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 RK8XX_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 = &rk808_reg_ops, \ 87 } 88 89 #define RK8XX_DESC_SWITCH(_id, _match, _supply, _ereg, _emask) \ 90 [_id] = { \ 91 .name = (_match), \ 92 .supply_name = (_supply), \ 93 .of_match = of_match_ptr(_match), \ 94 .regulators_node = of_match_ptr("regulators"), \ 95 .type = REGULATOR_VOLTAGE, \ 96 .id = (_id), \ 97 .enable_reg = (_ereg), \ 98 .enable_mask = (_emask), \ 99 .owner = THIS_MODULE, \ 100 .ops = &rk808_switch_ops \ 101 } 102 103 104 struct rk808_regulator_data { 105 struct gpio_desc *dvs_gpio[2]; 106 }; 107 108 static const int rk808_buck_config_regs[] = { 109 RK808_BUCK1_CONFIG_REG, 110 RK808_BUCK2_CONFIG_REG, 111 RK808_BUCK3_CONFIG_REG, 112 RK808_BUCK4_CONFIG_REG, 113 }; 114 115 static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = { 116 REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000), 117 REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0), 118 }; 119 120 static int rk808_buck1_2_get_voltage_sel_regmap(struct regulator_dev *rdev) 121 { 122 struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev); 123 int id = rdev_get_id(rdev); 124 struct gpio_desc *gpio = pdata->dvs_gpio[id]; 125 unsigned int val; 126 int ret; 127 128 if (!gpio || gpiod_get_value(gpio) == 0) 129 return regulator_get_voltage_sel_regmap(rdev); 130 131 ret = regmap_read(rdev->regmap, 132 rdev->desc->vsel_reg + RK808_DVS_REG_OFFSET, 133 &val); 134 if (ret != 0) 135 return ret; 136 137 val &= rdev->desc->vsel_mask; 138 val >>= ffs(rdev->desc->vsel_mask) - 1; 139 140 return val; 141 } 142 143 static int rk808_buck1_2_i2c_set_voltage_sel(struct regulator_dev *rdev, 144 unsigned sel) 145 { 146 int ret, delta_sel; 147 unsigned int old_sel, tmp, val, mask = rdev->desc->vsel_mask; 148 149 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val); 150 if (ret != 0) 151 return ret; 152 153 tmp = val & ~mask; 154 old_sel = val & mask; 155 old_sel >>= ffs(mask) - 1; 156 delta_sel = sel - old_sel; 157 158 /* 159 * If directly modify the register to change the voltage, we will face 160 * the risk of overshoot. Put it into a multi-step, can effectively 161 * avoid this problem, a step is 100mv here. 162 */ 163 while (delta_sel > MAX_STEPS_ONE_TIME) { 164 old_sel += MAX_STEPS_ONE_TIME; 165 val = old_sel << (ffs(mask) - 1); 166 val |= tmp; 167 168 /* 169 * i2c is 400kHz (2.5us per bit) and we must transmit _at least_ 170 * 3 bytes (24 bits) plus start and stop so 26 bits. So we've 171 * got more than 65 us between each voltage change and thus 172 * won't ramp faster than ~1500 uV / us. 173 */ 174 ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val); 175 delta_sel = sel - old_sel; 176 } 177 178 sel <<= ffs(mask) - 1; 179 val = tmp | sel; 180 ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val); 181 182 /* 183 * When we change the voltage register directly, the ramp rate is about 184 * 100000uv/us, wait 1us to make sure the target voltage to be stable, 185 * so we needn't wait extra time after that. 186 */ 187 udelay(1); 188 189 return ret; 190 } 191 192 static int rk808_buck1_2_set_voltage_sel(struct