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
  23 struct rk808_reg_data {
  24         int addr;
  25         int mask;
  26         int value;
  27 };
  28
  29 static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
  30 {
  31         /*
  32          * Notes:
  33          * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
  34          *   we don't use that feature.  It's better to cache.
  35          * - It's unlikely we care that RK808_DEVCTRL_REG is volatile since
  36          *   bits are cleared in case when we shutoff anyway, but better safe.
  37          */
  38
  39         switch (reg) {
  40         case RK808_SECONDS_REG ... RK808_WEEKS_REG:
  41         case RK808_RTC_STATUS_REG:
  42         case RK808_VB_MON_REG:
  43         case RK808_THERMAL_REG:
  44         case RK808_DCDC_UV_STS_REG:
  45         case RK808_LDO_UV_STS_REG:
  46         case RK808_DCDC_PG_REG:
  47         case RK808_LDO_PG_REG:
  48         case RK808_DEVCTRL_REG:
  49         case RK808_INT_STS_REG1:
  50         case RK808_INT_STS_REG2:
  51                 return true;
  52         }
  53
  54         return false;
  55 }
  56
  57 static bool rk817_is_volatile_reg(struct device *dev, unsigned int reg)
  58 {
  59         /*
  60          * Notes:
  61          * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
  62          *   we don't use that feature.  It's better to cache.
  63          */
  64
  65         switch (reg) {
  66         case RK817_SECONDS_REG ... RK817_WEEKS_REG:
  67         case RK817_RTC_STATUS_REG:
  68         case RK817_INT_STS_REG0:
  69         case RK817_INT_STS_REG1:
  70         case RK817_INT_STS_REG2:
  71         case RK817_SYS_STS:
  72                 return true;
  73         }
  74
  75         return true;
  76 }
  77
  78 static const struct regmap_config rk818_regmap_config = {
  79         .reg_bits = 8,
  80         .val_bits = 8,
  81         .max_register = RK818_USB_CTRL_REG,
  82         .cache_type = REGCACHE_RBTREE,
  83         .volatile_reg = rk808_is_volatile_reg,
  84 };
  85
  86 static const struct regmap_config rk805_regmap_config = {
  87         .reg_bits = 8,
  88         .val_bits = 8,
  89         .max_register = RK805_OFF_SOURCE_REG,
  90         .cache_type = REGCACHE_RBTREE,
  91         .volatile_reg = rk808_is_volatile_reg,
  92 };
  93
  94 static const struct regmap_config rk808_regmap_config = {
  95         .reg_bits = 8,
  96         .val_bits = 8,
  97         .max_register = RK808_IO_POL_REG,
  98         .cache_type = REGCACHE_RBTREE,
  99         .volatile_reg = rk808_is_volatile_reg,
 100 };
 101
 102 static const struct regmap_config rk817_regmap_config = {
 103         .reg_bits = 8,
 104         .val_bits = 8,
 105         .max_register = RK817_GPIO_INT_CFG,
 106         .cache_type = REGCACHE_NONE,
 107         .volatile_reg = rk817_is_volatile_reg,
 108 };
 109
 110 static struct resource rtc_resources[] = {
 111         DEFINE_RES_IRQ(RK808_IRQ_RTC_ALARM),
 112 };
 113
 114 static struct resource rk817_rtc_resources[] = {
 115         DEFINE_RES_IRQ(RK817_IRQ_RTC_ALARM),
 116 };
 117
 118 static struct resource rk805_key_resources[] = {
 119         DEFINE_RES_IRQ(RK805_IRQ_PWRON_RISE),
 120         DEFINE_RES_IRQ(RK805_IRQ_PWRON_FALL),
 121 };
 122
 123 static struct resource rk817_pwrkey_resources[] = {
 124         DEFINE_RES_IRQ(RK817_IRQ_PWRON_RISE),
 125         DEFINE_RES_IRQ(RK817_IRQ_PWRON_FALL),
 126 };
 127
 128 static const struct mfd_cell rk805s[] = {
 129         { .name = "rk808-clkout", },
 130         { .name = "rk808-regulator", },
 131         { .name = "rk805-pinctrl", },
 132         {
 133                 .name = "rk808-rtc",
 134                 .num_resources = ARRAY_SIZE(rtc_resources),
 135                 .resources = &rtc_resources[0],
 136         },
