drivers/regulator/rtq2208-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2
   3 #include <linux/bitops.h>
   4 #include <linux/bitfield.h>
   5 #include <linux/util_macros.h>
   6 #include <linux/module.h>
   7 #include <linux/i2c.h>
   8 #include <linux/regmap.h>
   9 #include <linux/regulator/driver.h>
  10 #include <linux/regulator/machine.h>
  11 #include <linux/regulator/of_regulator.h>
  12 #include <linux/mod_devicetable.h>
  13
  14 /* Register */
  15 #define RTQ2208_REG_GLOBAL_INT1                 0x12
  16 #define RTQ2208_REG_FLT_RECORDBUCK_CB           0x18
  17 #define RTQ2208_REG_GLOBAL_INT1_MASK            0x1D
  18 #define RTQ2208_REG_FLT_MASKBUCK_CB             0x1F
  19 #define RTQ2208_REG_BUCK_C_CFG0                 0x32
  20 #define RTQ2208_REG_BUCK_B_CFG0                 0x42
  21 #define RTQ2208_REG_BUCK_A_CFG0                 0x52
  22 #define RTQ2208_REG_BUCK_D_CFG0                 0x62
  23 #define RTQ2208_REG_BUCK_G_CFG0                 0x72
  24 #define RTQ2208_REG_BUCK_F_CFG0                 0x82
  25 #define RTQ2208_REG_BUCK_E_CFG0                 0x92
  26 #define RTQ2208_REG_BUCK_H_CFG0                 0xA2
  27 #define RTQ2208_REG_LDO1_CFG                    0xB1
  28 #define RTQ2208_REG_LDO2_CFG                    0xC1
  29 #define RTQ2208_REG_LDO_DVS_CTRL                0xD0
  30
  31 /* Mask */
  32 #define RTQ2208_BUCK_NR_MTP_SEL_MASK            GENMASK(7, 0)
  33 #define RTQ2208_BUCK_EN_NR_MTP_SEL0_MASK        BIT(0)
  34 #define RTQ2208_BUCK_EN_NR_MTP_SEL1_MASK        BIT(1)
  35 #define RTQ2208_BUCK_RSPUP_MASK                 GENMASK(6, 4)
  36 #define RTQ2208_BUCK_RSPDN_MASK                 GENMASK(2, 0)
  37 #define RTQ2208_BUCK_NRMODE_MASK                BIT(5)
  38 #define RTQ2208_BUCK_STRMODE_MASK               BIT(5)
  39 #define RTQ2208_BUCK_EN_STR_MASK                BIT(0)
  40 #define RTQ2208_LDO_EN_STR_MASK                 BIT(7)
  41 #define RTQ2208_EN_DIS_MASK                     BIT(0)
  42 #define RTQ2208_BUCK_RAMP_SEL_MASK              GENMASK(2, 0)
  43 #define RTQ2208_HD_INT_MASK                     BIT(0)
  44 #define RTQ2208_LDO1_DISCHG_EN_MASK             BIT(4)
  45 #define RTQ2208_LDO1_VOSEL_SD_MASK              BIT(5)
  46 #define RTQ2208_LDO2_DISCHG_EN_MASK             BIT(6)
  47 #define RTQ2208_LDO2_VOSEL_SD_MASK              BIT(7)
  48
  49 /* Size */
  50 #define RTQ2208_VOUT_MAXNUM                     256
  51 #define RTQ2208_BUCK_NUM_IRQ_REGS               5
  52 #define RTQ2208_STS_NUM_IRQ_REGS                2
  53
  54 /* Value */
  55 #define RTQ2208_RAMP_VALUE_MIN_uV               500
  56 #define RTQ2208_RAMP_VALUE_MAX_uV               16000
  57
  58 #define RTQ2208_BUCK_MASK(uv_irq, ov_irq)       (1 << ((uv_irq) % 8) | 1 << ((ov_irq) % 8))
  59
  60 enum {
  61         RTQ2208_BUCK_B = 0,
  62         RTQ2208_BUCK_C,
  63         RTQ2208_BUCK_D,
  64         RTQ2208_BUCK_A,
  65         RTQ2208_BUCK_F,