regulator_dev *rdev, 193 unsigned sel) 194 { 195 struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev); 196 int id = rdev_get_id(rdev); 197 struct gpio_desc *gpio = pdata->dvs_gpio[id]; 198 unsigned int reg = rdev->desc->vsel_reg; 199 unsigned old_sel; 200 int ret, gpio_level; 201 202 if (!gpio) 203 return rk808_buck1_2_i2c_set_voltage_sel(rdev, sel); 204 205 gpio_level = gpiod_get_value(gpio); 206 if (gpio_level == 0) { 207 reg += RK808_DVS_REG_OFFSET; 208 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &old_sel); 209 } else { 210 ret = regmap_read(rdev->regmap, 211 reg + RK808_DVS_REG_OFFSET, 212 &old_sel); 213 } 214 215 if (ret != 0) 216 return ret; 217 218 sel <<= ffs(rdev->desc->vsel_mask) - 1; 219 sel |= old_sel & ~rdev->desc->vsel_mask; 220 221 ret = regmap_write(rdev->regmap, reg, sel); 222 if (ret) 223 return ret; 224 225 gpiod_set_value(gpio, !gpio_level); 226 227 return ret; 228 } 229 230 static int rk808_buck1_2_set_voltage_time_sel(struct regulator_dev *rdev, 231 unsigned int old_selector, 232 unsigned int new_selector) 233 { 234 struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev); 235 int id = rdev_get_id(rdev); 236 struct gpio_desc *gpio = pdata->dvs_gpio[id]; 237 238 /* if there is no dvs1/2 pin, we don't need wait extra time here. */ 239 if (!gpio) 240 return 0; 241 242 return regulator_set_voltage_time_sel(rdev, old_selector, new_selector); 243 } 244 245 static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) 246 { 247 unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US; 248 unsigned int reg = rk808_buck_config_regs[rdev_get_id(rdev)]; 249 250 switch (ramp_delay) { 251 case 1 ... 2000: 252 ramp_value = RK808_RAMP_RATE_2MV_PER_US; 253 break; 254 case 2001 ... 4000: 255 ramp_value = RK808_RAMP_RATE_4MV_PER_US; 256 break; 257 case 4001 ... 6000: 258 ramp_value = RK808_RAMP_RATE_6MV_PER_US; 259 break; 260 case 6001 ... 10000: 261 break; 262 default: 263 pr_warn("%s ramp_delay: %d not supported, setting 10000\n", 264 rdev->desc->name, ramp_delay); 265 } 266 267 return regmap_update_bits(rdev->regmap, reg, 268 RK808_RAMP_RATE_MASK, ramp_value); 269 } 270 271 static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv) 272 { 273 unsigned int reg; 274 int sel = regulator_map_voltage_linear(rdev, uv, uv); 275 276 if (sel < 0) 277 return -EINVAL; 278 279 reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET; 280 281 return regmap_update_bits(rdev->regmap, reg, 282 rdev->desc->vsel_mask, 283 sel); 284 } 285 286 static int rk808_set_suspend_voltage_range(struct regulator_dev *rdev, int uv) 287 { 288 unsigned int reg; 289 int sel = regulator_map_voltage_linear_range(rdev, uv, uv); 290 291 if (sel < 0) 292 return -EINVAL; 293 294 reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET; 295 296 return regmap_update_bits(rdev->regmap, reg, 297 rdev->desc->vsel_mask, 298 sel); 299 } 300 301 static int rk808_set_suspend_enable(struct regulator_dev *rdev) 302 { 303 unsigned int reg; 304 305 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET; 306 307 return regmap_update_bits(rdev->regmap, reg, 308 rdev->desc->enable_mask, 309 0); 310 } 311 312 static int