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         },
  88         [ISL9305_DCD2] = {
  89                 .name =         "DCD2",
  90                 .of_match =     of_match_ptr("dcd2"),
  91                 .regulators_node = of_match_ptr("regulators"),
  92                 .n_voltages =   0x70,
  93                 .min_uV =       825000,
  94                 .uV_step =      25000,
  95                 .vsel_reg =     ISL9305_DCD2OUT,
  96                 .vsel_mask =    0x7f,
  97                 .enable_reg =   ISL9305_SYSTEM_PARAMETER,
  98                 .enable_mask =  ISL9305_DCD2_EN,
  99                 .supply_name =  "VINDCD2",
 100                 .ops =          &isl9305_ops,
 101         },
 102         [ISL9305_LDO1] = {
 103                 .name =         "LDO1",
 104                 .of_match =     of_match_ptr("ldo1"),
 105                 .regulators_node = of_match_ptr("regulators"),
 106                 .n_voltages =   0x37,
 107                 .min_uV =       900000,
 108                 .uV_step =      50000,
 109                 .vsel_reg =     ISL9305_LDO1OUT,
 110                 .vsel_mask =    0x3f,
 111                 .enable_reg =   ISL9305_SYSTEM_PARAMETER,
 112                 .enable_mask =  ISL9305_LDO1_EN,
 113                 .supply_name =  "VINLDO1",
 114                 .ops =          &isl9305_ops,
 115         },
 116         [ISL9305_LDO2] = {
 117                 .name =         "LDO2",
 118                 .of_match =     of_match_ptr("ldo2"),
 119                 .regulators_node = of_match_ptr("regulators"),
 120                 .n_voltages =   0x37,
 121                 .min_uV =       900000,
 122                 .uV_step =      50000,
 123                 .vsel_reg =     ISL9305_LDO2OUT,
 124                 .vsel_mask =    0x3f,
 125                 .enable_reg =   ISL9305_SYSTEM_PARAMETER,
 126                 .enable_mask =  ISL9305_LDO2_EN,
 127                 .supply_name =  "VINLDO2",
 128                 .ops =          &isl9305_ops,
 129         },
 130 };
 131
 132 static const struct regmap_config isl9305_regmap = {
 133         .reg_bits = 8,
 134         .val_bits = 8,
 135
 136         .max_register = ISL9305_MAX_REG,
 137         .cache_type = REGCACHE_RBTREE,
 138 };
 139
 140 static int isl9305_i2c_probe(struct i2c_client *i2c,
 141                              const struct i2c_device_id *id)
 142 {
 143         struct regulator_config config = { };
 144         struct isl9305_pdata *pdata = i2c->dev.platform_data;
 145         struct regulator_dev *rdev;
 146         struct regmap *regmap;
 147         int i, ret;
 148
 149         regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap);
 150         if (IS_ERR(regmap)) {
 151                 ret = PTR_ERR(regmap);
 152                 dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
 153                 return ret;
 154         }
 155
 156         config.dev = &i2c->dev;
 157
 158         for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) {
 159                 if (pdata)
 160                         config.init_data = pdata->init_data[i];
 161                 else
 162                         config.init_data = NULL;
 163
 164                 rdev = devm_regulator_register(&i2c->dev,
 165                                                &isl9305_regulators[i],
 166                                                &config);
 167                 if (IS_ERR(rdev)) {
 168                         ret = PTR_ERR(rdev);
 169                         dev_err(&i2c->dev, "Failed to register %s: %d\n",
 170                                 isl9305_regulators[i].name, ret);
 171                         return ret;
 172                 }
 173         }
 174
 175         return 0;
 176 }
 177
 178 #ifdef CONFIG_OF
 179 static const struct of_device_id isl9305_dt_ids[] = {
 180         { .compatible = "isl,isl9305" }, /* for backward compat., don't use */
 181         { .compatible = "isil,isl9305" },
 182         { .compatible = "isl,isl9305h" }, /* for backward compat., don't use */
 183         { .compatible = "isil,isl9305h" },
 184         {},
 185 };
 186 MODULE_DEVICE_TABLE(of, isl9305_dt_ids);
 187 #endif
 188
 189 static const struct i2c_device_id isl9305_i2c_id[] = {
 190         { "isl9305", },
 191         { "isl9305h", },
 192         { }
 193 };
 194 MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id);
 195
 196 static struct i2c_driver isl9305_regulator_driver = {
 197         .driver = {
 198                 .name = "isl9305",
 199                 .of_match_table = of_match_ptr(isl9305_dt_ids),
 200         },
 201         .probe = isl9305_i2c_probe,
 202         .id_table = isl9305_i2c_id,
 203 };
 204
 205 module_i2c_driver(isl9305_regulator_driver);
 206
 207 MODULE_AUTHOR("Mark Brown");
 208 MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator");
 209 MODULE_LICENSE("GPL");