1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * tps65218-regulator.c 4 * 5 * Regulator driver for TPS65218 PMIC 6 * 7 * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/ 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/device.h> 13 #include <linux/init.h> 14 #include <linux/err.h> 15 #include <linux/platform_device.h> 16 #include <linux/of_device.h> 17 #include <linux/regmap.h> 18 #include <linux/regulator/of_regulator.h> 19 #include <linux/regulator/driver.h> 20 #include <linux/regulator/machine.h> 21 #include <linux/mfd/tps65218.h> 22 23 #define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \ 24 _em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm, \ 25 _ct, _ncl) \ 26 { \ 27 .name = _name, \ 28 .of_match = _of, \ 29 .id = _id, \ 30 .ops = &_ops, \ 31 .n_voltages = _n, \ 32 .type = _type, \ 33 .owner = THIS_MODULE, \ 34 .vsel_reg = _vr, \ 35 .vsel_mask = _vm, \ 36 .csel_reg = _cr, \ 37 .csel_mask = _cm, \ 38 .curr_table = _ct, \ 39 .n_current_limits = _ncl, \ 40 .enable_reg = _er, \ 41 .enable_mask = _em, \ 42 .volt_table = NULL, \ 43 .linear_ranges = _lr, \ 44 .n_linear_ranges = _nlr, \ 45 .ramp_delay = _delay, \ 46 .fixed_uV = _fuv, \ 47 .bypass_reg = _sr, \ 48 .bypass_mask = _sm, \ 49 } \ 50 51 static const struct linear_range dcdc1_dcdc2_ranges[] = { 52 REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), 53 REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), 54 }; 55 56 static const struct linear_range ldo1_dcdc3_ranges[] = { 57 REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), 58 REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), 59 }; 60 61 static const struct linear_range dcdc4_ranges[] = { 62 REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), 63 REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000), 64 }; 65 66 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, 67 unsigned selector) 68 { 69 int ret; 70 struct tps65218 *tps = rdev_get_drvdata(dev); 71 unsigned int rid = rdev_get_id(dev); 72 73 /* Set the voltage based on vsel value and write protect level is 2 */ 74 ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, 75 selector, TPS65218_PROTECT_L1); 76 77 /* Set GO bit for DCDC1/2 to initiate voltage transistion */ 78 switch (rid) { 79 case TPS65218_DCDC_1: 80 case TPS65218_DCDC_2: 81 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, 82 TPS65218_SLEW_RATE_GO, 83 TPS65218_SLEW_RATE_GO, 84 TPS65218_PROTECT_L1); 85 break; 86 } 87 88 return ret; 89 } 90 91 static int tps65218_pmic_enable(struct regulator_dev *dev) 92 { 93 struct tps65218 *tps = rdev_get_drvdata(dev); 94 int rid = rdev_get_id(dev); 95 96 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 97 return -EINVAL; 98 99 /* Enable the regulator and password protection is level 1 */ 100 return tps65218_set_bits(tps, dev->desc->enable_reg, 101 dev->desc->enable_mask, dev->desc->enable_mask, 102 TPS65218_PROTECT_L1); 103 } 104 105 static int tps65218_pmic_disable(struct regulator_dev *dev) 106 { 107 struct tps65218 *tps = rdev_get_drvdata(dev); 108 int rid = rdev_get_id(dev); 109 110 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 111 return -EINVAL; 112 113 /* Disable the regulator and password protection is level 1 */ 114 return tps65218_clear_bits(tps, dev->desc->enable_reg, 115 dev->desc->enable_mask, TPS65218_PROTECT_L1); 116 } 117 118 static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev) 119 { 120 struct tps65218 *tps = rdev_get_drvdata(dev); 121 unsigned int rid = rdev_get_id(dev); 122 123 if (rid > TPS65218_LDO_1) 124 return -EINVAL; 125 126 return tps65218_clear_bits(tps, dev->desc->bypass_reg, 127 dev->desc->bypass_mask, 128 TPS65218_PROTECT_L1); 129 } 130 131 static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev) 132 { 133 struct tps65218 *tps = rdev_get_drvdata(dev); 134 unsigned int rid = rdev_get_id(dev); 135 136 if (rid > TPS65218_LDO_1) 137 return -EINVAL; 138 139 /* 140 * Certain revisions of TPS65218 will need to have DCDC3 regulator 141 * enabled always, otherwise an immediate system reboot will occur 142 * during poweroff. 