1 /* 2 * tps65218-regulator.c 3 * 4 * Regulator driver for TPS65218 PMIC 5 * 6 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/ 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 13 * kind, whether expressed or implied; without even the implied warranty 14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License version 2 for more details. 16 */ 17 18 #include <linux/kernel.h> 19 #include <linux/module.h> 20 #include <linux/device.h> 21 #include <linux/init.h> 22 #include <linux/err.h> 23 #include <linux/platform_device.h> 24 #include <linux/of_device.h> 25 #include <linux/regulator/of_regulator.h> 26 #include <linux/regulator/driver.h> 27 #include <linux/regulator/machine.h> 28 #include <linux/mfd/tps65218.h> 29 30 enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4, 31 DCDC5, DCDC6, LDO1, LS3 }; 32 33 #define TPS65218_REGULATOR(_name, _id, _type, _ops, _n, _vr, _vm, _er, _em, \ 34 _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm) \ 35 { \ 36 .name = _name, \ 37 .id = _id, \ 38 .ops = &_ops, \ 39 .n_voltages = _n, \ 40 .type = _type, \ 41 .owner = THIS_MODULE, \ 42 .vsel_reg = _vr, \ 43 .vsel_mask = _vm, \ 44 .csel_reg = _cr, \ 45 .csel_mask = _cm, \ 46 .enable_reg = _er, \ 47 .enable_mask = _em, \ 48 .volt_table = NULL, \ 49 .linear_ranges = _lr, \ 50 .n_linear_ranges = _nlr, \ 51 .ramp_delay = _delay, \ 52 .fixed_uV = _fuv, \ 53 .bypass_reg = _sr, \ 54 .bypass_mask = _sm, \ 55 } \ 56 57 #define TPS65218_INFO(_id, _nm, _min, _max) \ 58 [_id] = { \ 59 .id = _id, \ 60 .name = _nm, \ 61 .min_uV = _min, \ 62 .max_uV = _max, \ 63 } 64 65 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = { 66 REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), 67 REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), 68 }; 69 70 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = { 71 REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), 72 REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), 73 }; 74 75 static const struct regulator_linear_range dcdc4_ranges[] = { 76 REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), 77 REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000), 78 }; 79 80 static struct tps_info tps65218_pmic_regs[] = { 81 TPS65218_INFO(DCDC1, "DCDC1", 850000, 1675000), 82 TPS65218_INFO(DCDC2, "DCDC2", 850000, 1675000), 83 TPS65218_INFO(DCDC3, "DCDC3", 900000, 3400000), 84 TPS65218_INFO(DCDC4, "DCDC4", 1175000, 3400000), 85 TPS65218_INFO(DCDC5, "DCDC5", 1000000, 1000000), 86 TPS65218_INFO(DCDC6, "DCDC6", 1800000, 1800000), 87 TPS65218_INFO(LDO1, "LDO1", 900000, 3400000), 88 TPS65218_INFO(LS3, "LS3", -1, -1), 89 }; 90 91 #define TPS65218_OF_MATCH(comp, label) \ 92 { \ 93 .compatible = comp, \ 94 .data = &label, \ 95 } 96 97 static const struct of_device_id tps65218_of_match[] = { 98 TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]), 99 TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]), 100 TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]), 101 TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]), 102 TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]), 103 TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]), 104 TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]), 105 TPS65218_OF_MATCH("ti,tps65218-ls3", tps65218_pmic_regs[LS3]), 106 { } 107 }; 108 MODULE_DEVICE_TABLE(of, tps65218_of_match); 109 110 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, 111 unsigned selector) 112 { 113 int ret; 114 struct tps65218 *tps = rdev_get_drvdata(dev); 115 unsigned int rid = rdev_get_id(dev); 116 117 /* Set the voltage based on vsel value and write protect level is 2 */ 118 ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, 119 selector, TPS65218_PROTECT_L1); 120 121 /* Set GO bit for DCDC1/2 to initiate voltage transistion */ 122 switch (rid) { 123 case TPS65218_DCDC_1: 124 case TPS65218_DCDC_2: 125 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, 126 TPS65218_SLEW_RATE_GO, 127 TPS65218_SLEW_RATE_GO, 128 TPS65218_PROTECT_L1); 129 break; 130 } 131 132 return ret; 133 } 134 135 static int tps65218_pmic_enable(struct regulator_dev *dev) 136 { 137 struct tps65218 *tps = rdev_get_drvdata(dev); 138 int rid = rdev_get_id(dev); 139 140 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 141 return -EINVAL; 142 143 /* Enable the regulator and password protection is level 1 */ 144 return tps65218_set_bits(tps, dev->desc->enable_reg, 145 dev->desc->enable_mask, dev->desc->enable_mask, 146 TPS65218_PROTECT_L1); 147 } 148 149 static int tps65218_pmic_disable(struct regulator_dev *dev) 150 { 151 struct tps65218 *tps = rdev_get_drvdata(dev); 152 int rid = rdev_get_id(dev); 153 154 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 155 return -EINVAL; 156 157 /* Disable the regulator and password protection is level 1 */ 158 return tps65218_clear_bits(tps, dev->desc->enable_reg, 159 dev->desc->enable_mask, TPS65218_PROTECT_L1); 160 } 161 162 static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev) 163 { 164 struct tps65218 *tps = rdev_get_drvdata(dev); 165 unsigned int rid = rdev_get_id(dev); 166 167 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 168 return -EINVAL; 169 170 return tps65218_clear_bits(tps, dev->desc->bypass_reg, 171 dev->desc->bypass_mask, 172 TPS65218_PROTECT_L1); 173 } 174 175 static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev) 176 { 177 struct tps65218 *tps = rdev_get_drvdata(dev); 178 unsigned int rid = rdev_get_id(dev); 179 180 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 181 return -EINVAL; 182 183 /* 184 * Certain revisions of TPS65218 will need to have DCDC3 regulator 185 * enabled always, otherwise an immediate system reboot will occur 186 * during poweroff. 187 */ 188 if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1) 189 return 0; 190 191 if (!tps->info[rid]->strobe) { 192 if (rid == TPS65218_DCDC_3) 193 tps->info[rid]->strobe = 3; 194 else 195 return -EINVAL; 196 } 197 198 return tps65218_set_bits(tps, dev->desc->bypass_reg, 199 dev->desc->bypass_mask, 200 tps->info[rid]->strobe, 201 TPS65218_PROTECT_L1); 202 } 203 204 /* Operations permitted on DCDC1, DCDC2 */ 205 static struct regulator_ops tps65218_dcdc12_ops = { 206 .is_enabled = regulator_is_enabled_regmap, 207 .enable = tps65218_pmic_enable, 208 .disable = tps65218_pmic_disable, 209 .get_voltage_sel = regulator_get_voltage_sel_regmap, 210 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 211 .list_voltage = regulator_list_voltage_linear_range, 212 .map_voltage = regulator_map_voltage_linear_range, 213 .set_voltage_time_sel = regulator_set_voltage_time_sel, 214 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 215 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 216 }; 217 218 /* Operations permitted on DCDC3, DCDC4 and LDO1 */ 219 static struct regulator_ops tps65218_ldo1_dcdc34_ops = { 220 .is_enabled = regulator_is_enabled_regmap, 221 .enable = tps65218_pmic_enable, 222 .disable = tps65218_pmic_disable, 223 .get_voltage_sel = regulator_get_voltage_sel_regmap, 224 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 225 .list_voltage = regulator_list_voltage_linear_range, 226 .map_voltage = regulator_map_voltage_linear_range, 227 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 228 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 229 }; 230 231 static const int ls3_currents[] = { 100, 200, 500, 1000 }; 232 233 static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev, 234 int lim_uA) 235 { 236 unsigned int index = 0; 237 unsigned int num_currents = ARRAY_SIZE(ls3_currents); 238 struct tps65218 *tps = rdev_get_drvdata(dev); 239 240 while (index < num_currents && ls3_currents[index] != lim_uA) 241 index++; 242 243 if (index == num_currents) 244 return -EINVAL; 245 246 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, 247 index << 2, TPS65218_PROTECT_L1); 248 } 249 250 static int tps65218_pmic_set_current_limit(struct regulator_dev *dev, 251 int min_uA, int max_uA) 252 { 253 int index = 0; 254 unsigned int num_currents = ARRAY_SIZE(ls3_currents); 255 struct tps65218 *tps = rdev_get_drvdata(dev); 256 257 while (index < num_currents && ls3_currents[index] < max_uA) 258 index++; 259 260 index--; 261 262 if (index < 0 || ls3_currents[index] < min_uA) 263 return -EINVAL; 264 265 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, 266 index << 2, TPS65218_PROTECT_L1); 267 } 268 269 static int tps65218_pmic_get_current_limit(struct regulator_dev *dev) 270 { 271 int retval; 272 unsigned int index; 273 struct tps65218 *tps = rdev_get_drvdata(dev); 274 275 retval = tps65218_reg_read(tps, dev->desc->csel_reg, &index); 276 if (retval < 0) 277 return retval; 278 279 index = (index & dev->desc->csel_mask) >> 2; 280 281 return ls3_currents[index]; 282 } 283 284 static struct regulator_ops tps65218_ls3_ops = { 285 .is_enabled = regulator_is_enabled_regmap, 286 .enable = tps65218_pmic_enable, 287 .disable = tps65218_pmic_disable, 288 .set_input_current_limit = tps65218_pmic_set_input_current_lim, 289 .set_current_limit = tps65218_pmic_set_current_limit, 290 .get_current_limit = tps65218_pmic_get_current_limit, 291 }; 