  66         RTQ2208_BUCK_G,
  67         RTQ2208_BUCK_H,
  68         RTQ2208_BUCK_E,
  69         RTQ2208_LDO2,
  70         RTQ2208_LDO1,
  71         RTQ2208_LDO_MAX,
  72 };
  73
  74 enum {
  75         RTQ2208_AUTO_MODE = 0,
  76         RTQ2208_FCCM,
  77 };
  78
  79 struct rtq2208_regulator_desc {
  80         struct regulator_desc desc;
  81         unsigned int mtp_sel_reg;
  82         unsigned int mtp_sel_mask;
  83         unsigned int mode_reg;
  84         unsigned int mode_mask;
  85         unsigned int suspend_config_reg;
  86         unsigned int suspend_enable_mask;
  87         unsigned int suspend_mode_mask;
  88 };
  89
  90 struct rtq2208_rdev_map {
  91         struct regulator_dev *rdev[RTQ2208_LDO_MAX];
  92         struct regmap *regmap;
  93         struct device *dev;
  94 };
  95
  96 /* set Normal Auto/FCCM mode */
  97 static int rtq2208_set_mode(struct regulator_dev *rdev, unsigned int mode)
  98 {
  99         const struct rtq2208_regulator_desc *rdesc =
 100                 (const struct rtq2208_regulator_desc *)rdev->desc;
 101         unsigned int val, shift;
 102
 103         switch (mode) {
 104         case REGULATOR_MODE_NORMAL:
 105                 val = RTQ2208_AUTO_MODE;
 106                 break;
 107         case REGULATOR_MODE_FAST:
 108                 val = RTQ2208_FCCM;
 109                 break;
 110         default:
 111                 return -EINVAL;
 112         }
 113
 114         shift = ffs(rdesc->mode_mask) - 1;
 115         return regmap_update_bits(rdev->regmap, rdesc->mode_reg,
 116                                   rdesc->mode_mask, val << shift);
 117 }
 118
 119 static unsigned int rtq2208_get_mode(struct regulator_dev *rdev)
 120 {
 121         const struct rtq2208_regulator_desc *rdesc =
 122                 (const struct rtq2208_regulator_desc *)rdev->desc;
 123         unsigned int mode_val;
 124         int ret;
 125
 126         ret = regmap_read(rdev->regmap, rdesc->mode_reg, &mode_val);
 127         if (ret)
 128                 return REGULATOR_MODE_INVALID;
 129
 130         return (mode_val & rdesc->mode_mask) ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;
 131 }
 132
 133 static int rtq2208_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 134 {
 135         const struct regulator_desc *desc = rdev->desc;
 136         unsigned int sel = 0, val;
 137
 138         ramp_delay = max(ramp_delay, RTQ2208_RAMP_VALUE_MIN_uV);
 139         ramp_delay = min(ramp_delay, RTQ2208_RAMP_VALUE_MAX_uV);
 140
 141         ramp_delay /= RTQ2208_RAMP_VALUE_MIN_uV;
 142
 143         /*
 144          * fls(ramp_delay) - 1: doing LSB shift, let it starts from 0
 145          *
 146          * RTQ2208_BUCK_RAMP_SEL_MASK - sel: doing descending order shifting.
 147          * Because the relation of seleltion and value is like that
 148          *
 149          * seletion: value
 150          * 010: 16mv
 151          * ...
