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/of_regulator.h>
  26 #include <linux/regulator/driver.h>
  27 #include <linux/regulator/machine.h>
  28 #include <linux/mfd/tps65217.h>
  29
  30 #define TPS65217_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _em, _t, _lr, _nlr) \
  31         {                                               \
  32                 .name           = _name,                \
  33                 .id             = _id,                  \
  34                 .ops            = &_ops,                \
  35                 .n_voltages     = _n,                   \
  36                 .type           = REGULATOR_VOLTAGE,    \
  37                 .owner          = THIS_MODULE,          \
  38                 .vsel_reg       = _vr,                  \
  39                 .vsel_mask      = _vm,                  \
  40                 .enable_reg     = TPS65217_REG_ENABLE,  \
  41                 .enable_mask    = _em,                  \
  42                 .volt_table     = _t,                   \
  43                 .linear_ranges  = _lr,                  \
  44                 .n_linear_ranges = _nlr,                \
  45         }                                               \
  46
  47 static const unsigned int LDO1_VSEL_table[] = {
  48         1000000, 1100000, 1200000, 1250000,
  49         1300000, 1350000, 1400000, 1500000,
  50         1600000, 1800000, 2500000, 2750000,
  51         2800000, 3000000, 3100000, 3300000,
  52 };
  53
  54 static const struct regulator_linear_range tps65217_uv1_ranges[] = {
  55         { .min_uV = 900000, .max_uV = 1500000, .min_sel =  0, .max_sel = 24,
  56           .uV_step = 25000 },
  57         { .min_uV = 1550000, .max_uV = 1800000, .min_sel = 25, .max_sel = 30,
  58           .uV_step = 50000 },
  59         { .min_uV = 1850000, .max_uV = 2900000, .min_sel = 31, .max_sel = 52,
  60           .uV_step = 50000 },
  61         { .min_uV = 3000000, .max_uV = 3200000, .min_sel = 53, .max_sel = 55,
  62           .uV_step = 100000 },
  63         { .min_uV = 3300000, .max_uV = 3300000, .min_sel = 56, .max_sel = 62,
  64           .uV_step = 0 },
  65 };
  66
  67 static const struct regulator_linear_range tps65217_uv2_ranges[] = {
  68         { .min_uV = 1500000, .max_uV = 1900000, .min_sel =  0, .max_sel = 8,
  69           .uV_step = 50000 },
  70         { .min_uV = 2000000, .max_uV = 2400000, .min_sel = 9, .max_sel = 13,
  71           .uV_step = 100000 },
  72         { .min_uV = 2450000, .max_uV = 3300000, .min_sel = 14, .max_sel = 31,
  73           .uV_step = 50000 },
  74 };
  75
  76 static int tps65217_pmic_enable(struct regulator_dev *dev)
  77 {
  78         struct tps65217 *tps = rdev_get_drvdata(dev);
  79         unsigned int rid = rdev_get_id(dev);
  80
  81         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
  82                 return -EINVAL;
  83
  84         /* Enable the regulator and password protection is level 1 */
  85         return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
  86                                  dev->desc->enable_mask, dev->desc->enable_mask,
  87                                  TPS65217_PROTECT_L1);
  88 }
  89
  90 static int tps65217_pmic_disable(struct regulator_dev *dev)
  91 {
  92         struct tps65217 *tps = rdev_get_drvdata(dev);
  93         unsigned int rid = rdev_get_id(dev);
  94
  95         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
  96                 return -EINVAL;
  97
  98         /* Disable the regulator and password protection is level 1 */
  99         return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
 100                                    dev->desc->enable_mask, TPS65217_PROTECT_L1);
 101 }
 102
 103 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
 104                                          unsigned selector)
 105 {
 106         int ret;
 107         struct tps65217 *tps = rdev_get_drvdata(dev);
 108         unsigned int rid = rdev_get_id(dev);
 109
 110         /* Set the voltage based on vsel value and write protect level is 2 */
 111         ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
 112                                 selector, TPS65217_PROTECT_L2);
 113
 114         /* Set GO bit for DCDCx to initiate voltage transistion */
 115         switch (rid) {
 116         case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
 117                 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
 118                                        TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
 119                                        TPS65217_PROTECT_L2);
 120                 break;
 121         }
 122
 123         return ret;
 124 }
 125
 126 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
 127 static struct regulator_ops tps65217_pmic_ops = {
 128         .is_enabled             = regulator_is_enabled_regmap,
 129         .enable                 = tps65217_pmic_enable,
 130         .disable                = tps65217_pmic_disable,
 131         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 132         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
 133         .list_voltage           = regulator_list_voltage_linear_range,
 134         .map_voltage            = regulator_map_voltage_linear_range,
 135 };
 136
 137 /* Operations permitted on LDO1 */
 138 static struct regulator_ops tps65217_pmic_ldo1_ops = {
 139         .is_enabled             = regulator_is_enabled_regmap,
 140         .enable                 = tps65217_pmic_enable,
 141         .disable                = tps65217_pmic_disable,
 142         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 143         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
 144         .list_voltage           = regulator_list_voltage_table,
 145 };
 146
 147 static const struct regulator_desc regulators[] = {
 148         TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64,
 149                            TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK,
 150                            TPS65217_ENABLE_DC1_EN, NULL, tps65217_uv1_ranges,
 151                            2),  /* DCDC1 voltage range: 900000 ~ 1800000 */
 152         TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64,
 153                            TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK,
 154                            TPS65217_ENABLE_DC2_EN, NULL, tps65217_uv1_ranges,
 155                            ARRAY_SIZE(tps65217_uv1_ranges)),
 156         TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64,
 157                            TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK,
 158                            TPS65217_ENABLE_DC3_EN, NULL, tps65217_uv1_ranges,