rk808_set_suspend_disable(struct regulator_dev *rdev) 313 { 314 unsigned int reg; 315 316 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET; 317 318 return regmap_update_bits(rdev->regmap, reg, 319 rdev->desc->enable_mask, 320 rdev->desc->enable_mask); 321 } 322 323 static struct regulator_ops rk808_buck1_2_ops = { 324 .list_voltage = regulator_list_voltage_linear, 325 .map_voltage = regulator_map_voltage_linear, 326 .get_voltage_sel = rk808_buck1_2_get_voltage_sel_regmap, 327 .set_voltage_sel = rk808_buck1_2_set_voltage_sel, 328 .set_voltage_time_sel = rk808_buck1_2_set_voltage_time_sel, 329 .enable = regulator_enable_regmap, 330 .disable = regulator_disable_regmap, 331 .is_enabled = regulator_is_enabled_regmap, 332 .set_ramp_delay = rk808_set_ramp_delay, 333 .set_suspend_voltage = rk808_set_suspend_voltage, 334 .set_suspend_enable = rk808_set_suspend_enable, 335 .set_suspend_disable = rk808_set_suspend_disable, 336 }; 337 338 static struct regulator_ops rk808_reg_ops = { 339 .list_voltage = regulator_list_voltage_linear, 340 .map_voltage = regulator_map_voltage_linear, 341 .get_voltage_sel = regulator_get_voltage_sel_regmap, 342 .set_voltage_sel = regulator_set_voltage_sel_regmap, 343 .enable = regulator_enable_regmap, 344 .disable = regulator_disable_regmap, 345 .is_enabled = regulator_is_enabled_regmap, 346 .set_suspend_voltage = rk808_set_suspend_voltage, 347 .set_suspend_enable = rk808_set_suspend_enable, 348 .set_suspend_disable = rk808_set_suspend_disable, 349 }; 350 351 static struct regulator_ops rk808_reg_ops_ranges = { 352 .list_voltage = regulator_list_voltage_linear_range, 353 .map_voltage = regulator_map_voltage_linear_range, 354 .get_voltage_sel = regulator_get_voltage_sel_regmap, 355 .set_voltage_sel = regulator_set_voltage_sel_regmap, 356 .enable = regulator_enable_regmap, 357 .disable = regulator_disable_regmap, 358 .is_enabled = regulator_is_enabled_regmap, 359 .set_suspend_voltage = rk808_set_suspend_voltage_range, 360 .set_suspend_enable = rk808_set_suspend_enable, 361 .set_suspend_disable = rk808_set_suspend_disable, 362 }; 363 364 static struct regulator_ops rk808_switch_ops = { 365 .enable = regulator_enable_regmap, 366 .disable = regulator_disable_regmap, 367 .is_enabled = regulator_is_enabled_regmap, 368 .set_suspend_enable = rk808_set_suspend_enable, 369 .set_suspend_disable = rk808_set_suspend_disable, 370 }; 371 372 static const struct regulator_desc rk808_reg[] = { 373 { 374 .name = "DCDC_REG1", 375 .supply_name = "vcc1", 376 .of_match = of_match_ptr("DCDC_REG1"), 377 .regulators_node = of_match_ptr("regulators"), 378 .id = RK808_ID_DCDC1, 379 .ops = &rk808_buck1_2_ops, 380 .type = REGULATOR_VOLTAGE, 381 .min_uV = 712500, 382 .uV_step = 12500, 383 .n_voltages = 64, 384 .vsel_reg = RK808_BUCK1_ON_VSEL_REG, 385 .vsel_mask = RK808_BUCK_VSEL_MASK, 386 .enable_reg = RK808_DCDC_EN_REG, 387 .enable_mask = BIT(0), 388 .owner = THIS_MODULE, 389 }, { 390 .name = "DCDC_REG2", 391 .supply_name = "vcc2", 392 .of_match = of_match_ptr("DCDC_REG2"), 393 .regulators_node = of_match_ptr("regulators"), 394 .id = RK808_ID_DCDC2, 395 .ops = &rk808_buck1_2_ops, 396 .type = REGULATOR_VOLTAGE, 397 .min_uV = 