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, _of_match, _ops, _n, _vr, _vm, _em, \
  31                            _t, _lr, _nlr,  _sr, _sm)    \
  32         {                                               \
  33                 .name           = _name,                \
  34                 .id             = _id,                  \
  35                 .of_match       = of_match_ptr(_of_match),    \
  36                 .regulators_node= of_match_ptr("regulators"), \
  37                 .ops            = &_ops,                \
  38                 .n_voltages     = _n,                   \
  39                 .type           = REGULATOR_VOLTAGE,    \
  40                 .owner          = THIS_MODULE,          \
  41                 .vsel_reg       = _vr,                  \
  42                 .vsel_mask      = _vm,                  \
  43                 .enable_reg     = TPS65217_REG_ENABLE,  \
  44                 .enable_mask    = _em,                  \
  45                 .volt_table     = _t,                   \
  46                 .linear_ranges  = _lr,                  \
  47                 .n_linear_ranges = _nlr,                \
  48                 .bypass_reg     = _sr,                  \
  49                 .bypass_mask    = _sm,                  \
  50         }                                               \
  51
  52 static const unsigned int LDO1_VSEL_table[] = {
  53         1000000, 1100000, 1200000, 1250000,
  54         1300000, 1350000, 1400000, 1500000,
  55         1600000, 1800000, 2500000, 2750000,
  56         2800000, 3000000, 3100000, 3300000,
  57 };
  58
  59 static const struct regulator_linear_range tps65217_uv1_ranges[] = {
  60         REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
  61         REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000),
  62         REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000),
  63         REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
  64         REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0),
  65 };
  66
  67 static const struct regulator_linear_range tps65217_uv2_ranges[] = {
  68         REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
  69         REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
  70         REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
  71 };
  72
  73 static int tps65217_pmic_enable(struct regulator_dev *dev)
  74 {
  75         struct tps65217 *tps = rdev_get_drvdata(dev);
  76         int rid = rdev_get_id(dev);
  77
  78         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
  79                 return -EINVAL;
  80
  81         /* Enable the regulator and password protection is level 1 */
  82         return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
  83                                  dev->desc->enable_mask, dev->desc->enable_mask,
  84                                  TPS65217_PROTECT_L1);
  85 }
  86
  87 static int tps65217_pmic_disable(struct regulator_dev *dev)
  88 {
  89         struct tps65217 *tps = rdev_get_drvdata(dev);
  90         int rid = rdev_get_id(dev);
  91
  92         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
  93                 return -EINVAL;
  94
  95         /* Disable the regulator and password protection is level 1 */
  96         return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
  97                                    dev->desc->enable_mask, TPS65217_PROTECT_L1);
  98 }
  99
 100 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
 101                                          unsigned selector)
 102 {
 103         int ret;
 104         struct tps65217 *tps = rdev_get_drvdata(dev);
 105         unsigned int rid = rdev_get_id(dev);
 106
 107         /* Set the voltage based on vsel value and write protect level is 2 */
 108         ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
 109                                 selector, TPS65217_PROTECT_L2);
 110
 111         /* Set GO bit for DCDCx to initiate voltage transistion */
 112         switch (rid) {
 113         case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
 114                 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
 115                                        TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
 116                                        TPS65217_PROTECT_L2);
 117                 break;
 118         }
 119
 120         return ret;
 121 }
 122
 123 static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev)
 124 {
 125         struct tps65217 *tps = rdev_get_drvdata(dev);
 126         unsigned int rid = rdev_get_id(dev);
 127
 128         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 129                 return -EINVAL;
 130
 131         return tps65217_clear_bits(tps, dev->desc->bypass_reg,
 132                                    dev->desc->bypass_mask,
 133                                    TPS65217_PROTECT_L1);
 134 }
 135
 136 static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev)
 137 {
 138         struct tps65217 *tps = rdev_get_drvdata(dev);
 139         unsigned int rid = rdev_get_id(dev);
 140
 141         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 142                 return -EINVAL;
 143
 144         if (!tps->strobes[rid])
 145                 return -EINVAL;
 146
 147         return tps65217_set_bits(tps, dev->desc->bypass_reg,
 148                                  dev->desc->bypass_mask,
 149                                  tps->strobes[rid], TPS65217_PROTECT_L1);
 150 }
 151
 152 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
 153 static struct regulator_ops tps65217_pmic_ops = {
 154         .is_enabled             = regulator_is_enabled_regmap,
 155         .enable                 = tps65217_pmic_enable,
 156         .disable                = tps65217_pmic_disable,
 157         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 158         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
 159         .list_voltage           = regulator_list_voltage_linear_range,
 160         .map_voltage            = regulator_map_voltage_linear_range,
 161         .set_suspend_enable     = tps65217_pmic_set_suspend_enable,
 162         .set_suspend_disable    = tps65217_pmic_set_suspend_disable,
