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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for MPS MPQ8785 Step-Down Converter
*/
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include "pmbus.h"
static int mpq8785_identify(struct i2c_client *client,
struct pmbus_driver_info *info)
{
int vout_mode;
vout_mode = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE);
if (vout_mode < 0 || vout_mode == 0xff)
return vout_mode < 0 ? vout_mode : -ENODEV;
switch (vout_mode >> 5) {
case 0:
info->format[PSC_VOLTAGE_OUT] = linear;
break;
case 1:
case 2:
info->format[PSC_VOLTAGE_OUT] = direct;
info->m[PSC_VOLTAGE_OUT] = 64;
info->b[PSC_VOLTAGE_OUT] = 0;
info->R[PSC_VOLTAGE_OUT] = 1;
break;
default:
return -ENODEV;
}
return 0;
};
static struct pmbus_driver_info mpq8785_info = {
.pages = 1,
.format[PSC_VOLTAGE_IN] = direct,
.format[PSC_CURRENT_OUT] = direct,
.format[PSC_TEMPERATURE] = direct,
.m[PSC_VOLTAGE_IN] = 4,
.b[PSC_VOLTAGE_IN] = 0,
.R[PSC_VOLTAGE_IN] = 1,
.m[PSC_CURRENT_OUT] = 16,
.b[PSC_CURRENT_OUT] = 0,
.R[PSC_CURRENT_OUT] = 0,
.m[PSC_TEMPERATURE] = 1,
.b[PSC_TEMPERATURE] = 0,
.R[PSC_TEMPERATURE] = 0,
.func[0] =
PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
.identify = mpq8785_identify,
};
static int mpq8785_probe(struct i2c_client *client)
{
return pmbus_do_probe(client, &mpq8785_info);
};
static const struct i2c_device_id mpq8785_id[] = {
{ "mpq8785" },
{ },
};
MODULE_DEVICE_TABLE(i2c, mpq8785_id);
static const struct of_device_id __maybe_unused mpq8785_of_match[] = {
{ .compatible = "mps,mpq8785" },
{}
};
MODULE_DEVICE_TABLE(of, mpq8785_of_match);
static struct i2c_driver mpq8785_driver = {
.driver = {
.name = "mpq8785",
.of_match_table = of_match_ptr(mpq8785_of_match),
},
.probe = mpq8785_probe,
.id_table = mpq8785_id,
};
module_i2c_driver(mpq8785_driver);
MODULE_AUTHOR("Charles Hsu <ythsu0511@gmail.com>");
MODULE_DESCRIPTION("PMBus driver for MPS MPQ8785");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("PMBUS");
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