1 /* 2 * Regulator driver for Rockchip RK808 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 * This program is free software; you can redistribute it and/or modify it 10 * under the terms and conditions of the GNU General Public License, 11 * version 2, as published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope it will be useful, but WITHOUT 14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 16 * more details. 17 */ 18 19 #include <linux/module.h> 20 #include <linux/i2c.h> 21 #include <linux/mfd/rk808.h> 22 #include <linux/of_device.h> 23 #include <linux/regulator/driver.h> 24 #include <linux/regulator/of_regulator.h> 25 26 /* Field Definitions */ 27 #define RK808_BUCK_VSEL_MASK 0x3f 28 #define RK808_BUCK4_VSEL_MASK 0xf 29 #define RK808_LDO_VSEL_MASK 0x1f 30 31 /* Ramp rate definitions for buck1 / buck2 only */ 32 #define RK808_RAMP_RATE_OFFSET 3 33 #define RK808_RAMP_RATE_MASK (3 << RK808_RAMP_RATE_OFFSET) 34 #define RK808_RAMP_RATE_2MV_PER_US (0 << RK808_RAMP_RATE_OFFSET) 35 #define RK808_RAMP_RATE_4MV_PER_US (1 << RK808_RAMP_RATE_OFFSET) 36 #define RK808_RAMP_RATE_6MV_PER_US (2 << RK808_RAMP_RATE_OFFSET) 37 #define RK808_RAMP_RATE_10MV_PER_US (3 << RK808_RAMP_RATE_OFFSET) 38 39 /* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */ 40 #define RK808_SLP_REG_OFFSET 1 41 42 /* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */ 43 #define RK808_SLP_SET_OFF_REG_OFFSET 2 44 45 static const int rk808_buck_config_regs[] = { 46 RK808_BUCK1_CONFIG_REG, 47 RK808_BUCK2_CONFIG_REG, 48 RK808_BUCK3_CONFIG_REG, 49 RK808_BUCK4_CONFIG_REG, 50 }; 51 52 static const struct regulator_linear_range rk808_buck_voltage_ranges[] = { 53 REGULATOR_LINEAR_RANGE(712500, 0, 63, 12500), 54 }; 55 56 static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = { 57 REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000), 58 }; 59 60 static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = { 61 REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000), 62 }; 63 64 static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = { 65 REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000), 66 REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0), 67 }; 68 69 static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = { 70 REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000), 71 }; 72 73 static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) 74 { 75 unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US; 76 unsigned int reg = rk808_buck_config_regs[rdev->desc->id - 77 RK808_ID_DCDC1]; 78 79 switch (ramp_delay) { 80 case 1 ... 2000: 81 ramp_value = RK808_RAMP_RATE_2MV_PER_US; 82 break; 83 case 2001 ... 4000: 84 ramp_value = RK808_RAMP_RATE_4MV_PER_US; 85 break; 86 case 4001 ... 6000: 87 ramp_value = RK808_RAMP_RATE_6MV_PER_US; 88 break; 89 case 6001 ... 10000: 90 break; 91 default: 92 pr_warn("%s ramp_delay: %d not supported, setting 10000\n", 93 rdev->desc->name, ramp_delay); 94 } 95 96 return regmap_update_bits(rdev->regmap, reg, 97 RK808_RAMP_RATE_MASK, ramp_value); 98 } 99 100 static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv) 101 { 102 unsigned int reg; 103 int sel = regulator_map_voltage_linear_range(rdev, uv, uv); 104 105 if (sel < 0) 106 return -EINVAL; 107 108 reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET; 109 110 return regmap_update_bits(rdev->regmap, reg, 111 rdev->desc->vsel_mask, 112 sel); 113 } 114 115 static int