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