712500, 398 .uV_step = 12500, 399 .n_voltages = 64, 400 .vsel_reg = RK808_BUCK2_ON_VSEL_REG, 401 .vsel_mask = RK808_BUCK_VSEL_MASK, 402 .enable_reg = RK808_DCDC_EN_REG, 403 .enable_mask = BIT(1), 404 .owner = THIS_MODULE, 405 }, { 406 .name = "DCDC_REG3", 407 .supply_name = "vcc3", 408 .of_match = of_match_ptr("DCDC_REG3"), 409 .regulators_node = of_match_ptr("regulators"), 410 .id = RK808_ID_DCDC3, 411 .ops = &rk808_switch_ops, 412 .type = REGULATOR_VOLTAGE, 413 .n_voltages = 1, 414 .enable_reg = RK808_DCDC_EN_REG, 415 .enable_mask = BIT(2), 416 .owner = THIS_MODULE, 417 }, 418 RK8XX_DESC(RK808_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3300, 100, 419 RK808_BUCK4_ON_VSEL_REG, RK808_BUCK4_VSEL_MASK, 420 RK808_DCDC_EN_REG, BIT(3), 0), 421 RK8XX_DESC(RK808_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100, 422 RK808_LDO1_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 423 BIT(0), 400), 424 RK8XX_DESC(RK808_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100, 425 RK808_LDO2_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 426 BIT(1), 400), 427 { 428 .name = "LDO_REG3", 429 .supply_name = "vcc7", 430 .of_match = of_match_ptr("LDO_REG3"), 431 .regulators_node = of_match_ptr("regulators"), 432 .id = RK808_ID_LDO3, 433 .ops = &rk808_reg_ops_ranges, 434 .type = REGULATOR_VOLTAGE, 435 .n_voltages = 16, 436 .linear_ranges = rk808_ldo3_voltage_ranges, 437 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges), 438 .vsel_reg = RK808_LDO3_ON_VSEL_REG, 439 .vsel_mask = RK808_BUCK4_VSEL_MASK, 440 .enable_reg = RK808_LDO_EN_REG, 441 .enable_mask = BIT(2), 442 .enable_time = 400, 443 .owner = THIS_MODULE, 444 }, 445 RK8XX_DESC(RK808_ID_LDO4, "LDO_REG4", "vcc9", 1800, 3400, 100, 446 RK808_LDO4_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 447 BIT(3), 400), 448 RK8XX_DESC(RK808_ID_LDO5, "LDO_REG5", "vcc9", 1800, 3400, 100, 449 RK808_LDO5_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 450 BIT(4), 400), 451 RK8XX_DESC(RK808_ID_LDO6, "LDO_REG6", "vcc10", 800, 2500, 100, 452 RK808_LDO6_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 453 BIT(5), 400), 454 RK8XX_DESC(RK808_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100, 455 RK808_LDO7_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 456 BIT(6), 400), 457 RK8XX_DESC(RK808_ID_LDO8, "LDO_REG8", "vcc11", 1800, 3400, 100, 458 RK808_LDO8_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG, 459 BIT(7), 400), 460 RK8XX_DESC_SWITCH(RK808_ID_SWITCH1, "SWITCH_REG1", "vcc8", 461 RK808_DCDC_EN_REG, BIT(5)), 462 RK8XX_DESC_SWITCH(RK808_ID_SWITCH2, "SWITCH_REG2", "vcc12", 463 RK808_DCDC_EN_REG, BIT(6)), 464 }; 465 466 static const struct regulator_desc rk818_reg[] = { 467 { 468 .name = "DCDC_REG1", 469 .supply_name = "vcc1", 470 .of_match = of_match_ptr("DCDC_REG1"), 471 .regulators_node = of_match_ptr("regulators"), 472 .id = RK818_ID_DCDC1, 473 .ops = &rk808_reg_ops, 474 .type = REGULATOR_VOLTAGE, 475 .min_uV = 712500, 476 .uV_step = 12500, 477 .n_voltages = 64, 478 .vsel_reg = RK818_BUCK1_ON_VSEL_REG, 479 .vsel_mask = RK818_BUCK_VSEL_MASK, 480 .enable_reg = RK818_DCDC_EN_REG, 481 .enable_mask = BIT(0), 482 .owner = THIS_MODULE, 