1b029ffafSHemanth V /* 2b029ffafSHemanth V * Implements I2C interface for VTI CMA300_D0x Accelerometer driver 3b029ffafSHemanth V * 4b029ffafSHemanth V * Copyright (C) 2010 Texas Instruments 5b029ffafSHemanth V * Author: Hemanth V <hemanthv@ti.com> 6b029ffafSHemanth V * 7b029ffafSHemanth V * This program is free software; you can redistribute it and/or modify it 8b029ffafSHemanth V * under the terms of the GNU General Public License version 2 as published by 9b029ffafSHemanth V * the Free Software Foundation. 10b029ffafSHemanth V * 11b029ffafSHemanth V * This program is distributed in the hope that it will be useful, but WITHOUT 12b029ffafSHemanth V * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13b029ffafSHemanth V * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14b029ffafSHemanth V * more details. 15b029ffafSHemanth V * 16b029ffafSHemanth V * You should have received a copy of the GNU General Public License along with 17b029ffafSHemanth V * this program. If not, see <http://www.gnu.org/licenses/>. 18b029ffafSHemanth V */ 19b029ffafSHemanth V 20b029ffafSHemanth V #include <linux/module.h> 21b029ffafSHemanth V #include <linux/i2c.h> 22b029ffafSHemanth V #include <linux/input/cma3000.h> 23b029ffafSHemanth V #include "cma3000_d0x.h" 24b029ffafSHemanth V 25b029ffafSHemanth V static int cma3000_i2c_set(struct device *dev, 26b029ffafSHemanth V u8 reg, u8 val, char *msg) 27b029ffafSHemanth V { 28b029ffafSHemanth V struct i2c_client *client = to_i2c_client(dev); 29b029ffafSHemanth V int ret; 30b029ffafSHemanth V 31b029ffafSHemanth V ret = i2c_smbus_write_byte_data(client, reg, val); 32b029ffafSHemanth V if (ret < 0) 33b029ffafSHemanth V dev_err(&client->dev, 34b029ffafSHemanth V "%s failed (%s, %d)\n", __func__, msg, ret); 35b029ffafSHemanth V return ret; 36b029ffafSHemanth V } 37b029ffafSHemanth V 38b029ffafSHemanth V static int cma3000_i2c_read(struct device *dev, u8 reg, char *msg) 39b029ffafSHemanth V { 40b029ffafSHemanth V struct i2c_client *client = to_i2c_client(dev); 41b029ffafSHemanth V int ret; 42b029ffafSHemanth V 43b029ffafSHemanth V ret = i2c_smbus_read_byte_data(client, reg); 44b029ffafSHemanth V if (ret < 0) 45b029ffafSHemanth V dev_err(&client->dev, 46b029ffafSHemanth V "%s failed (%s, %d)\n", __func__, msg, ret); 47b029ffafSHemanth V return ret; 48b029ffafSHemanth V } 49b029ffafSHemanth V 50b029ffafSHemanth V static const struct cma3000_bus_ops cma3000_i2c_bops = { 51b029ffafSHemanth V .bustype = BUS_I2C, 52b029ffafSHemanth V #define CMA3000_BUSI2C (0 << 4) 53b029ffafSHemanth V .ctrl_mod = CMA3000_BUSI2C, 54b029ffafSHemanth V .read = cma3000_i2c_read, 55b029ffafSHemanth V .write = cma3000_i2c_set, 56b029ffafSHemanth V }; 57b029ffafSHemanth V 58b029ffafSHemanth V static int __devinit cma3000_i2c_probe(struct i2c_client *client, 59b029ffafSHemanth V const struct i2c_device_id *id) 60b029ffafSHemanth V { 61b029ffafSHemanth V struct cma3000_accl_data *data; 62b029ffafSHemanth V 63b029ffafSHemanth V data = cma3000_init(&client->dev, client->irq, &cma3000_i2c_bops); 64b029ffafSHemanth V if (IS_ERR(data)) 65b029ffafSHemanth V return PTR_ERR(data); 66b029ffafSHemanth V 67b029ffafSHemanth V