drivers/mfd/sec-core.c

   1 /*
   2  * sec-core.c
   3  *
   4  * Copyright (c) 2012 Samsung Electronics Co., Ltd
   5  *              http://www.samsung.com
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/init.h>
  17 #include <linux/err.h>
  18 #include <linux/slab.h>
  19 #include <linux/i2c.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/pm_runtime.h>
  22 #include <linux/mutex.h>
  23 #include <linux/mfd/core.h>
  24 #include <linux/mfd/samsung/core.h>
  25 #include <linux/mfd/samsung/irq.h>
  26 #include <linux/mfd/samsung/rtc.h>
  27 #include <linux/regmap.h>
  28
  29 static struct mfd_cell s5m8751_devs[] = {
  30         {
  31                 .name = "s5m8751-pmic",
  32         }, {
  33                 .name = "s5m-charger",
  34         }, {
  35                 .name = "s5m8751-codec",
  36         },
  37 };
  38
  39 static struct mfd_cell s5m8763_devs[] = {
  40         {
  41                 .name = "s5m8763-pmic",
  42         }, {
  43                 .name = "s5m-rtc",
  44         }, {
  45                 .name = "s5m-charger",
  46         },
  47 };
  48
  49 static struct mfd_cell s5m8767_devs[] = {
  50         {
  51                 .name = "s5m8767-pmic",
  52         }, {
  53                 .name = "s5m-rtc",
  54         },
  55 };
  56
  57 int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest)
  58 {
  59         return regmap_read(sec_pmic->regmap, reg, dest);
  60 }
  61 EXPORT_SYMBOL_GPL(sec_reg_read);
  62
  63 int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
  64 {
  65         return regmap_bulk_read(sec_pmic->regmap, reg, buf, count);
  66 }
  67 EXPORT_SYMBOL_GPL(sec_bulk_read);
  68
  69 int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value)
  70 {
  71         return regmap_write(sec_pmic->regmap, reg, value);
  72 }
  73 EXPORT_SYMBOL_GPL(sec_reg_write);
  74
  75 int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
  76 {
  77         return regmap_raw_write(sec_pmic->regmap, reg, buf, count);
  78 }
  79 EXPORT_SYMBOL_GPL(sec_bulk_write);
  80
  81 int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask)
  82 {
  83         return regmap_update_bits(sec_pmic->regmap, reg, mask, val);
  84 }
  85 EXPORT_SYMBOL_GPL(sec_reg_update);
  86
  87 static struct regmap_config sec_regmap_config = {
  88         .reg_bits = 8,
  89         .val_bits = 8,
  90 };
  91
  92 static int sec_pmic_probe(struct i2c_client *i2c,
  93                             const struct i2c_device_id *id)
  94 {
  95         struct sec_platform_data *pdata = i2c->dev.platform_data;
  96         struct sec_pmic_dev *sec_pmic;
  97         int ret;
  98
  99         sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
 100                                 GFP_KERNEL);
 101         if (sec_pmic == NULL)
 102                 return -ENOMEM;
 103
 104         i2c_set_clientdata(i2c, sec_pmic);
 105         sec_pmic->dev = &i2c->dev;
 106         sec_pmic->i2c = i2c;
 107         sec_pmic->irq = i2c->irq;
 108         sec_pmic->type = id->driver_data;
 109
 110         if (pdata) {
 111                 sec_pmic->device_type = pdata->device_type;
 112                 sec_pmic->ono = pdata->ono;
 113                 sec_pmic->irq_base = pdata->irq_base;
 114                 sec_pmic->wakeup = pdata->wakeup;
 115         }
 116
 117         sec_pmic->regmap = devm_regmap_init_i2c(i2c, &sec_regmap_config);
 118         if (IS_ERR(sec_pmic->regmap)) {
 119                 ret = PTR_ERR(sec_pmic->regmap);
 120                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 121                         ret);
 122                 return ret;
 123         }
 124
 125         sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
 126         i2c_set_clientdata(sec_pmic->rtc, sec_pmic);
 127
 128         if (pdata && pdata->cfg_pmic_irq)
 129                 pdata->cfg_pmic_irq();
 130
 131         sec_irq_init(sec_pmic);
 132
 133         pm_runtime_set_active(sec_pmic->dev);
 134
 135         switch (sec_pmic->device_type) {
 136         case S5M8751X:
 137                 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs,
 138                                         ARRAY_SIZE(s5m8751_devs), NULL, 0);
 139                 break;
 140         case S5M8763X:
 141                 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs,
 142                                         ARRAY_SIZE(s5m8763_devs), NULL, 0);
 143                 break;
 144         case S5M8767X:
 145                 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs,
 146                                         ARRAY_SIZE(s5m8767_devs), NULL, 0);
 147                 break;
 148         default:
 149                 /* If this happens the probe function is problem */
 150                 BUG();
 151         }
 152
 153         if (ret < 0)
 154                 goto err;
 155
 156         return ret;
 157
 158 err:
 159         mfd_remove_devices(sec_pmic->dev);
 160         sec_irq_exit(sec_pmic);
 161         i2c_unregister_device(sec_pmic->rtc);
 162         return ret;
 163 }
 164
 165 static int sec_pmic_remove(struct i2c_client *i2c)
 166 {
 167         struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
 168
 169         mfd_remove_devices(sec_pmic->dev);
 170         sec_irq_exit(sec_pmic);
 171         i2c_unregister_device(sec_pmic->rtc);
 172         return 0;
 173 }
 174
 175 static const struct i2c_device_id sec_pmic_id[] = {
 176         { "sec_pmic", 0 },
 177         { }
 178 };
 179 MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
 180
 181 static struct i2c_driver sec_pmic_driver = {
 182         .driver = {
 183                    .name = "sec_pmic",
 184                    .owner = THIS_MODULE,
 185         },
 186         .probe = sec_pmic_probe,
 187         .remove = sec_pmic_remove,
 188         .id_table = sec_pmic_id,
 189 };
 190
 191 static int __init sec_pmic_init(void)
 192 {
 193         return i2c_add_driver(&sec_pmic_driver);
 194 }
 195
 196 subsys_initcall(sec_pmic_init);
 197
 198 static void __exit sec_pmic_exit(void)
 199 {
 200         i2c_del_driver(&sec_pmic_driver);
 201 }
 202 module_exit(sec_pmic_exit);
 203
 204 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 205 MODULE_DESCRIPTION("Core support for the S5M MFD");
 206 MODULE_LICENSE("GPL");