drivers/regulator/tps65217-regulator.c

   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(&regulators[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");