1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * I2C bus interface for ATC260x PMICs
4  *
5  * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
6  * Copyright (C) 2020 Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
7  */
8 
9 #include <linux/i2c.h>
10 #include <linux/mfd/atc260x/core.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <linux/regmap.h>
14 
atc260x_i2c_probe(struct i2c_client * client,const struct i2c_device_id * id)15 static int atc260x_i2c_probe(struct i2c_client *client,
16 			     const struct i2c_device_id *id)
17 {
18 	struct atc260x *atc260x;
19 	struct regmap_config regmap_cfg;
20 	int ret;
21 
22 	atc260x = devm_kzalloc(&client->dev, sizeof(*atc260x), GFP_KERNEL);
23 	if (!atc260x)
24 		return -ENOMEM;
25 
26 	atc260x->dev = &client->dev;
27 	atc260x->irq = client->irq;
28 
29 	ret = atc260x_match_device(atc260x, &regmap_cfg);
30 	if (ret)
31 		return ret;
32 
33 	i2c_set_clientdata(client, atc260x);
34 
35 	atc260x->regmap = devm_regmap_init_i2c(client, &regmap_cfg);
36 	if (IS_ERR(atc260x->regmap)) {
37 		ret = PTR_ERR(atc260x->regmap);
38 		dev_err(&client->dev, "failed to init regmap: %d\n", ret);
39 		return ret;
40 	}
41 
42 	return atc260x_device_probe(atc260x);
43 }
44 
45 static const struct of_device_id atc260x_i2c_of_match[] = {
46 	{ .compatible = "actions,atc2603c", .data = (void *)ATC2603C },
47 	{ .compatible = "actions,atc2609a", .data = (void *)ATC2609A },
48 	{ }
49 };
50 MODULE_DEVICE_TABLE(of, atc260x_i2c_of_match);
51 
52 static struct i2c_driver atc260x_i2c_driver = {
53 	.driver = {
54 		.name = "atc260x",
55 		.of_match_table	= of_match_ptr(atc260x_i2c_of_match),
56 	},
57 	.probe = atc260x_i2c_probe,
58 };
59 module_i2c_driver(atc260x_i2c_driver);
60 
61 MODULE_DESCRIPTION("ATC260x PMICs I2C bus interface");
62 MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>");
63 MODULE_AUTHOR("Cristian Ciocaltea <cristian.ciocaltea@gmail.com>");
64 MODULE_LICENSE("GPL");
65