tps65218-regulator.c (12138B)
1/* 2 * tps65218-regulator.c 3 * 4 * Regulator driver for TPS65218 PMIC 5 * 6 * Copyright (C) 2014 Texas Instruments Incorporated - https://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/regmap.h> 26#include <linux/regulator/of_regulator.h> 27#include <linux/regulator/driver.h> 28#include <linux/regulator/machine.h> 29#include <linux/mfd/tps65218.h> 30 31#define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \ 32 _em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm, \ 33 _ct, _ncl) \ 34 { \ 35 .name = _name, \ 36 .of_match = _of, \ 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 .curr_table = _ct, \ 47 .n_current_limits = _ncl, \ 48 .enable_reg = _er, \ 49 .enable_mask = _em, \ 50 .volt_table = NULL, \ 51 .linear_ranges = _lr, \ 52 .n_linear_ranges = _nlr, \ 53 .ramp_delay = _delay, \ 54 .fixed_uV = _fuv, \ 55 .bypass_reg = _sr, \ 56 .bypass_mask = _sm, \ 57 } \ 58 59static const struct linear_range dcdc1_dcdc2_ranges[] = { 60 REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), 61 REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), 62}; 63 64static const struct linear_range ldo1_dcdc3_ranges[] = { 65 REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), 66 REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), 67}; 68 69static const struct linear_range dcdc4_ranges[] = { 70 REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), 71 REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000), 72}; 73 74static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, 75 unsigned selector) 76{ 77 int ret; 78 struct tps65218 *tps = rdev_get_drvdata(dev); 79 unsigned int rid = rdev_get_id(dev); 80 81 /* Set the voltage based on vsel value and write protect level is 2 */ 82 ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, 83 selector, TPS65218_PROTECT_L1); 84 85 /* Set GO bit for DCDC1/2 to initiate voltage transistion */ 86 switch (rid) { 87 case TPS65218_DCDC_1: 88 case TPS65218_DCDC_2: 89 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, 90 TPS65218_SLEW_RATE_GO, 91 TPS65218_SLEW_RATE_GO, 92 TPS65218_PROTECT_L1); 93 break; 94 } 95 96 return ret; 97} 98 99static int tps65218_pmic_enable(struct regulator_dev *dev) 100{ 101 struct tps65218 *tps = rdev_get_drvdata(dev); 102 int rid = rdev_get_id(dev); 103 104 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 105 return -EINVAL; 106 107 /* Enable the regulator and password protection is level 1 */ 108 return tps65218_set_bits(tps, dev->desc->enable_reg, 109 dev->desc->enable_mask, dev->desc->enable_mask, 110 TPS65218_PROTECT_L1); 111} 112 113static int tps65218_pmic_disable(struct regulator_dev *dev) 114{ 115 struct tps65218 *tps = rdev_get_drvdata(dev); 116 int rid = rdev_get_id(dev); 117 118 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 119 return -EINVAL; 120 121 /* Disable the regulator and password protection is level 1 */ 122 return tps65218_clear_bits(tps, dev->desc->enable_reg, 123 dev->desc->enable_mask, TPS65218_PROTECT_L1); 124} 125 126static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev) 127{ 128 struct tps65218 *tps = rdev_get_drvdata(dev); 129 unsigned int rid = rdev_get_id(dev); 130 131 if (rid > TPS65218_LDO_1) 132 return -EINVAL; 133 134 return tps65218_clear_bits(tps, dev->desc->bypass_reg, 135 dev->desc->bypass_mask, 136 TPS65218_PROTECT_L1); 137} 138 139static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev) 140{ 141 struct tps65218 *tps = rdev_get_drvdata(dev); 142 unsigned int rid = rdev_get_id(dev); 143 144 if (rid > TPS65218_LDO_1) 145 return -EINVAL; 146 147 /* 148 * Certain revisions of TPS65218 will need to have DCDC3 regulator 149 * enabled always, otherwise an immediate system reboot will occur 150 * during poweroff. 