linux/drivers/mfd/stmpe-i2c.c
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   1/*
   2 * ST Microelectronics MFD: stmpe's i2c client specific driver
   3 *
   4 * Copyright (C) ST-Ericsson SA 2010
   5 * Copyright (C) ST Microelectronics SA 2011
   6 *
   7 * License Terms: GNU General Public License, version 2
   8 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
   9 * Author: Viresh Kumar <viresh.linux@gmail.com> for ST Microelectronics
  10 */
  11
  12#include <linux/i2c.h>
  13#include <linux/interrupt.h>
  14#include <linux/kernel.h>
  15#include <linux/module.h>
  16#include <linux/types.h>
  17#include "stmpe.h"
  18
  19static int i2c_reg_read(struct stmpe *stmpe, u8 reg)
  20{
  21        struct i2c_client *i2c = stmpe->client;
  22
  23        return i2c_smbus_read_byte_data(i2c, reg);
  24}
  25
  26static int i2c_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
  27{
  28        struct i2c_client *i2c = stmpe->client;
  29
  30        return i2c_smbus_write_byte_data(i2c, reg, val);
  31}
  32
  33static int i2c_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values)
  34{
  35        struct i2c_client *i2c = stmpe->client;
  36
  37        return i2c_smbus_read_i2c_block_data(i2c, reg, length, values);
  38}
  39
  40static int i2c_block_write(struct stmpe *stmpe, u8 reg, u8 length,
  41                const u8 *values)
  42{
  43        struct i2c_client *i2c = stmpe->client;
  44
  45        return i2c_smbus_write_i2c_block_data(i2c, reg, length, values);
  46}
  47
  48static struct stmpe_client_info i2c_ci = {
  49        .read_byte = i2c_reg_read,
  50        .write_byte = i2c_reg_write,
  51        .read_block = i2c_block_read,
  52        .write_block = i2c_block_write,
  53};
  54
  55static int __devinit
  56stmpe_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
  57{
  58        i2c_ci.data = (void *)id;
  59        i2c_ci.irq = i2c->irq;
  60        i2c_ci.client = i2c;
  61        i2c_ci.dev = &i2c->dev;
  62
  63        return stmpe_probe(&i2c_ci, id->driver_data);
  64}
  65
  66static int __devexit stmpe_i2c_remove(struct i2c_client *i2c)
  67{
  68        struct stmpe *stmpe = dev_get_drvdata(&i2c->dev);
  69
  70        return stmpe_remove(stmpe);
  71}
  72
  73static const struct i2c_device_id stmpe_i2c_id[] = {
  74        { "stmpe610", STMPE610 },
  75        { "stmpe801", STMPE801 },
  76        { "stmpe811", STMPE811 },
  77        { "stmpe1601", STMPE1601 },
  78        { "stmpe2401", STMPE2401 },
  79        { "stmpe2403", STMPE2403 },
  80        { }
  81};
  82MODULE_DEVICE_TABLE(i2c, stmpe_id);
  83
  84static struct i2c_driver stmpe_i2c_driver = {
  85        .driver.name    = "stmpe-i2c",
  86        .driver.owner   = THIS_MODULE,
  87#ifdef CONFIG_PM
  88        .driver.pm      = &stmpe_dev_pm_ops,
  89#endif
  90        .probe          = stmpe_i2c_probe,
  91        .remove         = __devexit_p(stmpe_i2c_remove),
  92        .id_table       = stmpe_i2c_id,
  93};
  94
  95static int __init stmpe_init(void)
  96{
  97        return i2c_add_driver(&stmpe_i2c_driver);
  98}
  99subsys_initcall(stmpe_init);
 100
 101static void __exit stmpe_exit(void)
 102{
 103        i2c_del_driver(&stmpe_i2c_driver);
 104}
 105module_exit(stmpe_exit);
 106
 107MODULE_LICENSE("GPL v2");
 108MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver");
 109MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");
 110
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