1*8b3672c5SNinad Palsule // SPDX-License-Identifier: GPL-2.0-or-later
2*8b3672c5SNinad Palsule /*
3*8b3672c5SNinad Palsule * Copyright 2024 IBM Corp.
4*8b3672c5SNinad Palsule */
5*8b3672c5SNinad Palsule
6*8b3672c5SNinad Palsule #include <linux/i2c.h>
7*8b3672c5SNinad Palsule #include <linux/of.h>
8*8b3672c5SNinad Palsule #include <linux/pmbus.h>
9*8b3672c5SNinad Palsule
10*8b3672c5SNinad Palsule #include "pmbus.h"
11*8b3672c5SNinad Palsule
12*8b3672c5SNinad Palsule static const struct i2c_device_id crps_id[] = {
13*8b3672c5SNinad Palsule { "intel_crps185" },
14*8b3672c5SNinad Palsule {}
15*8b3672c5SNinad Palsule };
16*8b3672c5SNinad Palsule MODULE_DEVICE_TABLE(i2c, crps_id);
17*8b3672c5SNinad Palsule
18*8b3672c5SNinad Palsule static struct pmbus_driver_info crps_info = {
19*8b3672c5SNinad Palsule .pages = 1,
20*8b3672c5SNinad Palsule /* PSU uses default linear data format. */
21*8b3672c5SNinad Palsule .func[0] = PMBUS_HAVE_PIN | PMBUS_HAVE_IOUT |
22*8b3672c5SNinad Palsule PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_IIN |
23*8b3672c5SNinad Palsule PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT |
24*8b3672c5SNinad Palsule PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
25*8b3672c5SNinad Palsule PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
26*8b3672c5SNinad Palsule PMBUS_HAVE_STATUS_TEMP |
27*8b3672c5SNinad Palsule PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12,
28*8b3672c5SNinad Palsule };
29*8b3672c5SNinad Palsule
crps_probe(struct i2c_client * client)30*8b3672c5SNinad Palsule static int crps_probe(struct i2c_client *client)
31*8b3672c5SNinad Palsule {
32*8b3672c5SNinad Palsule int rc;
33*8b3672c5SNinad Palsule struct device *dev = &client->dev;
34*8b3672c5SNinad Palsule char buf[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
35*8b3672c5SNinad Palsule
36*8b3672c5SNinad Palsule rc = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
37*8b3672c5SNinad Palsule if (rc < 0)
38*8b3672c5SNinad Palsule return dev_err_probe(dev, rc, "Failed to read PMBUS_MFR_MODEL\n");
39*8b3672c5SNinad Palsule
40*8b3672c5SNinad Palsule if (rc != 7 || strncmp(buf, "03NK260", 7)) {
41*8b3672c5SNinad Palsule buf[rc] = '\0';
42*8b3672c5SNinad Palsule return dev_err_probe(dev, -ENODEV, "Model '%s' not supported\n", buf);
43*8b3672c5SNinad Palsule }
44*8b3672c5SNinad Palsule
45*8b3672c5SNinad Palsule rc = pmbus_do_probe(client, &crps_info);
46*8b3672c5SNinad Palsule if (rc)
47*8b3672c5SNinad Palsule return dev_err_probe(dev, rc, "Failed to probe\n");
48*8b3672c5SNinad Palsule
49*8b3672c5SNinad Palsule return 0;
50*8b3672c5SNinad Palsule }
51*8b3672c5SNinad Palsule
52*8b3672c5SNinad Palsule static const struct of_device_id crps_of_match[] = {
53*8b3672c5SNinad Palsule {
54*8b3672c5SNinad Palsule .compatible = "intel,crps185",
55*8b3672c5SNinad Palsule },
56*8b3672c5SNinad Palsule {}
57*8b3672c5SNinad Palsule };
58*8b3672c5SNinad Palsule MODULE_DEVICE_TABLE(of, crps_of_match);
59*8b3672c5SNinad Palsule
60*8b3672c5SNinad Palsule static struct i2c_driver crps_driver = {
61*8b3672c5SNinad Palsule .driver = {
62*8b3672c5SNinad Palsule .name = "crps",
63*8b3672c5SNinad Palsule .of_match_table = crps_of_match,
64*8b3672c5SNinad Palsule },
65*8b3672c5SNinad Palsule .probe = crps_probe,
66*8b3672c5SNinad Palsule .id_table = crps_id,
67*8b3672c5SNinad Palsule };
68*8b3672c5SNinad Palsule
69*8b3672c5SNinad Palsule module_i2c_driver(crps_driver);
70*8b3672c5SNinad Palsule
71*8b3672c5SNinad Palsule MODULE_AUTHOR("Ninad Palsule");
72*8b3672c5SNinad Palsule MODULE_DESCRIPTION("PMBus driver for Intel Common Redundant power supplies");
73*8b3672c5SNinad Palsule MODULE_LICENSE("GPL");
74*8b3672c5SNinad Palsule MODULE_IMPORT_NS("PMBUS");
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