drivers/mfd/stmpe-i2c.c

   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
  19 static 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
  26 static 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
  33 static 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
  40 static 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
  48 static 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
  55 static int
  56 stmpe_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
  66 static int 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
  73 static const struct i2c_device_id stmpe_i2c_id[] = {
  74         { "stmpe610", STMPE610 },
  75         { "stmpe801", STMPE801 },
  76         { "stmpe811", STMPE811 },
  77         { "stmpe1601", STMPE1601 },
  78         { "stmpe1801", STMPE1801 },
  79         { "stmpe2401", STMPE2401 },
  80         { "stmpe2403", STMPE2403 },
  81         { }
  82 };
  83 MODULE_DEVICE_TABLE(i2c, stmpe_id);
  84
  85 static struct i2c_driver stmpe_i2c_driver = {
  86         .driver = {
  87                 .name = "stmpe-i2c",
  88                 .owner = THIS_MODULE,
  89 #ifdef CONFIG_PM
  90                 .pm = &stmpe_dev_pm_ops,
  91 #endif
  92         },
  93         .probe          = stmpe_i2c_probe,
  94         .remove         = stmpe_i2c_remove,
  95         .id_table       = stmpe_i2c_id,
  96 };
  97
  98 static int __init stmpe_init(void)
  99 {
 100         return i2c_add_driver(&stmpe_i2c_driver);
 101 }
 102 subsys_initcall(stmpe_init);
 103
 104 static void __exit stmpe_exit(void)
 105 {
 106         i2c_del_driver(&stmpe_i2c_driver);
 107 }
 108 module_exit(stmpe_exit);
 109
 110 MODULE_LICENSE("GPL v2");
 111 MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver");
 112 MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");