 137         {       .name = "rk805-pwrkey",
 138                 .num_resources = ARRAY_SIZE(rk805_key_resources),
 139                 .resources = &rk805_key_resources[0],
 140         },
 141 };
 142
 143 static const struct mfd_cell rk808s[] = {
 144         { .name = "rk808-clkout", },
 145         { .name = "rk808-regulator", },
 146         {
 147                 .name = "rk808-rtc",
 148                 .num_resources = ARRAY_SIZE(rtc_resources),
 149                 .resources = rtc_resources,
 150         },
 151 };
 152
 153 static const struct mfd_cell rk817s[] = {
 154         { .name = "rk808-clkout",},
 155         { .name = "rk808-regulator",},
 156         {
 157                 .name = "rk805-pwrkey",
 158                 .num_resources = ARRAY_SIZE(rk817_pwrkey_resources),
 159                 .resources = &rk817_pwrkey_resources[0],
 160         },
 161         {
 162                 .name = "rk808-rtc",
 163                 .num_resources = ARRAY_SIZE(rk817_rtc_resources),
 164                 .resources = &rk817_rtc_resources[0],
 165         },
 166 };
 167
 168 static const struct mfd_cell rk818s[] = {
 169         { .name = "rk808-clkout", },
 170         { .name = "rk808-regulator", },
 171         {
 172                 .name = "rk808-rtc",
 173                 .num_resources = ARRAY_SIZE(rtc_resources),
 174                 .resources = rtc_resources,
 175         },
 176 };
 177
 178 static const struct rk808_reg_data rk805_pre_init_reg[] = {
 179         {RK805_BUCK1_CONFIG_REG, RK805_BUCK1_2_ILMAX_MASK,
 180                                  RK805_BUCK1_2_ILMAX_4000MA},
 181         {RK805_BUCK2_CONFIG_REG, RK805_BUCK1_2_ILMAX_MASK,
 182                                  RK805_BUCK1_2_ILMAX_4000MA},
 183         {RK805_BUCK3_CONFIG_REG, RK805_BUCK3_4_ILMAX_MASK,
 184                                  RK805_BUCK3_ILMAX_3000MA},
 185         {RK805_BUCK4_CONFIG_REG, RK805_BUCK3_4_ILMAX_MASK,
 186                                  RK805_BUCK4_ILMAX_3500MA},
 187         {RK805_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_400MA},
 188         {RK805_THERMAL_REG, TEMP_HOTDIE_MSK, TEMP115C},
 189 };
 190
 191 static const struct rk808_reg_data rk808_pre_init_reg[] = {
 192         { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_150MA },
 193         { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_200MA },
 194         { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
 195         { RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK,  BUCK_ILMIN_200MA },
 196         { RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK,  BUCK_ILMIN_200MA },
 197         { RK808_DCDC_UV_ACT_REG,  BUCK_UV_ACT_MASK, BUCK_UV_ACT_DISABLE},
 198         { RK808_VB_MON_REG,       MASK_ALL,         VB_LO_ACT |
 199                                                     VB_LO_SEL_3500MV },
 200 };
 201
 202 static const struct rk808_reg_data rk817_pre_init_reg[] = {
 203         {RK817_RTC_CTRL_REG, RTC_STOP, RTC_STOP},
 204         {RK817_GPIO_INT_CFG, RK817_INT_POL_MSK, RK817_INT_POL_L},
 205         {RK817_SYS_CFG(1), RK817_HOTDIE_TEMP_MSK | RK817_TSD_TEMP_MSK,
 206                                            RK817_HOTDIE_105 | RK817_TSD_140},
 207 };
 208
 209 static const struct rk808_reg_data rk818_pre_init_reg[] = {
 210         /* improve efficiency */
 211         { RK818_BUCK2_CONFIG_REG, BUCK2_RATE_MASK,  BUCK_ILMIN_250MA },
 212         { RK818_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_250MA },
 213         { RK818_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
 214         { RK818_USB_CTRL_REG,     RK818_USB_ILIM_SEL_MASK,
 215                                                     RK818_USB_ILMIN_2000MA },
 216         /* close charger when usb lower then 3.4V */
 217         { RK818_USB_CTRL_REG,     RK818_USB_CHG_SD_VSEL_MASK,
