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_readable_ranges[] = {
  29         {
  30                 .range_min = DA9063_REG_PAGE_CON,
  31                 .range_max = DA9063_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_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_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_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_REG_MON_REG_4,
  66         }, {
  67                 .range_min = DA9063_REG_GP_ID_0,
  68                 .range_max = DA9063_REG_GP_ID_19,
  69         },
  70 };
  71
  72 static const struct regmap_range da9063_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_REG_SECOND_D,
  85         }, {
  86                 .range_min = DA9063_REG_MON_REG_5,
  87                 .range_max = DA9063_REG_MON_REG_6,
  88         },
  89 };
  90
  91 static const struct regmap_access_table da9063_readable_table = {
  92         .yes_ranges = da9063_readable_ranges,
  93         .n_yes_ranges = ARRAY_SIZE(da9063_readable_ranges),
  94 };
  95
  96 static const struct regmap_access_table da9063_writeable_table = {
  97         .yes_ranges = da9063_writeable_ranges,
  98         .n_yes_ranges = ARRAY_SIZE(da9063_writeable_ranges),
  99 };
 100
 101 static const struct regmap_access_table da9063_volatile_table = {
 102         .yes_ranges = da9063_volatile_ranges,
 103         .n_yes_ranges = ARRAY_SIZE(da9063_volatile_ranges),
 104 };
 105
 106 static const struct regmap_range_cfg da9063_range_cfg[] = {
 107         {
 108                 .range_min = DA9063_REG_PAGE_CON,
 109                 .range_max = DA9063_REG_CHIP_VARIANT,
 110                 .selector_reg = DA9063_REG_PAGE_CON,
 111                 .selector_mask = 1 << DA9063_I2C_PAGE_SEL_SHIFT,
 112                 .selector_shift = DA9063_I2C_PAGE_SEL_SHIFT,
 113                 .window_start = 0,
 114                 .window_len = 256,
 115         }
 116 };
 117
 118 static struct regmap_config da9063_regmap_config = {
 119         .reg_bits = 8,
 120         .val_bits = 8,
 121         .ranges = da9063_range_cfg,
 122         .num_ranges = ARRAY_SIZE(da9063_range_cfg),
 123         .max_register = DA9063_REG_CHIP_VARIANT,
 124
 125         .cache_type = REGCACHE_RBTREE,
 126
 127         .rd_table = &da9063_readable_table,
 128         .wr_table = &da9063_writeable_table,
 129         .volatile_table = &da9063_volatile_table,
 130 };
 131
 132 static int da9063_i2c_probe(struct i2c_client *i2c,
 133         const struct i2c_device_id *id)
 134 {
 135         struct da9063 *da9063;
 136         int ret;
 137
 138         da9063 = devm_kzalloc(&i2c->dev, sizeof(struct da9063), GFP_KERNEL);
 139         if (da9063 == NULL)
 140                 return -ENOMEM;
 141
 142         i2c_set_clientdata(i2c, da9063);
 143         da9063->dev = &i2c->dev;
 144         da9063->chip_irq = i2c->irq;
 145
 146         da9063->regmap = devm_regmap_init_i2c(i2c, &da9063_regmap_config);
 147         if (IS_ERR(da9063->regmap)) {
 148                 ret = PTR_ERR(da9063->regmap);
 149                 dev_err(da9063->dev, "Failed to allocate register map: %d\n",
 150                         ret);
 151                 return ret;
 152         }
 153
 154         return da9063_device_init(da9063, i2c->irq);
 155 }
 156
 157 static int da9063_i2c_remove(struct i2c_client *i2c)
 158 {
 159         struct da9063 *da9063 = i2c_get_clientdata(i2c);
 160
 161         da9063_device_exit(da9063);
 162
 163         return 0;
 164 }
 165
 166 static const struct i2c_device_id da9063_i2c_id[] = {
 167         {"da9063", PMIC_DA9063},
 168         {},
 169 };
 170 MODULE_DEVICE_TABLE(i2c, da9063_i2c_id);
 171
 172 static struct i2c_driver da9063_i2c_driver = {
 173         .driver = {
 174                 .name = "da9063",
 175                 .owner = THIS_MODULE,
 176         },
 177         .probe    = da9063_i2c_probe,
 178         .remove   = da9063_i2c_remove,
 179         .id_table = da9063_i2c_id,
 180 };
 181
 182 module_i2c_driver(da9063_i2c_driver);