1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Hardware monitoring driver for STMicroelectronics digital controller PM6764TR |
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 | #define PM6764TR_PMBUS_READ_VOUT 0xD4 |
15 | |
16 | static int pm6764tr_read_word_data(struct i2c_client *client, int page, int phase, int reg) |
17 | { |
18 | int ret; |
19 | |
20 | switch (reg) { |
21 | case PMBUS_VIRT_READ_VMON: |
22 | ret = pmbus_read_word_data(client, page, phase, PM6764TR_PMBUS_READ_VOUT); |
23 | break; |
24 | default: |
25 | ret = -ENODATA; |
26 | break; |
27 | } |
28 | return ret; |
29 | } |
30 | |
31 | static struct pmbus_driver_info pm6764tr_info = { |
32 | .pages = 1, |
33 | .format[PSC_VOLTAGE_IN] = linear, |
34 | .format[PSC_VOLTAGE_OUT] = vid, |
35 | .format[PSC_TEMPERATURE] = linear, |
36 | .format[PSC_CURRENT_OUT] = linear, |
37 | .format[PSC_POWER] = linear, |
38 | .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_PIN | |
39 | PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | PMBUS_HAVE_VMON | |
40 | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT | |
41 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
42 | .read_word_data = pm6764tr_read_word_data, |
43 | }; |
44 | |
45 | static int pm6764tr_probe(struct i2c_client *client) |
46 | { |
47 | return pmbus_do_probe(client, info: &pm6764tr_info); |
48 | } |
49 | |
50 | static const struct i2c_device_id pm6764tr_id[] = { |
51 | {"pm6764tr" , 0}, |
52 | {} |
53 | }; |
54 | MODULE_DEVICE_TABLE(i2c, pm6764tr_id); |
55 | |
56 | static const struct of_device_id __maybe_unused pm6764tr_of_match[] = { |
57 | {.compatible = "st,pm6764tr" }, |
58 | {} |
59 | }; |
60 | |
61 | /* This is the driver that will be inserted */ |
62 | static struct i2c_driver pm6764tr_driver = { |
63 | .driver = { |
64 | .name = "pm6764tr" , |
65 | .of_match_table = of_match_ptr(pm6764tr_of_match), |
66 | }, |
67 | .probe = pm6764tr_probe, |
68 | .id_table = pm6764tr_id, |
69 | }; |
70 | |
71 | module_i2c_driver(pm6764tr_driver); |
72 | |
73 | MODULE_AUTHOR("Charles Hsu" ); |
74 | MODULE_DESCRIPTION("PMBus driver for ST PM6764TR" ); |
75 | MODULE_LICENSE("GPL" ); |
76 | MODULE_IMPORT_NS(PMBUS); |
77 | |