1 /* 2 * tps65217-regulator.c 3 * 4 * Regulator driver for TPS65217 PMIC 5 * 6 * Copyright (C) 2011 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 as 10 * published by the Free Software Foundation version 2. 11 * 12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 13 * kind, whether express or implied; without even the implied warranty 14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License 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 25 #include <linux/regulator/driver.h> 26 #include <linux/regulator/machine.h> 27 #include <linux/mfd/tps65217.h> 28 29 #define TPS65217_REGULATOR(_name, _id, _ops, _n) \ 30 { \ 31 .name = _name, \ 32 .id = _id, \ 33 .ops = &_ops, \ 34 .n_voltages = _n, \ 35 .type = REGULATOR_VOLTAGE, \ 36 .owner = THIS_MODULE, \ 37 } \ 38 39 #define TPS65217_INFO(_nm, _min, _max, _f1, _f2, _t, _n, _em, _vr, _vm) \ 40 { \ 41 .name = _nm, \ 42 .min_uV = _min, \ 43 .max_uV = _max, \ 44 .vsel_to_uv = _f1, \ 45 .uv_to_vsel = _f2, \ 46 .table = _t, \ 47 .table_len = _n, \ 48 .enable_mask = _em, \ 49 .set_vout_reg = _vr, \ 50 .set_vout_mask = _vm, \ 51 } 52 53 static const int LDO1_VSEL_table[] = { 54 1000000, 1100000, 1200000, 1250000, 55 1300000, 1350000, 1400000, 1500000, 56 1600000, 1800000, 2500000, 2750000, 57 2800000, 3000000, 3100000, 3300000, 58 }; 59 60 static int tps65217_vsel_to_uv1(unsigned int vsel) 61 { 62 int uV = 0; 63 64 if (vsel > 63) 65 return -EINVAL; 66 67 if (vsel <= 24) 68 uV = vsel * 25000 + 900000; 69 else if (vsel <= 52) 70 uV = (vsel - 24) * 50000 + 1500000; 71 else if (vsel < 56) 72 uV = (vsel - 52) * 100000 + 2900000; 73 else 74 uV = 3300000; 75 76 return uV; 77 } 78 79 static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel) 80 { 81 if ((uV < 0) && (uV > 3300000)) 82 return -EINVAL; 83 84 if (uV <= 1500000) 85 *vsel = DIV_ROUND_UP(uV - 900000, 25000); 86 else if (uV <= 2900000) 87 *vsel = 24 + DIV_ROUND_UP(uV - 1500000, 50000); 88 else if (uV < 3300000) 89 *vsel = 52 + DIV_ROUND_UP(uV - 2900000, 100000); 90 else 91 *vsel = 56; 92 93 return 0; 94 } 95 96 static int tps65217_vsel_to_uv2(unsigned int vsel) 97 { 98 int uV = 0; 99 100 if (vsel > 31) 101 return -EINVAL; 102 103 if (vsel <= 8) 104 uV = vsel * 50000 + 1500000; 105 else if (vsel <= 13) 106 uV = (vsel - 8) * 100000 + 1900000; 107 else 108 uV = (vsel - 13) * 50000 + 2400000; 109 110 return uV; 111 } 112 113 static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel) 114 { 115 if ((uV < 0) && (uV > 3300000)) 116 return -EINVAL; 117 118 if (uV <= 1900000) 119 *vsel = DIV_ROUND_UP(uV - 1500000, 50000); 120 else if (uV <= 2400000) 121 *vsel = 8 + DIV_ROUND_UP(uV - 1900000, 100000); 122 else 123 *vsel = 13 + DIV_ROUND_UP(uV - 2400000, 50000); 124 125 return 0; 126 } 127 128 static struct tps_info tps65217_pmic_regs[] = { 129 TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1, 130 tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC1_EN, 131 TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK), 132 TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1, 133 tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC2_EN, 134 TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK), 135 TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1, 136 tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC3_EN, 137 TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK), 138 TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL, LDO1_VSEL_table, 139 16, TPS65217_ENABLE_LDO1_EN, TPS65217_REG_DEFLDO1, 140 TPS65217_DEFLDO1_LDO1_MASK), 141 TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1, 142 tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_LDO2_EN, 