drivers/mfd/s5m-core.c

   1 /*
   2  * s5m87xx.c
   3  *
   4  * Copyright (c) 2011 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/s5m87xx/s5m-core.h>
  25 #include <linux/mfd/s5m87xx/s5m-pmic.h>
  26 #include <linux/mfd/s5m87xx/s5m-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 s5m_reg_read(struct s5m87xx_dev *s5m87xx, u8 reg, void *dest)
  58 {
  59         return regmap_read(s5m87xx->regmap, reg, dest);
  60 }
  61 EXPORT_SYMBOL_GPL(s5m_reg_read);
  62
  63 int s5m_bulk_read(struct s5m87xx_dev *s5m87xx, u8 reg, int count, u8 *buf)
  64 {
  65         return regmap_bulk_read(s5m87xx->regmap, reg, buf, count);
  66 }
  67 EXPORT_SYMBOL_GPL(s5m_bulk_read);
  68
  69 int s5m_reg_write(struct s5m87xx_dev *s5m87xx, u8 reg, u8 value)
  70 {
  71         return regmap_write(s5m87xx->regmap, reg, value);
  72 }
  73 EXPORT_SYMBOL_GPL(s5m_reg_write);
  74
  75 int s5m_bulk_write(struct s5m87xx_dev *s5m87xx, u8 reg, int count, u8 *buf)
  76 {
  77         return regmap_raw_write(s5m87xx->regmap, reg, buf, count);
  78 }
  79 EXPORT_SYMBOL_GPL(s5m_bulk_write);
  80
  81 int s5m_reg_update(struct s5m87xx_dev *s5m87xx, u8 reg, u8 val, u8 mask)
  82 {
  83         return regmap_update_bits(s5m87xx->regmap, reg, mask, val);
  84 }
  85 EXPORT_SYMBOL_GPL(s5m_reg_update);
  86
  87 static struct regmap_config s5m_regmap_config = {
  88         .reg_bits = 8,
  89         .val_bits = 8,
  90 };
  91
  92 static int s5m87xx_i2c_probe(struct i2c_client *i2c,
  93                             const struct i2c_device_id *id)
  94 {
  95         struct s5m_platform_data *pdata = i2c->dev.platform_data;
  96         struct s5m87xx_dev *s5m87xx;
  97         int ret;
  98
  99         s5m87xx = devm_kzalloc(&i2c->dev, sizeof(struct s5m87xx_dev),
 100                                 GFP_KERNEL);
 101         if (s5m87xx == NULL)
 102                 return -ENOMEM;
 103
 104         i2c_set_clientdata(i2c, s5m87xx);
 105         s5m87xx->dev = &i2c->dev;
 106         s5m87xx->i2c = i2c;
 107         s5m87xx->irq = i2c->irq;
 108         s5m87xx->type = id->driver_data;
 109
 110         if (pdata) {
 111                 s5m87xx->device_type = pdata->device_type;
 112                 s5m87xx->ono = pdata->ono;
 113                 s5m87xx->irq_base = pdata->irq_base;
 114                 s5m87xx->wakeup = pdata->wakeup;
 115         }
 116
 117         s5m87xx->regmap = regmap_init_i2c(i2c, &s5m_regmap_config);
 118         if (IS_ERR(s5m87xx->regmap)) {
 119                 ret = PTR_ERR(s5m87xx->regmap);
 120                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 121                         ret);
 122                 goto err;
 123         }
 124
 125         s5m87xx->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
 126         i2c_set_clientdata(s5m87xx->rtc, s5m87xx);
 127
 128         if (pdata && pdata->cfg_pmic_irq)
 129                 pdata->cfg_pmic_irq();
 130
 131         s5m_irq_init(s5m87xx);
 132
 133         pm_runtime_set_active(s5m87xx->dev);
 134
 135         switch (s5m87xx->device_type) {
 136         case S5M8751X:
 137                 ret = mfd_add_devices(s5m87xx->dev, -1, s5m8751_devs,
 138                                         ARRAY_SIZE(s5m8751_devs), NULL, 0);
 139                 break;
 140         case S5M8763X:
 141                 ret = mfd_add_devices(s5m87xx->dev, -1, s5m8763_devs,
 142                                         ARRAY_SIZE(s5m8763_devs), NULL, 0);
 143                 break;
 144         case S5M8767X:
 145                 ret = mfd_add_devices(s5m87xx->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(s5m87xx->dev);
 160         s5m_irq_exit(s5m87xx);
 161         i2c_unregister_device(s5m87xx->rtc);
 162         regmap_exit(s5m87xx->regmap);
 163         return ret;
 164 }
 165
 166 static int s5m87xx_i2c_remove(struct i2c_client *i2c)
 167 {
 168         struct s5m87xx_dev *s5m87xx = i2c_get_clientdata(i2c);
 169
 170         mfd_remove_devices(s5m87xx->dev);
 171         s5m_irq_exit(s5m87xx);
 172         i2c_unregister_device(s5m87xx->rtc);
 173         regmap_exit(s5m87xx->regmap);
 174         return 0;
 175 }
 176
 177 static const struct i2c_device_id s5m87xx_i2c_id[] = {
 178         { "s5m87xx", 0 },
 179         { }
 180 };
 181 MODULE_DEVICE_TABLE(i2c, s5m87xx_i2c_id);
 182
 183 static struct i2c_driver s5m87xx_i2c_driver = {
 184         .driver = {
 185                    .name = "s5m87xx",
 186                    .owner = THIS_MODULE,
 187         },
 188         .probe = s5m87xx_i2c_probe,
 189         .remove = s5m87xx_i2c_remove,
 190         .id_table = s5m87xx_i2c_id,
 191 };
 192
 193 static int __init s5m87xx_i2c_init(void)
 194 {
 195         return i2c_add_driver(&s5m87xx_i2c_driver);
 196 }
 197
 198 subsys_initcall(s5m87xx_i2c_init);
 199
 200 static void __exit s5m87xx_i2c_exit(void)
 201 {
 202         i2c_del_driver(&s5m87xx_i2c_driver);
 203 }
 204 module_exit(s5m87xx_i2c_exit);
 205
 206 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 207 MODULE_DESCRIPTION("Core support for the S5M MFD");
 208 MODULE_LICENSE("GPL");