 152          * 111: 0.5mv
 153          *
 154          * For example, if I would like to select 16mv, the fls(ramp_delay) - 1 will be 0b010,
 155          * and I need to use 0b111 - sel to do the shifting
 156          */
 157
 158         sel = fls(ramp_delay) - 1;
 159         sel = RTQ2208_BUCK_RAMP_SEL_MASK - sel;
 160
 161         val = FIELD_PREP(RTQ2208_BUCK_RSPUP_MASK, sel) | FIELD_PREP(RTQ2208_BUCK_RSPDN_MASK, sel);
 162
 163         return regmap_update_bits(rdev->regmap, desc->ramp_reg,
 164                                   RTQ2208_BUCK_RSPUP_MASK | RTQ2208_BUCK_RSPDN_MASK, val);
 165 }
 166
 167 static int rtq2208_set_suspend_enable(struct regulator_dev *rdev)
 168 {
 169         const struct rtq2208_regulator_desc *rdesc =
 170                 (const struct rtq2208_regulator_desc *)rdev->desc;
 171
 172         return regmap_set_bits(rdev->regmap, rdesc->suspend_config_reg, rdesc->suspend_enable_mask);
 173 }
 174
 175 static int rtq2208_set_suspend_disable(struct regulator_dev *rdev)
 176 {
 177         const struct rtq2208_regulator_desc *rdesc =
 178                 (const struct rtq2208_regulator_desc *)rdev->desc;
 179
 180         return regmap_update_bits(rdev->regmap, rdesc->suspend_config_reg, rdesc->suspend_enable_mask, 0);
 181 }
 182
 183 static int rtq2208_set_suspend_mode(struct regulator_dev *rdev, unsigned int mode)
 184 {
 185         const struct rtq2208_regulator_desc *rdesc =
 186                 (const struct rtq2208_regulator_desc *)rdev->desc;
 187         unsigned int val, shift;
 188
 189         switch (mode) {
 190         case REGULATOR_MODE_NORMAL:
 191                 val = RTQ2208_AUTO_MODE;
 192                 break;
 193         case REGULATOR_MODE_FAST:
 194                 val = RTQ2208_FCCM;
 195                 break;
 196         default:
 197                 return -EINVAL;
 198         }
 199
 200         shift = ffs(rdesc->suspend_mode_mask) - 1;
 201
 202         return regmap_update_bits(rdev->regmap, rdesc->suspend_config_reg,
 203                         rdesc->suspend_mode_mask, val << shift);
 204 }
 205
 206 static const struct regulator_ops rtq2208_regulator_buck_ops = {
 207         .enable = regulator_enable_regmap,
 208         .disable = regulator_disable_regmap,
 209         .is_enabled = regulator_is_enabled_regmap,
 210         .list_voltage = regulator_list_voltage_linear_range,
 211         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 212         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 213         .set_mode = rtq2208_set_mode,
 214         .get_mode = rtq2208_get_mode,
 215         .set_ramp_delay = rtq2208_set_ramp_delay,
 216         .set_active_discharge = regulator_set_active_discharge_regmap,
 217         .set_suspend_enable = rtq2208_set_suspend_enable,
 218         .set_suspend_disable = rtq2208_set_suspend_disable,
 219         .set_suspend_mode = rtq2208_set_suspend_mode,
 220 };
 221
 222 static const struct regulator_ops rtq2208_regulator_ldo_fix_ops = {
 223         .enable = regulator_enable_regmap,
 224         .disable = regulator_disable_regmap,
 225         .is_enabled = regulator_is_enabled_regmap,
 226         .set_active_discharge = regulator_set_active_discharge_regmap,
 227         .set_suspend_enable = rtq2208_set_suspend_enable,
 228         .set_suspend_disable = rtq2208_set_suspend_disable,
 229 };
 230
 231 static const struct regulator_ops rtq2208_regulator_ldo_adj_ops = {
