits = 8,
  97         .val_bits = 8,
  98         .max_register = RK808_IO_POL_REG,
  99         .cache_type = REGCACHE_RBTREE,
 100         .volatile_reg = rk808_is_volatile_reg,
 101 };
 102
 103 static const struct regmap_config rk817_regmap_config = {
 104         .reg_bits = 8,
 105         .val_bits = 8,
 106         .max_register = RK817_GPIO_INT_CFG,
 107         .cache_type = REGCACHE_NONE,
 108         .volatile_reg = rk817_is_volatile_reg,
 109 };
 110
 111 static struct resource rtc_resources[] = {
 112         DEFINE_RES_IRQ(RK808_IRQ_RTC_ALARM),
 113 };
 114
 115 static struct resource rk817_rtc_resources[] = {
 116         DEFINE_RES_IRQ(RK817_IRQ_RTC_ALARM),
 117 };
 118
 119 static struct resource rk805_key_resources[] = {
 120         DEFINE_RES_IRQ(RK805_IRQ_PWRON_RISE),
 121         DEFINE_RES_IRQ(RK805_IRQ_PWRON_FALL),
 122 };
 123
 124 static struct resource rk817_pwrkey_resources[] = {
 125         DEFINE_RES_IRQ(RK817_IRQ_PWRON_RISE),
 126         DEFINE_RES_IRQ(RK817_IRQ_PWRON_FALL),
 127 };
 128
 129 static const struct mfd_cell rk805s[] = {
 130         { .name = "rk808-clkout", },
 131         { .name = "rk808-regulator", },
 132         { .name = "rk805-pinctrl", },
 133         {
 134                 .name = "rk808-rtc",
 135                 .num_resources = ARRAY_SIZE(rtc_resources),
 136                 .resources = &rtc_resources[0],
 137         },
 138         {       .name = "rk805-pwrkey",
 139                 .num_resources = ARRAY_SIZE(rk805_key_resources),
 140                 .resources = &rk805_key_resources[0],
 141         },
 142 };
 143
 144 static const struct mfd_cell rk808s[] = {
 145         { .name = "rk808-clkout", },
 146         { .name = "rk808-regulator", },
 147         {
 148                 .name = "rk808-rtc",
 149                 .num_resources = ARRAY_SIZE(rtc_resources),
 150                 .resources = rtc_resources,
 151         },
 152 };
 153
 154 static const struct mfd_cell rk817s[] = {
 155         { .name = "rk808-clkout",},
 156         { .name = "rk808-regulator",},
 157         {
 158                 .name = "rk805-pwrkey",
 159                 .num_resources = ARRAY_SIZE(rk817_pwrkey_resources),
 160                 .resources = &rk817_pwrkey_resources[0],
 161         },
 162         {
 163                 .name = "rk808-rtc",
 164                 .num_resources = ARRAY_SIZE(rk817_rtc_resources),
 165                 .resources = &rk817_rtc_resources[0],
 166         },
 167 };
 168
 169 static const struct mfd_cell rk818s[] = {
 170         { .name = "rk808-clkout", },
 171         { .name = "rk808-regulator", },
 172         {
 173                 .name = "rk808-rtc",
 174                 .num_resources = ARRAY_SIZE(rtc_resources),
 175                 .resources = rtc_resources,
 176         },
 177 };
 178
 179 static const struct rk808_reg_data rk805_pre_init_reg[] = {
 180         {RK805_BUCK1_CONFIG_REG, RK805_BUCK1_2_ILMAX_MASK,
 181                                  RK805_BUCK1_2_ILMAX_4000MA},
 182         {RK805_BUCK2_CONFIG_REG, RK805_BUCK1_2_ILMAX_MASK,
 183                                  RK805_BUCK1_2_ILMAX_4000MA},
 184         {RK805_BUCK3_CONFIG_REG, RK805_BUCK3_4_ILMAX_MASK,
 185                                  RK805_BUCK3_ILMAX_3000MA},
 186         {RK805_BUCK4_CONFIG_REG, RK805_BUCK3_4_ILMAX_MASK,
 187                                  RK805_BUCK4_ILMAX_3500MA},
 188         {RK805_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_400MA},
 189         {RK805_GPIO_IO_POL_REG, SLP_SD_MSK, SLEEP_FUN},
 190         {RK805_THERMAL_REG, TEMP_HOTDIE_MSK, TEMP115C},
 191 };
 192
 193 static const struct rk808_reg_data rk808_pre_init_reg[] = {
 194         { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_150MA },
