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, _vr, _vm, _em, _t) \
  30         {                                               \
  31                 .name           = _name,                \
  32                 .id             = _id,                  \
  33                 .ops            = &_ops,                \
  34                 .n_voltages     = _n,                   \
  35                 .type           = REGULATOR_VOLTAGE,    \
  36                 .owner          = THIS_MODULE,          \
  37                 .vsel_reg       = _vr,                  \
  38                 .vsel_mask      = _vm,                  \
  39                 .enable_reg     = TPS65217_REG_ENABLE,  \
  40                 .enable_mask    = _em,                  \
  41                 .volt_table     = _t,                   \
  42         }                                               \
  43
  44 #define TPS65217_INFO(_nm, _min, _max, _f1, _f2)        \
  45         {                                               \
  46                 .name           = _nm,                  \
  47                 .min_uV         = _min,                 \
  48                 .max_uV         = _max,                 \
  49                 .vsel_to_uv     = _f1,                  \
  50                 .uv_to_vsel     = _f2,                  \
  51         }
  52
  53 static const unsigned 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),
 131         TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1,
 132                         tps65217_uv_to_vsel1),
 133         TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1,
 134                         tps65217_uv_to_vsel1),
 135         TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL),
 136         TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1,
 137                         tps65217_uv_to_vsel1),
 138         TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2,
 139                         tps65217_uv_to_vsel2),
 140         TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2,
 141                         tps65217_uv_to_vsel2),
 142 };
 143
 144 static int tps65217_pmic_enable(struct regulator_dev *dev)
 145 {
 146         struct tps65217 *tps = rdev_get_drvdata(dev);
 147         unsigned int rid = rdev_get_id(dev);
 148
 149         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 150                 return -EINVAL;
 151
 152         /* Enable the regulator and password protection is level 1 */
 153         return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
 154                                  dev->desc->enable_mask, dev->desc->enable_mask,
 155                                  TPS65217_PROTECT_L1);
 156 }
 157
 158 static int tps65217_pmic_disable(struct regulator_dev *dev)
 159 {
 160         struct tps65217 *tps = rdev_get_drvdata(dev);
 161         unsigned int rid = rdev_get_id(dev);
 162
 163         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 164                 return -EINVAL;
 165
 166         /* Disable the regulator and password protection is level 1 */
 167         return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
 168                                    dev->desc->enable_mask, TPS65217_PROTECT_L1);
 169 }
 170
 171 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
 172                                          unsigned selector)
 173 {
 174         int ret;
 175         struct tps65217 *tps = rdev_get_drvdata(dev);
 176         unsigned int rid = rdev_get_id(dev);
 177
 178         /* Set the voltage based on vsel value and write protect level is 2 */
 179         ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
 180                                 selector, TPS65217_PROTECT_L2);
 181
 182         /* Set GO bit for DCDCx to initiate voltage transistion */
 183         switch (rid) {
 184         case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
 185                 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
 186                                        TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
 187                                        TPS65217_PROTECT_L2);
 188                 break;
 189         }
 190
 191         return ret;
 192 }
 193
 194 static int tps65217_pmic_map_voltage(struct regulator_dev *dev,
 195                                      int min_uV, int max_uV)
 196 {
 197
 198         struct tps65217 *tps = rdev_get_drvdata(dev);
 199         unsigned int sel, rid = rdev_get_id(dev);
 200         int ret;
 201
 202         /* LDO1 uses regulator_map_voltage_iterate() */
 203         if (rid == TPS65217_LDO_1)
 204                 return -EINVAL;
 205
 206         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 207                 return -EINVAL;
 208
 209         if (min_uV < tps->info[rid]->min_uV)
 210                 min_uV = tps->info[rid]->min_uV;
 211
 212         if (max_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV)
 213                 return -EINVAL;
 214
 215         ret = tps->info[rid]->uv_to_vsel(min_uV, &sel);
 216         if (ret)
 217                 return ret;
 218
 219         return sel;
 220 }
 221
 222 static int tps65217_pmic_list_voltage(struct regulator_dev *dev,
 223                                         unsigned selector)