151 */ 152 if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1) 153 return 0; 154 155 if (!tps->strobes[rid]) { 156 if (rid == TPS65218_DCDC_3) 157 tps->strobes[rid] = 3; 158 else 159 return -EINVAL; 160 } 161 162 return tps65218_set_bits(tps, dev->desc->bypass_reg, 163 dev->desc->bypass_mask, 164 tps->strobes[rid], TPS65218_PROTECT_L1); 165} 166 167/* Operations permitted on DCDC1, DCDC2 */ 168static const struct regulator_ops tps65218_dcdc12_ops = { 169 .is_enabled = regulator_is_enabled_regmap, 170 .enable = tps65218_pmic_enable, 171 .disable = tps65218_pmic_disable, 172 .get_voltage_sel = regulator_get_voltage_sel_regmap, 173 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 174 .list_voltage = regulator_list_voltage_linear_range, 175 .map_voltage = regulator_map_voltage_linear_range, 176 .set_voltage_time_sel = regulator_set_voltage_time_sel, 177 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 178 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 179}; 180 181/* Operations permitted on DCDC3, DCDC4 and LDO1 */ 182static const struct regulator_ops tps65218_ldo1_dcdc34_ops = { 183 .is_enabled = regulator_is_enabled_regmap, 184 .enable = tps65218_pmic_enable, 185 .disable = tps65218_pmic_disable, 186 .get_voltage_sel = regulator_get_voltage_sel_regmap, 187 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 188 .list_voltage = regulator_list_voltage_linear_range, 189 .map_voltage = regulator_map_voltage_linear_range, 190 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 191 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 192}; 193 194static const unsigned int ls3_currents[] = { 100000, 200000, 500000, 1000000 }; 195 196static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev, 197 int lim_uA) 198{ 199 unsigned int index = 0; 200 unsigned int num_currents = ARRAY_SIZE(ls3_currents); 201 struct tps65218 *tps = rdev_get_drvdata(dev); 202 203 while (index < num_currents && ls3_currents[index] != lim_uA) 204 index++; 205 206 if (index == num_currents) 207 return -EINVAL; 208 209 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, 210 index << __builtin_ctz(dev->desc->csel_mask), 211 TPS65218_PROTECT_L1); 212} 213 214static int tps65218_pmic_set_current_limit(struct regulator_dev *dev, 215 int min_uA, int max_uA) 216{ 217 int index = 0; 218 unsigned int num_currents = ARRAY_SIZE(ls3_currents); 219 struct tps65218 *tps = rdev_get_drvdata(dev); 220 221 while (index < num_currents && ls3_currents[index] <= max_uA) 222 index++; 223 224 index--; 225 226 if (index < 0 || ls3_currents[index] < min_uA) 227 return -EINVAL; 228 229 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, 230 index << __builtin_ctz(dev->desc->csel_mask), 231 TPS65218_PROTECT_L1); 232} 233 234static const struct regulator_ops tps65218_ls23_ops = { 235 .is_enabled = regulator_is_enabled_regmap, 236 .enable = tps65218_pmic_enable, 237 .disable = tps65218_pmic_disable, 238 .set_input_current_limit = tps65218_pmic_set_input_current_lim, 239 .set_current_limit = tps65218_pmic_set_current_limit, 240 .get_current_limit = regulator_get_current_limit_regmap, 241}; 242 243/* Operations permitted on DCDC5, DCDC6 */ 244static const struct regulator_ops tps65218_dcdc56_pmic_ops = { 245 .is_enabled = regulator_is_enabled_regmap, 246 .enable = tps65218_pmic_enable, 247 .disable = tps65218_pmic_disable, 248 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 249 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 250}; 251 252static const struct regulator_desc regulators[] = { 253 TPS65218_REGULATOR("DCDC1", "regulator-dcdc1", TPS65218_DCDC_1, 254 REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, 255 TPS65218_REG_CONTROL_DCDC1, 256 TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1, 257 TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges, 258 2, 4000, 0, TPS65218_REG_SEQ3, 259 TPS65218_SEQ3_DC1_SEQ_MASK, NULL, 0), 260 TPS65218_REGULATOR("DCDC2", "regulator-dcdc2", TPS65218_DCDC_2, 261 REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, 262 TPS65218_REG_CONTROL_DCDC2, 263 TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1, 264 TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges, 265 2, 4000, 0, TPS65218_REG_SEQ3, 266 