143 TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK), 144 TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2, 145 tps65217_uv_to_vsel2, NULL, 32, 146 TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, 147 TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK), 148 TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2, 149 tps65217_uv_to_vsel2, NULL, 32, 150 TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, 151 TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK), 152 }; 153 154 static int tps65217_pmic_is_enabled(struct regulator_dev *dev) 155 { 156 int ret; 157 struct tps65217 *tps = rdev_get_drvdata(dev); 158 unsigned int data, rid = rdev_get_id(dev); 159 160 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 161 return -EINVAL; 162 163 ret = tps65217_reg_read(tps, TPS65217_REG_ENABLE, &data); 164 if (ret) 165 return ret; 166 167 return (data & tps->info[rid]->enable_mask) ? 1 : 0; 168 } 169 170 static int tps65217_pmic_enable(struct regulator_dev *dev) 171 { 172 struct tps65217 *tps = rdev_get_drvdata(dev); 173 unsigned int rid = rdev_get_id(dev); 174 175 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 176 return -EINVAL; 177 178 /* Enable the regulator and password protection is level 1 */ 179 return tps65217_set_bits(tps, TPS65217_REG_ENABLE, 180 tps->info[rid]->enable_mask, 181 tps->info[rid]->enable_mask, 182 TPS65217_PROTECT_L1); 183 } 184 185 static int tps65217_pmic_disable(struct regulator_dev *dev) 186 { 187 struct tps65217 *tps = rdev_get_drvdata(dev); 188 unsigned int rid = rdev_get_id(dev); 189 190 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 191 return -EINVAL; 192 193 /* Disable the regulator and password protection is level 1 */ 194 return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, 195 tps->info[rid]->enable_mask, TPS65217_PROTECT_L1); 196 } 197 198 static int tps65217_pmic_get_voltage_sel(struct regulator_dev *dev) 199 { 200 int ret; 201 struct tps65217 *tps = rdev_get_drvdata(dev); 202 unsigned int selector, rid = rdev_get_id(dev); 203 204 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 205 return -EINVAL; 206 207 ret = tps65217_reg_read(tps, tps->info[rid]->set_vout_reg, &selector); 208 if (ret) 209 return ret; 210 211 selector &= tps->info[rid]->set_vout_mask; 212 213 return selector; 214 } 215 216 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, 217 unsigned selector) 218 { 219 int ret; 220 struct tps65217 *tps = rdev_get_drvdata(dev); 221 unsigned int rid = rdev_get_id(dev); 222 223 /* Set the voltage based on vsel value and write protect level is 2 */ 224 ret = tps65217_set_bits(tps, tps->info[rid]->set_vout_reg, 225 tps->info[rid]->set_vout_mask, 226 selector, TPS65217_PROTECT_L2); 227 228 /* Set GO bit for DCDCx to initiate voltage transistion */ 229 switch (rid) { 230 case TPS65217_DCDC_1 ... TPS65217_DCDC_3: 231 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, 232 TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, 233 TPS65217_PROTECT_L2); 234 break; 235 } 236 237 return ret; 238 } 239 240 static int tps65217_pmic_map_voltage(struct regulator_dev *dev, 241 int min_uV, int max_uV) 242 { 243 244 struct tps65217 *tps = rdev_get_drvdata(dev); 245 unsigned int sel, rid = rdev_get_id(dev); 246 int ret; 247 248 /* LDO1 uses regulator_map_voltage_iterate() */ 249 if (rid == TPS65217_LDO_1) 250 return -EINVAL; 251 252 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 253 return -EINVAL; 254 255 if (min_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV) 256 return -EINVAL; 257 258 if (max_uV < tps->info[rid]->min_uV || max_uV > tps->info[rid]->max_uV) 