drivers/regulator/88pm800.c

   1 /*
   2  * Regulators driver for Marvell 88PM800
   3  *
   4  * Copyright (C) 2012 Marvell International Ltd.
   5  * Joseph(Yossi) Hanin <yhanin@marvell.com>
   6  * Yi Zhang <yizhang@marvell.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/init.h>
  15 #include <linux/err.h>
  16 #include <linux/regmap.h>
  17 #include <linux/regulator/driver.h>
  18 #include <linux/regulator/machine.h>
  19 #include <linux/mfd/88pm80x.h>
  20 #include <linux/delay.h>
  21 #include <linux/io.h>
  22 #include <linux/of.h>
  23 #include <linux/regulator/of_regulator.h>
  24
  25 /* LDO1 with DVC[0..3] */
  26 #define PM800_LDO1_VOUT         (0x08) /* VOUT1 */
  27 #define PM800_LDO1_VOUT_2       (0x09)
  28 #define PM800_LDO1_VOUT_3       (0x0A)
  29 #define PM800_LDO2_VOUT         (0x0B)
  30 #define PM800_LDO3_VOUT         (0x0C)
  31 #define PM800_LDO4_VOUT         (0x0D)
  32 #define PM800_LDO5_VOUT         (0x0E)
  33 #define PM800_LDO6_VOUT         (0x0F)
  34 #define PM800_LDO7_VOUT         (0x10)
  35 #define PM800_LDO8_VOUT         (0x11)
  36 #define PM800_LDO9_VOUT         (0x12)
  37 #define PM800_LDO10_VOUT        (0x13)
  38 #define PM800_LDO11_VOUT        (0x14)
  39 #define PM800_LDO12_VOUT        (0x15)
  40 #define PM800_LDO13_VOUT        (0x16)
  41 #define PM800_LDO14_VOUT        (0x17)
  42 #define PM800_LDO15_VOUT        (0x18)
  43 #define PM800_LDO16_VOUT        (0x19)
  44 #define PM800_LDO17_VOUT        (0x1A)
  45 #define PM800_LDO18_VOUT        (0x1B)
  46 #define PM800_LDO19_VOUT        (0x1C)
  47
  48 /* BUCK1 with DVC[0..3] */
  49 #define PM800_BUCK1             (0x3C)
  50 #define PM800_BUCK1_1           (0x3D)
  51 #define PM800_BUCK1_2           (0x3E)
  52 #define PM800_BUCK1_3           (0x3F)
  53 #define PM800_BUCK2             (0x40)
  54 #define PM800_BUCK3             (0x41)
  55 #define PM800_BUCK3             (0x41)
  56 #define PM800_BUCK4             (0x42)
  57 #define PM800_BUCK4_1           (0x43)
  58 #define PM800_BUCK4_2           (0x44)
  59 #define PM800_BUCK4_3           (0x45)
  60 #define PM800_BUCK5             (0x46)
  61
  62 #define PM800_BUCK_ENA          (0x50)
  63 #define PM800_LDO_ENA1_1        (0x51)
  64 #define PM800_LDO_ENA1_2        (0x52)
  65 #define PM800_LDO_ENA1_3        (0x53)
  66
  67 #define PM800_LDO_ENA2_1        (0x56)
  68 #define PM800_LDO_ENA2_2        (0x57)
  69 #define PM800_LDO_ENA2_3        (0x58)
  70
  71 #define PM800_BUCK1_MISC1       (0x78)
  72 #define PM800_BUCK3_MISC1       (0x7E)
  73 #define PM800_BUCK4_MISC1       (0x81)
  74 #define PM800_BUCK5_MISC1       (0x84)
  75
  76 struct pm800_regulator_info {
  77         struct regulator_desc desc;
  78         int max_ua;
  79 };
  80
  81 struct pm800_regulators {
  82         struct regulator_dev *regulators[PM800_ID_RG_MAX];
  83         struct pm80x_chip *chip;
  84         struct regmap *map;
  85 };
  86
  87 /*
  88  * vreg - the buck regs string.
  89  * ereg - the string for the enable register.
  90  * ebit - the bit number in the enable register.
  91  * amax - the current
  92  * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
  93  * not the constant voltage table.
