linux/drivers/mfd/sec-core.c
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   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
  29static struct mfd_cell s5m8751_devs[] = {
  30        {
  31                .name = "s5m8751-pmic",
  32        }, {
  33                .name = "s5m-charger",
  34        }, {
  35                .name = "s5m8751-codec",
  36        },
  37};
  38
  39static struct mfd_cell s5m8763_devs[] = {
  40        {
  41                .name = "s5m8763-pmic",
  42        }, {
  43                .name = "s5m-rtc",
  44        }, {
  45                .name = "s5m-charger",
  46        },
  47};
  48
  49static struct mfd_cell s5m8767_devs[] = {
  50        {
  51                .name = "s5m8767-pmic",
  52        }, {
  53                .name = "s5m-rtc",
  54        },
  55};
  56
  57static struct mfd_cell s2mps11_devs[] = {
  58        {
  59                .name = "s2mps11-pmic",
  60        },
  61};
  62
  63int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest)
  64{
  65        return regmap_read(sec_pmic->regmap, reg, dest);
  66}
  67EXPORT_SYMBOL_GPL(sec_reg_read);
  68
  69int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
  70{
  71        return regmap_bulk_read(sec_pmic->regmap, reg, buf, count);
  72}
  73EXPORT_SYMBOL_GPL(sec_bulk_read);
  74
  75int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value)
  76{
  77        return regmap_write(sec_pmic->regmap, reg, value);
  78}
  79EXPORT_SYMBOL_GPL(sec_reg_write);
  80
  81int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
  82{
  83        return regmap_raw_write(sec_pmic->regmap, reg, buf, count);
  84}
  85EXPORT_SYMBOL_GPL(sec_bulk_write);
  86
  87int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask)
  88{
  89        return regmap_update_bits(sec_pmic->regmap, reg, mask, val);
  90}
  91EXPORT_SYMBOL_GPL(sec_reg_update);
  92
  93static struct regmap_config sec_regmap_config = {
  94        .reg_bits = 8,
  95        .val_bits = 8,
  96};
  97
  98static int sec_pmic_probe(struct i2c_client *i2c,
  99                            const struct i2c_device_id *id)
 100{
 101        struct sec_platform_data *pdata = i2c->dev.platform_data;
 102        struct sec_pmic_dev *sec_pmic;
 103        int ret;
 104
 105        sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
 106                                GFP_KERNEL);
 107        if (sec_pmic == NULL)
 108                return -ENOMEM;
 109
 110        i2c_set_clientdata(i2c, sec_pmic);
 111        sec_pmic->dev = &i2c->dev;
 112        sec_pmic->i2c = i2c;
 113        sec_pmic->irq = i2c->irq;
 114        sec_pmic->type = id->driver_data;
 115
 116        if (pdata) {
 117                sec_pmic->device_type = pdata->device_type;
 118                sec_pmic->ono = pdata->ono;
 119                sec_pmic->irq_base = pdata->irq_base;
 120                sec_pmic->wakeup = pdata->wakeup;
 121        }
 122
 123        sec_pmic->regmap = devm_regmap_init_i2c(i2c, &sec_regmap_config);
 124        if (IS_ERR(sec_pmic->regmap)) {
 125                ret = PTR_ERR(sec_pmic->regmap);
 126                dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 127                        ret);
 128                return ret;
 129        }
 130
 131        sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
 132        i2c_set_clientdata(sec_pmic->rtc, sec_pmic);
 133
 134        if (pdata && pdata->cfg_pmic_irq)
 135                pdata->cfg_pmic_irq();
 136
 137        sec_irq_init(sec_pmic);
 138
 139        pm_runtime_set_active(sec_pmic->dev);
 140
 141        switch (sec_pmic->device_type) {
 142        case S5M8751X:
 143                ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs,
 144                                      ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL);
 145                break;
 146        case S5M8763X:
 147                ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs,
 148                                      ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL);
 149                break;
 150        case S5M8767X:
 151                ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs,
 152                                      ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL);
 153                break;
 154        case S2MPS11X:
 155                ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs,
 156                                      ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL);
 157                break;
 158        default:
 159                /* If this happens the probe function is problem */
 160                BUG();
 161        }
 162
 163        if (ret < 0)
 164                goto err;
 165
 166        return ret;
 167
 168err:
 169        mfd_remove_devices(sec_pmic->dev);
 170        sec_irq_exit(sec_pmic);
 171        i2c_unregister_device(sec_pmic->rtc);
 172        return ret;
 173}
 174
 175static int sec_pmic_remove(struct i2c_client *i2c)
 176{
 177        struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
 178
 179        mfd_remove_devices(sec_pmic->dev);
 180        sec_irq_exit(sec_pmic);
 181        i2c_unregister_device(sec_pmic->rtc);
 182        return 0;
 183}
 184
 185static const struct i2c_device_id sec_pmic_id[] = {
 186        { "sec_pmic", 0 },
 187        { }
 188};
 189MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
 190
 191static struct i2c_driver sec_pmic_driver = {
 192        .driver = {
 193                   .name = "sec_pmic",
 194                   .owner = THIS_MODULE,
 195        },
 196        .probe = sec_pmic_probe,
 197        .remove = sec_pmic_remove,
 198        .id_table = sec_pmic_id,
 199};
 200
 201static int __init sec_pmic_init(void)
 202{
 203        return i2c_add_driver(&sec_pmic_driver);
 204}
 205
 206subsys_initcall(sec_pmic_init);
 207
 208static void __exit sec_pmic_exit(void)
 209{
 210        i2c_del_driver(&sec_pmic_driver);
 211}
 212module_exit(sec_pmic_exit);
 213
 214MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 215MODULE_DESCRIPTION("Core support for the S5M MFD");
 216MODULE_LICENSE("GPL");
 217
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