1*1a6e4b74SViresh Kumar /* 2*1a6e4b74SViresh Kumar * ST Microelectronics MFD: stmpe's i2c client specific driver 3*1a6e4b74SViresh Kumar * 4*1a6e4b74SViresh Kumar * Copyright (C) ST-Ericsson SA 2010 5*1a6e4b74SViresh Kumar * Copyright (C) ST Microelectronics SA 2011 6*1a6e4b74SViresh Kumar * 7*1a6e4b74SViresh Kumar * License Terms: GNU General Public License, version 2 8*1a6e4b74SViresh Kumar * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson 9*1a6e4b74SViresh Kumar * Author: Viresh Kumar <viresh.kumar@st.com> for ST Microelectronics 10*1a6e4b74SViresh Kumar */ 11*1a6e4b74SViresh Kumar 12*1a6e4b74SViresh Kumar #include <linux/i2c.h> 13*1a6e4b74SViresh Kumar #include <linux/interrupt.h> 14*1a6e4b74SViresh Kumar #include <linux/kernel.h> 15*1a6e4b74SViresh Kumar #include <linux/module.h> 16*1a6e4b74SViresh Kumar #include <linux/types.h> 17*1a6e4b74SViresh Kumar #include "stmpe.h" 18*1a6e4b74SViresh Kumar 19*1a6e4b74SViresh Kumar static int i2c_reg_read(struct stmpe *stmpe, u8 reg) 20*1a6e4b74SViresh Kumar { 21*1a6e4b74SViresh Kumar struct i2c_client *i2c = stmpe->client; 22*1a6e4b74SViresh Kumar 23*1a6e4b74SViresh Kumar return i2c_smbus_read_byte_data(i2c, reg); 24*1a6e4b74SViresh Kumar } 25*1a6e4b74SViresh Kumar 26*1a6e4b74SViresh Kumar static int i2c_reg_write(struct stmpe *stmpe, u8 reg, u8 val) 27*1a6e4b74SViresh Kumar { 28*1a6e4b74SViresh Kumar struct i2c_client *i2c = stmpe->client; 29*1a6e4b74SViresh Kumar 30*1a6e4b74SViresh Kumar return i2c_smbus_write_byte_data(i2c, reg, val); 31*1a6e4b74SViresh Kumar } 32*1a6e4b74SViresh Kumar 33*1a6e4b74SViresh Kumar static int i2c_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values) 34*1a6e4b74SViresh Kumar { 35*1a6e4b74SViresh Kumar struct i2c_client *i2c = stmpe->client; 36*1a6e4b74SViresh Kumar 37*1a6e4b74SViresh Kumar return i2c_smbus_read_i2c_block_data(i2c, reg, length, values); 38*1a6e4b74SViresh Kumar } 39*1a6e4b74SViresh Kumar 40*1a6e4b74SViresh Kumar static int i2c_block_write(struct stmpe *stmpe, u8 reg, u8 length, 41*1a6e4b74SViresh Kumar const u8 *values) 42*1a6e4b74SViresh Kumar { 43*1a6e4b74SViresh Kumar struct i2c_client *i2c = stmpe->client; 44*1a6e4b74SViresh Kumar 45*1a6e4b74SViresh Kumar return i2c_smbus_write_i2c_block_data(i2c, reg, length, values); 46*1a6e4b74SViresh Kumar } 47*1a6e4b74SViresh Kumar 48*1a6e4b74SViresh Kumar static struct stmpe_client_info i2c_ci = { 49*1a6e4b74SViresh Kumar .read_byte = i2c_reg_read, 50*1a6e4b74SViresh Kumar .write_byte = i2c_reg_write, 51*1a6e4b74SViresh Kumar .read_block = i2c_block_read, 52*1a6e4b74SViresh Kumar .write_block = i2c_block_write, 53*1a6e4b74SViresh Kumar }; 54*1a6e4b74SViresh Kumar 55*1a6e4b74SViresh Kumar static int __devinit 56*1a6e4b74SViresh Kumar stmpe_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) 57*1a6e4b74SViresh Kumar { 58*1a6e4b74SViresh Kumar i2c_ci.data = (void *)id; 59*1a6e4b74SViresh Kumar i2c_ci.irq = i2c->irq; 60*1a6e4b74SViresh Kumar i2c_ci.client = i2c; 61*1a6e4b74SViresh Kumar i2c_ci.dev = &i2c->dev; 62*1a6e4b74SViresh Kumar 63*1a6e4b74SViresh Kumar return stmpe_probe(&i2c_ci, id->driver_data); 64*1a6e4b74SViresh Kumar } 65*1a6e4b74SViresh Kumar 66*1a6e4b74SViresh Kumar static int __devexit stmpe_i2c_remove(struct i2c_client *i2c) 67*1a6e4b74SViresh Kumar { 68*1a6e4b74SViresh Kumar struct stmpe *stmpe = dev_get_drvdata(&i2c->dev); 69*1a6e4b74SViresh Kumar 70*1a6e4b74SViresh Kumar return stmpe_remove(stmpe); 71*1a6e4b74SViresh Kumar } 72*1a6e4b74SViresh Kumar 73*1a6e4b74SViresh Kumar static const struct i2c_device_id stmpe_i2c_id[] = { 74*1a6e4b74SViresh Kumar { "stmpe811", STMPE811 }, 75*1a6e4b74SViresh Kumar { "stmpe1601", STMPE1601 }, 76*1a6e4b74SViresh Kumar { "stmpe2401", STMPE2401 }, 77*1a6e4b74SViresh Kumar { "stmpe2403", STMPE2403 }, 78*1a6e4b74SViresh Kumar { } 79*1a6e4b74SViresh Kumar }; 80*1a6e4b74SViresh Kumar MODULE_DEVICE_TABLE(i2c, stmpe_id); 81*1a6e4b74SViresh Kumar 82*1a6e4b74SViresh Kumar static struct i2c_driver stmpe_i2c_driver = { 83*1a6e4b74SViresh Kumar .driver.name = "stmpe-i2c", 84*1a6e4b74SViresh Kumar .driver.owner = THIS_MODULE, 85*1a6e4b74SViresh Kumar #ifdef CONFIG_PM 86*1a6e4b74SViresh Kumar .driver.pm = &stmpe_dev_pm_ops, 87*1a6e4b74SViresh Kumar #endif 88*1a6e4b74SViresh Kumar .probe = stmpe_i2c_probe, 89*1a6e4b74SViresh Kumar .remove = __devexit_p(stmpe_i2c_remove), 90*1a6e4b74SViresh Kumar .id_table = stmpe_i2c_id, 91*1a6e4b74SViresh Kumar }; 92*1a6e4b74SViresh Kumar 93*1a6e4b74SViresh Kumar static int __init stmpe_init(void) 94*1a6e4b74SViresh Kumar { 95*1a6e4b74SViresh Kumar return i2c_add_driver(&stmpe_i2c_driver); 96*1a6e4b74SViresh Kumar } 97*1a6e4b74SViresh Kumar subsys_initcall(stmpe_init); 98*1a6e4b74SViresh Kumar 99*1a6e4b74SViresh Kumar static void __exit stmpe_exit(void) 100*1a6e4b74SViresh Kumar { 101*1a6e4b74SViresh Kumar i2c_del_driver(&stmpe_i2c_driver); 102*1a6e4b74SViresh Kumar } 103*1a6e4b74SViresh Kumar module_exit(stmpe_exit); 104*1a6e4b74SViresh Kumar 105*1a6e4b74SViresh Kumar MODULE_LICENSE("GPL v2"); 106*1a6e4b74SViresh Kumar MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver"); 107*1a6e4b74SViresh Kumar MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>"); 108