 232         .enable = regulator_enable_regmap,
 233         .disable = regulator_disable_regmap,
 234         .is_enabled = regulator_is_enabled_regmap,
 235         .list_voltage = regulator_list_voltage_table,
 236         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 237         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 238         .set_active_discharge = regulator_set_active_discharge_regmap,
 239         .set_suspend_enable = rtq2208_set_suspend_enable,
 240         .set_suspend_disable = rtq2208_set_suspend_disable,
 241 };
 242
 243 static const unsigned int rtq2208_ldo_volt_table[] = {
 244         1800000,
 245         3300000,
 246 };
 247
 248 static struct of_regulator_match rtq2208_ldo_match[] = {
 249         {.name = "ldo2", },
 250         {.name = "ldo1", },
 251 };
 252
 253 static unsigned int rtq2208_of_map_mode(unsigned int mode)
 254 {
 255         switch (mode) {
 256         case RTQ2208_AUTO_MODE:
 257                 return REGULATOR_MODE_NORMAL;
 258         case RTQ2208_FCCM:
 259                 return REGULATOR_MODE_FAST;
 260         default:
 261                 return REGULATOR_MODE_INVALID;
 262         }
 263 }
 264
 265 static int rtq2208_init_irq_mask(struct rtq2208_rdev_map *rdev_map, unsigned int *buck_masks)
 266 {
 267         unsigned char buck_clr_masks[5] = {0x33, 0x33, 0x33, 0x33, 0x33},
 268                       sts_clr_masks[2] = {0xE7, 0xF7}, sts_masks[2] = {0xE6, 0xF6};
 269         int ret;
 270
 271         /* write clear all buck irq once */
 272         ret = regmap_bulk_write(rdev_map->regmap, RTQ2208_REG_FLT_RECORDBUCK_CB, buck_clr_masks, 5);
 273         if (ret)
 274                 return dev_err_probe(rdev_map->dev, ret, "Failed to clr buck irqs\n");
 275
 276         /* write clear general irq once */
 277         ret = regmap_bulk_write(rdev_map->regmap, RTQ2208_REG_GLOBAL_INT1, sts_clr_masks, 2);
 278         if (ret)
 279                 return dev_err_probe(rdev_map->dev, ret, "Failed to clr general irqs\n");
 280
 281         /* unmask buck ov/uv irq */
 282         ret = regmap_bulk_write(rdev_map->regmap, RTQ2208_REG_FLT_MASKBUCK_CB, buck_masks, 5);
 283         if (ret)
 284                 return dev_err_probe(rdev_map->dev, ret, "Failed to unmask buck irqs\n");
 285
 286         /* unmask needed general irq */
 287         return regmap_bulk_write(rdev_map->regmap, RTQ2208_REG_GLOBAL_INT1_MASK, sts_masks, 2);
 288 }
 289
 290 static irqreturn_t rtq2208_irq_handler(int irqno, void *devid)
 291 {
 292         unsigned char buck_flags[RTQ2208_BUCK_NUM_IRQ_REGS], sts_flags[RTQ2208_STS_NUM_IRQ_REGS];
 293         int ret = 0, i, uv_bit, ov_bit;
 294         struct rtq2208_rdev_map *rdev_map = devid;
 295         struct regulator_dev *rdev;
 296
 297         if (!rdev_map)
 298                 return IRQ_NONE;
 299
 300         /* read irq event */
 301         ret = regmap_bulk_read(rdev_map->regmap, RTQ2208_REG_FLT_RECORDBUCK_CB,
 302                                 buck_flags, ARRAY_SIZE(buck_flags));
 303         if (ret)
 304                 return IRQ_NONE;
 305
 306         ret = regmap_bulk_read(rdev_map->regmap, RTQ2208_REG_GLOBAL_INT1,
 307                                 sts_flags, ARRAY_SIZE(sts_flags));
 308         if (ret)
 309                 return IRQ_NONE;
 310
 311         /* clear irq event */
 312         ret = regmap_bulk_write(rdev_map->regmap, RTQ2208_REG_FLT_RECORDBUCK_CB,
