1 /* 2 * Regulator driver for Rockchip RK808/RK818 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 * Copyright (C) 2016 PHYTEC Messtechnik GmbH 10 * 11 * Author: Wadim Egorov <w.egorov@phytec.de> 12 * 13 * This program is free software; you can redistribute it and/or modify it 14 * under the terms and conditions of the GNU General Public License, 15 * version 2, as published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope it will be useful, but WITHOUT 18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 20 * more details. 21 */ 22 23 #include <linux/delay.h> 24 #include <linux/gpio.h> 25 #include <linux/i2c.h> 26 #include <linux/module.h> 27 #include <linux/of_device.h> 28 #include <linux/of_gpio.h> 29 #include <linux/mfd/rk808.h> 30 #include <linux/regulator/driver.h> 31 #include <linux/regulator/of_regulator.h> 32 #include <linux/gpio/consumer.h> 33 34 /* Field Definitions */ 35 #define RK808_BUCK_VSEL_MASK 0x3f 36 #define RK808_BUCK4_VSEL_MASK 0xf 37 #define RK808_LDO_VSEL_MASK 0x1f 38 39 #define RK818_BUCK_VSEL_MASK 0x3f 40 #define RK818_BUCK4_VSEL_MASK 0x1f 41 #define RK818_LDO_VSEL_MASK 0x1f 42 #define RK818_LDO3_ON_VSEL_MASK 0xf 43 #define RK818_BOOST_ON_VSEL_MASK 0xe0 44 45 /* Ramp rate definitions for buck1 / buck2 only */ 46 #define RK808_RAMP_RATE_OFFSET 3 47 #define RK808_RAMP_RATE_MASK (3 << RK808_RAMP_RATE_OFFSET) 48 #define RK808_RAMP_RATE_2MV_PER_US (0 << RK808_RAMP_RATE_OFFSET) 49 #define RK808_RAMP_RATE_4MV_PER_US (1 << RK808_RAMP_RATE_OFFSET) 50 #define RK808_RAMP_RATE_6MV_PER_US (2 << RK808_RAMP_RATE_OFFSET) 51 #define RK808_RAMP_RATE_10MV_PER_US (3 << RK808_RAMP_RATE_OFFSET) 52 53 #define RK808_DVS2_POL BIT(2) 54 #define RK808_DVS1_POL BIT(1) 55 56 /* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */ 57 #define RK808_SLP_REG_OFFSET 1 58 59 /* Offset from XXX_ON_VSEL to XXX_DVS_VSEL */ 60 #define RK808_DVS_REG_OFFSET 2 61 62 /* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */ 63 #define RK808_SLP_SET_OFF_REG_OFFSET 2 64 65 /* max steps for increase voltage of Buck1/2, equal 100mv*/ 66 #define MAX_STEPS_ONE_TIME 8 67 68 #define RK805_DESC(_id, _match, _supply, _min, _max, _step, _vreg, \ 69 _vmask, _ereg, _emask, _etime) \ 70 [_id] = { \ 71 .name = (_match), \ 72 .supply_name = (_supply), \ 73 .of_match = of_match_ptr(_match), \ 74 .regulators_node = of_match_ptr("regulators"), \ 75 .type = REGULATOR_VOLTAGE, \ 76 .id = (_id), \ 77 .n_voltages = (((_max) - (_min)) / (_step) + 1), \ 78 .owner = THIS_MODULE, \ 79 .min_uV = (_min) * 1000, \ 80 .uV_step = (_step) * 1000, \ 81 .vsel_reg = (_vreg), \ 82 .vsel_mask = (_vmask), \ 83 .enable_reg = (_ereg), \ 84 .enable_mask = (_emask), \ 85 .enable_time = (_etime), \ 86 .ops = &rk805_reg_ops, \ 87 } 88 89 #define RK8XX_DESC(_id, _match, _supply, _min, _max, _step, _vreg, \ 90 _vmask, _ereg, _emask, _etime) \ 91 [_id] = { \ 92 .name = (_match), \ 93 .supply_name = (_supply), \ 94 .of_match = of_match_ptr(_match), \ 95 .regulators_node = of_match_ptr("regulators"), \ 96 .type = REGULATOR_VOLTAGE, \ 97 .id = (_id), \ 98 .n_voltages = (((_max) - (_min)) / (_step) + 1), \ 99 .owner = THIS_MODULE, \ 100 .min_uV = (_min) * 1000, \ 101 .uV_step = (_step) * 1000, \ 102 .vsel_reg = (_vreg), \ 