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| 2 | |
| 3 | * AD7879-1/AD7889-1 touchscreen (I2C bus)
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| 4 | *
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| 5 | * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
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| 6 |
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| 7 |
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| 8 | #include <linux/input.h>
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| 9 | #include <linux/i2c.h>
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| 10 | #include <linux/module.h>
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| 11 | #include <linux/types.h>
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| 12 | #include <linux/of.h>
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| 13 | #include <linux/pm.h>
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| 14 | #include <linux/regmap.h>
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| 15 |
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| 16 | #include "ad7879.h"
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| 17 |
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| 18 | #define AD7879_DEVID 0x79
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| 19 |
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| 20 | static const struct regmap_config ad7879_i2c_regmap_config = {
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| 21 | .reg_bits = 8,
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| 22 | .val_bits = 16,
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| 23 | .max_register = 15,
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| 24 | };
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| 25 |
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| 26 | static int ad7879_i2c_probe(struct i2c_client *client)
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| 27 | {
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| 28 | struct regmap *regmap;
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| 29 |
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| 30 | if (!i2c_check_functionality(client->adapter,
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| 31 | I2C_FUNC_SMBUS_WORD_DATA)) {
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| 32 | dev_err(&client->dev, "SMBUS Word Data not Supported\n");
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| 33 | return -EIO;
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| 34 | }
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| 35 |
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| 36 | regmap = devm_regmap_init_i2c(client, &ad7879_i2c_regmap_config);
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| 37 | if (IS_ERR(regmap))
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| 38 | return PTR_ERR(regmap);
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| 39 |
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| 40 | return ad7879_probe(&client->dev, regmap, client->irq,
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| 41 | BUS_I2C, AD7879_DEVID);
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| 42 | }
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| 43 |
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| 44 | static const struct i2c_device_id ad7879_id[] = {
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| 45 | { .name = "ad7879" },
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| 46 | { .name = "ad7889" },
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| 47 | { }
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| 48 | };
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| 49 | MODULE_DEVICE_TABLE(i2c, ad7879_id);
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| 50 |
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| 51 | #ifdef CONFIG_OF
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| 52 | static const struct of_device_id ad7879_i2c_dt_ids[] = {
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| 53 | { .compatible = "adi,ad7879-1", },
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| 54 | { }
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| 55 | };
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| 56 | MODULE_DEVICE_TABLE(of, ad7879_i2c_dt_ids);
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| 57 | #endif
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| 58 |
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| 59 | static struct i2c_driver ad7879_i2c_driver = {
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| 60 | .driver = {
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| 61 | .name = "ad7879",
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| 62 | .dev_groups = ad7879_groups,
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| 63 | .pm = &ad7879_pm_ops,
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| 64 | .of_match_table = of_match_ptr(ad7879_i2c_dt_ids),
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| 65 | },
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| 66 | .probe = ad7879_i2c_probe,
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| 67 | .id_table = ad7879_id,
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| 68 | };
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| 69 |
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| 70 | module_i2c_driver(ad7879_i2c_driver);
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| 71 |
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| 72 | MODULE_AUTHOR("Michael Hennerich <[email protected]>");
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| 73 | MODULE_DESCRIPTION("AD7879(-1) touchscreen I2C bus driver");
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| 74 | MODULE_LICENSE("GPL");
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