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// SPDX-License-Identifier: GPL-2.0+
/*
* Hardware monitoring driver for RAA229126
*
* Copyright (c) 2022 Intel Corporation.
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include "pmbus.h"
#define RAA229126_NUM_PAGES 2
static struct pmbus_driver_info raa229126_info = {
.pages = RAA229126_NUM_PAGES,
.format[PSC_VOLTAGE_IN] = direct,
.format[PSC_VOLTAGE_OUT] = direct,
.format[PSC_CURRENT_IN] = direct,
.format[PSC_CURRENT_OUT] = direct,
.format[PSC_TEMPERATURE] = direct,
.format[PSC_POWER] = direct,
.m[PSC_TEMPERATURE] = 1,
.m[PSC_VOLTAGE_OUT] = 1,
.R[PSC_VOLTAGE_OUT] = 3,
.m[PSC_CURRENT_OUT] = 1,
.m[PSC_POWER] = 1,
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN |
PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_STATUS_TEMP,
.func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN |
PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_STATUS_TEMP,
};
static int raa229126_probe(struct i2c_client *client)
{
struct pmbus_driver_info *info;
u8 buf[I2C_SMBUS_BLOCK_MAX];
int ret;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_BYTE_DATA |
I2C_FUNC_SMBUS_READ_WORD_DATA |
I2C_FUNC_SMBUS_READ_BLOCK_DATA))
return -ENODEV;
/* Read Manufacturer id */
ret = i2c_smbus_read_block_data(client, PMBUS_IC_DEVICE_ID, buf);
if (ret < 0) {
dev_err(&client->dev, "Failed to read PMBUS_IC_DEVICE_ID\n");
return ret;
}
if (ret != 4 || strncmp(buf, "\x00\x82\xd2\x49", 4)) {
dev_err(&client->dev, "DEVICE_ID unrecognized\n");
return -ENODEV;
}
info = devm_kmemdup(&client->dev, &raa229126_info, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
return pmbus_do_probe(client, info);
}
static const struct i2c_device_id raa229126_id[] = {
{"raa229126", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, raa229126_id);
static struct i2c_driver raa229126_driver = {
.driver = {
.name = "raa229126",
},
.probe_new = raa229126_probe,
.id_table = raa229126_id,
};
module_i2c_driver(raa229126_driver);
MODULE_AUTHOR("Zhikui Ren <zhikui.ren@intel.com>");
MODULE_DESCRIPTION("PMBus driver for Renesas RAA229126");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(PMBUS);
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