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