 313                                 buck_flags, ARRAY_SIZE(buck_flags));
 314         if (ret)
 315                 return IRQ_NONE;
 316
 317         ret = regmap_bulk_write(rdev_map->regmap, RTQ2208_REG_GLOBAL_INT1,
 318                                 sts_flags, ARRAY_SIZE(sts_flags));
 319         if (ret)
 320                 return IRQ_NONE;
 321
 322         for (i = 0; i < RTQ2208_LDO_MAX; i++) {
 323                 if (!rdev_map->rdev[i])
 324                         continue;
 325
 326                 rdev = rdev_map->rdev[i];
 327                 /* uv irq */
 328                 uv_bit = (i & 1) ? 4 : 0;
 329                 if (buck_flags[i >> 1] & (1 << uv_bit))
 330                         regulator_notifier_call_chain(rdev,
 331                                         REGULATOR_EVENT_UNDER_VOLTAGE, NULL);
 332                 /* ov irq */
 333                 ov_bit = uv_bit + 1;
 334                 if (buck_flags[i >> 1] & (1 << ov_bit))
 335                         regulator_notifier_call_chain(rdev,
 336                                         REGULATOR_EVENT_REGULATION_OUT, NULL);
 337
 338                 /* hd irq */
 339                 if (sts_flags[1] & RTQ2208_HD_INT_MASK)
 340                         regulator_notifier_call_chain(rdev,
 341                                         REGULATOR_EVENT_OVER_TEMP, NULL);
 342         }
 343
 344         return IRQ_HANDLED;
 345 }
 346
 347 static int rtq2208_of_get_ldo_dvs_ability(struct device *dev)
 348 {
 349         struct device_node *np;
 350         struct of_regulator_match *match;
 351         struct regulator_desc *desc;
 352         struct regulator_init_data *init_data;
 353         u32 fixed_uV;
 354         int ret, i;
 355
 356         if (!dev->of_node)
 357                 return -ENODEV;
 358
 359         np = of_get_child_by_name(dev->of_node, "regulators");
 360         if (!np)
 361                 np = dev->of_node;
 362
 363         ret = of_regulator_match(dev, np, rtq2208_ldo_match, ARRAY_SIZE(rtq2208_ldo_match));
 364
 365         of_node_put(np);
 366
 367         if (ret < 0)
 368                 return ret;
 369
 370         for (i = 0; i < ARRAY_SIZE(rtq2208_ldo_match); i++) {
 371                 match = rtq2208_ldo_match + i;
 372                 init_data = match->init_data;
 373                 desc = (struct regulator_desc *)match->desc;
 374
 375                 if (!init_data || !desc)
 376                         continue;
 377
 378                 /* specify working fixed voltage if the propery exists */
 379                 ret = of_property_read_u32(match->of_node, "richtek,fixed-microvolt", &fixed_uV);
 380
 381                 if (!ret) {
 382                         if (fixed_uV != init_data->constraints.min_uV ||
 383                                 fixed_uV != init_data->constraints.max_uV)
 384                                 return -EINVAL;
 385                         desc->n_voltages = 1;
 386                         desc->fixed_uV = fixed_uV;
 387                         desc->fixed_uV = init_data->constraints.min_uV;
 388                         desc->ops = &rtq2208_regulator_ldo_fix_ops;
 389                 } else {
 390                         desc->n_voltages = ARRAY_SIZE(rtq2208_ldo_volt_table);
 391                         desc->volt_table = rtq2208_ldo_volt_table;
 392                         desc->ops = &rtq2208_regulator_ldo_adj_ops;
 393                 }
