kernel/drivers/mfd/da9063-i2c.c

   1 /* da9063-i2c.c: Interrupt support for Dialog DA9063
   2  *
   3  * Copyright 2012 Dialog Semiconductor Ltd.
   4  * Copyright 2013 Philipp Zabel, Pengutronix
   5  *
   6  * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
   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
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/i2c.h>
  18 #include <linux/regmap.h>
  19 #include <linux/delay.h>
  20 #include <linux/slab.h>
  21 #include <linux/err.h>
  22
  23 #include <linux/mfd/core.h>
  24 #include <linux/mfd/da9063/core.h>
  25 #include <linux/mfd/da9063/pdata.h>
  26 #include <linux/mfd/da9063/registers.h>
  27
  28 #include <linux/of.h>
  29 #include <linux/regulator/of_regulator.h>
  30
  31 static const struct regmap_range da9063_ad_readable_ranges[] = {
  32         {
  33                 .range_min = DA9063_REG_PAGE_CON,
  34                 .range_max = DA9063_AD_REG_SECOND_D,
  35         }, {
  36                 .range_min = DA9063_REG_SEQ,
  37                 .range_max = DA9063_REG_ID_32_31,
  38         }, {
  39                 .range_min = DA9063_REG_SEQ_A,
  40                 .range_max = DA9063_REG_AUTO3_LOW,
  41         }, {
  42                 .range_min = DA9063_REG_T_OFFSET,
  43                 .range_max = DA9063_AD_REG_GP_ID_19,
  44         }, {
  45                 .range_min = DA9063_REG_CHIP_ID,
  46                 .range_max = DA9063_REG_CHIP_VARIANT,
  47         },
  48 };
  49
  50 static const struct regmap_range da9063_ad_writeable_ranges[] = {
  51         {
  52                 .range_min = DA9063_REG_PAGE_CON,
  53                 .range_max = DA9063_REG_PAGE_CON,
  54         }, {
  55                 .range_min = DA9063_REG_FAULT_LOG,
  56                 .range_max = DA9063_REG_VSYS_MON,
  57         }, {
  58                 .range_min = DA9063_REG_COUNT_S,
  59                 .range_max = DA9063_AD_REG_ALARM_Y,
  60         }, {
  61                 .range_min = DA9063_REG_SEQ,
  62                 .range_max = DA9063_REG_ID_32_31,
  63         }, {
  64                 .range_min = DA9063_REG_SEQ_A,
  65                 .range_max = DA9063_REG_AUTO3_LOW,
  66         }, {
  67                 .range_min = DA9063_REG_CONFIG_I,
  68                 .range_max = DA9063_AD_REG_MON_REG_4,
  69         }, {
  70                 .range_min = DA9063_AD_REG_GP_ID_0,
  71                 .range_max = DA9063_AD_REG_GP_ID_19,
  72         },
  73 };
  74
  75 static const struct regmap_range da9063_ad_volatile_ranges[] = {
  76         {
  77                 .range_min = DA9063_REG_STATUS_A,
  78                 .range_max = DA9063_REG_EVENT_D,
  79         }, {
  80                 .range_min = DA9063_REG_CONTROL_F,
  81                 .range_max = DA9063_REG_CONTROL_F,
  82         }, {
  83                 .range_min = DA9063_REG_ADC_MAN,
  84                 .range_max = DA9063_REG_ADC_MAN,
  85         }, {
  86                 .range_min = DA9063_REG_ADC_RES_L,
  87                 .range_max = DA9063_AD_REG_SECOND_D,
  88         }, {
  89                 .range_min = DA9063_AD_REG_MON_REG_5,
  90                 .range_max = DA9063_AD_REG_MON_REG_6,
  91         },
  92 };
  93
  94 static const struct regmap_access_table da9063_ad_readable_table = {
  95         .yes_ranges = da9063_ad_readable_ranges,
  96         .n_yes_ranges = ARRAY_SIZE(da9063_ad_readable_ranges),
