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// SPDX-License-Identifier: GPL-2.0+
/*
* Hardware monitoring driver for Infineon Multi-phase Digital XDPE1A2G5B
* and XDPE1A2G7B Controllers
*
* Copyright (c) 2026 Infineon Technologies. All rights reserved.
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include "pmbus.h"
#define XDPE1A2G7B_PAGE_NUM 2
#define XDPE1A2G7B_NVIDIA_195MV 0x1E /* NVIDIA mode 1.95mV, VID step is 5mV */
static int xdpe1a2g7b_identify(struct i2c_client *client,
struct pmbus_driver_info *info)
{
u8 vout_params;
int vout_mode;
/*
* XDPE1A2G5B and XDPE1A2G7B support both Linear and NVIDIA PWM VID data
* formats via VOUT_MODE. Note that the device pages/loops are not fully
* independent: configuration is shared, so programming each page/loop
* separately is not supported.
*/
vout_mode = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE);
if (vout_mode < 0)
return vout_mode;
switch (vout_mode >> 5) {
case 0:
info->format[PSC_VOLTAGE_OUT] = linear;
return 0;
case 1:
info->format[PSC_VOLTAGE_OUT] = vid;
vout_params = vout_mode & GENMASK(4, 0);
/* Check for VID Code Type */
switch (vout_params) {
case XDPE1A2G7B_NVIDIA_195MV:
/* VID vrm_version for PAGE0 and PAGE1 */
info->vrm_version[0] = nvidia195mv;
info->vrm_version[1] = nvidia195mv;
break;
default:
return -EINVAL;
}
break;
default:
return -ENODEV;
}
return 0;
}
static struct pmbus_driver_info xdpe1a2g7b_info = {
.pages = XDPE1A2G7B_PAGE_NUM,
.identify = xdpe1a2g7b_identify,
.format[PSC_VOLTAGE_IN] = linear,
.format[PSC_TEMPERATURE] = linear,
.format[PSC_CURRENT_IN] = linear,
.format[PSC_CURRENT_OUT] = linear,
.format[PSC_POWER] = linear,
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_STATUS_TEMP |
PMBUS_HAVE_POUT | PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT,
.func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | PMBUS_HAVE_STATUS_INPUT,
};
static int xdpe1a2g7b_probe(struct i2c_client *client)
{
struct pmbus_driver_info *info;
info = devm_kmemdup(&client->dev, &xdpe1a2g7b_info, sizeof(*info),
GFP_KERNEL);
if (!info)
return -ENOMEM;
return pmbus_do_probe(client, info);
}
static const struct i2c_device_id xdpe1a2g7b_id[] = {
{ "xdpe1a2g5b" },
{ "xdpe1a2g7b" },
{}
};
MODULE_DEVICE_TABLE(i2c, xdpe1a2g7b_id);
static const struct of_device_id __maybe_unused xdpe1a2g7b_of_match[] = {
{ .compatible = "infineon,xdpe1a2g5b" },
{ .compatible = "infineon,xdpe1a2g7b" },
{}
};
MODULE_DEVICE_TABLE(of, xdpe1a2g7b_of_match);
static struct i2c_driver xdpe1a2g7b_driver = {
.driver = {
.name = "xdpe1a2g7b",
.of_match_table = of_match_ptr(xdpe1a2g7b_of_match),
},
.probe = xdpe1a2g7b_probe,
.id_table = xdpe1a2g7b_id,
};
module_i2c_driver(xdpe1a2g7b_driver);
MODULE_AUTHOR("Ashish Yadav <ashish.yadav@infineon.com>");
MODULE_DESCRIPTION("PMBus driver for Infineon XDPE1A2G5B/7B");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("PMBUS");
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