 224 {
 225         struct tps65217 *tps = rdev_get_drvdata(dev);
 226         unsigned int rid = rdev_get_id(dev);
 227
 228         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 229                 return -EINVAL;
 230
 231         if (selector >= dev->desc->n_voltages)
 232                 return -EINVAL;
 233
 234         return tps->info[rid]->vsel_to_uv(selector);
 235 }
 236
 237 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
 238 static struct regulator_ops tps65217_pmic_ops = {
 239         .is_enabled             = regulator_is_enabled_regmap,
 240         .enable                 = tps65217_pmic_enable,
 241         .disable                = tps65217_pmic_disable,
 242         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 243         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
 244         .list_voltage           = tps65217_pmic_list_voltage,
 245         .map_voltage            = tps65217_pmic_map_voltage,
 246 };
 247
 248 /* Operations permitted on LDO1 */
 249 static struct regulator_ops tps65217_pmic_ldo1_ops = {
 250         .is_enabled             = regulator_is_enabled_regmap,
 251         .enable                 = tps65217_pmic_enable,
 252         .disable                = tps65217_pmic_disable,
 253         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 254         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
 255         .list_voltage           = regulator_list_voltage_table,
 256 };
 257
 258 static const struct regulator_desc regulators[] = {
 259         TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64,
 260                            TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK,
 261                            TPS65217_ENABLE_DC1_EN, NULL),
 262         TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64,
 263                            TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK,
 264                            TPS65217_ENABLE_DC2_EN, NULL),
 265         TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64,
 266                            TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK,
 267                            TPS65217_ENABLE_DC3_EN, NULL),
 268         TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16,
 269                            TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK,
 270                            TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table),
 271         TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64,
 272                            TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK,
 273                            TPS65217_ENABLE_LDO2_EN, NULL),
 274         TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32,
 275                            TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
 276                            TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
 277                            NULL),
 278         TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32,
 279                            TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
 280                            TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
 281                            NULL),
 282 };
 283
 284 static int __devinit tps65217_regulator_probe(struct platform_device *pdev)
 285 {
 286         struct regulator_dev *rdev;
 287         struct tps65217 *tps;
 288         struct tps_info *info = &tps65217_pmic_regs[pdev->id];
 289         struct regulator_config config = { };
 290
 291         /* Already set by core driver */
 292         tps = dev_to_tps65217(pdev->dev.parent);
 293         tps->info[pdev->id] = info;
 294
 295         config.dev = &pdev->dev;
 296         config.of_node = pdev->dev.of_node;
 297         config.init_data = pdev->dev.platform_data;
 298         config.driver_data = tps;
 299
 300         rdev = regulator_register(&regulators[pdev->id], &config);
 301         if (IS_ERR(rdev))
 302                 return PTR_ERR(rdev);
 303
 304         platform_set_drvdata(pdev, rdev);
 305
 306         return 0;
 307 }
 308
 309 static int __devexit tps65217_regulator_remove(struct platform_device *pdev)
 310 {
 311         struct regulator_dev *rdev = platform_get_drvdata(pdev);
 312
 313         platform_set_drvdata(pdev, NULL);
 314         regulator_unregister(rdev);
 315
 316         return 0;
 317 }
 318
 319 static struct platform_driver tps65217_regulator_driver = {
 320         .driver = {
 321                 .name = "tps65217-pmic",
 322         },
 323         .probe = tps65217_regulator_probe,
 324         .remove = __devexit_p(tps65217_regulator_remove),
 325 };
 326
 327 static int __init tps65217_regulator_init(void)
 328 {
 329         return platform_driver_register(&tps65217_regulator_driver);
 330 }
 331 subsys_initcall(tps65217_regulator_init);
 332
 333 static void __exit tps65217_regulator_exit(void)
 334 {
 335         platform_driver_unregister(&tps65217_regulator_driver);
 336 }
 337 module_exit(tps65217_regulator_exit);
 338
 339 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
 340 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
 341 MODULE_ALIAS("platform:tps65217-pmic");
 342 MODULE_LICENSE("GPL v2");