  97 };
  98
  99 static const struct regmap_access_table da9063_ad_writeable_table = {
 100         .yes_ranges = da9063_ad_writeable_ranges,
 101         .n_yes_ranges = ARRAY_SIZE(da9063_ad_writeable_ranges),
 102 };
 103
 104 static const struct regmap_access_table da9063_ad_volatile_table = {
 105         .yes_ranges = da9063_ad_volatile_ranges,
 106         .n_yes_ranges = ARRAY_SIZE(da9063_ad_volatile_ranges),
 107 };
 108
 109 static const struct regmap_range da9063_bb_readable_ranges[] = {
 110         {
 111                 .range_min = DA9063_REG_PAGE_CON,
 112                 .range_max = DA9063_BB_REG_SECOND_D,
 113         }, {
 114                 .range_min = DA9063_REG_SEQ,
 115                 .range_max = DA9063_REG_ID_32_31,
 116         }, {
 117                 .range_min = DA9063_REG_SEQ_A,
 118                 .range_max = DA9063_REG_AUTO3_LOW,
 119         }, {
 120                 .range_min = DA9063_REG_T_OFFSET,
 121                 .range_max = DA9063_BB_REG_GP_ID_19,
 122         }, {
 123                 .range_min = DA9063_REG_CHIP_ID,
 124                 .range_max = DA9063_REG_CHIP_VARIANT,
 125         },
 126 };
 127
 128 static const struct regmap_range da9063_bb_writeable_ranges[] = {
 129         {
 130                 .range_min = DA9063_REG_PAGE_CON,
 131                 .range_max = DA9063_REG_PAGE_CON,
 132         }, {
 133                 .range_min = DA9063_REG_FAULT_LOG,
 134                 .range_max = DA9063_REG_VSYS_MON,
 135         }, {
 136                 .range_min = DA9063_REG_COUNT_S,
 137                 .range_max = DA9063_BB_REG_ALARM_Y,
 138         }, {
 139                 .range_min = DA9063_REG_SEQ,
 140                 .range_max = DA9063_REG_ID_32_31,
 141         }, {
 142                 .range_min = DA9063_REG_SEQ_A,
 143                 .range_max = DA9063_REG_AUTO3_LOW,
 144         }, {
 145                 .range_min = DA9063_REG_CONFIG_I,
 146                 .range_max = DA9063_BB_REG_MON_REG_4,
 147         }, {
 148                 .range_min = DA9063_BB_REG_GP_ID_0,
 149                 .range_max = DA9063_BB_REG_GP_ID_19,
 150         },
 151 };
 152
 153 static const struct regmap_range da9063_bb_volatile_ranges[] = {
 154         {
 155                 .range_min = DA9063_REG_STATUS_A,
 156                 .range_max = DA9063_REG_EVENT_D,
 157         }, {
 158                 .range_min = DA9063_REG_CONTROL_F,
 159                 .range_max = DA9063_REG_CONTROL_F,
 160         }, {
 161                 .range_min = DA9063_REG_ADC_MAN,
 162                 .range_max = DA9063_REG_ADC_MAN,
 163         }, {
 164                 .range_min = DA9063_REG_ADC_RES_L,
 165                 .range_max = DA9063_BB_REG_SECOND_D,
 166         }, {
 167                 .range_min = DA9063_BB_REG_MON_REG_5,
 168                 .range_max = DA9063_BB_REG_MON_REG_6,
 169         },
 170 };
 171
 172 static const struct regmap_access_table da9063_bb_readable_table = {
 173         .yes_ranges = da9063_bb_readable_ranges,
 174         .n_yes_ranges = ARRAY_SIZE(da9063_bb_readable_ranges),
 175 };
 176
 177 static const struct regmap_access_table da9063_bb_writeable_table = {
 178         .yes_ranges = da9063_bb_writeable_ranges,
 179         .n_yes_ranges = ARRAY_SIZE(da9063_bb_writeable_ranges),
 180 };
 181
 182 static const struct regmap_access_table da9063_bb_volatile_table = {