 218                                                     (0x7 << 4) },
 219         /* no action when vref */
 220         { RK818_H5V_EN_REG,       BIT(1),           RK818_REF_RDY_CTRL },
 221         /* enable HDMI 5V */
 222         { RK818_H5V_EN_REG,       BIT(0),           RK818_H5V_EN },
 223         { RK808_VB_MON_REG,       MASK_ALL,         VB_LO_ACT |
 224                                                     VB_LO_SEL_3500MV },
 225 };
 226
 227 static const struct regmap_irq rk805_irqs[] = {
 228         [RK805_IRQ_PWRON_RISE] = {
 229                 .mask = RK805_IRQ_PWRON_RISE_MSK,
 230                 .reg_offset = 0,
 231         },
 232         [RK805_IRQ_VB_LOW] = {
 233                 .mask = RK805_IRQ_VB_LOW_MSK,
 234                 .reg_offset = 0,
 235         },
 236         [RK805_IRQ_PWRON] = {
 237                 .mask = RK805_IRQ_PWRON_MSK,
 238                 .reg_offset = 0,
 239         },
 240         [RK805_IRQ_PWRON_LP] = {
 241                 .mask = RK805_IRQ_PWRON_LP_MSK,
 242                 .reg_offset = 0,
 243         },
 244         [RK805_IRQ_HOTDIE] = {
 245                 .mask = RK805_IRQ_HOTDIE_MSK,
 246                 .reg_offset = 0,
 247         },
 248         [RK805_IRQ_RTC_ALARM] = {
 249                 .mask = RK805_IRQ_RTC_ALARM_MSK,
 250                 .reg_offset = 0,
 251         },
 252         [RK805_IRQ_RTC_PERIOD] = {
 253                 .mask = RK805_IRQ_RTC_PERIOD_MSK,
 254                 .reg_offset = 0,
 255         },
 256         [RK805_IRQ_PWRON_FALL] = {
 257                 .mask = RK805_IRQ_PWRON_FALL_MSK,
 258                 .reg_offset = 0,
 259         },
 260 };
 261
 262 static const struct regmap_irq rk808_irqs[] = {
 263         /* INT_STS */
 264         [RK808_IRQ_VOUT_LO] = {
 265                 .mask = RK808_IRQ_VOUT_LO_MSK,
 266                 .reg_offset = 0,
 267         },
 268         [RK808_IRQ_VB_LO] = {
 269                 .mask = RK808_IRQ_VB_LO_MSK,
 270                 .reg_offset = 0,
 271         },
 272         [RK808_IRQ_PWRON] = {
 273                 .mask = RK808_IRQ_PWRON_MSK,
 274                 .reg_offset = 0,
 275         },
 276         [RK808_IRQ_PWRON_LP] = {
 277                 .mask = RK808_IRQ_PWRON_LP_MSK,
 278                 .reg_offset = 0,
 279         },
 280         [RK808_IRQ_HOTDIE] = {
 281                 .mask = RK808_IRQ_HOTDIE_MSK,
 282                 .reg_offset = 0,
 283         },
 284         [RK808_IRQ_RTC_ALARM] = {
 285                 .mask = RK808_IRQ_RTC_ALARM_MSK,
 286                 .reg_offset = 0,
 287         },
 288         [RK808_IRQ_RTC_PERIOD] = {
 289                 .mask = RK808_IRQ_RTC_PERIOD_MSK,
 290                 .reg_offset = 0,
 291         },
 292
 293         /* INT_STS2 */
 294         [RK808_IRQ_PLUG_IN_INT] = {
 295                 .mask = RK808_IRQ_PLUG_IN_INT_MSK,
 296                 .reg_offset = 1,
 297         },
 298         [RK808_IRQ_PLUG_OUT_INT] = {
 299                 .mask = RK808_IRQ_PLUG_OUT_INT_MSK,
 300                 .reg_offset = 1,
 301         },
 302 };
 303
 304 static const struct regmap_irq rk818_irqs[] = {
 305         /* INT_STS */
 306         [RK818_IRQ_VOUT_LO] = {
 307                 .mask = RK818_IRQ_VOUT_LO_MSK,
 308                 .reg_offset = 0,
 309         },
 310         [RK818_IRQ_VB_LO] = {
 311                 .mask = RK818_IRQ_VB_LO_MSK,
 312                 .reg_offset = 0,
 313         },
 314         [RK818_IRQ_PWRON] = {
 315                 .mask = RK818_IRQ_PWRON_MSK,
 316                 .reg_offset = 0,
 317         },
 318         [RK818_IRQ_PWRON_LP] = {
 319                 .mask = RK818_IRQ_PWRON_LP_MSK,
 320                 .reg_offset = 0,
 321         },
 322         [RK818_IRQ_HOTDIE] = {
 323                 .mask = RK818_IRQ_HOTDIE_MSK,
 324                 .reg_offset = 0,