103 .vsel_mask = (_vmask), \ 104 .enable_reg = (_ereg), \ 105 .enable_mask = (_emask), \ 106 .enable_time = (_etime), \ 107 .ops = &rk808_reg_ops, \ 108 } 109 110 #define RK8XX_DESC_SWITCH(_id, _match, _supply, _ereg, _emask) \ 111 [_id] = { \ 112 .name = (_match), \ 113 .supply_name = (_supply), \ 114 .of_match = of_match_ptr(_match), \ 115 .regulators_node = of_match_ptr("regulators"), \ 116 .type = REGULATOR_VOLTAGE, \ 117 .id = (_id), \ 118 .enable_reg = (_ereg), \ 119 .enable_mask = (_emask), \ 120 .owner = THIS_MODULE, \ 121 .ops = &rk808_switch_ops \ 122 } 123 124 125 struct rk808_regulator_data { 126 struct gpio_desc *dvs_gpio[2]; 127 }; 128 129 static const int rk808_buck_config_regs[] = { 130 RK808_BUCK1_CONFIG_REG, 131 RK808_BUCK2_CONFIG_REG, 132 RK808_BUCK3_CONFIG_REG, 133 RK808_BUCK4_CONFIG_REG, 134 }; 135 136 static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = { 137 REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000), 138 REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0), 139 }; 140 141 static int rk808_buck1_2_get_voltage_sel_regmap(struct regulator_dev *rdev) 142 { 143 struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev); 144 int id = rdev_get_id(rdev); 145 struct gpio_desc *gpio = pdata->dvs_gpio[id]; 146 unsigned int val; 147 int ret; 148 149 if (!gpio || gpiod_get_value(gpio) == 0) 150 return regulator_get_voltage_sel_regmap(rdev); 151 152 ret = regmap_read(rdev->regmap, 153 rdev->desc->vsel_reg + RK808_DVS_REG_OFFSET, 154 &val); 155 if (ret != 0) 156 return ret; 157 158 val &= rdev->desc->vsel_mask; 159 val >>= ffs(rdev->desc->vsel_mask) - 1; 160 161 return val; 162 } 163 164 static int rk808_buck1_2_i2c_set_voltage_sel(struct regulator_dev *rdev, 165 unsigned sel) 166 { 167 int ret, delta_sel; 168 unsigned int old_sel, tmp, val, mask = rdev->desc->vsel_mask; 169 170 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val); 171 if (ret != 0) 172 return ret; 173 174 tmp = val & ~mask; 175 old_sel = val & mask; 176 old_sel >>= ffs(mask) - 1; 177 delta_sel = sel - old_sel; 178 179 /* 180 * If directly modify the register to change the voltage, we will face 181 * the risk of overshoot. Put it into a multi-step, can effectively 182 * avoid this problem, a step is 100mv here. 183 */ 184 while (delta_sel > MAX_STEPS_ONE_TIME) { 185 old_sel += MAX_STEPS_ONE_TIME; 186 val = old_sel << (ffs(mask) - 1); 187 val |= tmp; 188 189 /* 190 * i2c is 400kHz (2.5us per bit) and we must transmit _at least_ 191 * 3 bytes (24 bits) plus start and stop so 26 bits. So we've 192 * got more than 65 us between each voltage change and thus 193 * won't ramp faster than ~1500 uV / us. 194 */ 195 ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val); 196 delta_sel = sel - old_sel; 197 } 198 199 sel <<= ffs(mask) - 1; 200 val = tmp | sel; 201 ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val); 202 203 /* 204 * When we change the voltage register directly, the ramp rate is about 205 * 100000uv/us, wait 1us to make sure the target voltage to be stable, 206 * so we needn't wait extra time after that. 207 */ 208 udelay(1); 209 210 return ret; 211 } 212 213 static int rk808_buck1_2_set_voltage_sel(struct regulator_dev *rdev, 214 