kernel/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_BUCK4             (0x42)
  56 #define PM800_BUCK4_1           (0x43)
  57 #define PM800_BUCK4_2           (0x44)
  58 #define PM800_BUCK4_3           (0x45)
  59 #define PM800_BUCK5             (0x46)
  60
  61 #define PM800_BUCK_ENA          (0x50)
  62 #define PM800_LDO_ENA1_1        (0x51)
  63 #define PM800_LDO_ENA1_2        (0x52)
  64 #define PM800_LDO_ENA1_3        (0x53)
  65
  66 #define PM800_LDO_ENA2_1        (0x56)
  67 #define PM800_LDO_ENA2_2        (0x57)
  68 #define PM800_LDO_ENA2_3        (0x58)
  69
  70 #define PM800_BUCK1_MISC1       (0x78)
  71 #define PM800_BUCK3_MISC1       (0x7E)
  72 #define PM800_BUCK4_MISC1       (0x81)
  73 #define PM800_BUCK5_MISC1       (0x84)
  74
  75 struct pm800_regulator_info {
  76         struct regulator_desc desc;
  77         int max_ua;
  78 };
  79
  80 struct pm800_regulators {
  81         struct pm80x_chip *chip;
  82         struct regmap *map;
  83 };
  84
  85 /*
  86  * vreg - the buck regs string.
  87  * ereg - the string for the enable register.
  88  * ebit - the bit number in the enable register.
  89  * amax - the current
  90  * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
  91  * not the constant voltage table.
  92  * n_volt - Number of available selectors
  93  */
  94 #define PM800_BUCK(match, vreg, ereg, ebit, amax, volt_ranges, n_volt)  \
  95 {                                                                       \
  96         .desc   = {                                                     \
  97                 .name                   = #vreg,                        \
  98                 .of_match               = of_match_ptr(#match),         \
  99                 .regulators_node        = of_match_ptr("regulators"),   \
 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(match, vreg, ereg, ebit, amax, ldo_volt_table)        \
 125 {                                                                       \
 126         .desc   = {                                                     \
 127                 .name                   = #vreg,                        \
 128                 .of_match               = of_match_ptr(#match),         \
 129                 .regulators_node        = of_match_ptr("regulators"),   \
 130                 .ops                    = &pm800_volt_table_ops,        \
 131                 .type                   = REGULATOR_VOLTAGE,            \
 132                 .id                     = PM800_ID_##vreg,              \
 133                 .owner                  = THIS_MODULE,                  \
 134                 .n_voltages             = ARRAY_SIZE(ldo_volt_table),   \
 135                 .vsel_reg               = PM800_##vreg##_VOUT,          \
 136                 .vsel_mask              = 0xf,                          \
 137                 .enable_reg             = PM800_##ereg,                 \
 138                 .enable_mask            = 1 << (ebit),                  \
 139                 .volt_table             = ldo_volt_table,               \
 140         },                                                              \
 141         .max_ua = (amax),                                               \
 142 }
 143
 144 /* Ranges are sorted in ascending order. */
 145 static const struct regulator_linear_range buck1_volt_range[] = {
 146         REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
 147         REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x54, 50000),
 148 };
 149
 150 /* BUCK 2~5 have same ranges. */
 151 static const struct regulator_linear_range buck2_5_volt_range[] = {
 152         REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
 153         REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x72, 50000),
 154 };
 155
 156 static const unsigned int ldo1_volt_table[] = {
 157         600000,  650000,  700000,  750000,  800000,  850000,  900000,  950000,
 158         1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
 159 };
 160
 161 static const unsigned int ldo2_volt_table[] = {
 162         1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
 163 };
 164
 165 /* LDO 3~17 have same voltage table. */
 166 static const unsigned int ldo3_17_volt_table[] = {
 167         1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
 168         2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
 169 };
 170
 171 /* LDO 18~19 have same voltage table. */
 172 static const unsigned int ldo18_19_volt_table[] = {
 173         1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
 174 };
 175
 176 static int pm800_get_current_limit(struct regulator_dev *rdev)
 177 {
 178         struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
 179
 180         return info->max_ua;
 181 }
 182
 183 static struct regulator_ops pm800_volt_range_ops = {
 184         .list_voltage           = regulator_list_voltage_linear_range,
 185         .map_voltage            = regulator_map_voltage_linear_range,
 186         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 187         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 188         .enable                 = regulator_enable_regmap,
 189         .disable                = regulator_disable_regmap,
 190         .is_enabled             = regulator_is_enabled_regmap,
 191         .get_current_limit      = pm800_get_current_limit,
 192 };
 193
 194 static struct regulator_ops pm800_volt_table_ops = {
 195         .list_voltage           = regulator_list_voltage_table,
