drivers/hwmon/pmbus/crps.c
Source file repositories/reference/linux-study-clean/drivers/hwmon/pmbus/crps.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/hwmon/pmbus/crps.c- Extension
.c- Size
- 1735 bytes
- Lines
- 75
- Domain
- Driver Families
- Bucket
- drivers/hwmon
- Inferred role
- Driver Families: implementation source
- Status
- source implementation candidate
Why This File Exists
Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/i2c.hlinux/of.hlinux/pmbus.hpmbus.h
Detected Declarations
function crps_probe
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2024 IBM Corp.
*/
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/pmbus.h>
#include "pmbus.h"
static const struct i2c_device_id crps_id[] = {
{ .name = "intel_crps185" },
{ }
};
MODULE_DEVICE_TABLE(i2c, crps_id);
static struct pmbus_driver_info crps_info = {
.pages = 1,
/* PSU uses default linear data format. */
.func[0] = PMBUS_HAVE_PIN | PMBUS_HAVE_IOUT |
PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_IIN |
PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
PMBUS_HAVE_STATUS_TEMP |
PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12,
};
static int crps_probe(struct i2c_client *client)
{
int rc;
struct device *dev = &client->dev;
char buf[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
rc = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
if (rc < 0)
return dev_err_probe(dev, rc, "Failed to read PMBUS_MFR_MODEL\n");
if (rc != 7 || strncmp(buf, "03NK260", 7)) {
buf[rc] = '\0';
return dev_err_probe(dev, -ENODEV, "Model '%s' not supported\n", buf);
}
rc = pmbus_do_probe(client, &crps_info);
if (rc)
return dev_err_probe(dev, rc, "Failed to probe\n");
return 0;
}
static const struct of_device_id crps_of_match[] = {
{
.compatible = "intel,crps185",
},
{}
};
MODULE_DEVICE_TABLE(of, crps_of_match);
static struct i2c_driver crps_driver = {
.driver = {
.name = "crps",
.of_match_table = crps_of_match,
},
.probe = crps_probe,
.id_table = crps_id,
};
module_i2c_driver(crps_driver);
MODULE_AUTHOR("Ninad Palsule");
MODULE_DESCRIPTION("PMBus driver for Intel Common Redundant power supplies");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("PMBUS");
Annotation
- Immediate include surface: `linux/i2c.h`, `linux/of.h`, `linux/pmbus.h`, `pmbus.h`.
- Detected declarations: `function crps_probe`.
- Atlas domain: Driver Families / drivers/hwmon.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.