356c6f654d
This should allow loading this module automatically on systems that have such device. Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
/*
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* Implements I2C interface for VTI CMA300_D0x Accelerometer driver
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*
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* Copyright (C) 2010 Texas Instruments
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* Author: Hemanth V <hemanthv@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/input/cma3000.h>
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#include "cma3000_d0x.h"
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static int cma3000_i2c_set(struct device *dev,
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u8 reg, u8 val, char *msg)
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{
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struct i2c_client *client = to_i2c_client(dev);
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int ret;
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ret = i2c_smbus_write_byte_data(client, reg, val);
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if (ret < 0)
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dev_err(&client->dev,
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"%s failed (%s, %d)\n", __func__, msg, ret);
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return ret;
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}
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static int cma3000_i2c_read(struct device *dev, u8 reg, char *msg)
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{
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struct i2c_client *client = to_i2c_client(dev);
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int ret;
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0)
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dev_err(&client->dev,
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"%s failed (%s, %d)\n", __func__, msg, ret);
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return ret;
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}
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static const struct cma3000_bus_ops cma3000_i2c_bops = {
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.bustype = BUS_I2C,
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#define CMA3000_BUSI2C (0 << 4)
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.ctrl_mod = CMA3000_BUSI2C,
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.read = cma3000_i2c_read,
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.write = cma3000_i2c_set,
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};
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static int __devinit cma3000_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct cma3000_accl_data *data;
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data = cma3000_init(&client->dev, client->irq, &cma3000_i2c_bops);
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if (IS_ERR(data))
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return PTR_ERR(data);
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i2c_set_clientdata(client, data);
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return 0;
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}
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static int __devexit cma3000_i2c_remove(struct i2c_client *client)
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{
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struct cma3000_accl_data *data = i2c_get_clientdata(client);
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cma3000_exit(data);
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return 0;
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}
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#ifdef CONFIG_PM
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static int cma3000_i2c_suspend(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct cma3000_accl_data *data = i2c_get_clientdata(client);
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cma3000_suspend(data);
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return 0;
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}
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static int cma3000_i2c_resume(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct cma3000_accl_data *data = i2c_get_clientdata(client);
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cma3000_resume(data);
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return 0;
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}
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static const struct dev_pm_ops cma3000_i2c_pm_ops = {
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.suspend = cma3000_i2c_suspend,
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.resume = cma3000_i2c_resume,
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};
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#endif
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static const struct i2c_device_id cma3000_i2c_id[] = {
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{ "cma3000_d01", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id);
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static struct i2c_driver cma3000_i2c_driver = {
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.probe = cma3000_i2c_probe,
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.remove = __devexit_p(cma3000_i2c_remove),
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.id_table = cma3000_i2c_id,
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.driver = {
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.name = "cma3000_i2c_accl",
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.owner = THIS_MODULE,
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#ifdef CONFIG_PM
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.pm = &cma3000_i2c_pm_ops,
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#endif
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},
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};
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static int __init cma3000_i2c_init(void)
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{
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return i2c_add_driver(&cma3000_i2c_driver);
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}
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static void __exit cma3000_i2c_exit(void)
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{
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i2c_del_driver(&cma3000_i2c_driver);
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}
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module_init(cma3000_i2c_init);
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module_exit(cma3000_i2c_exit);
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MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver");
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>");
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