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/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 enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4, 32 DCDC5, DCDC6, LDO1, LS3 }; 33 34 #define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \ 35 _em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm) \ 36 { \ 37 .name = _name, \ 38 .of_match = _of, \ 39 .id = _id, \ 40 .ops = &_ops, \ 41 .n_voltages = _n, \ 42 .type = _type, \ 43 .owner = THIS_MODULE, \ 44 .vsel_reg = _vr, \ 45 .vsel_mask = _vm, \ 46 .csel_reg = _cr, \ 47 .csel_mask = _cm, \ 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 59 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = { 60 REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), 61 REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), 62 }; 63 64 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = { 65 REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), 66 REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), 67 }; 68 69 static const struct regulator_linear_range dcdc4_ranges[] = { 70 REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), 71 REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000), 72 }; 73 74 static 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 99 static 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 } 112 113 static 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 } 125 126 static 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_DCDC_1 || 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 } 138 139 static 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_DCDC_1 || 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->info[rid]->strobe = 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 */ 168 static 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 */ 182 static 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 }; 193 194 static const int ls3_currents[] = { 100, 200, 500, 1000 }; 195 196 static 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 << 2, TPS65218_PROTECT_L1); 211 } 212 213 static int tps65218_pmic_set_current_limit(struct regulator_dev *dev, 214 int min_uA, int max_uA) 215 { 216 int index = 0; 217 unsigned int num_currents = ARRAY_SIZE(ls3_currents); 218 struct tps65218 *tps = rdev_get_drvdata(dev); 219 220 while (index < num_currents && ls3_currents[index] < max_uA) 221 index++; 222 223 index--; 224 225 if (index < 0 || ls3_currents[index] < min_uA) 226 return -EINVAL; 227 228 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, 229 index << 2, TPS65218_PROTECT_L1); 230 } 231 232 static int tps65218_pmic_get_current_limit(struct regulator_dev *dev) 233 { 234 int retval; 235 unsigned int index; 236 struct tps65218 *tps = rdev_get_drvdata(dev); 237 238 retval = regmap_read(tps->regmap, dev->desc->csel_reg, &index); 239 if (retval < 0) 240 return retval; 241 242 index = (index & dev->desc->csel_mask) >> 2; 243 244 return ls3_currents[index]; 245 } 246 247 static struct regulator_ops tps65218_ls3_ops = { 248 .is_enabled = regulator_is_enabled_regmap, 249 .enable = tps65218_pmic_enable, 250 .disable = tps65218_pmic_disable, 251 .set_input_current_limit = tps65218_pmic_set_input_current_lim, 252 .set_current_limit = tps65218_pmic_set_current_limit, 253 .get_current_limit = tps65218_pmic_get_current_limit, 254 }; 255 256 /* Operations permitted on DCDC5, DCDC6 */ 257 static struct regulator_ops tps65218_dcdc56_pmic_ops = { 258 .is_enabled = regulator_is_enabled_regmap, 259 .enable = tps65218_pmic_enable, 260 .disable = tps65218_pmic_disable, 261 .set_suspend_enable = tps65218_pmic_set_suspend_enable, 262 .set_suspend_disable = tps65218_pmic_set_suspend_disable, 263 }; 264 265 static const struct regulator_desc regulators[] = { 266 TPS65218_REGULATOR("DCDC1", "regulator-dcdc1", TPS65218_DCDC_1, 267 REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, 268 TPS65218_REG_CONTROL_DCDC1, 269 TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1, 270 TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges, 271 2, 4000, 0, TPS65218_REG_SEQ3, 272 TPS65218_SEQ3_DC1_SEQ_MASK), 273 TPS65218_REGULATOR("DCDC2", "regulator-dcdc2", TPS65218_DCDC_2, 274 REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, 275 TPS65218_REG_CONTROL_DCDC2, 276 TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1, 277 TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges, 278 2, 4000, 0, TPS65218_REG_SEQ3, 279 TPS65218_SEQ3_DC2_SEQ_MASK), 280 TPS65218_REGULATOR("DCDC3", "regulator-dcdc3", TPS65218_DCDC_3, 281 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, 282 TPS65218_REG_CONTROL_DCDC3, 283 TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, 284 TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2, 285 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK), 286 TPS65218_REGULATOR("DCDC4", "regulator-dcdc4", TPS65218_DCDC_4, 287 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53, 288 TPS65218_REG_CONTROL_DCDC4, 289 TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1, 290 TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2, 291 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK), 292 TPS65218_REGULATOR("DCDC5", "regulator-dcdc5", TPS65218_DCDC_5, 293 REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, 294 -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, 295 0, NULL, 0, 0, 1000000, TPS65218_REG_SEQ5, 296 TPS65218_SEQ5_DC5_SEQ_MASK), 297 TPS65218_REGULATOR("DCDC6", "regulator-dcdc6", TPS65218_DCDC_6, 298 REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, 299 -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, 300 0, NULL, 0, 0, 1800000, TPS65218_REG_SEQ5, 301 TPS65218_SEQ5_DC6_SEQ_MASK), 302 TPS65218_REGULATOR("LDO1", "regulator-ldo1", TPS65218_LDO_1, 303 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, 304 TPS65218_REG_CONTROL_LDO1, 305 TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, 306 TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges, 307 2, 0, 0, TPS65218_REG_SEQ6, 308 TPS65218_SEQ6_LDO1_SEQ_MASK), 309 TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3, 310 REGULATOR_CURRENT, tps65218_ls3_ops, 0, 0, 0, 311 TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN, 312 TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK, 313 NULL, 0, 0, 0, 0, 0), 314 }; 315 316 static int tps65218_regulator_probe(struct platform_device *pdev) 317 { 318 struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); 319 struct regulator_dev *rdev; 320 struct regulator_config config = { }; 321 int i, ret; 322 unsigned int val; 323 324 config.dev = &pdev->dev; 325 config.dev->of_node = tps->dev->of_node; 326 config.driver_data = tps; 327 config.regmap = tps->regmap; 328 329 /* Allocate memory for strobes */ 330 tps->strobes = devm_kzalloc(&pdev->dev, sizeof(u8) * 331 TPS65218_NUM_REGULATOR, GFP_KERNEL); 332 333 for (i = 0; i < ARRAY_SIZE(regulators); i++) { 334 rdev = devm_regulator_register(&pdev->dev, ®ulators[i], 335 &config); 336 if (IS_ERR(rdev)) { 337 dev_err(tps->dev, "failed to register %s regulator\n", 338 pdev->name); 339 return PTR_ERR(rdev); 340 } 341 342 ret = regmap_read(tps->regmap, regulators[i].bypass_reg, &val); 343 if (ret) 344 return ret; 345 346 tps->strobes[i] = val & regulators[i].bypass_mask; 347 } 348 349 return 0; 350 } 351 352 static const struct platform_device_id tps65218_regulator_id_table[] = { 353 { "tps65218-regulator", }, 354 { /* sentinel */ } 355 }; 356 MODULE_DEVICE_TABLE(platform, tps65218_regulator_id_table); 357 358 static struct platform_driver tps65218_regulator_driver = { 359 .driver = { 360 .name = "tps65218-pmic", 361 }, 362 .probe = tps65218_regulator_probe, 363 .id_table = tps65218_regulator_id_table, 364 }; 365 366 module_platform_driver(tps65218_regulator_driver); 367 368 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 369 MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); 370 MODULE_ALIAS("platform:tps65218-pmic"); 371 MODULE_LICENSE("GPL v2"); 372