TPS65218_SEQ3_DC2_SEQ_MASK, NULL, 0), 267 TPS65218_REGULATOR("DCDC3", "regulator-dcdc3", TPS65218_DCDC_3, 268 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, 269 TPS65218_REG_CONTROL_DCDC3, 270 TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, 271 TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2, 272 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK, 273 NULL, 0), 274 TPS65218_REGULATOR("DCDC4", "regulator-dcdc4", TPS65218_DCDC_4, 275 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53, 276 TPS65218_REG_CONTROL_DCDC4, 277 TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1, 278 TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2, 279 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK, 280 NULL, 0), 281 TPS65218_REGULATOR("DCDC5", "regulator-dcdc5", TPS65218_DCDC_5, 282 REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, 283 -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, 284 0, NULL, 0, 0, 1000000, TPS65218_REG_SEQ5, 285 TPS65218_SEQ5_DC5_SEQ_MASK, NULL, 0), 286 TPS65218_REGULATOR("DCDC6", "regulator-dcdc6", TPS65218_DCDC_6, 287 REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, 288 -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, 289 0, NULL, 0, 0, 1800000, TPS65218_REG_SEQ5, 290 TPS65218_SEQ5_DC6_SEQ_MASK, NULL, 0), 291 TPS65218_REGULATOR("LDO1", "regulator-ldo1", TPS65218_LDO_1, 292 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, 293 TPS65218_REG_CONTROL_LDO1, 294 TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, 295 TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges, 296 2, 0, 0, TPS65218_REG_SEQ6, 297 TPS65218_SEQ6_LDO1_SEQ_MASK, NULL, 0), 298 TPS65218_REGULATOR("LS2", "regulator-ls2", TPS65218_LS_2, 299 REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0, 300 TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS2_EN, 301 TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS2ILIM_MASK, 302 NULL, 0, 0, 0, 0, 0, ls3_currents, 303 ARRAY_SIZE(ls3_currents)), 304 TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3, 305 REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0, 306 TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN, 307 TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK, 308 NULL, 0, 0, 0, 0, 0, ls3_currents, 309 ARRAY_SIZE(ls3_currents)), 310}; 311 312static int tps65218_regulator_probe(struct platform_device *pdev) 313{ 314 struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); 315 struct regulator_dev *rdev; 316 struct regulator_config config = { }; 317 int i, ret; 318 unsigned int val; 319 320 config.dev = &pdev->dev; 321 config.dev->of_node = tps->dev->of_node; 322 config.driver_data = tps; 323 config.regmap = tps->regmap; 324 325 /* Allocate memory for strobes */ 326 tps->strobes = devm_kcalloc(&pdev->dev, 327 TPS65218_NUM_REGULATOR, sizeof(u8), 328 GFP_KERNEL); 329 if (!tps->strobes) 330 return -ENOMEM; 331 332 for (i = 0; i < ARRAY_SIZE(regulators); i++) { 333 rdev = devm_regulator_register(&pdev->dev, ®ulators[i], 334 &config); 335 if (IS_ERR(rdev)) { 336 dev_err(tps->dev, "failed to register %s regulator\n", 337 pdev->name); 338 return PTR_ERR(rdev); 339 } 340 341 ret = regmap_read(tps->regmap, regulators[i].bypass_reg, &val); 342 if (ret) 343 return ret; 344 345 tps->strobes[i] = val & regulators[i].bypass_mask; 346 } 347 348 return 0; 349} 350 351static const struct platform_device_id tps65218_regulator_id_table[] = { 352 { "tps65218-regulator", }, 353 { /* sentinel */ } 354}; 355MODULE_DEVICE_TABLE(platform, tps65218_regulator_id_table); 356 357static struct platform_driver tps65218_regulator_driver = { 358 .driver = { 359 .name = "tps65218-pmic", 360 }, 361 .probe = tps65218_regulator_probe, 362 .id_table = tps65218_regulator_id_table, 363}; 364 365module_platform_driver(tps65218_regulator_driver); 366 367MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 368MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); 369MODULE_ALIAS("platform:tps65218-pmic"); 370MODULE_LICENSE("GPL v2");