 394         }
 395
 396         return 0;
 397 }
 398
 399
 400 #define BUCK_INFO(_name, _id)                                           \
 401 {                                                                       \
 402         .name = _name,                                                  \
 403         .base = RTQ2208_REG_BUCK_##_id##_CFG0,                          \
 404         .enable_reg = BUCK_RG_SHIFT(RTQ2208_REG_BUCK_##_id##_CFG0, 2),  \
 405         .dis_reg = RTQ2208_REG_BUCK_##_id##_CFG0,                       \
 406 }
 407
 408 #define LDO_INFO(_name, _id)                                            \
 409 {                                                                       \
 410         .name = _name,                                                  \
 411         .base = RTQ2208_REG_LDO##_id##_CFG,                             \
 412         .enable_reg = RTQ2208_REG_LDO##_id##_CFG,                       \
 413         .dis_mask = RTQ2208_LDO##_id##_DISCHG_EN_MASK,                  \
 414         .dis_on = RTQ2208_LDO##_id##_DISCHG_EN_MASK,                    \
 415         .vsel_mask = RTQ2208_LDO##_id##_VOSEL_SD_MASK,                  \
 416 }
 417
 418 #define BUCK_RG_SHIFT(_base, _shift)    (_base + _shift)
 419 #define VSEL_SHIFT(_sel)        (_sel ? 3 : 1)
 420 #define MTP_SEL_MASK(_sel)      RTQ2208_BUCK_EN_NR_MTP_SEL##_sel##_MASK
 421
 422 static const struct linear_range rtq2208_vout_range[] = {
 423         REGULATOR_LINEAR_RANGE(400000, 0, 180, 5000),
 424         REGULATOR_LINEAR_RANGE(1310000, 181, 255, 10000),
 425 };
 426
 427 static void rtq2208_init_regulator_desc(struct rtq2208_regulator_desc *rdesc, int mtp_sel, int idx)
 428 {
 429         struct regulator_desc *desc;
 430         static const struct {
 431                 char *name;
 432                 int base;
 433                 int enable_reg;
 434                 int dis_reg;
 435                 int dis_mask;
 436                 int dis_on;
 437                 int vsel_mask;
 438         } regulator_info[] = {
 439                 BUCK_INFO("buck-b", B),
 440                 BUCK_INFO("buck-c", C),
 441                 BUCK_INFO("buck-d", D),
 442                 BUCK_INFO("buck-a", A),
 443                 BUCK_INFO("buck-f", F),
 444                 BUCK_INFO("buck-g", G),
 445                 BUCK_INFO("buck-h", H),
 446                 BUCK_INFO("buck-e", E),
 447                 LDO_INFO("ldo2", 2),
 448                 LDO_INFO("ldo1", 1),
 449         }, *curr_info;
 450
 451         curr_info = regulator_info + idx;
 452         desc = &rdesc->desc;
 453         desc->name = curr_info->name;
 454         desc->of_match = of_match_ptr(curr_info->name);
 455         desc->regulators_node = of_match_ptr("regulators");
 456         desc->id = idx;
 457         desc->owner = THIS_MODULE;
 458         desc->type = REGULATOR_VOLTAGE;
 459         desc->enable_mask = mtp_sel ? MTP_SEL_MASK(1) : MTP_SEL_MASK(0);
 460         desc->enable_reg = curr_info->enable_reg;
 461         desc->active_discharge_off = 0;
 462
 463         rdesc->mode_mask = RTQ2208_BUCK_NRMODE_MASK;
 464
 465         if (idx >= RTQ2208_BUCK_B && idx <= RTQ2208_BUCK_E) {
 466                 /* init buck desc */
 467                 desc->ops = &rtq2208_regulator_buck_ops;
 468                 desc->vsel_reg = curr_info->base + VSEL_SHIFT(mtp_sel);
 469                 desc->vsel_mask = RTQ2208_BUCK_NR_MTP_SEL_MASK;
