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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2023 IBM Corp.
*/
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/i2c.h>
#include <linux/minmax.h>
#include <linux/module.h>
#include <linux/pmbus.h>
#include <linux/hwmon-sysfs.h>
#include "pmbus.h"
#define ACBEL_MFR_FW_REVISION 0xd9
static ssize_t acbel_fsg032_debugfs_read(struct file *file, char __user *buf, size_t count,
loff_t *ppos)
{
struct i2c_client *client = file->private_data;
u8 data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
char out[8];
int rc;
rc = i2c_smbus_read_block_data(client, ACBEL_MFR_FW_REVISION, data);
if (rc < 0)
return rc;
rc = snprintf(out, sizeof(out), "%*phN\n", min(rc, 3), data);
return simple_read_from_buffer(buf, count, ppos, out, rc);
}
static const struct file_operations acbel_debugfs_ops = {
.llseek = noop_llseek,
.read = acbel_fsg032_debugfs_read,
.write = NULL,
.open = simple_open,
};
static void acbel_fsg032_init_debugfs(struct i2c_client *client)
{
struct dentry *debugfs = pmbus_get_debugfs_dir(client);
if (!debugfs)
return;
debugfs_create_file("fw_version", 0444, debugfs, client, &acbel_debugfs_ops);
}
static const struct i2c_device_id acbel_fsg032_id[] = {
{ "acbel_fsg032" },
{}
};
static struct pmbus_driver_info acbel_fsg032_info = {
.pages = 1,
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_PIN |
PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_TEMP |
PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_FAN12,
};
static int acbel_fsg032_probe(struct i2c_client *client)
{
u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
struct device *dev = &client->dev;
int rc;
rc = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
if (rc < 0) {
dev_err(dev, "Failed to read PMBUS_MFR_ID\n");
return rc;
}
if (strncmp(buf, "ACBEL", 5)) {
buf[rc] = '\0';
dev_err(dev, "Manufacturer '%s' not supported\n", buf);
return -ENODEV;
}
rc = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
if (rc < 0) {
dev_err(dev, "Failed to read PMBUS_MFR_MODEL\n");
return rc;
}
if (strncmp(buf, "FSG032", 6)) {
buf[rc] = '\0';
dev_err(dev, "Model '%s' not supported\n", buf);
return -ENODEV;
}
rc = pmbus_do_probe(client, &acbel_fsg032_info);
if (rc)
return rc;
acbel_fsg032_init_debugfs(client);
return 0;
}
static const struct of_device_id acbel_fsg032_of_match[] = {
{ .compatible = "acbel,fsg032" },
{}
};
MODULE_DEVICE_TABLE(of, acbel_fsg032_of_match);
static struct i2c_driver acbel_fsg032_driver = {
.driver = {
.name = "acbel-fsg032",
.of_match_table = acbel_fsg032_of_match,
},
.probe = acbel_fsg032_probe,
.id_table = acbel_fsg032_id,
};
module_i2c_driver(acbel_fsg032_driver);
MODULE_AUTHOR("Lakshmi Yadlapati");
MODULE_DESCRIPTION("PMBus driver for AcBel Power System power supplies");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(PMBUS);
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