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00669d19 MS |
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> | |
e65de225 | 19 | #include <linux/of_device.h> |
0ee7f624 | 20 | #include <linux/regulator/driver.h> |
00669d19 MS |
21 | #include "pmbus.h" |
22 | ||
0ee7f624 PR |
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 | ||
00669d19 MS |
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, | |
0ee7f624 PR |
44 | #if IS_ENABLED(CONFIG_SENSORS_IR38064_REGULATOR) |
45 | .num_regulators = 1, | |
46 | .reg_desc = ir38064_reg_desc, | |
47 | #endif | |
00669d19 MS |
48 | }; |
49 | ||
dd431939 | 50 | static int ir38064_probe(struct i2c_client *client) |
00669d19 | 51 | { |
dd431939 | 52 | return pmbus_do_probe(client, &ir38064_info); |
00669d19 MS |
53 | } |
54 | ||
55 | static const struct i2c_device_id ir38064_id[] = { | |
ca003af3 | 56 | {"ir38060", 0}, |
00669d19 | 57 | {"ir38064", 0}, |
ca003af3 PR |
58 | {"ir38164", 0}, |
59 | {"ir38263", 0}, | |
00669d19 MS |
60 | {} |
61 | }; | |
62 | ||
63 | MODULE_DEVICE_TABLE(i2c, ir38064_id); | |
64 | ||
f1e75e0d | 65 | static const struct of_device_id __maybe_unused ir38064_of_match[] = { |
e65de225 AH |
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 | ||
00669d19 MS |
75 | /* This is the driver that will be inserted */ |
76 | static struct i2c_driver ir38064_driver = { | |
77 | .driver = { | |
78 | .name = "ir38064", | |
e65de225 | 79 | .of_match_table = of_match_ptr(ir38064_of_match), |
00669d19 | 80 | }, |
dd431939 | 81 | .probe_new = ir38064_probe, |
00669d19 MS |
82 | .id_table = ir38064_id, |
83 | }; | |
84 | ||
85 | module_i2c_driver(ir38064_driver); | |
86 | ||
87 | MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>"); | |
23c7df14 | 88 | MODULE_DESCRIPTION("PMBus driver for Infineon IR38064 and compatible chips"); |
00669d19 | 89 | MODULE_LICENSE("GPL"); |
b94ca77e | 90 | MODULE_IMPORT_NS(PMBUS); |