 325         },
 326         [RK818_IRQ_RTC_ALARM] = {
 327                 .mask = RK818_IRQ_RTC_ALARM_MSK,
 328                 .reg_offset = 0,
 329         },
 330         [RK818_IRQ_RTC_PERIOD] = {
 331                 .mask = RK818_IRQ_RTC_PERIOD_MSK,
 332                 .reg_offset = 0,
 333         },
 334         [RK818_IRQ_USB_OV] = {
 335                 .mask = RK818_IRQ_USB_OV_MSK,
 336                 .reg_offset = 0,
 337         },
 338
 339         /* INT_STS2 */
 340         [RK818_IRQ_PLUG_IN] = {
 341                 .mask = RK818_IRQ_PLUG_IN_MSK,
 342                 .reg_offset = 1,
 343         },
 344         [RK818_IRQ_PLUG_OUT] = {
 345                 .mask = RK818_IRQ_PLUG_OUT_MSK,
 346                 .reg_offset = 1,
 347         },
 348         [RK818_IRQ_CHG_OK] = {
 349                 .mask = RK818_IRQ_CHG_OK_MSK,
 350                 .reg_offset = 1,
 351         },
 352         [RK818_IRQ_CHG_TE] = {
 353                 .mask = RK818_IRQ_CHG_TE_MSK,
 354                 .reg_offset = 1,
 355         },
 356         [RK818_IRQ_CHG_TS1] = {
 357                 .mask = RK818_IRQ_CHG_TS1_MSK,
 358                 .reg_offset = 1,
 359         },
 360         [RK818_IRQ_TS2] = {
 361                 .mask = RK818_IRQ_TS2_MSK,
 362                 .reg_offset = 1,
 363         },
 364         [RK818_IRQ_CHG_CVTLIM] = {
 365                 .mask = RK818_IRQ_CHG_CVTLIM_MSK,
 366                 .reg_offset = 1,
 367         },
 368         [RK818_IRQ_DISCHG_ILIM] = {
 369                 .mask = RK818_IRQ_DISCHG_ILIM_MSK,
 370                 .reg_offset = 1,
 371         },
 372 };
 373
 374 static const struct regmap_irq rk817_irqs[RK817_IRQ_END] = {
 375         REGMAP_IRQ_REG_LINE(0, 8),
 376         REGMAP_IRQ_REG_LINE(1, 8),
 377         REGMAP_IRQ_REG_LINE(2, 8),
 378         REGMAP_IRQ_REG_LINE(3, 8),
 379         REGMAP_IRQ_REG_LINE(4, 8),
 380         REGMAP_IRQ_REG_LINE(5, 8),
 381         REGMAP_IRQ_REG_LINE(6, 8),
 382         REGMAP_IRQ_REG_LINE(7, 8),
 383         REGMAP_IRQ_REG_LINE(8, 8),
 384         REGMAP_IRQ_REG_LINE(9, 8),
 385         REGMAP_IRQ_REG_LINE(10, 8),
 386         REGMAP_IRQ_REG_LINE(11, 8),
 387         REGMAP_IRQ_REG_LINE(12, 8),
 388         REGMAP_IRQ_REG_LINE(13, 8),
 389         REGMAP_IRQ_REG_LINE(14, 8),
 390         REGMAP_IRQ_REG_LINE(15, 8),
 391         REGMAP_IRQ_REG_LINE(16, 8),
 392         REGMAP_IRQ_REG_LINE(17, 8),
 393         REGMAP_IRQ_REG_LINE(18, 8),
 394         REGMAP_IRQ_REG_LINE(19, 8),
 395         REGMAP_IRQ_REG_LINE(20, 8),
 396         REGMAP_IRQ_REG_LINE(21, 8),
 397         REGMAP_IRQ_REG_LINE(22, 8),
 398         REGMAP_IRQ_REG_LINE(23, 8)
 399 };
 400
 401 static struct regmap_irq_chip rk805_irq_chip = {
 402         .name = "rk805",
 403         .irqs = rk805_irqs,
 404         .num_irqs = ARRAY_SIZE(rk805_irqs),
 405         .num_regs = 1,
 406         .status_base = RK805_INT_STS_REG,
 407         .mask_base = RK805_INT_STS_MSK_REG,
 408         .ack_base = RK805_INT_STS_REG,
 409         .init_ack_masked = true,
 410 };
 411
 412 static const struct regmap_irq_chip rk808_irq_chip = {
 413         .name = "rk808",
 414         .irqs = rk808_irqs,
 415         .num_irqs = ARRAY_SIZE(rk808_irqs),
 416         .num_regs = 2,
 417         .irq_reg_stride = 2,
 418         .status_base = RK808_INT_STS_REG1,
 419         .mask_base = RK808_INT_STS_MSK_REG1,
 420         .ack_base = RK808_INT_STS_REG1,
 421         .init_ack_masked = true,
 422 };
 423
 424 static struct regmap_irq_chip rk817_irq_chip = {
 425         .name = "rk817",
 426         .irqs = rk817_irqs,
 427         .num_irqs = ARRAY_SIZE(rk817_irqs),
 428         .num_regs = 3,
 429         .irq_reg_stride = 2,
 430         .status_base = RK817_INT_STS_REG0,
 431         .mask_base = RK817_INT_STS_MSK_REG0,
 432         .ack_base = RK817_INT_STS_REG0,