143 */ 144 if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1) 145 return 0; 146 147 if (!tps->strobes[rid]) { 148 if (rid == TPS65218_DCDC_3) 149 tps->strobes[rid] = 3; 150 else 151 return -EINVAL; 152 } 153 154 return tps65218_set_bits(tps, dev->desc->bypass_reg, 155 dev->desc->bypass_mask, 156 tps->strobes[rid], TPS65218_PROTECT_L1); 157 } 158 159 /* Operations permitted on DCDC1, DCDC2 */ 160 static const struct regulator_ops tps65218_dcdc12_ops = { 161 .is_enabled = regulator_is_enabled_regmap, 162 .enable = tps65218_pmic_enable, 163 .disable = tps65218_pmic_disable, 164 .get_voltage_sel = regulator_get_voltage_sel_regmap, 165 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 166 .list_voltage = regulator_list_voltage_linear_range, 167 .map_voltage = regulator_map_voltage_linear_range, 168 .set_voltage_time_sel = regulator_set_voltage_time_sel, 169 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 170 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 171 }; 172 173 /* Operations permitted on DCDC3, DCDC4 and LDO1 */ 174 static const struct regulator_ops tps65218_ldo1_dcdc34_ops = { 175 .is_enabled = regulator_is_enabled_regmap, 176 .enable = tps65218_pmic_enable, 177 .disable = tps65218_pmic_disable, 178 .get_voltage_sel = regulator_get_voltage_sel_regmap, 179 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 180 .list_voltage = regulator_list_voltage_linear_range, 181 .map_voltage = regulator_map_voltage_linear_range, 182 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 183 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 184 }; 185 186 static const unsigned int ls3_currents[] = { 100000, 200000, 500000, 1000000 }; 187 188 static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev, 189 int lim_uA) 190 { 191 unsigned int index = 0; 192 unsigned int num_currents = ARRAY_SIZE(ls3_currents); 193 struct tps65218 *tps = rdev_get_drvdata(dev); 194 195 while (index < num_currents && ls3_currents[index] != lim_uA) 196 index++; 197 198 if (index == num_currents) 199 return -EINVAL; 200 201 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, 202 index << __builtin_ctz(dev->desc->csel_mask), 203 TPS65218_PROTECT_L1); 204 } 205 206 static int tps65218_pmic_set_current_limit(struct regulator_dev *dev, 207 int min_uA, int max_uA) 208 { 209 int index = 0; 210 unsigned int num_currents = ARRAY_SIZE(ls3_currents); 211 struct tps65218 *tps = rdev_get_drvdata(dev); 212 213 while (index < num_currents && ls3_currents[index] <= max_uA) 214 index++; 215 216 index--; 217 218 if (index < 0 || ls3_currents[index] < min_uA) 219 return -EINVAL; 220 221 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, 222 index << __builtin_ctz(dev->desc->csel_mask), 223 TPS65218_PROTECT_L1); 224 } 225 226 static const struct regulator_ops tps65218_ls23_ops = { 227 .is_enabled = regulator_is_enabled_regmap, 228 .enable = tps65218_pmic_enable, 229 .disable = tps65218_pmic_disable, 230 .set_input_current_limit = tps65218_pmic_set_input_current_lim, 231 .set_current_limit = tps65218_pmic_set_current_limit, 232 .get_current_limit = regulator_get_current_limit_regmap, 233 }; 234 235 /* Operations permitted on DCDC5, DCDC6 */ 236 static const struct regulator_ops tps65218_dcdc56_pmic_ops = { 237 .is_enabled = regulator_is_enabled_regmap, 238 .enable = tps65218_pmic_enable, 239 .disable = tps65218_pmic_disable, 240 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 241 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 242 }; 243 244 static const struct regulator_desc regulators[] = { 245 TPS65218_REGULATOR("DCDC1", "regulator-dcdc1", TPS65218_DCDC_1, 246 REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, 247 TPS65218_REG_CONTROL_DCDC1, 248 TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1, 249 TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges, 250 2, 4000, 0, TPS65218_REG_SEQ3, 251 TPS65218_SEQ3_DC1_SEQ_MASK, NULL, 0), 252 TPS65218_REGULATOR("DCDC2", "regulator-dcdc2", TPS65218_DCDC_2, 253 REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, 254 TPS65218_REG_CONTROL_DCDC2, 255 TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1, 256 TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges, 