259 return -EINVAL; 260 261 ret = tps->info[rid]->uv_to_vsel(min_uV, &sel); 262 if (ret) 263 return ret; 264 265 return sel; 266 } 267 268 static int tps65217_pmic_list_voltage(struct regulator_dev *dev, 269 unsigned selector) 270 { 271 struct tps65217 *tps = rdev_get_drvdata(dev); 272 unsigned int rid = rdev_get_id(dev); 273 274 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 275 return -EINVAL; 276 277 if (selector >= tps->info[rid]->table_len) 278 return -EINVAL; 279 280 if (tps->info[rid]->table) 281 return tps->info[rid]->table[selector]; 282 283 return tps->info[rid]->vsel_to_uv(selector); 284 } 285 286 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ 287 static struct regulator_ops tps65217_pmic_ops = { 288 .is_enabled = tps65217_pmic_is_enabled, 289 .enable = tps65217_pmic_enable, 290 .disable = tps65217_pmic_disable, 291 .get_voltage_sel = tps65217_pmic_get_voltage_sel, 292 .set_voltage_sel = tps65217_pmic_set_voltage_sel, 293 .list_voltage = tps65217_pmic_list_voltage, 294 .map_voltage = tps65217_pmic_map_voltage, 295 }; 296 297 /* Operations permitted on LDO1 */ 298 static struct regulator_ops tps65217_pmic_ldo1_ops = { 299 .is_enabled = tps65217_pmic_is_enabled, 300 .enable = tps65217_pmic_enable, 301 .disable = tps65217_pmic_disable, 302 .get_voltage_sel = tps65217_pmic_get_voltage_sel, 303 .set_voltage_sel = tps65217_pmic_set_voltage_sel, 304 .list_voltage = tps65217_pmic_list_voltage, 305 }; 306 307 static const struct regulator_desc regulators[] = { 308 TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64), 309 TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64), 310 TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64), 311 TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16), 312 TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64), 313 TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32), 314 TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32), 315 }; 316 317 static int __devinit tps65217_regulator_probe(struct platform_device *pdev) 318 { 319 struct regulator_dev *rdev; 320 struct tps65217 *tps; 321 struct tps_info *info = &tps65217_pmic_regs[pdev->id]; 322 struct regulator_config config = { }; 323 324 /* Already set by core driver */ 325 tps = dev_to_tps65217(pdev->dev.parent); 326 tps->info[pdev->id] = info; 327 328 config.dev = &pdev->dev; 329 config.init_data = pdev->dev.platform_data; 330 config.driver_data = tps; 331 332 rdev = regulator_register(®ulators[pdev->id], &config); 333 if (IS_ERR(rdev)) 334 return PTR_ERR(rdev); 335 336 platform_set_drvdata(pdev, rdev); 337 338 return 0; 339 } 340 341 static int __devexit tps65217_regulator_remove(struct platform_device *pdev) 342 { 343 struct regulator_dev *rdev = platform_get_drvdata(pdev); 344 345 platform_set_drvdata(pdev, NULL); 346 regulator_unregister(rdev); 347 348 return 0; 349 } 350 351 static struct platform_driver tps65217_regulator_driver = { 352 .driver = { 353 .name = "tps65217-pmic", 354 }, 355 .probe = tps65217_regulator_probe, 356 .remove = __devexit_p(tps65217_regulator_remove), 357 }; 358 359 static int __init tps65217_regulator_init(void) 360 { 361 return platform_driver_register(&tps65217_regulator_driver); 362 } 363 subsys_initcall(tps65217_regulator_init); 364 365 static void __exit tps65217_regulator_exit(void) 366 { 367 platform_driver_unregister(&tps65217_regulator_driver); 368 } 369 module_exit(tps65217_regulator_exit); 370 371 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); 372 MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); 373 MODULE_ALIAS("platform:tps65217-pmic"); 374 MODULE_LICENSE("GPL v2"); 375