 433         .init_ack_masked = true,
 434 };
 435
 436 static const struct regmap_irq_chip rk818_irq_chip = {
 437         .name = "rk818",
 438         .irqs = rk818_irqs,
 439         .num_irqs = ARRAY_SIZE(rk818_irqs),
 440         .num_regs = 2,
 441         .irq_reg_stride = 2,
 442         .status_base = RK818_INT_STS_REG1,
 443         .mask_base = RK818_INT_STS_MSK_REG1,
 444         .ack_base = RK818_INT_STS_REG1,
 445         .init_ack_masked = true,
 446 };
 447
 448 static struct i2c_client *rk808_i2c_client;
 449
 450 static void rk808_pm_power_off(void)
 451 {
 452         int ret;
 453         unsigned int reg, bit;
 454         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
 455
 456         switch (rk808->variant) {
 457         case RK805_ID:
 458                 reg = RK805_DEV_CTRL_REG;
 459                 bit = DEV_OFF;
 460                 break;
 461         case RK808_ID:
 462                 reg = RK808_DEVCTRL_REG,
 463                 bit = DEV_OFF_RST;
 464                 break;
 465         case RK818_ID:
 466                 reg = RK818_DEVCTRL_REG;
 467                 bit = DEV_OFF;
 468                 break;
 469         default:
 470                 return;
 471         }
 472         ret = regmap_update_bits(rk808->regmap, reg, bit, bit);
 473         if (ret)
 474                 dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\n");
 475 }
 476
 477 static void rk8xx_shutdown(struct i2c_client *client)
 478 {
 479         struct rk808 *rk808 = i2c_get_clientdata(client);
 480         int ret;
 481
 482         switch (rk808->variant) {
 483         case RK805_ID:
 484                 ret = regmap_update_bits(rk808->regmap,
 485                                          RK805_GPIO_IO_POL_REG,
 486                                          SLP_SD_MSK,
 487                                          SHUTDOWN_FUN);
 488                 break;
 489         case RK809_ID:
 490         case RK817_ID:
 491                 ret = regmap_update_bits(rk808->regmap,
 492                                          RK817_SYS_CFG(3),
 493                                          RK817_SLPPIN_FUNC_MSK,
 494                                          SLPPIN_DN_FUN);
 495                 break;
 496         default:
 497                 return;
 498         }
 499         if (ret)
 500                 dev_warn(&client->dev,
 501                          "Cannot switch to power down function\n");
 502 }
 503
 504 static const struct of_device_id rk808_of_match[] = {
 505         { .compatible = "rockchip,rk805" },
 506         { .compatible = "rockchip,rk808" },
 507         { .compatible = "rockchip,rk809" },
 508         { .compatible = "rockchip,rk817" },
 509         { .compatible = "rockchip,rk818" },
 510         { },
 511 };
 512 MODULE_DEVICE_TABLE(of, rk808_of_match);
 513
 514 static int rk808_probe(struct i2c_client *client,
 515                        const struct i2c_device_id *id)
 516 {
 517         struct device_node *np = client->dev.of_node;
 518         struct rk808 *rk808;
 519         const struct rk808_reg_data *pre_init_reg;
 520         const struct mfd_cell *cells;
 521         int nr_pre_init_regs;
 522         int nr_cells;
 523         int msb, lsb;
 524         unsigned char pmic_id_msb, pmic_id_lsb;
 525         int ret;
 526         int i;
 527
 528         rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL);
 529         if (!rk808)
 530                 return -ENOMEM;
 531
 532         if (of_device_is_compatible(np, "rockchip,rk817") ||
 533             of_device_is_compatible(np, "rockchip,rk809")) {
 534                 pmic_id_msb = RK817_ID_MSB;
 535                 pmic_id_lsb = RK817_ID_LSB;
 536         } else {
 537                 pmic_id_msb = RK808_ID_MSB;
 538                 pmic_id_lsb = RK808_ID_LSB;
 539         }