257 2, 4000, 0, TPS65218_REG_SEQ3, 258 TPS65218_SEQ3_DC2_SEQ_MASK, NULL, 0), 259 TPS65218_REGULATOR("DCDC3", "regulator-dcdc3", TPS65218_DCDC_3, 260 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, 261 TPS65218_REG_CONTROL_DCDC3, 262 TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, 263 TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2, 264 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK, 265 NULL, 0), 266 TPS65218_REGULATOR("DCDC4", "regulator-dcdc4", TPS65218_DCDC_4, 267 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53, 268 TPS65218_REG_CONTROL_DCDC4, 269 TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1, 270 TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2, 271 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK, 272 NULL, 0), 273 TPS65218_REGULATOR("DCDC5", "regulator-dcdc5", TPS65218_DCDC_5, 274 REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, 275 -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, 276 0, NULL, 0, 0, 1000000, TPS65218_REG_SEQ5, 277 TPS65218_SEQ5_DC5_SEQ_MASK, NULL, 0), 278 TPS65218_REGULATOR("DCDC6", "regulator-dcdc6", TPS65218_DCDC_6, 279 REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, 280 -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, 281 0, NULL, 0, 0, 1800000, TPS65218_REG_SEQ5, 282 TPS65218_SEQ5_DC6_SEQ_MASK, NULL, 0), 283 TPS65218_REGULATOR("LDO1", "regulator-ldo1", TPS65218_LDO_1, 284 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, 285 TPS65218_REG_CONTROL_LDO1, 286 TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, 287 TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges, 288 2, 0, 0, TPS65218_REG_SEQ6, 289 TPS65218_SEQ6_LDO1_SEQ_MASK, NULL, 0), 290 TPS65218_REGULATOR("LS2", "regulator-ls2", TPS65218_LS_2, 291 REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0, 292 TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS2_EN, 293 TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS2ILIM_MASK, 294 NULL, 0, 0, 0, 0, 0, ls3_currents, 295 ARRAY_SIZE(ls3_currents)), 296 TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3, 297 REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0, 298 TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN, 299 TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK, 300 NULL, 0, 0, 0, 0, 0, ls3_currents, 301 ARRAY_SIZE(ls3_currents)), 302 }; 303 304 static int tps65218_regulator_probe(struct platform_device *pdev) 305 { 306 struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); 307 struct regulator_dev *rdev; 308 struct regulator_config config = { }; 309 int i, ret; 310 unsigned int val; 311 312 config.dev = &pdev->dev; 313 config.dev->of_node = tps->dev->of_node; 314 config.driver_data = tps; 315 config.regmap = tps->regmap; 316 317 /* Allocate memory for strobes */ 318 tps->strobes = devm_kcalloc(&pdev->dev, 319 TPS65218_NUM_REGULATOR, sizeof(u8), 320 GFP_KERNEL); 321 if (!tps->strobes) 322 return -ENOMEM; 323 324 for (i = 0; i < ARRAY_SIZE(regulators); i++) { 325 rdev = devm_regulator_register(&pdev->dev, ®ulators[i], 326 &config); 327 if (IS_ERR(rdev)) { 328 dev_err(tps->dev, "failed to register %s regulator\n", 329 pdev->name); 330 return PTR_ERR(rdev); 331 } 332 333 ret = regmap_read(tps->regmap, regulators[i].bypass_reg, &val); 334 if (ret) 335 return ret; 336 337 tps->strobes[i] = val & regulators[i].bypass_mask; 338 } 339 340 return 0; 341 } 342 343 static const struct platform_device_id tps65218_regulator_id_table[] = { 344 { "tps65218-regulator", }, 345 { /* sentinel */ } 346 }; 347 MODULE_DEVICE_TABLE(platform, tps65218_regulator_id_table); 348 349 static struct platform_driver tps65218_regulator_driver = { 350 .driver = { 351 .name = "tps65218-pmic", 352 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 353 }, 354 .probe = tps65218_regulator_probe, 355 .id_table = tps65218_regulator_id_table, 356 }; 357 358 module_platform_driver(tps65218_regulator_driver); 359 360 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 361 MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); 362 MODULE_ALIAS("platform:tps65218-pmic"); 363 MODULE_LICENSE("GPL v2"); 364