  94  * n_volt - Number of available selectors
  95  */
  96 #define PM800_BUCK(vreg, ereg, ebit, amax, volt_ranges, n_volt)         \
  97 {                                                                       \
  98         .desc   = {                                                     \
  99                 .name   = #vreg,                                        \
 100                 .ops    = &pm800_volt_range_ops,                        \
 101                 .type   = REGULATOR_VOLTAGE,                            \
 102                 .id     = PM800_ID_##vreg,                              \
 103                 .owner  = THIS_MODULE,                                  \
 104                 .n_voltages             = n_volt,                       \
 105                 .linear_ranges          = volt_ranges,                  \
 106                 .n_linear_ranges        = ARRAY_SIZE(volt_ranges),      \
 107                 .vsel_reg               = PM800_##vreg,                 \
 108                 .vsel_mask              = 0x7f,                         \
 109                 .enable_reg             = PM800_##ereg,                 \
 110                 .enable_mask            = 1 << (ebit),                  \
 111         },                                                              \
 112         .max_ua         = (amax),                                       \
 113 }
 114
 115 /*
 116  * vreg - the LDO regs string
 117  * ereg -  the string for the enable register.
 118  * ebit - the bit number in the enable register.
 119  * amax - the current
 120  * volt_table - the LDO voltage table
 121  * For all the LDOes, there are too many ranges. Using volt_table will be
 122  * simpler and faster.
 123  */
 124 #define PM800_LDO(vreg, ereg, ebit, amax, ldo_volt_table)               \
 125 {                                                                       \
 126         .desc   = {                                                     \
 127                 .name   = #vreg,                                        \
 128                 .ops    = &pm800_volt_table_ops,                        \
 129                 .type   = REGULATOR_VOLTAGE,                            \
 130                 .id     = PM800_ID_##vreg,                              \
 131                 .owner  = THIS_MODULE,                                  \
 132                 .n_voltages = ARRAY_SIZE(ldo_volt_table),               \
 133                 .vsel_reg       = PM800_##vreg##_VOUT,                  \
 134                 .vsel_mask      = 0x1f,                                 \
 135                 .enable_reg     = PM800_##ereg,                         \
 136                 .enable_mask    = 1 << (ebit),                          \
 137                 .volt_table     = ldo_volt_table,                       \
 138         },                                                              \
 139         .max_ua         = (amax),                                       \
 140 }
 141
 142 /* Ranges are sorted in ascending order. */
 143 static const struct regulator_linear_range buck1_volt_range[] = {
 144         { .min_uV = 600000, .max_uV = 1587500, .min_sel = 0, .max_sel = 0x4f,
 145           .uV_step = 12500 },
 146         { .min_uV = 1600000, .max_uV = 1800000, .min_sel = 0x50,
 147           .max_sel = 0x54, .uV_step = 50000 },
 148 };
 149
 150 /* BUCK 2~5 have same ranges. */
 151 static const struct regulator_linear_range buck2_5_volt_range[] = {
 152         { .min_uV = 600000, .max_uV = 1587500,  .min_sel = 0, .max_sel = 0x4f,
 153           .uV_step = 12500 },
 154         { .min_uV = 1600000, .max_uV = 3300000, .min_sel = 0x50,
 155           .max_sel = 0x72, .uV_step = 50000 },
 156 };
 157
 158 static const unsigned int ldo1_volt_table[] = {
 159         600000,  650000,  700000,  750000,  800000,  850000,  900000,  950000,
 160         1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
 161 };
 162
 163 static const unsigned int ldo2_volt_table[] = {
 164         1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
 165 };
 166
 167 /* LDO 3~17 have same voltage table. */
 168 static const unsigned int ldo3_17_volt_table[] = {
 169         1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
 170         2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
 171 };
 172
 173 /* LDO 18~19 have same voltage table. */
 174 static const unsigned int ldo18_19_volt_table[] = {
 175         1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
 176 };
 177
 178 static int pm800_get_current_limit(struct regulator_dev *rdev)
 179 {
 180         struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
 181
