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 if (!tps->info[rid]->strobe) { 184 if (rid == TPS65218_DCDC_3) 185 tps->info[rid]->strobe = 3; 186 else 187 return -EINVAL; 188 } 189 190 return tps65218_set_bits(tps, dev->desc->bypass_reg, 191 dev->desc->bypass_mask, 192 tps->info[rid]->strobe, 193 TPS65218_PROTECT_L1); 194 } 195 196 /* Operations permitted on DCDC1, DCDC2 */ 197 static struct regulator_ops tps65218_dcdc12_ops = { 198 .is_enabled = regulator_is_enabled_regmap, 199 .enable = tps65218_pmic_enable, 200 .disable = tps65218_pmic_disable, 201 .get_voltage_sel = regulator_get_voltage_sel_regmap, 202 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 203 .list_voltage = regulator_list_voltage_linear_range, 204 .map_voltage = regulator_map_voltage_linear_range, 205 .set_voltage_time_sel = regulator_set_voltage_time_sel, 206 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 207 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 208 }; 209 210 /* Operations permitted on DCDC3, DCDC4 and LDO1 */ 211 static struct regulator_ops tps65218_ldo1_dcdc34_ops = { 212 .is_enabled = regulator_is_enabled_regmap, 213 .enable = tps65218_pmic_enable, 214 .disable = tps65218_pmic_disable, 215 .get_voltage_sel = regulator_get_voltage_sel_regmap, 216 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 217 .list_voltage = regulator_list_voltage_linear_range, 218 .map_voltage = regulator_map_voltage_linear_range, 219 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 220 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 221 }; 222 223 static const int ls3_currents[] = { 100, 200, 500, 1000 }; 224 225 static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev, 226 int lim_uA) 227 { 228 unsigned int index = 0; 229 unsigned int num_currents = ARRAY_SIZE(ls3_currents); 230 struct tps65218 *tps = rdev_get_drvdata(dev); 231 232 while (index < num_currents && ls3_currents[index] != lim_uA) 233 index++; 234 235 if (index == num_currents) 236 return -EINVAL; 237 238 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, 239 index << 2, TPS65218_PROTECT_L1); 240 } 241 242 static int tps65218_pmic_set_current_limit(struct regulator_dev *dev, 243 int min_uA, int max_uA) 244 { 245 int index = 0; 246 unsigned int num_currents = ARRAY_SIZE(ls3_currents); 247 struct tps65218 *tps = rdev_get_drvdata(dev); 248 249 while (index < num_currents && ls3_currents[index] < max_uA) 250 index++; 251 252 index--; 253 254 if (index < 0 || ls3_currents[index] < min_uA) 255 return -EINVAL; 256 257 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, 258 index << 2, TPS65218_PROTECT_L1); 259 } 260 261 static int tps65218_pmic_get_current_limit(struct regulator_dev *dev) 262 { 263 int retval; 264 unsigned int index; 265 struct tps65218 *tps = rdev_get_drvdata(dev); 266 267 retval = tps65218_reg_read(tps, dev->desc->csel_reg, &index); 268 if (retval < 0) 269 return retval; 270 271 index = (index & dev->desc->csel_mask) >> 2; 272 273 return ls3_currents[index]; 274 } 275 276 static struct regulator_ops tps65218_ls3_ops = { 277 .is_enabled = regulator_is_enabled_regmap, 278 .enable = tps65218_pmic_enable, 279 .disable = tps65218_pmic_disable, 280 .set_input_current_limit = tps65218_pmic_set_input_current_lim, 281 .set_current_limit = tps65218_pmic_set_current_limit, 282 .get_current_limit = tps65218_pmic_get_current_limit, 283 }; 284 285 /* Operations permitted on DCDC5, DCDC6 */ 286 static struct regulator_ops tps65218_dcdc56_pmic_ops = { 287 .is_enabled = regulator_is_enabled_regmap, 288 .enable = tps65218_pmic_enable, 289 .disable = tps65218_pmic_disable, 290 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 291 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 292 }; 293 294 static const struct regulator_desc regulators[] = { 295 TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, REGULATOR_VOLTAGE, 296 tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC1, 297 TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1, 