 540
 541         /* Read chip variant */
 542         msb = i2c_smbus_read_byte_data(client, pmic_id_msb);
 543         if (msb < 0) {
 544                 dev_err(&client->dev, "failed to read the chip id at 0x%x\n",
 545                         RK808_ID_MSB);
 546                 return msb;
 547         }
 548
 549         lsb = i2c_smbus_read_byte_data(client, pmic_id_lsb);
 550         if (lsb < 0) {
 551                 dev_err(&client->dev, "failed to read the chip id at 0x%x\n",
 552                         RK808_ID_LSB);
 553                 return lsb;
 554         }
 555
 556         rk808->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
 557         dev_info(&client->dev, "chip id: 0x%x\n", (unsigned int)rk808->variant);
 558
 559         switch (rk808->variant) {
 560         case RK805_ID:
 561                 rk808->regmap_cfg = &rk805_regmap_config;
 562                 rk808->regmap_irq_chip = &rk805_irq_chip;
 563                 pre_init_reg = rk805_pre_init_reg;
 564                 nr_pre_init_regs = ARRAY_SIZE(rk805_pre_init_reg);
 565                 cells = rk805s;
 566                 nr_cells = ARRAY_SIZE(rk805s);
 567                 break;
 568         case RK808_ID:
 569                 rk808->regmap_cfg = &rk808_regmap_config;
 570                 rk808->regmap_irq_chip = &rk808_irq_chip;
 571                 pre_init_reg = rk808_pre_init_reg;
 572                 nr_pre_init_regs = ARRAY_SIZE(rk808_pre_init_reg);
 573                 cells = rk808s;
 574                 nr_cells = ARRAY_SIZE(rk808s);
 575                 break;
 576         case RK818_ID:
 577                 rk808->regmap_cfg = &rk818_regmap_config;
 578                 rk808->regmap_irq_chip = &rk818_irq_chip;
 579                 pre_init_reg = rk818_pre_init_reg;
 580                 nr_pre_init_regs = ARRAY_SIZE(rk818_pre_init_reg);
 581                 cells = rk818s;
 582                 nr_cells = ARRAY_SIZE(rk818s);
 583                 break;
 584         case RK809_ID:
 585         case RK817_ID:
 586                 rk808->regmap_cfg = &rk817_regmap_config;
 587                 rk808->regmap_irq_chip = &rk817_irq_chip;
 588                 pre_init_reg = rk817_pre_init_reg;
 589                 nr_pre_init_regs = ARRAY_SIZE(rk817_pre_init_reg);
 590                 cells = rk817s;
 591                 nr_cells = ARRAY_SIZE(rk817s);
 592                 break;
 593         default:
 594                 dev_err(&client->dev, "Unsupported RK8XX ID %lu\n",
 595                         rk808->variant);
 596                 return -EINVAL;
 597         }
 598
 599         rk808->i2c = client;
 600         i2c_set_clientdata(client, rk808);
 601
 602         rk808->regmap = devm_regmap_init_i2c(client, rk808->regmap_cfg);
 603         if (IS_ERR(rk808->regmap)) {
 604                 dev_err(&client->dev, "regmap initialization failed\n");
 605                 return PTR_ERR(rk808->regmap);
 606         }
 607
 608         if (!client->irq) {
 609                 dev_err(&client->dev, "No interrupt support, no core IRQ\n");
 610                 return -EINVAL;
 611         }
 612
 613         ret = regmap_add_irq_chip(rk808->regmap, client->irq,
 614                                   IRQF_ONESHOT, -1,
 615                                   rk808->regmap_irq_chip, &rk808->irq_data);
 616         if (ret) {
 617                 dev_err(&client->dev, "Failed to add irq_chip %d\n", ret);
 618                 return ret;
 619         }
 620
 621         for (i = 0; i < nr_pre_init_regs; i++) {
 622                 ret = regmap_update_bits(rk808->regmap,
 623                                         pre_init_reg[i].addr,
 624                                         pre_init_reg[i].mask,
 625                                         pre_init_reg[i].value);
 626                 if (ret) {