 182         return info->max_ua;
 183 }
 184
 185 static struct regulator_ops pm800_volt_range_ops = {
 186         .list_voltage = regulator_list_voltage_linear_range,
 187         .map_voltage = regulator_map_voltage_linear_range,
 188         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 189         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 190         .enable = regulator_enable_regmap,
 191         .disable = regulator_disable_regmap,
 192         .is_enabled = regulator_is_enabled_regmap,
 193         .get_current_limit = pm800_get_current_limit,
 194 };
 195
 196 static struct regulator_ops pm800_volt_table_ops = {
 197         .list_voltage = regulator_list_voltage_table,
 198         .map_voltage = regulator_map_voltage_iterate,
 199         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 200         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 201         .enable = regulator_enable_regmap,
 202         .disable = regulator_disable_regmap,
 203         .is_enabled = regulator_is_enabled_regmap,
 204         .get_current_limit = pm800_get_current_limit,
 205 };
 206
 207 /* The array is indexed by id(PM800_ID_XXX) */
 208 static struct pm800_regulator_info pm800_regulator_info[] = {
 209         PM800_BUCK(BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55),
 210         PM800_BUCK(BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73),
 211         PM800_BUCK(BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73),
 212         PM800_BUCK(BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73),
 213         PM800_BUCK(BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73),
 214
 215         PM800_LDO(LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
 216         PM800_LDO(LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
 217         PM800_LDO(LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
 218         PM800_LDO(LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
 219         PM800_LDO(LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
 220         PM800_LDO(LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
 221         PM800_LDO(LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
 222         PM800_LDO(LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
 223         PM800_LDO(LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
 224         PM800_LDO(LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
 225         PM800_LDO(LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
 226         PM800_LDO(LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
 227         PM800_LDO(LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
 228         PM800_LDO(LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
 229         PM800_LDO(LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
 230         PM800_LDO(LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
 231         PM800_LDO(LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
 232         PM800_LDO(LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
 233         PM800_LDO(LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
 234 };
 235
 236 #define PM800_REGULATOR_OF_MATCH(_name, _id)                            \
 237         [PM800_ID_##_id] = {                                            \
 238                 .name = #_name,                                         \
 239                 .driver_data = &pm800_regulator_info[PM800_ID_##_id],   \
 240         }
 241
 242 static struct of_regulator_match pm800_regulator_matches[] = {
 243         PM800_REGULATOR_OF_MATCH(buck1, BUCK1),
 244         PM800_REGULATOR_OF_MATCH(buck2, BUCK2),
 245         PM800_REGULATOR_OF_MATCH(buck3, BUCK3),
 246         PM800_REGULATOR_OF_MATCH(buck4, BUCK4),
 247         PM800_REGULATOR_OF_MATCH(buck5, BUCK5),
 248         PM800_REGULATOR_OF_MATCH(ldo1, LDO1),
 249         PM800_REGULATOR_OF_MATCH(ldo2, LDO2),
 250         PM800_REGULATOR_OF_MATCH(ldo3, LDO3),
 251         PM800_REGULATOR_OF_MATCH(ldo4, LDO4),
 252         PM800_REGULATOR_OF_MATCH(ldo5, LDO5),
 253         PM800_REGULATOR_OF_MATCH(ldo6, LDO6),
 254         PM800_REGULATOR_OF_MATCH(ldo7, LDO7),
 255         PM800_REGULATOR_OF_MATCH(ldo8, LDO8),
 256         PM800_REGULATOR_OF_MATCH(ldo9, LDO9),
 257         PM800_REGULATOR_OF_MATCH(ldo10, LDO10),
 258         PM800_REGULATOR_OF_MATCH(ldo11, LDO11),
 259         PM800_REGULATOR_OF_MATCH(ldo12, LDO12),
 260         PM800_REGULATOR_OF_MATCH(ldo13, LDO13),
 261         PM800_REGULATOR_OF_MATCH(ldo14, LDO14),
 262         PM800_REGULATOR_OF_MATCH(ldo15, LDO15),
 263         PM800_REGULATOR_OF_MATCH(ldo16, LDO16),
 264         PM800_REGULATOR_OF_MATCH(ldo17, LDO17),
