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 { "stmpe2401", STMPE2401 }, 79 { "stmpe2403", STMPE2403 }, 80 { } 81 }; 82 MODULE_DEVICE_TABLE(i2c, stmpe_id); 83 84 static struct i2c_driver stmpe_i2c_driver = { 85 .driver = { 86 .name = "stmpe-i2c", 87 .owner = THIS_MODULE, 88 #ifdef CONFIG_PM 89 .pm = &stmpe_dev_pm_ops, 90 #endif 91 }, 92 .probe = stmpe_i2c_probe, 93 .remove = stmpe_i2c_remove, 94 .id_table = stmpe_i2c_id, 95 }; 96 97 static int __init stmpe_init(void) 98 { 99 return i2c_add_driver(&stmpe_i2c_driver); 100 } 101 subsys_initcall(stmpe_init); 102 103 static void __exit stmpe_exit(void) 104 { 105 i2c_del_driver(&stmpe_i2c_driver); 106 } 107 module_exit(stmpe_exit); 108 109 MODULE_LICENSE("GPL v2"); 110 MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver"); 111 MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>"); 112