 195         { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_200MA },
 196         { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
 197         { RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK,  BUCK_ILMIN_200MA },
 198         { RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK,  BUCK_ILMIN_200MA },
 199         { RK808_DCDC_UV_ACT_REG,  BUCK_UV_ACT_MASK, BUCK_UV_ACT_DISABLE},
 200         { RK808_VB_MON_REG,       MASK_ALL,         VB_LO_ACT |
 201                                                     VB_LO_SEL_3500MV },
 202 };
 203
 204 static const struct rk808_reg_data rk817_pre_init_reg[] = {
 205         {RK817_RTC_CTRL_REG, RTC_STOP, RTC_STOP},
 206         {RK817_GPIO_INT_CFG, RK817_INT_POL_MSK, RK817_INT_POL_L},
 207         {RK817_SYS_CFG(1), RK817_HOTDIE_TEMP_MSK | RK817_TSD_TEMP_MSK,
 208                                            RK817_HOTDIE_105 | RK817_TSD_140},
 209 };
 210
 211 static const struct rk808_reg_data rk818_pre_init_reg[] = {
 212         /* improve efficiency */
 213         { RK818_BUCK2_CONFIG_REG, BUCK2_RATE_MASK,  BUCK_ILMIN_250MA },
 214         { RK818_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_250MA },
 215         { RK818_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
 216         { RK818_USB_CTRL_REG,     RK818_USB_ILIM_SEL_MASK,
 217                                                     RK818_USB_ILMIN_2000MA },
 218         /* close charger when usb lower then 3.4V */
 219         { RK818_USB_CTRL_REG,     RK818_USB_CHG_SD_VSEL_MASK,
 220                                                     (0x7 << 4) },
 221         /* no action when vref */
 222         { RK818_H5V_EN_REG,       BIT(1),           RK818_REF_RDY_CTRL },
 223         /* enable HDMI 5V */
 224         { RK818_H5V_EN_REG,       BIT(0),           RK818_H5V_EN },
 225         { RK808_VB_MON_REG,       MASK_ALL,         VB_LO_ACT |
 226                                                     VB_LO_SEL_3500MV },
 227 };
 228
 229 static const struct regmap_irq rk805_irqs[] = {
 230         [RK805_IRQ_PWRON_RISE] = {
 231                 .mask = RK805_IRQ_PWRON_RISE_MSK,
 232                 .reg_offset = 0,
 233         },
 234         [RK805_IRQ_VB_LOW] = {
 235                 .mask = RK805_IRQ_VB_LOW_MSK,
 236                 .reg_offset = 0,
 237         },
 238         [RK805_IRQ_PWRON] = {
 239                 .mask = RK805_IRQ_PWRON_MSK,
 240                 .reg_offset = 0,
 241         },
 242         [RK805_IRQ_PWRON_LP] = {
 243                 .mask = RK805_IRQ_PWRON_LP_MSK,
 244                 .reg_offset = 0,
 245         },
 246         [RK805_IRQ_HOTDIE] = {
 247                 .mask = RK805_IRQ_HOTDIE_MSK,
 248                 .reg_offset = 0,
 249         },
 250         [RK805_IRQ_RTC_ALARM] = {
 251                 .mask = RK805_IRQ_RTC_ALARM_MSK,
 252                 .reg_offset = 0,
 253         },
 254         [RK805_IRQ_RTC_PERIOD] = {
 255                 .mask = RK805_IRQ_RTC_PERIOD_MSK,
 256                 .reg_offset = 0,
 257         },
 258         [RK805_IRQ_PWRON_FALL] = {
 259                 .mask = RK805_IRQ_PWRON_FALL_MSK,
 260                 .reg_offset = 0,
 261         },
 262 };
 263
 264 static const struct regmap_irq rk808_irqs[] = {
 265         /* INT_STS */
 266         [RK808_IRQ_VOUT_LO] = {
 267                 .mask = RK808_IRQ_VOUT_LO_MSK,
 268                 .reg_offset = 0,
 269         },
 270         [RK808_IRQ_VB_LO] = {
 271                 .mask = RK808_IRQ_VB_LO_MSK,
 272                 .reg_offset = 0,
 273         },
 274         [RK808_IRQ_PWRON] = {
 275                 .mask = RK808_IRQ_PWRON_MSK,
 276                 .reg_offset = 0,
