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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> | |
19 | #include "pmbus.h" | |
20 | ||
21 | static struct pmbus_driver_info ir38064_info = { | |
22 | .pages = 1, | |
23 | .format[PSC_VOLTAGE_IN] = linear, | |
24 | .format[PSC_VOLTAGE_OUT] = direct, | |
25 | .format[PSC_CURRENT_OUT] = linear, | |
26 | .format[PSC_POWER] = linear, | |
27 | .format[PSC_TEMPERATURE] = linear, | |
28 | .m[PSC_VOLTAGE_OUT] = 256, | |
29 | .b[PSC_VOLTAGE_OUT] = 0, | |
30 | .R[PSC_VOLTAGE_OUT] = 0, | |
31 | .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT | |
32 | | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | |
33 | | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | |
34 | | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | |
35 | | PMBUS_HAVE_POUT, | |
36 | }; | |
37 | ||
dd431939 | 38 | static int ir38064_probe(struct i2c_client *client) |
00669d19 | 39 | { |
dd431939 | 40 | return pmbus_do_probe(client, &ir38064_info); |
00669d19 MS |
41 | } |
42 | ||
43 | static const struct i2c_device_id ir38064_id[] = { | |
44 | {"ir38064", 0}, | |
45 | {} | |
46 | }; | |
47 | ||
48 | MODULE_DEVICE_TABLE(i2c, ir38064_id); | |
49 | ||
50 | /* This is the driver that will be inserted */ | |
51 | static struct i2c_driver ir38064_driver = { | |
52 | .driver = { | |
53 | .name = "ir38064", | |
54 | }, | |
dd431939 | 55 | .probe_new = ir38064_probe, |
00669d19 MS |
56 | .id_table = ir38064_id, |
57 | }; | |
58 | ||
59 | module_i2c_driver(ir38064_driver); | |
60 | ||
61 | MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>"); | |
62 | MODULE_DESCRIPTION("PMBus driver for Infineon IR38064"); | |
63 | MODULE_LICENSE("GPL"); | |
b94ca77e | 64 | MODULE_IMPORT_NS(PMBUS); |