drivers/regulator/isl9305.c

   1 /*
   2  * isl9305 - Intersil ISL9305 DCDC regulator
   3  *
   4  * Copyright 2014 Linaro Ltd
   5  *
   6  * Author: Mark Brown <broonie@kernel.org>
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/err.h>
  16 #include <linux/i2c.h>
  17 #include <linux/of.h>
  18 #include <linux/platform_data/isl9305.h>
  19 #include <linux/regmap.h>
  20 #include <linux/regulator/driver.h>
  21 #include <linux/regulator/of_regulator.h>
  22 #include <linux/slab.h>
  23
  24 /*
  25  * Registers
  26  */
  27 #define ISL9305_DCD1OUT          0x0
  28 #define ISL9305_DCD2OUT          0x1
  29 #define ISL9305_LDO1OUT          0x2
  30 #define ISL9305_LDO2OUT          0x3
  31 #define ISL9305_DCD_PARAMETER    0x4
  32 #define ISL9305_SYSTEM_PARAMETER 0x5
  33 #define ISL9305_DCD_SRCTL        0x6
  34
  35 #define ISL9305_MAX_REG ISL9305_DCD_SRCTL
  36
  37 /*
  38  * DCD_PARAMETER
  39  */
  40 #define ISL9305_DCD_PHASE   0x40
  41 #define ISL9305_DCD2_ULTRA  0x20
  42 #define ISL9305_DCD1_ULTRA  0x10
  43 #define ISL9305_DCD2_BLD    0x08
  44 #define ISL9305_DCD1_BLD    0x04
  45 #define ISL9305_DCD2_MODE   0x02
  46 #define ISL9305_DCD1_MODE   0x01
  47
  48 /*
  49  * SYSTEM_PARAMETER
  50  */
  51 #define ISL9305_I2C_EN      0x40
  52 #define ISL9305_DCDPOR_MASK 0x30
  53 #define ISL9305_LDO2_EN     0x08
  54 #define ISL9305_LDO1_EN     0x04
  55 #define ISL9305_DCD2_EN     0x02
  56 #define ISL9305_DCD1_EN     0x01
  57
  58 /*
  59  * DCD_SRCTL
  60  */
  61 #define ISL9305_DCD2SR_MASK 0xc0
  62 #define ISL9305_DCD1SR_MASK 0x07
  63
  64 static const struct regulator_ops isl9305_ops = {
  65         .enable = regulator_enable_regmap,
  66         .disable = regulator_disable_regmap,
  67         .is_enabled = regulator_is_enabled_regmap,
  68         .list_voltage = regulator_list_voltage_linear,
  69         .get_voltage_sel = regulator_get_voltage_sel_regmap,
  70         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  71 };
  72
  73 static const struct regulator_desc isl9305_regulators[] = {
  74         [ISL9305_DCD1] = {
  75                 .name =         "DCD1",
  76                 .of_match =     of_match_ptr("dcd1"),
  77                 .regulators_node = of_match_ptr("regulators"),
  78                 .n_voltages =   0x70,
  79                 .min_uV =       825000,
  80                 .uV_step =      25000,
  81                 .vsel_reg =     ISL9305_DCD1OUT,
  82                 .vsel_mask =    0x7f,
  83                 .enable_reg =   ISL9305_SYSTEM_PARAMETER,
  84                 .enable_mask =  ISL9305_DCD1_EN,
  85                 .supply_name =  "VINDCD1",
  86                 .ops =          &isl9305_ops,
  87                 .owner =        THIS_MODULE,
  88         },
  89         [ISL9305_DCD2] = {
  90                 .name =         "DCD2",
  91                 .of_match =     of_match_ptr("dcd2"),
  92                 .regulators_node = of_match_ptr("regulators"),
  93                 .n_voltages =   0x70,
  94                 .min_uV =       825000,
  95                 .uV_step =      25000,
  96                 .vsel_reg =     ISL9305_DCD2OUT,
  97                 .vsel_mask =    0x7f,
  98                 .enable_reg =   ISL9305_SYSTEM_PARAMETER,
  99                 .enable_mask =  ISL9305_DCD2_EN,
 100                 .supply_name =  "VINDCD2",
 101                 .ops =          &isl9305_ops,
 102                 .owner =        THIS_MODULE,
 103         },
 104         [ISL9305_LDO1] = {
 105                 .name =         "LDO1",
 106                 .of_match =     of_match_ptr("ldo1"),
 107                 .regulators_node = of_match_ptr("regulators"),
 108                 .n_voltages =   0x37,
 109                 .min_uV =       900000,
 110                 .uV_step =      50000,
 111                 .vsel_reg =     ISL9305_LDO1OUT,
