drivers/regulator/isl9305.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * isl9305 - Intersil ISL9305 DCDC regulator
   4  *
   5  * Copyright 2014 Linaro Ltd
   6  *
   7  * Author: Mark Brown <broonie@kernel.org>
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/err.h>
  12 #include <linux/i2c.h>
  13 #include <linux/of.h>
  14 #include <linux/platform_data/isl9305.h>
  15 #include <linux/regmap.h>
  16 #include <linux/regulator/driver.h>
  17 #include <linux/regulator/of_regulator.h>
  18 #include <linux/slab.h>
  19
  20 /*
  21  * Registers
  22  */
  23 #define ISL9305_DCD1OUT          0x0
  24 #define ISL9305_DCD2OUT          0x1
  25 #define ISL9305_LDO1OUT          0x2
  26 #define ISL9305_LDO2OUT          0x3
  27 #define ISL9305_DCD_PARAMETER    0x4
  28 #define ISL9305_SYSTEM_PARAMETER 0x5
  29 #define ISL9305_DCD_SRCTL        0x6
  30
  31 #define ISL9305_MAX_REG ISL9305_DCD_SRCTL
  32
  33 /*
  34  * DCD_PARAMETER
  35  */
  36 #define ISL9305_DCD_PHASE   0x40
  37 #define ISL9305_DCD2_ULTRA  0x20
  38 #define ISL9305_DCD1_ULTRA  0x10
  39 #define ISL9305_DCD2_BLD    0x08
  40 #define ISL9305_DCD1_BLD    0x04
  41 #define ISL9305_DCD2_MODE   0x02
  42 #define ISL9305_DCD1_MODE   0x01
  43
  44 /*
  45  * SYSTEM_PARAMETER
  46  */
  47 #define ISL9305_I2C_EN      0x40
  48 #define ISL9305_DCDPOR_MASK 0x30
  49 #define ISL9305_LDO2_EN     0x08
  50 #define ISL9305_LDO1_EN     0x04
  51 #define ISL9305_DCD2_EN     0x02
  52 #define ISL9305_DCD1_EN     0x01
  53
  54 /*
  55  * DCD_SRCTL
  56  */
  57 #define ISL9305_DCD2SR_MASK 0xc0
  58 #define ISL9305_DCD1SR_MASK 0x07
  59
  60 static const struct regulator_ops isl9305_ops = {
  61         .enable = regulator_enable_regmap,
  62         .disable = regulator_disable_regmap,
  63         .is_enabled = regulator_is_enabled_regmap,
  64         .list_voltage = regulator_list_voltage_linear,
  65         .get_voltage_sel = regulator_get_voltage_sel_regmap,
  66         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  67 };
  68
  69 static const struct regulator_desc isl9305_regulators[] = {
  70         [ISL9305_DCD1] = {
  71                 .name =         "DCD1",
  72                 .of_match =     of_match_ptr("dcd1"),
  73                 .regulators_node = of_match_ptr("regulators"),
  74                 .n_voltages =   0x70,
  75                 .min_uV =       825000,
  76                 .uV_step =      25000,
  77                 .vsel_reg =     ISL9305_DCD1OUT,
  78                 .vsel_mask =    0x7f,
  79                 .enable_reg =   ISL9305_SYSTEM_PARAMETER,
  80                 .enable_mask =  ISL9305_DCD1_EN,
  81                 .supply_name =  "VINDCD1",
  82                 .ops =          &isl9305_ops,
  83                 .owner =        THIS_MODULE,
  84         },
  85         [ISL9305_DCD2] = {
  86                 .name =         "DCD2",
  87                 .of_match =     of_match_ptr("dcd2"),
  88                 .regulators_node = of_match_ptr("regulators"),
  89                 .n_voltages =   0x70,
  90                 .min_uV =       825000,
  91                 .uV_step =      25000,
  92                 .vsel_reg =     ISL9305_DCD2OUT,
  93                 .vsel_mask =    0x7f,
  94                 .enable_reg =   ISL9305_SYSTEM_PARAMETER,
  95                 .enable_mask =  ISL9305_DCD2_EN,
  96                 .supply_name =  "VINDCD2",
  97                 .ops =          &isl9305_ops,
  98                 .owner =        THIS_MODULE,
  99         },
 100         [ISL9305_LDO1] = {
 101                 .name =         "LDO1",
 102                 .of_match =     of_match_ptr("ldo1"),