 159                            1),  /* DCDC3 voltage range: 900000 ~ 1500000 */
 160         TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16,
 161                            TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK,
 162                            TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table, NULL, 0),
 163         TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64,
 164                            TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK,
 165                            TPS65217_ENABLE_LDO2_EN, NULL, tps65217_uv1_ranges,
 166                            ARRAY_SIZE(tps65217_uv1_ranges)),
 167         TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32,
 168                            TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
 169                            TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
 170                            NULL, tps65217_uv2_ranges,
 171                            ARRAY_SIZE(tps65217_uv2_ranges)),
 172         TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32,
 173                            TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
 174                            TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
 175                            NULL, tps65217_uv2_ranges,
 176                            ARRAY_SIZE(tps65217_uv2_ranges)),
 177 };
 178
 179 #ifdef CONFIG_OF
 180 static struct of_regulator_match reg_matches[] = {
 181         { .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 },
 182         { .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 },
 183         { .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 },
 184         { .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 },
 185         { .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 },
 186         { .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 },
 187         { .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 },
 188 };
 189
 190 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev)
 191 {
 192         struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
 193         struct device_node *node = tps->dev->of_node;
 194         struct tps65217_board *pdata;
 195         struct device_node *regs;
 196         int i, count;
 197
 198         regs = of_find_node_by_name(node, "regulators");
 199         if (!regs)
 200                 return NULL;
 201
 202         count = of_regulator_match(&pdev->dev, regs, reg_matches,
 203                                    TPS65217_NUM_REGULATOR);
 204         of_node_put(regs);
 205         if ((count < 0) || (count > TPS65217_NUM_REGULATOR))
 206                 return NULL;
 207
 208         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 209         if (!pdata)
 210                 return NULL;
 211
 212         for (i = 0; i < count; i++) {
 213                 if (!reg_matches[i].init_data || !reg_matches[i].of_node)
 214                         continue;
 215
 216                 pdata->tps65217_init_data[i] = reg_matches[i].init_data;
 217                 pdata->of_node[i] = reg_matches[i].of_node;
 218         }
 219
 220         return pdata;
 221 }
 222 #else
 223 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev)
 224 {
 225         return NULL;
 226 }
 227 #endif
 228
 229 static int tps65217_regulator_probe(struct platform_device *pdev)
 230 {
 231         struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
 232         struct tps65217_board *pdata = dev_get_platdata(tps->dev);
 233         struct regulator_init_data *reg_data;
 234         struct regulator_dev *rdev;
 235         struct regulator_config config = { };
 236         int i, ret;
 237
 238         if (tps->dev->of_node)
 239                 pdata = tps65217_parse_dt(pdev);
 240
 241         if (!pdata) {
 242                 dev_err(&pdev->dev, "Platform data not found\n");
 243                 return -EINVAL;
 244         }
 245
 246         if (tps65217_chip_id(tps) != TPS65217) {
 247                 dev_err(&pdev->dev, "Invalid tps chip version\n");
 248                 return -ENODEV;
 249         }
 250
 251         platform_set_drvdata(pdev, tps);
 252
 253         for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
 254
 255                 reg_data = pdata->tps65217_init_data[i];
 256
 257                 /*
 258                  * Regulator API handles empty constraints but not NULL
 259                  * constraints
 260                  */
 261                 if (!reg_data)
 262                         continue;
 263
 264                 /* Register the regulators */
 265                 config.dev = tps->dev;
 266                 config.init_data = reg_data;
 267                 config.driver_data = tps;
 268                 config.regmap = tps->regmap;
 269                 if (tps->dev->of_node)
 270                         config.of_node = pdata->of_node[i];
 271
 272                 rdev = regulator_register(&regulators[i], &config);
 273                 if (IS_ERR(rdev)) {
 274                         dev_err(tps->dev, "failed to register %s regulator\n",
 275                                 pdev->name);
 276                         ret = PTR_ERR(rdev);
 277                         goto err_unregister_regulator;
 278                 }
 279
 280                 /* Save regulator for cleanup */
 281                 tps->rdev[i] = rdev;
 282         }
 283         return 0;
 284
 285 err_unregister_regulator:
 286         while (--i >= 0)
 287                 regulator_unregister(tps->rdev[i]);
 288
 289         return ret;
 290 }
 291
 292 static int tps65217_regulator_remove(struct platform_device *pdev)
 293 {
 294         struct tps65217 *tps = platform_get_drvdata(pdev);
 295         unsigned int i;
 296
 297         for (i = 0; i < TPS65217_NUM_REGULATOR; i++)
 298                 regulator_unregister(tps->rdev[i]);
 299
 300         return 0;
 301 }
 302
 303 static struct platform_driver tps65217_regulator_driver = {
 304         .driver = {
 305                 .name = "tps65217-pmic",
 306         },
 307         .probe = tps65217_regulator_probe,
 308         .remove = tps65217_regulator_remove,
 309 };
 310
 311 static int __init tps65217_regulator_init(void)
 312 {
 313         return platform_driver_register(&tps65217_regulator_driver);
 314 }
 315 subsys_initcall(tps65217_regulator_init);
 316
 317 static void __exit tps65217_regulator_exit(void)
 318 {
 319         platform_driver_unregister(&tps65217_regulator_driver);
 320 }
 321 module_exit(tps65217_regulator_exit);
 322
 323 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
 324 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
 325 MODULE_ALIAS("platform:tps65217-pmic");
 326 MODULE_LICENSE("GPL v2");