i2c_set_clientdata(client, data); 68b029ffafSHemanth V 69b029ffafSHemanth V return 0; 70b029ffafSHemanth V } 71b029ffafSHemanth V 72b029ffafSHemanth V static int __devexit cma3000_i2c_remove(struct i2c_client *client) 73b029ffafSHemanth V { 74b029ffafSHemanth V struct cma3000_accl_data *data = i2c_get_clientdata(client); 75b029ffafSHemanth V 76b029ffafSHemanth V cma3000_exit(data); 77b029ffafSHemanth V 78b029ffafSHemanth V return 0; 79b029ffafSHemanth V } 80b029ffafSHemanth V 81b029ffafSHemanth V #ifdef CONFIG_PM 82b029ffafSHemanth V static int cma3000_i2c_suspend(struct device *dev) 83b029ffafSHemanth V { 84b029ffafSHemanth V struct i2c_client *client = to_i2c_client(dev); 85b029ffafSHemanth V struct cma3000_accl_data *data = i2c_get_clientdata(client); 86b029ffafSHemanth V 87b029ffafSHemanth V cma3000_suspend(data); 88b029ffafSHemanth V 89b029ffafSHemanth V return 0; 90b029ffafSHemanth V } 91b029ffafSHemanth V 92b029ffafSHemanth V static int cma3000_i2c_resume(struct device *dev) 93b029ffafSHemanth V { 94b029ffafSHemanth V struct i2c_client *client = to_i2c_client(dev); 95b029ffafSHemanth V struct cma3000_accl_data *data = i2c_get_clientdata(client); 96b029ffafSHemanth V 97b029ffafSHemanth V cma3000_resume(data); 98b029ffafSHemanth V 99b029ffafSHemanth V return 0; 100b029ffafSHemanth V } 101b029ffafSHemanth V 102b029ffafSHemanth V static const struct dev_pm_ops cma3000_i2c_pm_ops = { 103b029ffafSHemanth V .suspend = cma3000_i2c_suspend, 104b029ffafSHemanth V .resume = cma3000_i2c_resume, 105b029ffafSHemanth V }; 106b029ffafSHemanth V #endif 107b029ffafSHemanth V 108b029ffafSHemanth V static const struct i2c_device_id cma3000_i2c_id[] = { 109b029ffafSHemanth V { "cma3000_d01", 0 }, 110b029ffafSHemanth V { }, 111b029ffafSHemanth V }; 112b029ffafSHemanth V 113356c6f65SDmitry Torokhov MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id); 114356c6f65SDmitry Torokhov 115b029ffafSHemanth V static struct i2c_driver cma3000_i2c_driver = { 116b029ffafSHemanth V .probe = cma3000_i2c_probe, 117b029ffafSHemanth V .remove = __devexit_p(cma3000_i2c_remove), 118b029ffafSHemanth V .id_table = cma3000_i2c_id, 119b029ffafSHemanth V .driver = { 120b029ffafSHemanth V .name = "cma3000_i2c_accl", 121b029ffafSHemanth V .owner = THIS_MODULE, 122b029ffafSHemanth V #ifdef CONFIG_PM 123b029ffafSHemanth V .pm = &cma3000_i2c_pm_ops, 124b029ffafSHemanth V #endif 125b029ffafSHemanth V }, 126b029ffafSHemanth V }; 127b029ffafSHemanth V 128b029ffafSHemanth V static int __init cma3000_i2c_init(void) 129b029ffafSHemanth V { 130b029ffafSHemanth V return i2c_add_driver(&cma3000_i2c_driver); 131b029ffafSHemanth V } 132b029ffafSHemanth V 133b029ffafSHemanth V static void __exit cma3000_i2c_exit(void) 134b029ffafSHemanth V { 135b029ffafSHemanth V i2c_del_driver(&cma3000_i2c_driver); 136b029ffafSHemanth V } 137b029ffafSHemanth V 138b029ffafSHemanth V module_init(cma3000_i2c_init); 139b029ffafSHemanth V module_exit(cma3000_i2c_exit); 140b029ffafSHemanth V 141b029ffafSHemanth V MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver"); 142b029ffafSHemanth V MODULE_LICENSE("GPL"); 143b029ffafSHemanth V MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>"); 144