292 293 /* Operations permitted on DCDC5, DCDC6 */ 294 static struct regulator_ops tps65218_dcdc56_pmic_ops = { 295 .is_enabled = regulator_is_enabled_regmap, 296 .enable = tps65218_pmic_enable, 297 .disable = tps65218_pmic_disable, 298 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 299 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 300 }; 301 302 static const struct regulator_desc regulators[] = { 303 TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, REGULATOR_VOLTAGE, 304 tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC1, 305 TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1, 306 TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges, 307 2, 4000, 0, TPS65218_REG_SEQ3, 308 TPS65218_SEQ3_DC1_SEQ_MASK), 309 TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, REGULATOR_VOLTAGE, 310 tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC2, 311 TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1, 312 TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges, 313 2, 4000, 0, TPS65218_REG_SEQ3, 314 TPS65218_SEQ3_DC2_SEQ_MASK), 315 TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, REGULATOR_VOLTAGE, 316 tps65218_ldo1_dcdc34_ops, 64, 317 TPS65218_REG_CONTROL_DCDC3, 318 TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, 319 TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2, 320 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK), 321 TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, REGULATOR_VOLTAGE, 322 tps65218_ldo1_dcdc34_ops, 53, 323 TPS65218_REG_CONTROL_DCDC4, 324 TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1, 325 TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2, 326 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK), 327 TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, REGULATOR_VOLTAGE, 328 tps65218_dcdc56_pmic_ops, 1, -1, -1, 329 TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, 0, 330 NULL, 0, 0, 1000000, TPS65218_REG_SEQ5, 331 TPS65218_SEQ5_DC5_SEQ_MASK), 332 TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, REGULATOR_VOLTAGE, 333 tps65218_dcdc56_pmic_ops, 1, -1, -1, 334 TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, 0, 335 NULL, 0, 0, 1800000, TPS65218_REG_SEQ5, 336 TPS65218_SEQ5_DC6_SEQ_MASK), 337 TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, REGULATOR_VOLTAGE, 338 tps65218_ldo1_dcdc34_ops, 64, 339 TPS65218_REG_CONTROL_LDO1, 340 TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, 341 TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges, 342 2, 0, 0, TPS65218_REG_SEQ6, 343 TPS65218_SEQ6_LDO1_SEQ_MASK), 344 TPS65218_REGULATOR("LS3", TPS65218_LS_3, REGULATOR_CURRENT, 345 tps65218_ls3_ops, 0, 0, 0, TPS65218_REG_ENABLE2, 346 TPS65218_ENABLE2_LS3_EN, TPS65218_REG_CONFIG2, 347 TPS65218_CONFIG2_LS3ILIM_MASK, NULL, 0, 0, 0, 0, 0), 348 }; 349 350 static int tps65218_regulator_probe(struct platform_device *pdev) 351 { 352 struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); 353 struct regulator_init_data *init_data; 354 const struct tps_info *template; 355 struct regulator_dev *rdev; 356 const struct of_device_id *match; 357 struct regulator_config config = { }; 358 int id, ret; 359 unsigned int val; 360 361 match = of_match_device(tps65218_of_match, &pdev->dev); 362 if (!match) 363 return -ENODEV; 364 365 template = match->data; 366 id = template->id; 367 init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node, 368 ®ulators[id]); 369 370 platform_set_drvdata(pdev, tps); 371 372 tps->info[id] = &tps65218_pmic_regs[id]; 373 config.dev = &pdev->dev; 374 config.init_data = init_data; 375 config.driver_data = tps; 376 config.regmap = tps->regmap; 377 config.of_node = pdev->dev.of_node; 378 379 rdev = devm_regulator_register(&pdev->dev, ®ulators[id], &config); 380 if (IS_ERR(rdev)) { 381 dev_err(tps->dev, "failed to register %s regulator\n", 382 pdev->name); 383 return PTR_ERR(rdev); 384 } 385 386 ret = tps65218_reg_read(tps, regulators[id].bypass_reg, &val); 387 if (ret) 388 return ret; 389 390 tps->info[id]->strobe = val & regulators[id].bypass_mask; 391 392 return 0; 393 } 394 395 static struct platform_driver tps65218_regulator_driver = { 396 .driver = { 397 .name = "tps65218-pmic", 398 .of_match_table = tps65218_of_match, 399 }, 400 .probe = tps65218_regulator_probe, 401 }; 402 403 module_platform_driver(tps65218_regulator_driver); 404 405 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 406 MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); 407 MODULE_ALIAS("platform:tps65218-pmic"); 408 MODULE_LICENSE("GPL v2"); 409