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