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cc842bd5 DD |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* | |
3 | * Hardware monitoring driver for TEXAS TPS546D24 buck converter | |
4 | */ | |
5 | ||
6 | #include <linux/err.h> | |
7 | #include <linux/i2c.h> | |
8 | #include <linux/init.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/pmbus.h> | |
12 | #include "pmbus.h" | |
13 | ||
14 | static struct pmbus_driver_info tps546d24_info = { | |
15 | .pages = 1, | |
16 | .format[PSC_VOLTAGE_IN] = linear, | |
17 | .format[PSC_VOLTAGE_OUT] = linear, | |
18 | .format[PSC_TEMPERATURE] = linear, | |
19 | .format[PSC_CURRENT_OUT] = linear, | |
20 | .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | |
21 | | PMBUS_HAVE_IOUT | PMBUS_HAVE_VOUT | |
22 | | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT | |
23 | | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, | |
24 | }; | |
25 | ||
26 | static int tps546d24_probe(struct i2c_client *client) | |
27 | { | |
28 | int reg; | |
29 | ||
30 | reg = i2c_smbus_read_byte_data(client, PMBUS_VOUT_MODE); | |
31 | if (reg < 0) | |
32 | return reg; | |
33 | ||
34 | if (reg & 0x80) { | |
35 | int err; | |
36 | ||
37 | err = i2c_smbus_write_byte_data(client, PMBUS_VOUT_MODE, reg & 0x7f); | |
38 | if (err < 0) | |
39 | return err; | |
40 | } | |
41 | return pmbus_do_probe(client, &tps546d24_info); | |
42 | } | |
43 | ||
44 | static const struct i2c_device_id tps546d24_id[] = { | |
d8a66f36 | 45 | {"tps546d24"}, |
cc842bd5 DD |
46 | {} |
47 | }; | |
48 | MODULE_DEVICE_TABLE(i2c, tps546d24_id); | |
49 | ||
50 | static const struct of_device_id __maybe_unused tps546d24_of_match[] = { | |
51 | {.compatible = "ti,tps546d24"}, | |
52 | {} | |
53 | }; | |
54 | MODULE_DEVICE_TABLE(of, tps546d24_of_match); | |
55 | ||
56 | /* This is the driver that will be inserted */ | |
57 | static struct i2c_driver tps546d24_driver = { | |
58 | .driver = { | |
59 | .name = "tps546d24", | |
60 | .of_match_table = of_match_ptr(tps546d24_of_match), | |
61 | }, | |
1975d167 | 62 | .probe = tps546d24_probe, |
cc842bd5 DD |
63 | .id_table = tps546d24_id, |
64 | }; | |
65 | ||
66 | module_i2c_driver(tps546d24_driver); | |
67 | ||
68 | MODULE_AUTHOR("Duke Du <dukedu83@gmail.com>"); | |
69 | MODULE_DESCRIPTION("PMBus driver for TI tps546d24"); | |
70 | MODULE_LICENSE("GPL"); | |
71 | MODULE_IMPORT_NS(PMBUS); |