 277         },
 278         [RK808_IRQ_PWRON_LP] = {
 279                 .mask = RK808_IRQ_PWRON_LP_MSK,
 280                 .reg_offset = 0,
 281         },
 282         [RK808_IRQ_HOTDIE] = {
 283                 .mask = RK808_IRQ_HOTDIE_MSK,
 284                 .reg_offset = 0,
 285         },
 286         [RK808_IRQ_RTC_ALARM] = {
 287                 .mask = RK808_IRQ_RTC_ALARM_MSK,
 288                 .reg_offset = 0,
 289         },
 290         [RK808_IRQ_RTC_PERIOD] = {
 291                 .mask = RK808_IRQ_RTC_PERIOD_MSK,
 292                 .reg_offset = 0,
 293         },
 294
 295         /* INT_STS2 */
 296         [RK808_IRQ_PLUG_IN_INT] = {
 297                 .mask = RK808_IRQ_PLUG_IN_INT_MSK,
 298                 .reg_offset = 1,
 299         },
 300         [RK808_IRQ_PLUG_OUT_INT] = {
 301                 .mask = RK808_IRQ_PLUG_OUT_INT_MSK,
 302                 .reg_offset = 1,
 303         },
 304 };
 305
 306 static const struct regmap_irq rk818_irqs[] = {
 307         /* INT_STS */
 308         [RK818_IRQ_VOUT_LO] = {
 309                 .mask = RK818_IRQ_VOUT_LO_MSK,
 310                 .reg_offset = 0,
 311         },
 312         [RK818_IRQ_VB_LO] = {
 313                 .mask = RK818_IRQ_VB_LO_MSK,
 314                 .reg_offset = 0,
 315         },
 316         [RK818_IRQ_PWRON] = {
 317                 .mask = RK818_IRQ_PWRON_MSK,
 318                 .reg_offset = 0,
 319         },
 320         [RK818_IRQ_PWRON_LP] = {
 321                 .mask = RK818_IRQ_PWRON_LP_MSK,
 322                 .reg_offset = 0,
 323         },
 324         [RK818_IRQ_HOTDIE] = {
 325                 .mask = RK818_IRQ_HOTDIE_MSK,
 326                 .reg_offset = 0,
 327         },
 328         [RK818_IRQ_RTC_ALARM] = {
 329                 .mask = RK818_IRQ_RTC_ALARM_MSK,
 330                 .reg_offset = 0,
 331         },
 332         [RK818_IRQ_RTC_PERIOD] = {
 333                 .mask = RK818_IRQ_RTC_PERIOD_MSK,
 334                 .reg_offset = 0,
 335         },
 336         [RK818_IRQ_USB_OV] = {
 337                 .mask = RK818_IRQ_USB_OV_MSK,
 338                 .reg_offset = 0,
 339         },
 340
 341         /* INT_STS2 */
 342         [RK818_IRQ_PLUG_IN] = {
 343                 .mask = RK818_IRQ_PLUG_IN_MSK,
 344                 .reg_offset = 1,
 345         },
 346         [RK818_IRQ_PLUG_OUT] = {
 347                 .mask = RK818_IRQ_PLUG_OUT_MSK,
 348                 .reg_offset = 1,
 349         },
 350         [RK818_IRQ_CHG_OK] = {
 351                 .mask = RK818_IRQ_CHG_OK_MSK,
 352                 .reg_offset = 1,
 353         },
 354         [RK818_IRQ_CHG_TE] = {
 355                 .mask = RK818_IRQ_CHG_TE_MSK,
 356                 .reg_offset = 1,
 357         },
 358         [RK818_IRQ_CHG_TS1] = {
 359                 .mask = RK818_IRQ_CHG_TS1_MSK,
 360                 .reg_offset = 1,
 361         },
 362         [RK818_IRQ_TS2] = {
 363                 .mask = RK818_IRQ_TS2_MSK,
 364                 .reg_offset = 1,
 365         },
 366         [RK818_IRQ_CHG_CVTLIM] = {
 367                 .mask = RK818_IRQ_CHG_CVTLIM_MSK,
 368                 .reg_offset = 1,
 369         },
 370         [RK818_IRQ_DISCHG_ILIM] = {
 371                 .mask = RK818_IRQ_DISCHG_ILIM_MSK,
 372                 .reg_offset = 1,
 373         },
 374 };
 375
 376 static const struct regmap_irq rk817_irqs[RK817_IRQ_END] = {
 377         REGMAP_IRQ_REG_LINE(0, 8),
 378         REGMAP_IRQ_REG_LINE(1, 8),
 379         REGMAP_IRQ_REG_LINE(2, 8),
 380         REGMAP_IRQ_REG_LINE(3, 8),
 381         REGMAP_IRQ_REG_LINE(4, 8),
 382         REGMAP_IRQ_REG_LINE(5, 8),
 383         REGMAP_IRQ_REG_LINE(6, 8),
 384         REGMAP_IRQ_REG_LINE(7, 8),