unsigned sel) 215 { 216 struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev); 217 int id = rdev_get_id(rdev); 218 struct gpio_desc *gpio = pdata->dvs_gpio[id]; 219 unsigned int reg = rdev->desc->vsel_reg; 220 unsigned old_sel; 221 int ret, gpio_level; 222 223 if (!gpio) 224 return rk808_buck1_2_i2c_set_voltage_sel(rdev, sel); 225 226 gpio_level = gpiod_get_value(gpio); 227 if (gpio_level == 0) { 228 reg += RK808_DVS_REG_OFFSET; 229 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &old_sel); 230 } else { 231 ret = regmap_read(rdev->regmap, 232 reg + RK808_DVS_REG_OFFSET, 233 &old_sel); 234 } 235 236 if (ret != 0) 237 return ret; 238 239 sel <<= ffs(rdev->desc->vsel_mask) - 1; 240 sel |= old_sel & ~rdev->desc->vsel_mask; 241 242 ret = regmap_write(rdev->regmap, reg, sel); 243 if (ret) 244 return ret; 245 246 gpiod_set_value(gpio, !gpio_level); 247 248 return ret; 249 } 250 251 static int rk808_buck1_2_set_voltage_time_sel(struct regulator_dev *rdev, 252 unsigned int old_selector, 253 unsigned int new_selector) 254 { 255 struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev); 256 int id = rdev_get_id(rdev); 257 struct gpio_desc *gpio = pdata->dvs_gpio[id]; 258 259 /* if there is no dvs1/2 pin, we don't need wait extra time here. */ 260 if (!gpio) 261 return 0; 262 263 return regulator_set_voltage_time_sel(rdev, old_selector, new_selector); 264 } 265 266 static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) 267 { 268 unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US; 269 unsigned int reg = rk808_buck_config_regs[rdev_get_id(rdev)]; 270 271 switch (ramp_delay) { 272 case 1 ... 2000: 273 ramp_value = RK808_RAMP_RATE_2MV_PER_US; 274 break; 275 case 2001 ... 4000: 276 ramp_value = RK808_RAMP_RATE_4MV_PER_US; 277 break; 278 case 4001 ... 6000: 279 ramp_value = RK808_RAMP_RATE_6MV_PER_US; 280 break; 281 case 6001 ... 10000: 282 break; 283 default: 284 pr_warn("%s ramp_delay: %d not supported, setting 10000\n", 285 rdev->desc->name, ramp_delay); 286 } 287 288 return regmap_update_bits(rdev->regmap, reg, 289 RK808_RAMP_RATE_MASK, ramp_value); 290 } 291 292 static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv) 293 { 294 unsigned int reg; 295 int sel = regulator_map_voltage_linear(rdev, uv, uv); 296 297 if (sel < 0) 298 return -EINVAL; 299 300 reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET; 301 302 return regmap_update_bits(rdev->regmap, reg, 303 rdev->desc->vsel_mask, 304 sel); 305 } 306 307 static int rk808_set_suspend_voltage_range(struct regulator_dev *rdev, int uv) 308 { 309 unsigned int reg; 310 int sel = regulator_map_voltage_linear_range(rdev, uv, uv); 311 312 if (sel < 0) 313 return -EINVAL; 314 315 reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET; 316 317 return regmap_update_bits(rdev->regmap, reg, 318 rdev->desc->vsel_mask, 319 sel); 320 } 321 322 static int rk805_set_suspend_enable(struct regulator_dev *rdev) 323 { 324 unsigned int reg; 325 326 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET; 327 328 return regmap_update_bits(rdev->regmap, reg, 329 rdev->desc->enable_mask, 330 rdev->desc->enable_mask); 331 } 332 333 static int rk805_set_suspend_disable(struct regulator_dev *rdev) 334 { 335 unsigned int