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