 183         .yes_ranges = da9063_bb_volatile_ranges,
 184         .n_yes_ranges = ARRAY_SIZE(da9063_bb_volatile_ranges),
 185 };
 186
 187 static const struct regmap_range_cfg da9063_range_cfg[] = {
 188         {
 189                 .range_min = DA9063_REG_PAGE_CON,
 190                 .range_max = DA9063_REG_CHIP_VARIANT,
 191                 .selector_reg = DA9063_REG_PAGE_CON,
 192                 .selector_mask = 1 << DA9063_I2C_PAGE_SEL_SHIFT,
 193                 .selector_shift = DA9063_I2C_PAGE_SEL_SHIFT,
 194                 .window_start = 0,
 195                 .window_len = 256,
 196         }
 197 };
 198
 199 static struct regmap_config da9063_regmap_config = {
 200         .reg_bits = 8,
 201         .val_bits = 8,
 202         .ranges = da9063_range_cfg,
 203         .num_ranges = ARRAY_SIZE(da9063_range_cfg),
 204         .max_register = DA9063_REG_CHIP_VARIANT,
 205
 206         .cache_type = REGCACHE_RBTREE,
 207 };
 208
 209 static const struct of_device_id da9063_dt_ids[] = {
 210         { .compatible = "dlg,da9063", },
 211         { }
 212 };
 213 MODULE_DEVICE_TABLE(of, da9063_dt_ids);
 214 static int da9063_i2c_probe(struct i2c_client *i2c,
 215         const struct i2c_device_id *id)
 216 {
 217         struct da9063 *da9063;
 218         int ret;
 219
 220         da9063 = devm_kzalloc(&i2c->dev, sizeof(struct da9063), GFP_KERNEL);
 221         if (da9063 == NULL)
 222                 return -ENOMEM;
 223
 224         i2c_set_clientdata(i2c, da9063);
 225         da9063->dev = &i2c->dev;
 226         da9063->chip_irq = i2c->irq;
 227
 228         if (da9063->variant_code == PMIC_DA9063_AD) {
 229                 da9063_regmap_config.rd_table = &da9063_ad_readable_table;
 230                 da9063_regmap_config.wr_table = &da9063_ad_writeable_table;
 231                 da9063_regmap_config.volatile_table = &da9063_ad_volatile_table;
 232         } else {
 233                 da9063_regmap_config.rd_table = &da9063_bb_readable_table;
 234                 da9063_regmap_config.wr_table = &da9063_bb_writeable_table;
 235                 da9063_regmap_config.volatile_table = &da9063_bb_volatile_table;
 236         }
 237
 238         da9063->regmap = devm_regmap_init_i2c(i2c, &da9063_regmap_config);
 239         if (IS_ERR(da9063->regmap)) {
 240                 ret = PTR_ERR(da9063->regmap);
 241                 dev_err(da9063->dev, "Failed to allocate register map: %d\n",
 242                         ret);
 243                 return ret;
 244         }
 245
 246         return da9063_device_init(da9063, i2c->irq);
 247 }
 248
 249 static int da9063_i2c_remove(struct i2c_client *i2c)
 250 {
 251         struct da9063 *da9063 = i2c_get_clientdata(i2c);
 252
 253         da9063_device_exit(da9063);
 254
 255         return 0;
 256 }
 257
 258 static const struct i2c_device_id da9063_i2c_id[] = {
 259         {"da9063", PMIC_DA9063},
 260         {},
 261 };
 262 MODULE_DEVICE_TABLE(i2c, da9063_i2c_id);
 263
 264 static struct i2c_driver da9063_i2c_driver = {
 265         .driver = {
 266                 .name = "da9063",
 267                 .owner = THIS_MODULE,
 268                 .of_match_table = of_match_ptr(da9063_dt_ids),
 269         },
 270         .probe    = da9063_i2c_probe,
 271         .remove   = da9063_i2c_remove,
 272         .id_table = da9063_i2c_id,
 273 };
 274
 275 module_i2c_driver(da9063_i2c_driver);