 163 };
 164
 165 /* Operations permitted on LDO1 */
 166 static struct regulator_ops tps65217_pmic_ldo1_ops = {
 167         .is_enabled             = regulator_is_enabled_regmap,
 168         .enable                 = tps65217_pmic_enable,
 169         .disable                = tps65217_pmic_disable,
 170         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 171         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
 172         .list_voltage           = regulator_list_voltage_table,
 173         .map_voltage            = regulator_map_voltage_ascend,
 174         .set_suspend_enable     = tps65217_pmic_set_suspend_enable,
 175         .set_suspend_disable    = tps65217_pmic_set_suspend_disable,
 176 };
 177
 178 static const struct regulator_desc regulators[] = {
 179         TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1",
 180                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1,
 181                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN,
 182                            NULL, tps65217_uv1_ranges, 2, TPS65217_REG_SEQ1,
 183                            TPS65217_SEQ1_DC1_SEQ_MASK),
 184         TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2",
 185                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2,
 186                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN,
 187                            NULL, tps65217_uv1_ranges,
 188                            ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
 189                            TPS65217_SEQ1_DC2_SEQ_MASK),
 190         TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3",
 191                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3,
 192                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN,
 193                            NULL, tps65217_uv1_ranges, 1, TPS65217_REG_SEQ2,
 194                            TPS65217_SEQ2_DC3_SEQ_MASK),
 195         TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1",
 196                            tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1,
 197                            TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN,
 198                            LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2,
 199                            TPS65217_SEQ2_LDO1_SEQ_MASK),
 200         TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops,
 201                            64, TPS65217_REG_DEFLDO2,
 202                            TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN,
 203                            NULL, tps65217_uv1_ranges,
 204                            ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3,
 205                            TPS65217_SEQ3_LDO2_SEQ_MASK),
 206         TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops,
 207                            32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
 208                            TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
 209                            NULL, tps65217_uv2_ranges,
 210                            ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3,
 211                            TPS65217_SEQ3_LDO3_SEQ_MASK),
 212         TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops,
 213                            32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
 214                            TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
 215                            NULL, tps65217_uv2_ranges,
 216                            ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4,
 217                            TPS65217_SEQ4_LDO4_SEQ_MASK),
 218 };
 219
 220 static int tps65217_regulator_probe(struct platform_device *pdev)
 221 {
 222         struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
 223         struct tps65217_board *pdata = dev_get_platdata(tps->dev);
 224         struct regulator_dev *rdev;
 225         struct regulator_config config = { };
 226         int i, ret;
 227         unsigned int val;
 228
 229         if (tps65217_chip_id(tps) != TPS65217) {
 230                 dev_err(&pdev->dev, "Invalid tps chip version\n");
 231                 return -ENODEV;
 232         }
 233
 234         /* Allocate memory for strobes */
 235         tps->strobes = devm_kzalloc(&pdev->dev, sizeof(u8) *
 236                                     TPS65217_NUM_REGULATOR, GFP_KERNEL);
 237
 238         platform_set_drvdata(pdev, tps);
 239
 240         for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
 241                 /* Register the regulators */
 242                 config.dev = tps->dev;
 243                 if (pdata)
 244                         config.init_data = pdata->tps65217_init_data[i];
 245                 config.driver_data = tps;
 246                 config.regmap = tps->regmap;
 247
 248                 rdev = devm_regulator_register(&pdev->dev, &regulators[i],
 249                                                &config);
 250                 if (IS_ERR(rdev)) {
 251                         dev_err(tps->dev, "failed to register %s regulator\n",
 252                                 pdev->name);
 253                         return PTR_ERR(rdev);
 254                 }
 255
 256                 /* Store default strobe info */
 257                 ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val);
 258                 tps->strobes[i] = val & regulators[i].bypass_mask;
 259         }
 260
 261         return 0;
 262 }
 263
 264 static struct platform_driver tps65217_regulator_driver = {
 265         .driver = {
 266                 .name = "tps65217-pmic",
 267         },
 268         .probe = tps65217_regulator_probe,
 269 };
 270
 271 static int __init tps65217_regulator_init(void)
 272 {
 273         return platform_driver_register(&tps65217_regulator_driver);
 274 }
 275 subsys_initcall(tps65217_regulator_init);
 276
 277 static void __exit tps65217_regulator_exit(void)
 278 {
 279         platform_driver_unregister(&tps65217_regulator_driver);
 280 }
 281 module_exit(tps65217_regulator_exit);
 282
 283 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
 284 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
 285 MODULE_ALIAS("platform:tps65217-pmic");
 286 MODULE_LICENSE("GPL v2");