1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Hardware monitoring driver for Infineon IR38064 |
4 | * |
5 | * Copyright (c) 2017 Google Inc |
6 | * |
7 | * VOUT_MODE is not supported by the device. The driver fakes VOUT linear16 |
8 | * mode with exponent value -8 as direct mode with m=256/b=0/R=0. |
9 | * |
10 | * The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however |
11 | * this driver does not currently support them. |
12 | */ |
13 | |
14 | #include <linux/err.h> |
15 | #include <linux/i2c.h> |
16 | #include <linux/init.h> |
17 | #include <linux/kernel.h> |
18 | #include <linux/module.h> |
19 | #include <linux/of.h> |
20 | #include <linux/regulator/driver.h> |
21 | #include "pmbus.h" |
22 | |
23 | #if IS_ENABLED(CONFIG_SENSORS_IR38064_REGULATOR) |
24 | static const struct regulator_desc ir38064_reg_desc[] = { |
25 | PMBUS_REGULATOR("vout" , 0), |
26 | }; |
27 | #endif /* CONFIG_SENSORS_IR38064_REGULATOR */ |
28 | |
29 | static struct pmbus_driver_info ir38064_info = { |
30 | .pages = 1, |
31 | .format[PSC_VOLTAGE_IN] = linear, |
32 | .format[PSC_VOLTAGE_OUT] = direct, |
33 | .format[PSC_CURRENT_OUT] = linear, |
34 | .format[PSC_POWER] = linear, |
35 | .format[PSC_TEMPERATURE] = linear, |
36 | .m[PSC_VOLTAGE_OUT] = 256, |
37 | .b[PSC_VOLTAGE_OUT] = 0, |
38 | .R[PSC_VOLTAGE_OUT] = 0, |
39 | .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT |
40 | | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
41 | | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
42 | | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
43 | | PMBUS_HAVE_POUT, |
44 | #if IS_ENABLED(CONFIG_SENSORS_IR38064_REGULATOR) |
45 | .num_regulators = 1, |
46 | .reg_desc = ir38064_reg_desc, |
47 | #endif |
48 | }; |
49 | |
50 | static int ir38064_probe(struct i2c_client *client) |
51 | { |
52 | return pmbus_do_probe(client, info: &ir38064_info); |
53 | } |
54 | |
55 | static const struct i2c_device_id ir38064_id[] = { |
56 | {"ir38060" , 0}, |
57 | {"ir38064" , 0}, |
58 | {"ir38164" , 0}, |
59 | {"ir38263" , 0}, |
60 | {} |
61 | }; |
62 | |
63 | MODULE_DEVICE_TABLE(i2c, ir38064_id); |
64 | |
65 | static const struct of_device_id __maybe_unused ir38064_of_match[] = { |
66 | { .compatible = "infineon,ir38060" }, |
67 | { .compatible = "infineon,ir38064" }, |
68 | { .compatible = "infineon,ir38164" }, |
69 | { .compatible = "infineon,ir38263" }, |
70 | {} |
71 | }; |
72 | |
73 | MODULE_DEVICE_TABLE(of, ir38064_of_match); |
74 | |
75 | /* This is the driver that will be inserted */ |
76 | static struct i2c_driver ir38064_driver = { |
77 | .driver = { |
78 | .name = "ir38064" , |
79 | .of_match_table = of_match_ptr(ir38064_of_match), |
80 | }, |
81 | .probe = ir38064_probe, |
82 | .id_table = ir38064_id, |
83 | }; |
84 | |
85 | module_i2c_driver(ir38064_driver); |
86 | |
87 | MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>" ); |
88 | MODULE_DESCRIPTION("PMBus driver for Infineon IR38064 and compatible chips" ); |
89 | MODULE_LICENSE("GPL" ); |
90 | MODULE_IMPORT_NS(PMBUS); |
91 | |