 385         REGMAP_IRQ_REG_LINE(8, 8),
 386         REGMAP_IRQ_REG_LINE(9, 8),
 387         REGMAP_IRQ_REG_LINE(10, 8),
 388         REGMAP_IRQ_REG_LINE(11, 8),
 389         REGMAP_IRQ_REG_LINE(12, 8),
 390         REGMAP_IRQ_REG_LINE(13, 8),
 391         REGMAP_IRQ_REG_LINE(14, 8),
 392         REGMAP_IRQ_REG_LINE(15, 8),
 393         REGMAP_IRQ_REG_LINE(16, 8),
 394         REGMAP_IRQ_REG_LINE(17, 8),
 395         REGMAP_IRQ_REG_LINE(18, 8),
 396         REGMAP_IRQ_REG_LINE(19, 8),
 397         REGMAP_IRQ_REG_LINE(20, 8),
 398         REGMAP_IRQ_REG_LINE(21, 8),
 399         REGMAP_IRQ_REG_LINE(22, 8),
 400         REGMAP_IRQ_REG_LINE(23, 8)
 401 };
 402
 403 static struct regmap_irq_chip rk805_irq_chip = {
 404         .name = "rk805",
 405         .irqs = rk805_irqs,
 406         .num_irqs = ARRAY_SIZE(rk805_irqs),
 407         .num_regs = 1,
 408         .status_base = RK805_INT_STS_REG,
 409         .mask_base = RK805_INT_STS_MSK_REG,
 410         .ack_base = RK805_INT_STS_REG,
 411         .init_ack_masked = true,
 412 };
 413
 414 static const struct regmap_irq_chip rk808_irq_chip = {
 415         .name = "rk808",
 416         .irqs = rk808_irqs,
 417         .num_irqs = ARRAY_SIZE(rk808_irqs),
 418         .num_regs = 2,
 419         .irq_reg_stride = 2,
 420         .status_base = RK808_INT_STS_REG1,
 421         .mask_base = RK808_INT_STS_MSK_REG1,
 422         .ack_base = RK808_INT_STS_REG1,
 423         .init_ack_masked = true,
 424 };
 425
 426 static struct regmap_irq_chip rk817_irq_chip = {
 427         .name = "rk817",
 428         .irqs = rk817_irqs,
 429         .num_irqs = ARRAY_SIZE(rk817_irqs),
 430         .num_regs = 3,
 431         .irq_reg_stride = 2,
 432         .status_base = RK817_INT_STS_REG0,
 433         .mask_base = RK817_INT_STS_MSK_REG0,
 434         .ack_base = RK817_INT_STS_REG0,
 435         .init_ack_masked = true,
 436 };
 437
 438 static const struct regmap_irq_chip rk818_irq_chip = {
 439         .name = "rk818",
 440         .irqs = rk818_irqs,
 441         .num_irqs = ARRAY_SIZE(rk818_irqs),
 442         .num_regs = 2,
 443         .irq_reg_stride = 2,
 444         .status_base = RK818_INT_STS_REG1,
 445         .mask_base = RK818_INT_STS_MSK_REG1,
 446         .ack_base = RK818_INT_STS_REG1,
 447         .init_ack_masked = true,
 448 };
 449
 450 static struct i2c_client *rk808_i2c_client;
 451
 452 static void rk805_device_shutdown(void)
 453 {
 454         int ret;
 455         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
 456
 457         if (!rk808)
 458                 return;
 459
 460         ret = regmap_update_bits(rk808->regmap,
 461                                  RK805_DEV_CTRL_REG,
 462                                  DEV_OFF, DEV_OFF);
 463         if (ret)
 464                 dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\n");
 465 }
 466
 467 static void rk805_device_shutdown_prepare(void)
 468 {
 469         int ret;
 470         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
 471
 472         if (!rk808)
 473                 return;
 474
 475         ret = regmap_update_bits(rk808->regmap,
 476                                  RK805_GPIO_IO_POL_REG,
 477                                  SLP_SD_MSK, SHUTDOWN_FUN);
 478         if (ret)
 479                 dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\n");
 480 }
 481
 482 static void rk808_device_shutdown(void)
 483 {
 484         int ret;
 485         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
 486
 487         if (!rk808)
 488                 return;
 489
 490         ret = regmap_update_bits(rk808->regmap,
 491                                  RK808_DEVCTRL_REG,
 492                                  DEV_OFF_RST, DEV_OFF_RST);