483 }, { 484 .name = "DCDC_REG2", 485 .supply_name = "vcc2", 486 .of_match = of_match_ptr("DCDC_REG2"), 487 .regulators_node = of_match_ptr("regulators"), 488 .id = RK818_ID_DCDC2, 489 .ops = &rk808_reg_ops, 490 .type = REGULATOR_VOLTAGE, 491 .min_uV = 712500, 492 .uV_step = 12500, 493 .n_voltages = 64, 494 .vsel_reg = RK818_BUCK2_ON_VSEL_REG, 495 .vsel_mask = RK818_BUCK_VSEL_MASK, 496 .enable_reg = RK818_DCDC_EN_REG, 497 .enable_mask = BIT(1), 498 .owner = THIS_MODULE, 499 }, { 500 .name = "DCDC_REG3", 501 .supply_name = "vcc3", 502 .of_match = of_match_ptr("DCDC_REG3"), 503 .regulators_node = of_match_ptr("regulators"), 504 .id = RK818_ID_DCDC3, 505 .ops = &rk808_switch_ops, 506 .type = REGULATOR_VOLTAGE, 507 .n_voltages = 1, 508 .enable_reg = RK818_DCDC_EN_REG, 509 .enable_mask = BIT(2), 510 .owner = THIS_MODULE, 511 }, 512 RK8XX_DESC(RK818_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3600, 100, 513 RK818_BUCK4_ON_VSEL_REG, RK818_BUCK4_VSEL_MASK, 514 RK818_DCDC_EN_REG, BIT(3), 0), 515 RK8XX_DESC(RK818_ID_BOOST, "DCDC_BOOST", "boost", 4700, 5400, 100, 516 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_BOOST_ON_VSEL_MASK, 517 RK818_DCDC_EN_REG, BIT(4), 0), 518 RK8XX_DESC(RK818_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100, 519 RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 520 BIT(0), 400), 521 RK8XX_DESC(RK818_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100, 522 RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 523 BIT(1), 400), 524 { 525 .name = "LDO_REG3", 526 .supply_name = "vcc7", 527 .of_match = of_match_ptr("LDO_REG3"), 528 .regulators_node = of_match_ptr("regulators"), 529 .id = RK818_ID_LDO3, 530 .ops = &rk808_reg_ops_ranges, 531 .type = REGULATOR_VOLTAGE, 532 .n_voltages = 16, 533 .linear_ranges = rk808_ldo3_voltage_ranges, 534 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges), 535 .vsel_reg = RK818_LDO3_ON_VSEL_REG, 536 .vsel_mask = RK818_LDO3_ON_VSEL_MASK, 537 .enable_reg = RK818_LDO_EN_REG, 538 .enable_mask = BIT(2), 539 .enable_time = 400, 540 .owner = THIS_MODULE, 541 }, 542 RK8XX_DESC(RK818_ID_LDO4, "LDO_REG4", "vcc8", 1800, 3400, 100, 543 RK818_LDO4_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 544 BIT(3), 400), 545 RK8XX_DESC(RK818_ID_LDO5, "LDO_REG5", "vcc7", 1800, 3400, 100, 546 RK818_LDO5_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 547 BIT(4), 400), 548 RK8XX_DESC(RK818_ID_LDO6, "LDO_REG6", "vcc8", 800, 2500, 100, 549 RK818_LDO6_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 550 BIT(5), 400), 551 RK8XX_DESC(RK818_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100, 552 RK818_LDO7_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 553 BIT(6), 400), 554 RK8XX_DESC(RK818_ID_LDO8, "LDO_REG8", "vcc8", 1800, 3400, 100, 555 RK818_LDO8_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG, 556 BIT(7), 400), 557 RK8XX_DESC(RK818_ID_LDO9, "LDO_REG9", "vcc9", 1800, 3400, 100, 558 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_LDO_VSEL_MASK, 559 RK818_DCDC_EN_REG, BIT(5), 400), 560 RK8XX_DESC_SWITCH(RK818_ID_SWITCH, "SWITCH_REG", "vcc9", 561 RK818_DCDC_EN_REG, BIT(6)), 562 