rk808_set_suspend_enable(struct regulator_dev *rdev) 116 { 117 unsigned int reg; 118 119 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET; 120 121 return regmap_update_bits(rdev->regmap, reg, 122 rdev->desc->enable_mask, 123 0); 124 } 125 126 static int rk808_set_suspend_disable(struct regulator_dev *rdev) 127 { 128 unsigned int reg; 129 130 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET; 131 132 return regmap_update_bits(rdev->regmap, reg, 133 rdev->desc->enable_mask, 134 rdev->desc->enable_mask); 135 } 136 137 static struct regulator_ops rk808_buck1_2_ops = { 138 .list_voltage = regulator_list_voltage_linear_range, 139 .map_voltage = regulator_map_voltage_linear_range, 140 .get_voltage_sel = regulator_get_voltage_sel_regmap, 141 .set_voltage_sel = regulator_set_voltage_sel_regmap, 142 .enable = regulator_enable_regmap, 143 .disable = regulator_disable_regmap, 144 .is_enabled = regulator_is_enabled_regmap, 145 .set_ramp_delay = rk808_set_ramp_delay, 146 .set_suspend_voltage = rk808_set_suspend_voltage, 147 .set_suspend_enable = rk808_set_suspend_enable, 148 .set_suspend_disable = rk808_set_suspend_disable, 149 }; 150 151 static struct regulator_ops rk808_reg_ops = { 152 .list_voltage = regulator_list_voltage_linear_range, 153 .map_voltage = regulator_map_voltage_linear_range, 154 .get_voltage_sel = regulator_get_voltage_sel_regmap, 155 .set_voltage_sel = regulator_set_voltage_sel_regmap, 156 .enable = regulator_enable_regmap, 157 .disable = regulator_disable_regmap, 158 .is_enabled = regulator_is_enabled_regmap, 159 .set_suspend_voltage = rk808_set_suspend_voltage, 160 .set_suspend_enable = rk808_set_suspend_enable, 161 .set_suspend_disable = rk808_set_suspend_disable, 162 }; 163 164 static struct regulator_ops rk808_switch_ops = { 165 .enable = regulator_enable_regmap, 166 .disable = regulator_disable_regmap, 167 .is_enabled = regulator_is_enabled_regmap, 168 .set_suspend_enable = rk808_set_suspend_enable, 169 .set_suspend_disable = rk808_set_suspend_disable, 170 }; 171 172 static const struct regulator_desc rk808_reg[] = { 173 { 174 .name = "DCDC_REG1", 175 .supply_name = "vcc1", 176 .id = RK808_ID_DCDC1, 177 .ops = &rk808_buck1_2_ops, 178 .type = REGULATOR_VOLTAGE, 179 .n_voltages = 64, 180 .linear_ranges = rk808_buck_voltage_ranges, 181 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges), 182 .vsel_reg = RK808_BUCK1_ON_VSEL_REG, 183 .vsel_mask = RK808_BUCK_VSEL_MASK, 184 .enable_reg = RK808_DCDC_EN_REG, 185 .enable_mask = BIT(0), 186 .owner = THIS_MODULE, 187 }, { 188 .name = "DCDC_REG2", 189 .supply_name = "vcc2", 190 .id = RK808_ID_DCDC2, 191 .ops = &rk808_buck1_2_ops, 192 .type = REGULATOR_VOLTAGE, 193 .n_voltages = 64, 194 .linear_ranges = rk808_buck_voltage_ranges, 195 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges), 196 .vsel_reg = RK808_BUCK2_ON_VSEL_REG, 197 .vsel_mask = RK808_BUCK_VSEL_MASK, 198 .enable_reg = RK808_DCDC_EN_REG, 199 .enable_mask = BIT(1), 200 .owner = THIS_MODULE, 201 }, { 202 .name = "DCDC_REG3", 203 .supply_name = "vcc3", 204 .id = RK808_ID_DCDC3, 205 .ops = &rk808_switch_ops, 206 .type = REGULATOR_VOLTAGE, 207 .n_voltages = 1, 208 .enable_reg = RK808_DCDC_EN_REG, 209 .enable_mask = BIT(2), 210 .owner = THIS_MODULE, 211 }, { 212 .name = "DCDC_REG4", 213 .supply_name = "vcc4", 214 .id = RK808_ID_DCDC4, 215 .ops = &rk808_reg_ops, 216 .type = REGULATOR_VOLTAGE, 217 .n_voltages = 16, 218 .linear_ranges = rk808_buck4_voltage_ranges, 219 .n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges), 220 .vsel_reg = RK808_BUCK4_ON_VSEL_REG, 221 .vsel_mask = RK808_BUCK4_VSEL_MASK, 222 .enable_reg = RK808_DCDC_EN_REG, 223 .enable_mask = BIT(3), 224 .owner = THIS_MODULE, 225 }, { 226 .name = "LDO_REG1", 227 .supply_name = "vcc6", 228 .id = RK808_ID_LDO1, 229 .ops = &rk808_reg_ops, 230 .type = REGULATOR_VOLTAGE, 231 .n_voltages = 17, 232 .linear_ranges = rk808_ldo_voltage_ranges, 233 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), 234 .vsel_reg = RK808_LDO1_ON_VSEL_REG, 235 .vsel_mask = RK808_LDO_VSEL_MASK, 236 .enable_reg = RK808_LDO_EN_REG, 237 .enable_mask = BIT(0), 238 .enable_time = 400, 239 .owner = THIS_MODULE, 240 }, { 241 .name = "LDO_REG2", 242 .supply_name = "vcc6", 243 .id = RK808_ID_LDO2, 244 .ops = &rk808_reg_ops, 245 .type = REGULATOR_VOLTAGE, 246 .n_voltages = 17, 247 .linear_ranges = rk808_ldo_voltage_ranges, 248 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), 249 .vsel_reg = RK808_LDO2_ON_VSEL_REG, 250 .vsel_mask = RK808_LDO_VSEL_MASK, 251 .enable_reg = RK808_LDO_EN_REG, 252 .enable_mask = BIT(1), 253 .enable_time = 400, 254 .owner = THIS_MODULE, 255 }, { 256 .name = "LDO_REG3", 257 .supply_name = "vcc7", 258 .id = RK808_ID_LDO3, 259 .ops = &rk808_reg_ops, 260 .type = REGULATOR_VOLTAGE, 261 .n_voltages = 16, 262 .linear_ranges = rk808_ldo3_voltage_ranges, 263 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges), 264 .vsel_reg = RK808_LDO3_ON_VSEL_REG, 265 .vsel_mask = RK808_BUCK4_VSEL_MASK, 266 .enable_reg = RK808_LDO_EN_REG, 267 .enable_mask = BIT(2), 268 .enable_time = 400, 269 .owner = THIS_MODULE, 270 }, { 271 .name = "LDO_REG4", 272 .supply_name = "vcc9", 273 .id = RK808_ID_LDO4, 274 .ops = &rk808_reg_ops, 275 .type = REGULATOR_VOLTAGE, 276 .n_voltages = 17, 277 .linear_ranges = rk808_ldo_voltage_ranges, 278 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), 279 .vsel_reg = RK808_LDO4_ON_VSEL_REG, 280 .vsel_mask = RK808_LDO_VSEL_MASK, 281 .enable_reg = RK808_LDO_EN_REG, 282 .enable_mask = BIT(3), 283 .enable_time = 400, 284 .owner = THIS_MODULE, 285 }, { 286 .name = "LDO_REG5", 287 .supply_name = "vcc9", 288 .id = RK808_ID_LDO5, 289 .ops = &rk808_reg_ops, 290 .type = REGULATOR_VOLTAGE, 291 .n_voltages = 17, 292 .linear_ranges = rk808_ldo_voltage_ranges, 293 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), 294 .vsel_reg = RK808_LDO5_ON_VSEL_REG, 295 .vsel_mask = RK808_LDO_VSEL_MASK, 296 .enable_reg = RK808_LDO_EN_REG, 297 .enable_mask = BIT(4), 298 .enable_time = 400, 299 .owner = THIS_MODULE, 300 }, { 301 .name = "LDO_REG6", 302 .supply_name = "vcc10", 303 .id = RK808_ID_LDO6, 304 .ops = &rk808_reg_ops, 305 .type = REGULATOR_VOLTAGE, 306 .n_voltages = 18, 307 .linear_ranges = rk808_ldo6_voltage_ranges, 308 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges), 309 .vsel_reg = RK808_LDO6_ON_VSEL_REG, 310 .vsel_mask = RK808_LDO_VSEL_MASK, 311 .enable_reg = RK808_LDO_EN_REG, 312 .enable_mask = BIT(5), 313 .enable_time = 400, 314 .owner = THIS_MODULE, 315 }, { 316 .name = "LDO_REG7", 317 .supply_name = "vcc7", 318 .id = RK808_ID_LDO7, 319 .ops = &rk808_reg_ops, 320 .type = REGULATOR_VOLTAGE, 321 .n_voltages = 18, 322 .linear_ranges = rk808_ldo6_voltage_ranges, 323 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges), 324 .vsel_reg = RK808_LDO7_ON_VSEL_REG, 325 .vsel_mask = RK808_LDO_VSEL_MASK, 326 .enable_reg = RK808_LDO_EN_REG, 327 .enable_mask = BIT(6), 328 .enable_time = 400, 329 .owner = THIS_MODULE, 330 }, { 331 .name = "LDO_REG8", 332 .supply_name = "vcc11", 333 .id = RK808_ID_LDO8, 334 .ops = &rk808_reg_ops, 335 .type = REGULATOR_VOLTAGE, 336 .n_voltages = 17, 337 .linear_ranges = rk808_ldo_voltage_ranges, 338 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), 339 .vsel_reg = RK808_LDO8_ON_VSEL_REG, 340 .vsel_mask = RK808_LDO_VSEL_MASK, 341 .enable_reg = RK808_LDO_EN_REG, 342 .enable_mask = BIT(7), 343 .enable_time = 400, 344 .owner = THIS_MODULE, 345 }, { 346 .name = "SWITCH_REG1", 347 .supply_name = "vcc8", 348 .id = RK808_ID_SWITCH1, 349 .ops = &rk808_switch_ops, 350 .type = REGULATOR_VOLTAGE, 351 .enable_reg = RK808_DCDC_EN_REG, 352 .enable_mask = BIT(5), 353 .owner = THIS_MODULE, 354 }, { 355 .name = "SWITCH_REG2", 356 .supply_name = "vcc12", 357 .id = RK808_ID_SWITCH2, 358 .ops = &rk808_switch_ops, 359 .type = REGULATOR_VOLTAGE, 360 .enable_reg = RK808_DCDC_EN_REG, 361 .enable_mask = BIT(6), 362 .owner = THIS_MODULE, 363 }, 364 }; 365 366 static struct of_regulator_match rk808_reg_matches[] = { 367 [RK808_ID_DCDC1] = { .name = "DCDC_REG1" }, 368 [RK808_ID_DCDC2] = { .name = "DCDC_REG2" }, 369 [RK808_ID_DCDC3] = { .name = "DCDC_REG3" }, 370 [RK808_ID_DCDC4] = { .name = "DCDC_REG4" }, 371 [RK808_ID_LDO1] = { .name = "LDO_REG1" }, 372 [RK808_ID_LDO2] = { .name = "LDO_REG2" }, 373 [RK808_ID_LDO3] = { .name = "LDO_REG3" }, 374 [RK808_ID_LDO4] = { .name = "LDO_REG4" }, 375 [RK808_ID_LDO5] = { .name = "LDO_REG5" }, 376 [RK808_ID_LDO6] = { .name = "LDO_REG6" }, 377 [RK808_ID_LDO7] = { .name = "LDO_REG7" }, 378 [RK808_ID_LDO8] = { .name = "LDO_REG8" }, 379 [RK808_ID_SWITCH1] = { .name = "SWITCH_REG1" }, 380 [RK808_ID_SWITCH2] = { .name = "SWITCH_REG2" }, 381 }; 382 383 static int rk808_regulator_probe(struct platform_device *pdev) 384 { 385 struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent); 386 struct i2c_client *client = rk808->i2c; 387 struct device_node *reg_np; 388 struct regulator_config config = {}; 389 struct regulator_dev *rk808_rdev; 390 int ret, i; 391 392 reg_np = of_get_child_by_name(client->dev.of_node, "regulators"); 393 if (!reg_np) 394 return -ENXIO; 395 396 ret = of_regulator_match(&pdev->dev, reg_np, rk808_reg_matches, 397 RK808_NUM_REGULATORS); 398 of_node_put(reg_np); 399 if (ret < 0) 400 return ret; 401 402 /* Instantiate the regulators */ 403 for (i = 0; i < RK808_NUM_REGULATORS; i++) { 404 if (!rk808_reg_matches[i].init_data || 405 !rk808_reg_matches[i].of_node) 406 continue; 407 408 config.dev = &client->dev; 409 config.driver_data = rk808; 410 config.regmap = rk808->regmap; 411 config.of_node = rk808_reg_matches[i].of_node; 412 config.init_data = rk808_reg_matches[i].init_data; 413 414 rk808_rdev = devm_regulator_register(&pdev->dev, 415 &rk808_reg[i], &config); 416 if (IS_ERR(rk808_rdev)) { 417 dev_err(&client->dev, 418 "failed to register %d regulator\n", i); 419 return PTR_ERR(rk808_rdev); 420 } 421 } 422 423 return 0; 424 } 425 426 static struct platform_driver rk808_regulator_driver = { 427 .probe = rk808_regulator_probe, 428 .driver = { 429 .name = "rk808-regulator", 430 }, 431 }; 432 433 module_platform_driver(rk808_regulator_driver); 434 435 MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs"); 436 MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>"); 437 MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>"); 438 MODULE_LICENSE("GPL"); 439 MODULE_ALIAS("platform:rk808-regulator"); 440