Hemanth V | b029ffa | 2010-11-30 23:03:54 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Implements I2C interface for VTI CMA300_D0x Accelerometer driver |
| 3 | * |
| 4 | * Copyright (C) 2010 Texas Instruments |
| 5 | * Author: Hemanth V <hemanthv@ti.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License version 2 as published by |
| 9 | * the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 14 | * more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along with |
| 17 | * this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/i2c.h> |
| 22 | #include <linux/input/cma3000.h> |
| 23 | #include "cma3000_d0x.h" |
| 24 | |
| 25 | static int cma3000_i2c_set(struct device *dev, |
| 26 | u8 reg, u8 val, char *msg) |
| 27 | { |
| 28 | struct i2c_client *client = to_i2c_client(dev); |
| 29 | int ret; |
| 30 | |
| 31 | ret = i2c_smbus_write_byte_data(client, reg, val); |
| 32 | if (ret < 0) |
| 33 | dev_err(&client->dev, |
| 34 | "%s failed (%s, %d)\n", __func__, msg, ret); |
| 35 | return ret; |
| 36 | } |
| 37 | |
| 38 | static int cma3000_i2c_read(struct device *dev, u8 reg, char *msg) |
| 39 | { |
| 40 | struct i2c_client *client = to_i2c_client(dev); |
| 41 | int ret; |
| 42 | |
| 43 | ret = i2c_smbus_read_byte_data(client, reg); |
| 44 | if (ret < 0) |
| 45 | dev_err(&client->dev, |
| 46 | "%s failed (%s, %d)\n", __func__, msg, ret); |
| 47 | return ret; |
| 48 | } |
| 49 | |
| 50 | static const struct cma3000_bus_ops cma3000_i2c_bops = { |
| 51 | .bustype = BUS_I2C, |
| 52 | #define CMA3000_BUSI2C (0 << 4) |
| 53 | .ctrl_mod = CMA3000_BUSI2C, |
| 54 | .read = cma3000_i2c_read, |
| 55 | .write = cma3000_i2c_set, |
| 56 | }; |
| 57 | |
| 58 | static int __devinit cma3000_i2c_probe(struct i2c_client *client, |
| 59 | const struct i2c_device_id *id) |
| 60 | { |
| 61 | struct cma3000_accl_data *data; |
| 62 | |
| 63 | data = cma3000_init(&client->dev, client->irq, &cma3000_i2c_bops); |
| 64 | if (IS_ERR(data)) |
| 65 | return PTR_ERR(data); |
| 66 | |
| 67 | i2c_set_clientdata(client, data); |
| 68 | |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | static int __devexit cma3000_i2c_remove(struct i2c_client *client) |
| 73 | { |
| 74 | struct cma3000_accl_data *data = i2c_get_clientdata(client); |
| 75 | |
| 76 | cma3000_exit(data); |
| 77 | |
| 78 | return 0; |
| 79 | } |
| 80 | |
| 81 | #ifdef CONFIG_PM |
| 82 | static int cma3000_i2c_suspend(struct device *dev) |
| 83 | { |
| 84 | struct i2c_client *client = to_i2c_client(dev); |
| 85 | struct cma3000_accl_data *data = i2c_get_clientdata(client); |
| 86 | |
| 87 | cma3000_suspend(data); |
| 88 | |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | static int cma3000_i2c_resume(struct device *dev) |
| 93 | { |
| 94 | struct i2c_client *client = to_i2c_client(dev); |
| 95 | struct cma3000_accl_data *data = i2c_get_clientdata(client); |
| 96 | |
| 97 | cma3000_resume(data); |
| 98 | |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | static const struct dev_pm_ops cma3000_i2c_pm_ops = { |
| 103 | .suspend = cma3000_i2c_suspend, |
| 104 | .resume = cma3000_i2c_resume, |
| 105 | }; |
| 106 | #endif |
| 107 | |
| 108 | static const struct i2c_device_id cma3000_i2c_id[] = { |
| 109 | { "cma3000_d01", 0 }, |
| 110 | { }, |
| 111 | }; |
| 112 | |
Dmitry Torokhov | 356c6f6 | 2010-12-07 22:11:09 -0800 | [diff] [blame] | 113 | MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id); |
| 114 | |
Hemanth V | b029ffa | 2010-11-30 23:03:54 -0800 | [diff] [blame] | 115 | static struct i2c_driver cma3000_i2c_driver = { |
| 116 | .probe = cma3000_i2c_probe, |
| 117 | .remove = __devexit_p(cma3000_i2c_remove), |
| 118 | .id_table = cma3000_i2c_id, |
| 119 | .driver = { |
| 120 | .name = "cma3000_i2c_accl", |
| 121 | .owner = THIS_MODULE, |
| 122 | #ifdef CONFIG_PM |
| 123 | .pm = &cma3000_i2c_pm_ops, |
| 124 | #endif |
| 125 | }, |
| 126 | }; |
| 127 | |
Axel Lin | 1b92c1c | 2012-03-16 23:05:41 -0700 | [diff] [blame] | 128 | module_i2c_driver(cma3000_i2c_driver); |
Hemanth V | b029ffa | 2010-11-30 23:03:54 -0800 | [diff] [blame] | 129 | |
| 130 | MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver"); |
| 131 | MODULE_LICENSE("GPL"); |
| 132 | MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>"); |