 627                         dev_err(&client->dev,
 628                                 "0x%x write err\n",
 629                                 pre_init_reg[i].addr);
 630                         return ret;
 631                 }
 632         }
 633
 634         ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_NONE,
 635                               cells, nr_cells, NULL, 0,
 636                               regmap_irq_get_domain(rk808->irq_data));
 637         if (ret) {
 638                 dev_err(&client->dev, "failed to add MFD devices %d\n", ret);
 639                 goto err_irq;
 640         }
 641
 642         if (of_property_read_bool(np, "rockchip,system-power-controller")) {
 643                 rk808_i2c_client = client;
 644                 pm_power_off = rk808_pm_power_off;
 645         }
 646
 647         return 0;
 648
 649 err_irq:
 650         regmap_del_irq_chip(client->irq, rk808->irq_data);
 651         return ret;
 652 }
 653
 654 static int rk808_remove(struct i2c_client *client)
 655 {
 656         struct rk808 *rk808 = i2c_get_clientdata(client);
 657
 658         regmap_del_irq_chip(client->irq, rk808->irq_data);
 659
 660         /**
 661          * pm_power_off may points to a function from another module.
 662          * Check if the pointer is set by us and only then overwrite it.
 663          */
 664         if (pm_power_off == rk808_pm_power_off)
 665                 pm_power_off = NULL;
 666
 667         return 0;
 668 }
 669
 670 static int __maybe_unused rk8xx_suspend(struct device *dev)
 671 {
 672         struct rk808 *rk808 = i2c_get_clientdata(to_i2c_client(dev));
 673         int ret = 0;
 674
 675         switch (rk808->variant) {
 676         case RK805_ID:
 677                 ret = regmap_update_bits(rk808->regmap,
 678                                          RK805_GPIO_IO_POL_REG,
 679                                          SLP_SD_MSK,
 680                                          SLEEP_FUN);
 681                 break;
 682         case RK809_ID:
 683         case RK817_ID:
 684                 ret = regmap_update_bits(rk808->regmap,
 685                                          RK817_SYS_CFG(3),
 686                                          RK817_SLPPIN_FUNC_MSK,
 687                                          SLPPIN_SLP_FUN);
 688                 break;
 689         default:
 690                 break;
 691         }
 692
 693         return ret;
 694 }
 695
 696 static int __maybe_unused rk8xx_resume(struct device *dev)
 697 {
 698         struct rk808 *rk808 = i2c_get_clientdata(to_i2c_client(dev));
 699         int ret = 0;
 700
 701         switch (rk808->variant) {
 702         case RK809_ID:
 703         case RK817_ID:
 704                 ret = regmap_update_bits(rk808->regmap,
 705                                          RK817_SYS_CFG(3),
 706                                          RK817_SLPPIN_FUNC_MSK,
 707                                          SLPPIN_NULL_FUN);
 708                 break;
 709         default:
 710                 break;
 711         }
 712
 713         return ret;
 714 }
 715 static SIMPLE_DEV_PM_OPS(rk8xx_pm_ops, rk8xx_suspend, rk8xx_resume);
 716
 717 static struct i2c_driver rk808_i2c_driver = {
 718         .driver = {
 719                 .name = "rk808",
 720                 .of_match_table = rk808_of_match,
 721                 .pm = &rk8xx_pm_ops,
 722         },
 723         .probe    = rk808_probe,
 724         .remove   = rk808_remove,
 725         .shutdown = rk8xx_shutdown,
 726 };
 727
 728 module_i2c_driver(rk808_i2c_driver);
 729
 730 MODULE_LICENSE("GPL");
 731 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
 732 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
 733 MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>");
 734 MODULE_DESCRIPTION("RK808/RK818 PMIC driver");