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| 3 | * Implements I2C interface for VTI CMA300_D0x Accelerometer driver
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| 4 | *
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| 5 | * Copyright (C) 2010 Texas Instruments
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| 6 | * Author: Hemanth V <[email protected]>
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| 7 |
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| 8 |
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| 9 | #include <linux/module.h>
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| 10 | #include <linux/i2c.h>
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| 11 | #include <linux/input/cma3000.h>
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| 12 | #include "cma3000_d0x.h"
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| 13 |
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| 14 | static int cma3000_i2c_set(struct device *dev,
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| 15 | u8 reg, u8 val, char *msg)
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| 16 | {
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| 17 | struct i2c_client *client = to_i2c_client(dev);
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| 18 | int ret;
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| 19 |
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| 20 | ret = i2c_smbus_write_byte_data(client, reg, val);
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| 21 | if (ret < 0)
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| 22 | dev_err(&client->dev,
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| 23 | "%s failed (%s, %d)\n", __func__, msg, ret);
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| 24 | return ret;
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| 25 | }
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| 26 |
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| 27 | static int cma3000_i2c_read(struct device *dev, u8 reg, char *msg)
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| 28 | {
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| 29 | struct i2c_client *client = to_i2c_client(dev);
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| 30 | int ret;
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| 31 |
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| 32 | ret = i2c_smbus_read_byte_data(client, reg);
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| 33 | if (ret < 0)
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| 34 | dev_err(&client->dev,
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| 35 | "%s failed (%s, %d)\n", __func__, msg, ret);
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| 36 | return ret;
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| 37 | }
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| 38 |
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| 39 | static const struct cma3000_bus_ops cma3000_i2c_bops = {
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| 40 | .bustype = BUS_I2C,
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| 41 | #define CMA3000_BUSI2C (0 << 4)
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| 42 | .ctrl_mod = CMA3000_BUSI2C,
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| 43 | .read = cma3000_i2c_read,
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| 44 | .write = cma3000_i2c_set,
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| 45 | };
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| 46 |
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| 47 | static int cma3000_i2c_probe(struct i2c_client *client)
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| 48 | {
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| 49 | struct cma3000_accl_data *data;
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| 50 |
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| 51 | data = cma3000_init(&client->dev, client->irq, &cma3000_i2c_bops);
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| 52 | if (IS_ERR(data))
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| 53 | return PTR_ERR(data);
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| 54 |
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| 55 | i2c_set_clientdata(client, data);
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| 56 |
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| 57 | return 0;
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| 58 | }
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| 59 |
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| 60 | static void cma3000_i2c_remove(struct i2c_client *client)
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| 61 | {
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| 62 | struct cma3000_accl_data *data = i2c_get_clientdata(client);
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| 63 |
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| 64 | cma3000_exit(data);
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| 65 | }
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| 66 |
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| 67 | static int cma3000_i2c_suspend(struct device *dev)
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| 68 | {
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| 69 | struct i2c_client *client = to_i2c_client(dev);
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| 70 | struct cma3000_accl_data *data = i2c_get_clientdata(client);
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| 71 |
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| 72 | cma3000_suspend(data);
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| 73 |
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| 74 | return 0;
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| 75 | }
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| 76 |
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| 77 | static int cma3000_i2c_resume(struct device *dev)
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| 78 | {
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| 79 | struct i2c_client *client = to_i2c_client(dev);
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| 80 | struct cma3000_accl_data *data = i2c_get_clientdata(client);
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| 81 |
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| 82 | cma3000_resume(data);
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| 83 |
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| 84 | return 0;
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| 85 | }
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| 86 |
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| 87 | static const struct dev_pm_ops cma3000_i2c_pm_ops = {
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| 88 | .suspend = cma3000_i2c_suspend,
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| 89 | .resume = cma3000_i2c_resume,
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| 90 | };
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| 91 |
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| 92 | static const struct i2c_device_id cma3000_i2c_id[] = {
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| 93 | { .name = "cma3000_d01" },
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| 94 | { }
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| 95 | };
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| 96 |
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| 97 | MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id);
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| 98 |
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| 99 | static struct i2c_driver cma3000_i2c_driver = {
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| 100 | .probe = cma3000_i2c_probe,
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| 101 | .remove = cma3000_i2c_remove,
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| 102 | .id_table = cma3000_i2c_id,
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| 103 | .driver = {
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| 104 | .name = "cma3000_i2c_accl",
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| 105 | .pm = pm_sleep_ptr(&cma3000_i2c_pm_ops),
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| 106 | },
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| 107 | };
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| 108 |
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| 109 | module_i2c_driver(cma3000_i2c_driver);
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| 110 |
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| 111 | MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver");
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| 112 | MODULE_LICENSE("GPL");
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| 113 | MODULE_AUTHOR("Hemanth V <[email protected]>");
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