 103                 .regulators_node = of_match_ptr("regulators"),
 104                 .n_voltages =   0x37,
 105                 .min_uV =       900000,
 106                 .uV_step =      50000,
 107                 .vsel_reg =     ISL9305_LDO1OUT,
 108                 .vsel_mask =    0x3f,
 109                 .enable_reg =   ISL9305_SYSTEM_PARAMETER,
 110                 .enable_mask =  ISL9305_LDO1_EN,
 111                 .supply_name =  "VINLDO1",
 112                 .ops =          &isl9305_ops,
 113                 .owner =        THIS_MODULE,
 114         },
 115         [ISL9305_LDO2] = {
 116                 .name =         "LDO2",
 117                 .of_match =     of_match_ptr("ldo2"),
 118                 .regulators_node = of_match_ptr("regulators"),
 119                 .n_voltages =   0x37,
 120                 .min_uV =       900000,
 121                 .uV_step =      50000,
 122                 .vsel_reg =     ISL9305_LDO2OUT,
 123                 .vsel_mask =    0x3f,
 124                 .enable_reg =   ISL9305_SYSTEM_PARAMETER,
 125                 .enable_mask =  ISL9305_LDO2_EN,
 126                 .supply_name =  "VINLDO2",
 127                 .ops =          &isl9305_ops,
 128                 .owner =        THIS_MODULE,
 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_MAPLE,
 138 };
 139
 140 static int isl9305_i2c_probe(struct i2c_client *i2c)
 141 {
 142         struct regulator_config config = { };
 143         struct isl9305_pdata *pdata = i2c->dev.platform_data;
 144         struct regulator_dev *rdev;
 145         struct regmap *regmap;
 146         int i, ret;
 147
 148         regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap);
 149         if (IS_ERR(regmap)) {
 150                 ret = PTR_ERR(regmap);
 151                 dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
 152                 return ret;
 153         }
 154
 155         config.dev = &i2c->dev;
 156
 157         for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) {
 158                 if (pdata)
 159                         config.init_data = pdata->init_data[i];
 160                 else
 161                         config.init_data = NULL;
 162
 163                 rdev = devm_regulator_register(&i2c->dev,
 164                                                &isl9305_regulators[i],
 165                                                &config);
 166                 if (IS_ERR(rdev)) {
 167                         ret = PTR_ERR(rdev);
 168                         dev_err(&i2c->dev, "Failed to register %s: %d\n",
 169                                 isl9305_regulators[i].name, ret);
 170                         return ret;
 171                 }
 172         }
 173
 174         return 0;
 175 }
 176
 177 #ifdef CONFIG_OF
 178 static const struct of_device_id isl9305_dt_ids[] = {
 179         { .compatible = "isl,isl9305" }, /* for backward compat., don't use */
 180         { .compatible = "isil,isl9305" },
 181         { .compatible = "isl,isl9305h" }, /* for backward compat., don't use */
 182         { .compatible = "isil,isl9305h" },
 183         {},
 184 };
 185 MODULE_DEVICE_TABLE(of, isl9305_dt_ids);
 186 #endif
 187
 188 static const struct i2c_device_id isl9305_i2c_id[] = {
 189         { "isl9305", },
 190         { "isl9305h", },
 191         { }
 192 };
 193 MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id);
 194
 195 static struct i2c_driver isl9305_regulator_driver = {
 196         .driver = {
 197                 .name = "isl9305",
 198                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 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");