 493         if (ret)
 494                 dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\n");
 495 }
 496
 497 static void rk818_device_shutdown(void)
 498 {
 499         int ret;
 500         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
 501
 502         if (!rk808)
 503                 return;
 504
 505         ret = regmap_update_bits(rk808->regmap,
 506                                  RK818_DEVCTRL_REG,
 507                                  DEV_OFF, DEV_OFF);
 508         if (ret)
 509                 dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\n");
 510 }
 511
 512 static void rk8xx_syscore_shutdown(void)
 513 {
 514         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
 515         int ret;
 516
 517         if (system_state == SYSTEM_POWER_OFF &&
 518             (rk808->variant == RK809_ID || rk808->variant == RK817_ID)) {
 519                 ret = regmap_update_bits(rk808->regmap,
 520                                          RK817_SYS_CFG(3),
 521                                          RK817_SLPPIN_FUNC_MSK,
 522                                          SLPPIN_DN_FUN);
 523                 if (ret) {
 524                         dev_warn(&rk808_i2c_client->dev,
 525                                  "Cannot switch to power down function\n");
 526                 }
 527         }
 528 }
 529
 530 static struct syscore_ops rk808_syscore_ops = {
 531         .shutdown = rk8xx_syscore_shutdown,
 532 };
 533
 534 static const struct of_device_id rk808_of_match[] = {
 535         { .compatible = "rockchip,rk805" },
 536         { .compatible = "rockchip,rk808" },
 537         { .compatible = "rockchip,rk809" },
 538         { .compatible = "rockchip,rk817" },
 539         { .compatible = "rockchip,rk818" },
 540         { },
 541 };
 542 MODULE_DEVICE_TABLE(of, rk808_of_match);
 543
 544 static int rk808_probe(struct i2c_client *client,
 545                        const struct i2c_device_id *id)
 546 {
 547         struct device_node *np = client->dev.of_node;
 548         struct rk808 *rk808;
 549         const struct rk808_reg_data *pre_init_reg;
 550         const struct mfd_cell *cells;
 551         int nr_pre_init_regs;
 552         int nr_cells;
 553         int pm_off = 0, msb, lsb;
 554         unsigned char pmic_id_msb, pmic_id_lsb;
 555         int ret;
 556         int i;
 557
 558         rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL);
 559         if (!rk808)
 560                 return -ENOMEM;
 561
 562         if (of_device_is_compatible(np, "rockchip,rk817") ||
 563             of_device_is_compatible(np, "rockchip,rk809")) {
 564                 pmic_id_msb = RK817_ID_MSB;
 565                 pmic_id_lsb = RK817_ID_LSB;
 566         } else {
 567                 pmic_id_msb = RK808_ID_MSB;
 568                 pmic_id_lsb = RK808_ID_LSB;
 569         }
 570
 571         /* Read chip variant */
 572         msb = i2c_smbus_read_byte_data(client, pmic_id_msb);
 573         if (msb < 0) {
 574                 dev_err(&client->dev, "failed to read the chip id at 0x%x\n",
 575                         RK808_ID_MSB);
 576                 return msb;
 577         }
 578
 579         lsb = i2c_smbus_read_byte_data(client, pmic_id_lsb);
 580         if (lsb < 0) {
 581                 dev_err(&client->dev, "failed to read the chip id at 0x%x\n",
 582                         RK808_ID_LSB);
 583                 return lsb;
 584         }
 585
 586         rk808->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
 587         dev_info(&client->dev, "chip id: 0x%x\n", (unsigned int)rk808->variant);
 588
 589         switch (rk808->variant) {
 590         case RK805_ID:
