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
pm6764tr_read_word_data(struct i2c_client * client,int page,int phase,int reg)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
pm6764tr_probe(struct i2c_client * client)45 static int pm6764tr_probe(struct i2c_client *client)
46 {
47 return pmbus_do_probe(client, &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