reg; 336 337 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET; 338 339 return regmap_update_bits(rdev->regmap, reg, 340 rdev->desc->enable_mask, 341 0); 342 } 343 344 static int rk808_set_suspend_enable(struct regulator_dev *rdev) 345 { 346 unsigned int reg; 347 348 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET; 349 350 return regmap_update_bits(rdev->regmap, reg, 351 rdev->desc->enable_mask, 352 0); 353 } 354 355 static int rk808_set_suspend_disable(struct regulator_dev *rdev) 356 { 357 unsigned int reg; 358 359 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET; 360 361 return regmap_update_bits(rdev->regmap, reg, 362 rdev->desc->enable_mask, 363 rdev->desc->enable_mask); 364 } 365 366 static struct regulator_ops rk805_reg_ops = { 367 .list_voltage = regulator_list_voltage_linear, 368 .map_voltage = regulator_map_voltage_linear, 369 .get_voltage_sel = regulator_get_voltage_sel_regmap, 370 .set_voltage_sel = regulator_set_voltage_sel_regmap, 371 .enable = regulator_enable_regmap, 372 .disable = regulator_disable_regmap, 373 .is_enabled = regulator_is_enabled_regmap, 374 .set_suspend_voltage = rk808_set_suspend_voltage, 375 .set_suspend_enable = rk805_set_suspend_enable, 376 .set_suspend_disable = rk805_set_suspend_disable, 377 }; 378 379 static struct regulator_ops rk805_switch_ops = { 380 .enable = regulator_enable_regmap, 381 .disable = regulator_disable_regmap, 382 .is_enabled = regulator_is_enabled_regmap, 383 .set_suspend_enable = rk805_set_suspend_enable, 384 .set_suspend_disable = rk805_set_suspend_disable, 385 }; 386 387 static struct regulator_ops rk808_buck1_2_ops = { 388 .list_voltage = regulator_list_voltage_linear, 389 .map_voltage = regulator_map_voltage_linear, 390 .get_voltage_sel = rk808_buck1_2_get_voltage_sel_regmap, 391 .set_voltage_sel = rk808_buck1_2_set_voltage_sel, 392 .set_voltage_time_sel = rk808_buck1_2_set_voltage_time_sel, 393 .enable = regulator_enable_regmap, 394 .disable = regulator_disable_regmap, 395 .is_enabled = regulator_is_enabled_regmap, 396 .set_ramp_delay = rk808_set_ramp_delay, 397 .set_suspend_voltage = rk808_set_suspend_voltage, 398 .set_suspend_enable = rk808_set_suspend_enable, 399 .set_suspend_disable = rk808_set_suspend_disable, 400 }; 401 402 static struct regulator_ops rk808_reg_ops = { 403 .list_voltage = regulator_list_voltage_linear, 404 .map_voltage = regulator_map_voltage_linear, 405 .get_voltage_sel = regulator_get_voltage_sel_regmap, 406 .set_voltage_sel = regulator_set_voltage_sel_regmap, 407 .enable = regulator_enable_regmap, 408 .disable = regulator_disable_regmap, 409 .is_enabled = regulator_is_enabled_regmap, 410 .set_suspend_voltage = rk808_set_suspend_voltage, 411 .set_suspend_enable = rk808_set_suspend_enable, 412 .set_suspend_disable = rk808_set_suspend_disable, 413 }; 414 415 static struct regulator_ops rk808_reg_ops_ranges = { 416 .list_voltage = regulator_list_voltage_linear_range, 417 .map_voltage = regulator_map_voltage_linear_range, 418 .get_voltage_sel = regulator_get_voltage_sel_regmap, 419 .set_voltage_sel = regulator_set_voltage_sel_regmap, 420 .enable = regulator_enable_regmap, 421 .disable = regulator_disable_regmap, 422 .is_enabled = regulator_is_enabled_regmap, 423 .set_suspend_voltage = rk808_set_suspend_voltage_range, 424 .set_suspend_enable = rk808_set_suspend_enable, 425 .set_suspend_disable = rk808_set_suspend_disable, 426 }; 427 428 static struct regulator_ops rk808_switch_ops = { 429 .enable = regulator_enable_regmap, 430 .disable = regulator_disable_regmap, 431 .is_enabled = regulator_is_enabled_regmap, 432 .set_suspend_enable = rk808_set_suspend_enable, 433 .set_suspend_disable = rk808_set_suspend_disable, 434 }; 435 436 static const struct regulator_desc rk805_reg[] = { 437 { 438 .name = "DCDC_REG1", 439 .supply_name = "vcc1", 440 .of_match = of_match_ptr("DCDC_REG1"), 441 .regulators_node = of_match_ptr("regulators"), 442 .id = RK805_ID_DCDC1, 443 .ops = &rk805_reg_ops, 444 .type = REGULATOR_VOLTAGE, 445 .min_uV = 712500, 446 .uV_step = 12500, 447 .n_voltages = 64, 448 .vsel_reg = RK805_BUCK1_ON_VSEL_REG, 449 .vsel_mask = RK818_BUCK_VSEL_MASK, 450 .enable_reg = RK805_DCDC_EN_REG, 451 .enable_mask = BIT(0), 452 .owner = THIS_MODULE, 453 }, { 454 .name = "DCDC_REG2", 455 .supply_name = "vcc2", 456 .of_match = of_match_ptr("DCDC_REG2"), 457 .regulators_node = of_match_ptr("regulators"), 458 .id = RK805_ID_DCDC2, 459 .ops = &rk805_reg_ops, 460 .type = REGULATOR_VOLTAGE, 461 .min_uV = 712500, 462 .uV_step = 12500, 463 .n_voltages = 64, 464 .vsel_reg = RK805_BUCK2_ON_VSEL_REG, 465 .vsel_mask = RK818_BUCK_VSEL_MASK, 466 .enable_reg = RK805_DCDC_EN_REG, 467 .enable_mask = BIT(1), 468 .owner = THIS_MODULE, 469 }, { 470 .name = "DCDC_REG3", 471 .supply_name = "vcc3", 472 .of_match = of_match_ptr("DCDC_REG3"), 473 .regulators_node = of_match_ptr("regulators"), 474 .id = RK805_ID_DCDC3, 475 .ops = &rk805_switch_ops, 476 .type = REGULATOR_VOLTAGE, 477 .n_voltages = 1, 478 .enable_reg = RK805_DCDC_EN_REG, 479 .enable_mask = BIT(2), 480 .owner = THIS_MODULE, 481 }, 482 483 RK805_DESC(RK805_ID_DCDC4, "DCDC_REG4", "vcc4", 800, 3400, 100, 484 RK805_BUCK4_ON_VSEL_REG, RK818_BUCK4_VSEL_MASK, 485 RK805_DCDC_EN_REG, BIT(3), 0), 486 487 RK805_DESC(RK805_ID_LDO1, "LDO_REG1", "vcc5", 800, 3400, 100, 488 RK805_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK805_LDO_EN_REG, 489 BIT(0), 400), 490 RK805_DESC(RK805_ID_LDO2, "LDO_REG2", "vcc5", 800, 3400, 100, 491 RK805_LDO2_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK805_LDO_EN_REG, 492 BIT(1), 400), 493 RK805_DESC(RK805_ID_LDO3, "LDO_REG3", "vcc6", 800, 3400, 100, 494 RK805_LDO3_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK805_LDO_EN_REG, 495 BIT(2), 400), 496 }; 497 498 static const struct regulator_desc rk808_reg[] = { 499 { 500 .name = "DCDC_REG1", 501 .supply_name = "vcc1", 502 .of_match = of_match_ptr("DCDC_REG1"), 503 .regulators_node = of_match_ptr("regulators"), 504 .id = RK808_ID_DCDC1, 505 .ops = &rk808_buck1_2_ops, 506 .type = REGULATOR_VOLTAGE, 507 .min_uV = 712500, 508 .uV_step = 12500, 509 .n_voltages = 64, 510 .vsel_reg = RK808_BUCK1_ON_VSEL_REG, 511 .vsel_mask = RK808_BUCK_VSEL_MASK, 512 .enable_reg = RK808_DCDC_EN_REG, 513 .enable_mask = BIT(0), 514 .owner = THIS_MODULE, 515 }, { 516 .name = "DCDC_REG2", 517 .supply_name = "vcc2", 518 .of_match = of_match_ptr("DCDC_REG2"), 519 .regulators_node = of_match_ptr("regulators"), 520 .id = RK808_ID_DCDC2, 521 .ops = &rk808_buck1_2_ops, 522 .type = REGULATOR_VOLTAGE, 523 .min_uV = 712500, 524 .uV_step = 12500, 525 .n_voltages = 64, 526 .vsel_reg = RK808_BUCK2_ON_VSEL_REG, 527 .vsel_mask = RK808_BUCK_VSEL_MASK, 528 .enable_reg = RK808_DCDC_EN_REG, 529 .enable_mask = BIT(1), 530 .owner = THIS_MODULE, 531 }, { 532 .name = "DCDC_REG3", 533 .supply_name = "vcc3", 534 .of_match = of_match_ptr("DCDC_REG3"), 535 .regulators_node = of_match_ptr("regulators"), 536 .id = RK808_ID_DCDC3, 537 .ops = &rk808_switch_ops, 538 .type = REGULATOR_VOLTAGE, 539 .n_voltages = 1, 540 .enable_reg = RK808_DCDC_EN_REG, 541 .enable_mask = BIT(2), 542 .owner = THIS_MODULE, 543 }, 544 RK8XX_DESC(RK808_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3300, 100, 545 RK808_BUCK4_ON_VSEL_REG, RK808_BUCK4_VSEL_MASK, 546 RK808_DCDC_EN_REG, BIT(3), 0), 547 RK8XX_DESC(RK808_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100, 548 RK808_LDO1_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 549 BIT(0), 400), 550 RK8XX_DESC(RK808_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100, 551 RK808_LDO2_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 552 BIT(1), 400), 553 { 554 .name = "LDO_REG3", 555 .supply_name = "vcc7", 556 .of_match = of_match_ptr("LDO_REG3"), 557 .regulators_node = of_match_ptr("regulators"), 558 .id = RK808_ID_LDO3, 559 .ops = &rk808_reg_ops_ranges, 560 .type = REGULATOR_VOLTAGE, 561 .n_voltages = 16, 562 .linear_ranges = rk808_ldo3_voltage_ranges, 563 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges), 564 .vsel_reg = RK808_LDO3_ON_VSEL_REG, 565 .vsel_mask = RK808_BUCK4_VSEL_MASK, 566 .enable_reg = RK808_LDO_EN_REG, 567 .enable_mask = BIT(2), 568 .enable_time = 400, 569 .owner = THIS_MODULE, 570 }, 571 RK8XX_DESC(RK808_ID_LDO4, "LDO_REG4", "vcc9", 1800, 3400, 100, 572 RK808_LDO4_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 573 BIT(3), 400), 574 RK8XX_DESC(RK808_ID_LDO5, "LDO_REG5", "vcc9", 1800, 3400, 100, 575 RK808_LDO5_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 576 BIT(4), 400), 577 RK8XX_DESC(RK808_ID_LDO6, "LDO_REG6", "vcc10", 800, 2500, 100, 578 RK808_LDO6_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 579 BIT(5), 400), 580 RK8XX_DESC(RK808_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100, 581 RK808_LDO7_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 582 BIT(6), 400), 583 RK8XX_DESC(RK808_ID_LDO8, "LDO_REG8", "vcc11", 1800, 3400, 100, 584 RK808_LDO8_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 585 BIT(7), 400), 586 RK8XX_DESC_SWITCH(RK808_ID_SWITCH1, "SWITCH_REG1", "vcc8", 587 RK808_DCDC_EN_REG, BIT(5)), 588 RK8XX_DESC_SWITCH(RK808_ID_SWITCH2, "SWITCH_REG2", "vcc12", 589 RK808_DCDC_EN_REG, BIT(6)), 590 }; 591 592 static const struct regulator_desc rk818_reg[] = { 593 { 594 .name = "DCDC_REG1", 595 .supply_name = "vcc1", 596 .of_match = of_match_ptr("DCDC_REG1"), 597 .regulators_node = of_match_ptr("regulators"), 598 .id = RK818_ID_DCDC1, 599 .ops = &rk808_reg_ops, 600 .type = REGULATOR_VOLTAGE, 601 .min_uV = 712500, 602 .uV_step = 12500, 603 .n_voltages = 64, 604 .vsel_reg = RK818_BUCK1_ON_VSEL_REG, 605 .vsel_mask = RK818_BUCK_VSEL_MASK, 606 .enable_reg = RK818_DCDC_EN_REG, 607 .enable_mask = BIT(0), 608 .owner = THIS_MODULE, 609 }, { 610 .name = "DCDC_REG2", 611 .supply_name = "vcc2", 612 .of_match = of_match_ptr("DCDC_REG2"), 613 .regulators_node = of_match_ptr("regulators"), 614 .id = RK818_ID_DCDC2, 615 .ops = &rk808_reg_ops, 616 .type = REGULATOR_VOLTAGE, 617 .min_uV = 712500, 618 .uV_step = 12500, 619 .n_voltages = 64, 620 .vsel_reg = RK818_BUCK2_ON_VSEL_REG, 621 .vsel_mask = RK818_BUCK_VSEL_MASK, 622 .enable_reg = RK818_DCDC_EN_REG, 623 .enable_mask = BIT(1), 624 .owner = THIS_MODULE, 625 }, { 626 .name = "DCDC_REG3", 627 .supply_name = "vcc3", 628 .of_match = of_match_ptr("DCDC_REG3"), 629 .regulators_node = of_match_ptr("regulators"), 630 .id = RK818_ID_DCDC3, 631 .ops = &rk808_switch_ops, 632 .type = REGULATOR_VOLTAGE, 633 .n_voltages = 1, 634 .enable_reg = RK818_DCDC_EN_REG, 635 .enable_mask = BIT(2), 636 .owner = THIS_MODULE, 637 }, 638 RK8XX_DESC(RK818_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3600, 100, 639 RK818_BUCK4_ON_VSEL_REG, RK818_BUCK4_VSEL_MASK, 640 RK818_DCDC_EN_REG, BIT(3), 0), 641 RK8XX_DESC(RK818_ID_BOOST, "DCDC_BOOST", "boost", 4700, 5400, 100, 642 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_BOOST_ON_VSEL_MASK, 643 RK818_DCDC_EN_REG, BIT(4), 0), 644 RK8XX_DESC(RK818_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100, 645 RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 646 BIT(0), 400), 647 RK8XX_DESC(RK818_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100, 648 RK818_LDO2_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 649 BIT(1), 400), 650 { 651 .name = "LDO_REG3", 652 .supply_name = "vcc7", 653 .of_match = of_match_ptr("LDO_REG3"), 654 .regulators_node = of_match_ptr("regulators"), 655 .id = RK818_ID_LDO3, 656 .ops = &rk808_reg_ops_ranges, 657 .type = REGULATOR_VOLTAGE, 658 .n_voltages = 16, 659 .linear_ranges = rk808_ldo3_voltage_ranges, 660 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges), 661 .vsel_reg = RK818_LDO3_ON_VSEL_REG, 662 .vsel_mask = RK818_LDO3_ON_VSEL_MASK, 663 .enable_reg = RK818_LDO_EN_REG, 664 .enable_mask = BIT(2), 665 .enable_time = 400, 666 .owner = THIS_MODULE, 667 }, 668 RK8XX_DESC(RK818_ID_LDO4, "LDO_REG4", "vcc8", 1800, 3400, 100, 669 RK818_LDO4_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 670 BIT(3), 400), 671 RK8XX_DESC(RK818_ID_LDO5, "LDO_REG5", "vcc7", 1800, 3400, 100, 672 RK818_LDO5_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 673 BIT(4), 400), 674 RK8XX_DESC(RK818_ID_LDO6, "LDO_REG6", "vcc8", 800, 2500, 100, 675 RK818_LDO6_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 676 BIT(5), 400), 677 RK8XX_DESC(RK818_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100, 678 RK818_LDO7_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 679 BIT(6), 400), 680 RK8XX_DESC(RK818_ID_LDO8, "LDO_REG8", "vcc8", 1800, 3400, 100, 681 RK818_LDO8_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 682 BIT(7), 400), 683 RK8XX_DESC(RK818_ID_LDO9, "LDO_REG9", "vcc9", 1800, 3400, 100, 684 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_LDO_VSEL_MASK, 685 RK818_DCDC_EN_REG, BIT(5), 400), 686 RK8XX_DESC_SWITCH(RK818_ID_SWITCH, "SWITCH_REG", "vcc9", 687 RK818_DCDC_EN_REG, BIT(6)), 688 RK8XX_DESC_SWITCH(RK818_ID_HDMI_SWITCH, "HDMI_SWITCH", "h_5v", 