 470                 desc->n_voltages = RTQ2208_VOUT_MAXNUM;
 471                 desc->linear_ranges = rtq2208_vout_range;
 472                 desc->n_linear_ranges = ARRAY_SIZE(rtq2208_vout_range);
 473                 desc->ramp_reg = BUCK_RG_SHIFT(curr_info->base, 5);
 474                 desc->of_map_mode = rtq2208_of_map_mode;
 475                 desc->active_discharge_reg = curr_info->dis_reg;
 476                 desc->active_discharge_on = RTQ2208_EN_DIS_MASK;
 477                 desc->active_discharge_mask = RTQ2208_EN_DIS_MASK;
 478
 479                 rdesc->mode_reg = BUCK_RG_SHIFT(curr_info->base, 2);
 480                 rdesc->suspend_config_reg = BUCK_RG_SHIFT(curr_info->base, 4);
 481                 rdesc->suspend_enable_mask = RTQ2208_BUCK_EN_STR_MASK;
 482                 rdesc->suspend_mode_mask = RTQ2208_BUCK_STRMODE_MASK;
 483         } else {
 484                 /* init ldo desc */
 485                 desc->active_discharge_reg = RTQ2208_REG_LDO_DVS_CTRL;
 486                 desc->active_discharge_on = curr_info->dis_on;
 487                 desc->active_discharge_mask = curr_info->dis_mask;
 488                 desc->vsel_reg = RTQ2208_REG_LDO_DVS_CTRL;
 489                 desc->vsel_mask = curr_info->vsel_mask;
 490
 491                 rdesc->suspend_config_reg = curr_info->base;
 492                 rdesc->suspend_enable_mask = RTQ2208_LDO_EN_STR_MASK;
 493         }
 494 }
 495
 496 static int rtq2208_parse_regulator_dt_data(int n_regulator, const unsigned int *regulator_idx_table,
 497                 struct rtq2208_regulator_desc *rdesc[RTQ2208_LDO_MAX], struct device *dev)
 498 {
 499         int mtp_sel, i, idx, ret;
 500
 501         /* get mtp_sel0 or mtp_sel1 */
 502         mtp_sel = device_property_read_bool(dev, "richtek,mtp-sel-high");
 503
 504         for (i = 0; i < n_regulator; i++) {
 505                 idx = regulator_idx_table[i];
 506
 507                 rdesc[i] = devm_kcalloc(dev, 1, sizeof(*rdesc[0]), GFP_KERNEL);
 508                 if (!rdesc[i])
 509                         return -ENOMEM;
 510
 511                 rtq2208_init_regulator_desc(rdesc[i], mtp_sel, idx);
 512
 513                 /* init ldo dvs ability */
 514                 if (idx >= RTQ2208_LDO2)
 515                         rtq2208_ldo_match[idx - RTQ2208_LDO2].desc = &rdesc[i]->desc;
 516         }
 517
 518         /* init ldo fixed_uV */
 519         ret = rtq2208_of_get_ldo_dvs_ability(dev);
 520         if (ret)
 521                 return dev_err_probe(dev, ret, "Failed to get ldo fixed_uV\n");
 522
 523         return 0;
 524
 525 }
 526
 527 /** different slave address corresponds different used bucks
 528  * slave address 0x10: BUCK[BCA FGE]
 529  * slave address 0x20: BUCK[BC FGHE]
 530  * slave address 0x40: BUCK[C G]
 531  */
 532 static int rtq2208_regulator_check(int slave_addr, int *num,
 533                                 int *regulator_idx_table, unsigned int *buck_masks)
 534 {
 535         static bool rtq2208_used_table[3][RTQ2208_LDO_MAX] = {
 536                 /* BUCK[BCA FGE], LDO[12] */
 537                 {1, 1, 0, 1, 1, 1, 0, 1, 1, 1},
 538                 /* BUCK[BC FGHE], LDO[12]*/
 539                 {1, 1, 0, 0, 1, 1, 1, 1, 1, 1},
 540                 /* BUCK[C G], LDO[12] */
 541                 {0, 1, 0, 0, 0, 1, 0, 0, 1, 1},
 542         };
 543         int i, idx = ffs(slave_addr >> 4) - 1;
 544         u8 mask;
 545