RK8XX_DESC_SWITCH(RK818_ID_HDMI_SWITCH, "HDMI_SWITCH", "h_5v", 563 RK818_H5V_EN_REG, BIT(0)), 564 RK8XX_DESC_SWITCH(RK818_ID_OTG_SWITCH, "OTG_SWITCH", "usb", 565 RK818_DCDC_EN_REG, BIT(7)), 566 }; 567 568 static int rk808_regulator_dt_parse_pdata(struct device *dev, 569 struct device *client_dev, 570 struct regmap *map, 571 struct rk808_regulator_data *pdata) 572 { 573 struct device_node *np; 574 int tmp, ret = 0, i; 575 576 np = of_get_child_by_name(client_dev->of_node, "regulators"); 577 if (!np) 578 return -ENXIO; 579 580 for (i = 0; i < ARRAY_SIZE(pdata->dvs_gpio); i++) { 581 pdata->dvs_gpio[i] = 582 devm_gpiod_get_index_optional(client_dev, "dvs", i, 583 GPIOD_OUT_LOW); 584 if (IS_ERR(pdata->dvs_gpio[i])) { 585 ret = PTR_ERR(pdata->dvs_gpio[i]); 586 dev_err(dev, "failed to get dvs%d gpio (%d)\n", i, ret); 587 goto dt_parse_end; 588 } 589 590 if (!pdata->dvs_gpio[i]) { 591 dev_warn(dev, "there is no dvs%d gpio\n", i); 592 continue; 593 } 594 595 tmp = i ? RK808_DVS2_POL : RK808_DVS1_POL; 596 ret = regmap_update_bits(map, RK808_IO_POL_REG, tmp, 597 gpiod_is_active_low(pdata->dvs_gpio[i]) ? 598 0 : tmp); 599 } 600 601 dt_parse_end: 602 of_node_put(np); 603 return ret; 604 } 605 606 static int rk808_regulator_probe(struct platform_device *pdev) 607 { 608 struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent); 609 struct i2c_client *client = rk808->i2c; 610 struct regulator_config config = {}; 611 struct regulator_dev *rk808_rdev; 612 struct rk808_regulator_data *pdata; 613 const struct regulator_desc *regulators; 614 int ret, i, nregulators; 615 616 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 617 if (!pdata) 618 return -ENOMEM; 619 620 ret = rk808_regulator_dt_parse_pdata(&pdev->dev, &client->dev, 621 rk808->regmap, pdata); 622 if (ret < 0) 623 return ret; 624 625 platform_set_drvdata(pdev, pdata); 626 627 switch (rk808->variant) { 628 case RK808_ID: 629 regulators = rk808_reg; 630 nregulators = RK808_NUM_REGULATORS; 631 break; 632 case RK818_ID: 633 regulators = rk818_reg; 634 nregulators = RK818_NUM_REGULATORS; 635 break; 636 default: 637 dev_err(&client->dev, "unsupported RK8XX ID %lu\n", 638 rk808->variant); 639 return -EINVAL; 640 } 641 642 config.dev = &client->dev; 643 config.driver_data = pdata; 644 config.regmap = rk808->regmap; 645 646 /* Instantiate the regulators */ 647 for (i = 0; i < nregulators; i++) { 648 rk808_rdev = devm_regulator_register(&pdev->dev, 649 ®ulators[i], &config); 650 if (IS_ERR(rk808_rdev)) { 651 dev_err(&client->dev, 652 "failed to register %d regulator\n", i); 653 return PTR_ERR(rk808_rdev); 654 } 655 } 656 657 return 0; 658 } 659 660 static struct platform_driver rk808_regulator_driver = { 661 .probe = rk808_regulator_probe, 662 .driver = { 663 .name = "rk808-regulator" 664 }, 665 }; 666 667 module_platform_driver(rk808_regulator_driver); 668 669 MODULE_DESCRIPTION("regulator driver for the RK808/RK818 series PMICs"); 670 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>"); 671 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>"); 672 MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>"); 673 MODULE_LICENSE("GPL"); 674 MODULE_ALIAS("platform:rk808-regulator"); 675