 265         PM800_REGULATOR_OF_MATCH(ldo18, LDO18),
 266         PM800_REGULATOR_OF_MATCH(ldo19, LDO19),
 267 };
 268
 269 static int pm800_regulator_dt_init(struct platform_device *pdev)
 270 {
 271         struct device_node *np = pdev->dev.of_node;
 272         int ret;
 273
 274         ret = of_regulator_match(&pdev->dev, np,
 275                                  pm800_regulator_matches,
 276                                  ARRAY_SIZE(pm800_regulator_matches));
 277         if (ret < 0)
 278                 return ret;
 279
 280         return 0;
 281 }
 282
 283 static int pm800_regulator_probe(struct platform_device *pdev)
 284 {
 285         struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
 286         struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent);
 287         struct pm800_regulators *pm800_data;
 288         struct pm800_regulator_info *info;
 289         struct regulator_config config = { };
 290         struct regulator_init_data *init_data;
 291         int i, ret;
 292
 293         if (!pdata || pdata->num_regulators == 0) {
 294                 if (IS_ENABLED(CONFIG_OF)) {
 295                         ret = pm800_regulator_dt_init(pdev);
 296                         if (ret)
 297                                 return ret;
 298                 } else {
 299                         return -ENODEV;
 300                 }
 301         } else if (pdata->num_regulators) {
 302                 unsigned int count = 0;
 303
 304                 /* Check whether num_regulator is valid. */
 305                 for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) {
 306                         if (pdata->regulators[i])
 307                                 count++;
 308                 }
 309                 if (count != pdata->num_regulators)
 310                         return -EINVAL;
 311         } else {
 312                 return -EINVAL;
 313         }
 314
 315         pm800_data = devm_kzalloc(&pdev->dev, sizeof(*pm800_data),
 316                                         GFP_KERNEL);
 317         if (!pm800_data) {
 318                 dev_err(&pdev->dev, "Failed to allocate pm800_regualtors");
 319                 return -ENOMEM;
 320         }
 321
 322         pm800_data->map = chip->subchip->regmap_power;
 323         pm800_data->chip = chip;
 324
 325         platform_set_drvdata(pdev, pm800_data);
 326
 327         for (i = 0; i < PM800_ID_RG_MAX; i++) {
 328                 if (!pdata || pdata->num_regulators == 0)
 329                         init_data = pm800_regulator_matches[i].init_data;
 330                 else
 331                         init_data = pdata->regulators[i];
 332                 if (!init_data)
 333                         continue;
 334                 info = pm800_regulator_matches[i].driver_data;
 335                 config.dev = &pdev->dev;
 336                 config.init_data = init_data;
 337                 config.driver_data = info;
 338                 config.regmap = pm800_data->map;
 339                 config.of_node = pm800_regulator_matches[i].of_node;
 340
 341                 pm800_data->regulators[i] =
 342                                 regulator_register(&info->desc, &config);
 343                 if (IS_ERR(pm800_data->regulators[i])) {
 344                         ret = PTR_ERR(pm800_data->regulators[i]);
 345                         dev_err(&pdev->dev, "Failed to register %s\n",
 346                                 info->desc.name);
 347
 348                         while (--i >= 0)
 349                                 regulator_unregister(pm800_data->regulators[i]);
 350
 351                         return ret;
 352                 }
 353         }
 354
 355         return 0;
 356 }
 357
 358 static int pm800_regulator_remove(struct platform_device *pdev)
 359 {
 360         struct pm800_regulators *pm800_data = platform_get_drvdata(pdev);
 361         int i;
 362
 363         for (i = 0; i < PM800_ID_RG_MAX; i++)
 364                 regulator_unregister(pm800_data->regulators[i]);
 365
 366         return 0;
 367 }
 368
 369 static struct platform_driver pm800_regulator_driver = {
 370         .driver         = {
 371                 .name   = "88pm80x-regulator",
 372                 .owner  = THIS_MODULE,
 373         },
 374         .probe          = pm800_regulator_probe,
 375         .remove         = pm800_regulator_remove,
 376 };
 377
 378 module_platform_driver(pm800_regulator_driver);
 379
 380 MODULE_LICENSE("GPL");
 381 MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
 382 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
 383 MODULE_ALIAS("platform:88pm800-regulator");