 546         for (i = 0; i < RTQ2208_LDO_MAX; i++) {
 547                 if (!rtq2208_used_table[idx][i])
 548                         continue;
 549
 550                 regulator_idx_table[(*num)++] = i;
 551
 552                 mask = RTQ2208_BUCK_MASK(4 * i, 4 * i + 1);
 553                 buck_masks[i >> 1] &= ~mask;
 554         }
 555
 556         return 0;
 557 }
 558
 559 static const struct regmap_config rtq2208_regmap_config = {
 560         .reg_bits = 8,
 561         .val_bits = 8,
 562         .max_register = 0xEF,
 563 };
 564
 565 static int rtq2208_probe(struct i2c_client *i2c)
 566 {
 567         struct device *dev = &i2c->dev;
 568         struct regmap *regmap;
 569         struct rtq2208_regulator_desc *rdesc[RTQ2208_LDO_MAX];
 570         struct regulator_dev *rdev;
 571         struct regulator_config cfg = {};
 572         struct rtq2208_rdev_map *rdev_map;
 573         int i, ret = 0, idx, n_regulator = 0;
 574         unsigned int regulator_idx_table[RTQ2208_LDO_MAX],
 575                      buck_masks[RTQ2208_BUCK_NUM_IRQ_REGS] = {0x33, 0x33, 0x33, 0x33, 0x33};
 576
 577         rdev_map = devm_kzalloc(dev, sizeof(struct rtq2208_rdev_map), GFP_KERNEL);
 578         if (!rdev_map)
 579                 return -ENOMEM;
 580
 581         regmap = devm_regmap_init_i2c(i2c, &rtq2208_regmap_config);
 582         if (IS_ERR(regmap))
 583                 return dev_err_probe(dev, PTR_ERR(regmap), "Failed to allocate regmap\n");
 584
 585         /* get needed regulator */
 586         ret = rtq2208_regulator_check(i2c->addr, &n_regulator, regulator_idx_table, buck_masks);
 587         if (ret)
 588                 return dev_err_probe(dev, ret, "Failed to check used regulators\n");
 589
 590         rdev_map->regmap = regmap;
 591         rdev_map->dev = dev;
 592
 593         cfg.dev = dev;
 594
 595         /* init regulator desc */
 596         ret = rtq2208_parse_regulator_dt_data(n_regulator, regulator_idx_table, rdesc, dev);
 597         if (ret)
 598                 return ret;
 599
 600         for (i = 0; i < n_regulator; i++) {
 601                 idx = regulator_idx_table[i];
 602
 603                 /* register regulator */
 604                 rdev = devm_regulator_register(dev, &rdesc[i]->desc, &cfg);
 605                 if (IS_ERR(rdev))
 606                         return PTR_ERR(rdev);
 607
 608                 rdev_map->rdev[idx] = rdev;
 609         }
 610
 611         /* init interrupt mask */
 612         ret = rtq2208_init_irq_mask(rdev_map, buck_masks);
 613         if (ret)
 614                 return ret;
 615
 616         /* register interrupt */
 617         return devm_request_threaded_irq(dev, i2c->irq, NULL, rtq2208_irq_handler,
 618                                         IRQF_ONESHOT, dev_name(dev), rdev_map);
 619 }
 620
 621 static const struct of_device_id rtq2208_device_tables[] = {
 622         { .compatible = "richtek,rtq2208" },
 623         {}
 624 };
 625 MODULE_DEVICE_TABLE(of, rtq2208_device_tables);
 626
 627 static struct i2c_driver rtq2208_driver = {
 628         .driver = {
 629                 .name = "rtq2208",
 630                 .of_match_table = rtq2208_device_tables,
 631         },
 632         .probe = rtq2208_probe,
 633 };
 634 module_i2c_driver(rtq2208_driver);
 635
 636 MODULE_AUTHOR("Alina Yu <[email protected]>");
 637 MODULE_DESCRIPTION("Richtek RTQ2208 Regulator Driver");
 638 MODULE_LICENSE("GPL");