 591                 rk808->regmap_cfg = &rk805_regmap_config;
 592                 rk808->regmap_irq_chip = &rk805_irq_chip;
 593                 pre_init_reg = rk805_pre_init_reg;
 594                 nr_pre_init_regs = ARRAY_SIZE(rk805_pre_init_reg);
 595                 cells = rk805s;
 596                 nr_cells = ARRAY_SIZE(rk805s);
 597                 rk808->pm_pwroff_fn = rk805_device_shutdown;
 598                 rk808->pm_pwroff_prep_fn = rk805_device_shutdown_prepare;
 599                 break;
 600         case RK808_ID:
 601                 rk808->regmap_cfg = &rk808_regmap_config;
 602                 rk808->regmap_irq_chip = &rk808_irq_chip;
 603                 pre_init_reg = rk808_pre_init_reg;
 604                 nr_pre_init_regs = ARRAY_SIZE(rk808_pre_init_reg);
 605                 cells = rk808s;
 606                 nr_cells = ARRAY_SIZE(rk808s);
 607                 rk808->pm_pwroff_fn = rk808_device_shutdown;
 608                 break;
 609         case RK818_ID:
 610                 rk808->regmap_cfg = &rk818_regmap_config;
 611                 rk808->regmap_irq_chip = &rk818_irq_chip;
 612                 pre_init_reg = rk818_pre_init_reg;
 613                 nr_pre_init_regs = ARRAY_SIZE(rk818_pre_init_reg);
 614                 cells = rk818s;
 615                 nr_cells = ARRAY_SIZE(rk818s);
 616                 rk808->pm_pwroff_fn = rk818_device_shutdown;
 617                 break;
 618         case RK809_ID:
 619         case RK817_ID:
 620                 rk808->regmap_cfg = &rk817_regmap_config;
 621                 rk808->regmap_irq_chip = &rk817_irq_chip;
 622                 pre_init_reg = rk817_pre_init_reg;
 623                 nr_pre_init_regs = ARRAY_SIZE(rk817_pre_init_reg);
 624                 cells = rk817s;
 625                 nr_cells = ARRAY_SIZE(rk817s);
 626                 register_syscore_ops(&rk808_syscore_ops);
 627                 break;
 628         default:
 629                 dev_err(&client->dev, "Unsupported RK8XX ID %lu\n",
 630                         rk808->variant);
 631                 return -EINVAL;
 632         }
 633
 634         rk808->i2c = client;
 635         i2c_set_clientdata(client, rk808);
 636
 637         rk808->regmap = devm_regmap_init_i2c(client, rk808->regmap_cfg);
 638         if (IS_ERR(rk808->regmap)) {
 639                 dev_err(&client->dev, "regmap initialization failed\n");
 640                 return PTR_ERR(rk808->regmap);
 641         }
 642
 643         if (!client->irq) {
 644                 dev_err(&client->dev, "No interrupt support, no core IRQ\n");
 645                 return -EINVAL;
 646         }
 647
 648         ret = regmap_add_irq_chip(rk808->regmap, client->irq,
 649                                   IRQF_ONESHOT, -1,
 650                                   rk808->regmap_irq_chip, &rk808->irq_data);
 651         if (ret) {
 652                 dev_err(&client->dev, "Failed to add irq_chip %d\n", ret);
 653                 return ret;
 654         }
 655
 656         for (i = 0; i < nr_pre_init_regs; i++) {
 657                 ret = regmap_update_bits(rk808->regmap,
 658                                         pre_init_reg[i].addr,
 659                                         pre_init_reg[i].mask,
 660                                         pre_init_reg[i].value);
 661                 if (ret) {
 662                         dev_err(&client->dev,
 663                                 "0x%x write err\n",
 664                                 pre_init_reg[i].addr);
 665                         return ret;
 666                 }
 667         }
 668
 669         ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_NONE,
 670                               cells, nr_cells, NULL, 0,