 196         .map_voltage            = regulator_map_voltage_iterate,
 197         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 198         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 199         .enable                 = regulator_enable_regmap,
 200         .disable                = regulator_disable_regmap,
 201         .is_enabled             = regulator_is_enabled_regmap,
 202         .get_current_limit      = pm800_get_current_limit,
 203 };
 204
 205 /* The array is indexed by id(PM800_ID_XXX) */
 206 static struct pm800_regulator_info pm800_regulator_info[] = {
 207         PM800_BUCK(buck1, BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55),
 208         PM800_BUCK(buck2, BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73),
 209         PM800_BUCK(buck3, BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73),
 210         PM800_BUCK(buck4, BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73),
 211         PM800_BUCK(buck5, BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73),
 212
 213         PM800_LDO(ldo1, LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
 214         PM800_LDO(ldo2, LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
 215         PM800_LDO(ldo3, LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
 216         PM800_LDO(ldo4, LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
 217         PM800_LDO(ldo5, LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
 218         PM800_LDO(ldo6, LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
 219         PM800_LDO(ldo7, LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
 220         PM800_LDO(ldo8, LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
 221         PM800_LDO(ldo9, LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
 222         PM800_LDO(ldo10, LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
 223         PM800_LDO(ldo11, LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
 224         PM800_LDO(ldo12, LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
 225         PM800_LDO(ldo13, LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
 226         PM800_LDO(ldo14, LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
 227         PM800_LDO(ldo15, LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
 228         PM800_LDO(ldo16, LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
 229         PM800_LDO(ldo17, LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
 230         PM800_LDO(ldo18, LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
 231         PM800_LDO(ldo19, LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
 232 };
 233
 234 static int pm800_regulator_probe(struct platform_device *pdev)
 235 {
 236         struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
 237         struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent);
 238         struct pm800_regulators *pm800_data;
 239         struct regulator_config config = { };
 240         struct regulator_init_data *init_data;
 241         int i, ret;
 242
 243         if (pdata && pdata->num_regulators) {
 244                 unsigned int count = 0;
 245
 246                 /* Check whether num_regulator is valid. */
 247                 for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) {
 248                         if (pdata->regulators[i])
 249                                 count++;
 250                 }
 251                 if (count != pdata->num_regulators)
 252                         return -EINVAL;
 253         }
 254
 255         pm800_data = devm_kzalloc(&pdev->dev, sizeof(*pm800_data),
 256                                         GFP_KERNEL);
 257         if (!pm800_data)
 258                 return -ENOMEM;
 259
 260         pm800_data->map = chip->subchip->regmap_power;
 261         pm800_data->chip = chip;
 262
 263         platform_set_drvdata(pdev, pm800_data);
 264
 265         config.dev = chip->dev;
 266         config.regmap = pm800_data->map;
 267         for (i = 0; i < PM800_ID_RG_MAX; i++) {
 268                 struct regulator_dev *regulator;
 269
 270                 if (pdata && pdata->num_regulators) {
 271                         init_data = pdata->regulators[i];
 272                         if (!init_data)
 273                                 continue;
 274
 275                         config.init_data = init_data;
 276                 }
 277
 278                 config.driver_data = &pm800_regulator_info[i];
 279
 280                 regulator = devm_regulator_register(&pdev->dev,
 281                                 &pm800_regulator_info[i].desc, &config);
 282                 if (IS_ERR(regulator)) {
 283                         ret = PTR_ERR(regulator);
 284                         dev_err(&pdev->dev, "Failed to register %s\n",
 285                                         pm800_regulator_info[i].desc.name);
 286                         return ret;
 287                 }
 288         }
 289
 290         return 0;
 291 }
 292
 293 static struct platform_driver pm800_regulator_driver = {
 294         .driver         = {
 295                 .name   = "88pm80x-regulator",
 296         },
 297         .probe          = pm800_regulator_probe,
 298 };
 299
 300 module_platform_driver(pm800_regulator_driver);
 301
 302 MODULE_LICENSE("GPL");
 303 MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
 304 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
 305 MODULE_ALIAS("platform:88pm800-regulator");