1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2016 Texas Instruments Incorporated - https://www.ti.com/
4 *
5 * Author: Keerthy <j-keerthy@ti.com>
6 */
7
8 #include <linux/interrupt.h>
9 #include <linux/mfd/core.h>
10 #include <linux/mod_devicetable.h>
11 #include <linux/module.h>
12 #include <linux/regmap.h>
13
14 #include <linux/mfd/lp873x.h>
15
16 static const struct regmap_config lp873x_regmap_config = {
17 .reg_bits = 8,
18 .val_bits = 8,
19 .max_register = LP873X_REG_MAX,
20 };
21
22 static const struct mfd_cell lp873x_cells[] = {
23 { .name = "lp873x-regulator", },
24 { .name = "lp873x-gpio", },
25 };
26
lp873x_probe(struct i2c_client * client)27 static int lp873x_probe(struct i2c_client *client)
28 {
29 struct lp873x *lp873;
30 int ret;
31 unsigned int otpid;
32
33 lp873 = devm_kzalloc(&client->dev, sizeof(*lp873), GFP_KERNEL);
34 if (!lp873)
35 return -ENOMEM;
36
37 lp873->dev = &client->dev;
38
39 lp873->regmap = devm_regmap_init_i2c(client, &lp873x_regmap_config);
40 if (IS_ERR(lp873->regmap)) {
41 ret = PTR_ERR(lp873->regmap);
42 dev_err(lp873->dev,
43 "Failed to initialize register map: %d\n", ret);
44 return ret;
45 }
46
47 ret = regmap_read(lp873->regmap, LP873X_REG_OTP_REV, &otpid);
48 if (ret) {
49 dev_err(lp873->dev, "Failed to read OTP ID\n");
50 return ret;
51 }
52
53 lp873->rev = otpid & LP873X_OTP_REV_OTP_ID;
54
55 i2c_set_clientdata(client, lp873);
56
57 ret = mfd_add_devices(lp873->dev, PLATFORM_DEVID_AUTO, lp873x_cells,
58 ARRAY_SIZE(lp873x_cells), NULL, 0, NULL);
59
60 return ret;
61 }
62
63 static const struct of_device_id of_lp873x_match_table[] = {
64 { .compatible = "ti,lp8733", },
65 { .compatible = "ti,lp8732", },
66 {}
67 };
68 MODULE_DEVICE_TABLE(of, of_lp873x_match_table);
69
70 static const struct i2c_device_id lp873x_id_table[] = {
71 { "lp873x", 0 },
72 { },
73 };
74 MODULE_DEVICE_TABLE(i2c, lp873x_id_table);
75
76 static struct i2c_driver lp873x_driver = {
77 .driver = {
78 .name = "lp873x",
79 .of_match_table = of_lp873x_match_table,
80 },
81 .probe = lp873x_probe,
82 .id_table = lp873x_id_table,
83 };
84 module_i2c_driver(lp873x_driver);
85
86 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
87 MODULE_DESCRIPTION("LP873X chip family Multi-Function Device driver");
88 MODULE_LICENSE("GPL v2");
89