 671                               regmap_irq_get_domain(rk808->irq_data));
 672         if (ret) {
 673                 dev_err(&client->dev, "failed to add MFD devices %d\n", ret);
 674                 goto err_irq;
 675         }
 676
 677         pm_off = of_property_read_bool(np,
 678                                 "rockchip,system-power-controller");
 679         if (pm_off && !pm_power_off) {
 680                 rk808_i2c_client = client;
 681                 pm_power_off = rk808->pm_pwroff_fn;
 682         }
 683
 684         if (pm_off && !pm_power_off_prepare) {
 685                 if (!rk808_i2c_client)
 686                         rk808_i2c_client = client;
 687                 pm_power_off_prepare = rk808->pm_pwroff_prep_fn;
 688         }
 689
 690         return 0;
 691
 692 err_irq:
 693         regmap_del_irq_chip(client->irq, rk808->irq_data);
 694         return ret;
 695 }
 696
 697 static int rk808_remove(struct i2c_client *client)
 698 {
 699         struct rk808 *rk808 = i2c_get_clientdata(client);
 700
 701         regmap_del_irq_chip(client->irq, rk808->irq_data);
 702
 703         /**
 704          * pm_power_off may points to a function from another module.
 705          * Check if the pointer is set by us and only then overwrite it.
 706          */
 707         if (rk808->pm_pwroff_fn && pm_power_off == rk808->pm_pwroff_fn)
 708                 pm_power_off = NULL;
 709
 710         /**
 711          * As above, check if the pointer is set by us before overwrite.
 712          */
 713         if (rk808->pm_pwroff_prep_fn &&
 714             pm_power_off_prepare == rk808->pm_pwroff_prep_fn)
 715                 pm_power_off_prepare = NULL;
 716
 717         return 0;
 718 }
 719
 720 static int __maybe_unused rk8xx_suspend(struct device *dev)
 721 {
 722         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
 723         int ret = 0;
 724
 725         switch (rk808->variant) {
 726         case RK809_ID:
 727         case RK817_ID:
 728                 ret = regmap_update_bits(rk808->regmap,
 729                                          RK817_SYS_CFG(3),
 730                                          RK817_SLPPIN_FUNC_MSK,
 731                                          SLPPIN_SLP_FUN);
 732                 break;
 733         default:
 734                 break;
 735         }
 736
 737         return ret;
 738 }
 739
 740 static int __maybe_unused rk8xx_resume(struct device *dev)
 741 {
 742         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
 743         int ret = 0;
 744
 745         switch (rk808->variant) {
 746         case RK809_ID:
 747         case RK817_ID:
 748                 ret = regmap_update_bits(rk808->regmap,
 749                                          RK817_SYS_CFG(3),
 750                                          RK817_SLPPIN_FUNC_MSK,
 751                                          SLPPIN_NULL_FUN);
 752                 break;
 753         default:
 754                 break;
 755         }
 756
 757         return ret;
 758 }
 759 static SIMPLE_DEV_PM_OPS(rk8xx_pm_ops, rk8xx_suspend, rk8xx_resume);
 760
 761 static struct i2c_driver rk808_i2c_driver = {
 762         .driver = {
 763                 .name = "rk808",
 764                 .of_match_table = rk808_of_match,
 765                 .pm = &rk8xx_pm_ops,
 766         },
 767         .probe    = rk808_probe,
 768         .remove   = rk808_remove,
 769 };
 770
 771 module_i2c_driver(rk808_i2c_driver);
 772
 773 MODULE_LICENSE("GPL");
 774 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
 775 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
 776 MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>");
 777 MODULE_DESCRIPTION("RK808/RK818 PMIC driver");