689 RK818_H5V_EN_REG, BIT(0)), 690 RK8XX_DESC_SWITCH(RK818_ID_OTG_SWITCH, "OTG_SWITCH", "usb", 691 RK818_DCDC_EN_REG, BIT(7)), 692 }; 693 694 static int rk808_regulator_dt_parse_pdata(struct device *dev, 695 struct device *client_dev, 696 struct regmap *map, 697 struct rk808_regulator_data *pdata) 698 { 699 struct device_node *np; 700 int tmp, ret = 0, i; 701 702 np = of_get_child_by_name(client_dev->of_node, "regulators"); 703 if (!np) 704 return -ENXIO; 705 706 for (i = 0; i < ARRAY_SIZE(pdata->dvs_gpio); i++) { 707 pdata->dvs_gpio[i] = 708 devm_gpiod_get_index_optional(client_dev, "dvs", i, 709 GPIOD_OUT_LOW); 710 if (IS_ERR(pdata->dvs_gpio[i])) { 711 ret = PTR_ERR(pdata->dvs_gpio[i]); 712 dev_err(dev, "failed to get dvs%d gpio (%d)\n", i, ret); 713 goto dt_parse_end; 714 } 715 716 if (!pdata->dvs_gpio[i]) { 717 dev_warn(dev, "there is no dvs%d gpio\n", i); 718 continue; 719 } 720 721 tmp = i ? RK808_DVS2_POL : RK808_DVS1_POL; 722 ret = regmap_update_bits(map, RK808_IO_POL_REG, tmp, 723 gpiod_is_active_low(pdata->dvs_gpio[i]) ? 724 0 : tmp); 725 } 726 727 dt_parse_end: 728 of_node_put(np); 729 return ret; 730 } 731 732 static int rk808_regulator_probe(struct platform_device *pdev) 733 { 734 struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent); 735 struct i2c_client *client = rk808->i2c; 736 struct regulator_config config = {}; 737 struct regulator_dev *rk808_rdev; 738 struct rk808_regulator_data *pdata; 739 const struct regulator_desc *regulators; 740 int ret, i, nregulators; 741 742 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 743 if (!pdata) 744 return -ENOMEM; 745 746 ret = rk808_regulator_dt_parse_pdata(&pdev->dev, &client->dev, 747 rk808->regmap, pdata); 748 if (ret < 0) 749 return ret; 750 751 platform_set_drvdata(pdev, pdata); 752 753 switch (rk808->variant) { 754 case RK805_ID: 755 regulators = rk805_reg; 756 nregulators = RK805_NUM_REGULATORS; 757 break; 758 case RK808_ID: 759 regulators = rk808_reg; 760 nregulators = RK808_NUM_REGULATORS; 761 break; 762 case RK818_ID: 763 regulators = rk818_reg; 764 nregulators = RK818_NUM_REGULATORS; 765 break; 766 default: 767 dev_err(&client->dev, "unsupported RK8XX ID %lu\n", 768 rk808->variant); 769 return -EINVAL; 770 } 771 772 config.dev = &client->dev; 773 config.driver_data = pdata; 774 config.regmap = rk808->regmap; 775 776 /* Instantiate the regulators */ 777 for (i = 0; i < nregulators; i++) { 778 rk808_rdev = devm_regulator_register(&pdev->dev, 779 ®ulators[i], &config); 780 if (IS_ERR(rk808_rdev)) { 781 dev_err(&client->dev, 782 "failed to register %d regulator\n", i); 783 return PTR_ERR(rk808_rdev); 784 } 785 } 786 787 return 0; 788 } 789 790 static struct platform_driver rk808_regulator_driver = { 791 .probe = rk808_regulator_probe, 792 .driver = { 793 .name = "rk808-regulator" 794 }, 795 }; 796 797 module_platform_driver(rk808_regulator_driver); 798 799 MODULE_DESCRIPTION("regulator driver for the RK808/RK818 series PMICs"); 800 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>"); 801 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>"); 802 MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>"); 803 MODULE_LICENSE("GPL"); 804 MODULE_ALIAS("platform:rk808-regulator"); 805