 112                 .vsel_mask =    0x3f,
 113                 .enable_reg =   ISL9305_SYSTEM_PARAMETER,
 114                 .enable_mask =  ISL9305_LDO1_EN,
 115                 .supply_name =  "VINLDO1",
 116                 .ops =          &isl9305_ops,
 117                 .owner =        THIS_MODULE,
 118         },
 119         [ISL9305_LDO2] = {
 120                 .name =         "LDO2",
 121                 .of_match =     of_match_ptr("ldo2"),
 122                 .regulators_node = of_match_ptr("regulators"),
 123                 .n_voltages =   0x37,
 124                 .min_uV =       900000,
 125                 .uV_step =      50000,
 126                 .vsel_reg =     ISL9305_LDO2OUT,
 127                 .vsel_mask =    0x3f,
 128                 .enable_reg =   ISL9305_SYSTEM_PARAMETER,
 129                 .enable_mask =  ISL9305_LDO2_EN,
 130                 .supply_name =  "VINLDO2",
 131                 .ops =          &isl9305_ops,
 132                 .owner =        THIS_MODULE,
 133         },
 134 };
 135
 136 static const struct regmap_config isl9305_regmap = {
 137         .reg_bits = 8,
 138         .val_bits = 8,
 139
 140         .max_register = ISL9305_MAX_REG,
 141         .cache_type = REGCACHE_RBTREE,
 142 };
 143
 144 static int isl9305_i2c_probe(struct i2c_client *i2c,
 145                              const struct i2c_device_id *id)
 146 {
 147         struct regulator_config config = { };
 148         struct isl9305_pdata *pdata = i2c->dev.platform_data;
 149         struct regulator_dev *rdev;
 150         struct regmap *regmap;
 151         int i, ret;
 152
 153         regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap);
 154         if (IS_ERR(regmap)) {
 155                 ret = PTR_ERR(regmap);
 156                 dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
 157                 return ret;
 158         }
 159
 160         config.dev = &i2c->dev;
 161
 162         for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) {
 163                 if (pdata)
 164                         config.init_data = pdata->init_data[i];
 165                 else
 166                         config.init_data = NULL;
 167
 168                 rdev = devm_regulator_register(&i2c->dev,
 169                                                &isl9305_regulators[i],
 170                                                &config);
 171                 if (IS_ERR(rdev)) {
 172                         ret = PTR_ERR(rdev);
 173                         dev_err(&i2c->dev, "Failed to register %s: %d\n",
 174                                 isl9305_regulators[i].name, ret);
 175                         return ret;
 176                 }
 177         }
 178
 179         return 0;
 180 }
 181
 182 #ifdef CONFIG_OF
 183 static const struct of_device_id isl9305_dt_ids[] = {
 184         { .compatible = "isl,isl9305" }, /* for backward compat., don't use */
 185         { .compatible = "isil,isl9305" },
 186         { .compatible = "isl,isl9305h" }, /* for backward compat., don't use */
 187         { .compatible = "isil,isl9305h" },
 188         {},
 189 };
 190 MODULE_DEVICE_TABLE(of, isl9305_dt_ids);
 191 #endif
 192
 193 static const struct i2c_device_id isl9305_i2c_id[] = {
 194         { "isl9305", },
 195         { "isl9305h", },
 196         { }
 197 };
 198 MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id);
 199
 200 static struct i2c_driver isl9305_regulator_driver = {
 201         .driver = {
 202                 .name = "isl9305",
 203                 .of_match_table = of_match_ptr(isl9305_dt_ids),
 204         },
 205         .probe = isl9305_i2c_probe,
 206         .id_table = isl9305_i2c_id,
 207 };
 208
 209 module_i2c_driver(isl9305_regulator_driver);
 210
 211 MODULE_AUTHOR("Mark Brown");
 212 MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator");
 213 MODULE_LICENSE("GPL");