298 TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges, 299 2, 4000, 0, TPS65218_REG_SEQ3, 300 TPS65218_SEQ3_DC1_SEQ_MASK), 301 TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, REGULATOR_VOLTAGE, 302 tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC2, 303 TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1, 304 TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges, 305 2, 4000, 0, TPS65218_REG_SEQ3, 306 TPS65218_SEQ3_DC2_SEQ_MASK), 307 TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, REGULATOR_VOLTAGE, 308 tps65218_ldo1_dcdc34_ops, 64, 309 TPS65218_REG_CONTROL_DCDC3, 310 TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, 311 TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2, 312 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK), 313 TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, REGULATOR_VOLTAGE, 314 tps65218_ldo1_dcdc34_ops, 53, 315 TPS65218_REG_CONTROL_DCDC4, 316 TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1, 317 TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2, 318 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK), 319 TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, REGULATOR_VOLTAGE, 320 tps65218_dcdc56_pmic_ops, 1, -1, -1, 321 TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, 0, 322 NULL, 0, 0, 1000000, TPS65218_REG_SEQ5, 323 TPS65218_SEQ5_DC5_SEQ_MASK), 324 TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, REGULATOR_VOLTAGE, 325 tps65218_dcdc56_pmic_ops, 1, -1, -1, 326 TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, 0, 327 NULL, 0, 0, 1800000, TPS65218_REG_SEQ5, 328 TPS65218_SEQ5_DC6_SEQ_MASK), 329 TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, REGULATOR_VOLTAGE, 330 tps65218_ldo1_dcdc34_ops, 64, 331 TPS65218_REG_CONTROL_LDO1, 332 TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, 333 TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges, 334 2, 0, 0, TPS65218_REG_SEQ6, 335 TPS65218_SEQ6_LDO1_SEQ_MASK), 336 TPS65218_REGULATOR("LS3", TPS65218_LS_3, REGULATOR_CURRENT, 337 tps65218_ls3_ops, 0, 0, 0, TPS65218_REG_ENABLE2, 338 TPS65218_ENABLE2_LS3_EN, TPS65218_REG_CONFIG2, 339 TPS65218_CONFIG2_LS3ILIM_MASK, NULL, 0, 0, 0, 0, 0), 340 }; 341 342 static int tps65218_regulator_probe(struct platform_device *pdev) 343 { 344 struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); 345 struct regulator_init_data *init_data; 346 const struct tps_info *template; 347 struct regulator_dev *rdev; 348 const struct of_device_id *match; 349 struct regulator_config config = { }; 350 int id, ret; 351 unsigned int val; 352 353 match = of_match_device(tps65218_of_match, &pdev->dev); 354 if (!match) 355 return -ENODEV; 356 357 template = match->data; 358 id = template->id; 359 init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node, 360 ®ulators[id]); 361 362 platform_set_drvdata(pdev, tps); 363 364 tps->info[id] = &tps65218_pmic_regs[id]; 365 config.dev = &pdev->dev; 366 config.init_data = init_data; 367 config.driver_data = tps; 368 config.regmap = tps->regmap; 369 config.of_node = pdev->dev.of_node; 370 371 rdev = devm_regulator_register(&pdev->dev, ®ulators[id], &config); 372 if (IS_ERR(rdev)) { 373 dev_err(tps->dev, "failed to register %s regulator\n", 374 pdev->name); 375 return PTR_ERR(rdev); 376 } 377 378 ret = tps65218_reg_read(tps, regulators[id].bypass_reg, &val); 379 if (ret) 380 return ret; 381 382 tps->info[id]->strobe = val & regulators[id].bypass_mask; 383 384 return 0; 385 } 386 387 static struct platform_driver tps65218_regulator_driver = { 388 .driver = { 389 .name = "tps65218-pmic", 390 .of_match_table = tps65218_of_match, 391 }, 392 .probe = tps65218_regulator_probe, 393 }; 394 395 module_platform_driver(tps65218_regulator_driver); 396 397 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 398 MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); 399 MODULE_ALIAS("platform:tps65218-pmic"); 400 MODULE_LICENSE("GPL v2"); 401