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// SPDX-License-Identifier: GPL-2.0+
/*
* Hardware monitoring driver for BEL PFE family power supplies.
*
* Copyright (c) 2019 Facebook Inc.
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pmbus.h>
#include "pmbus.h"
enum chips {pfe1100, pfe3000};
/*
* Disable status check for pfe3000 devices, because some devices report
* communication error (invalid command) for VOUT_MODE command (0x20)
* although correct VOUT_MODE (0x16) is returned: it leads to incorrect
* exponent in linear mode.
*/
static struct pmbus_platform_data pfe3000_plat_data = {
.flags = PMBUS_SKIP_STATUS_CHECK,
};
static struct pmbus_driver_info pfe_driver_info[] = {
[pfe1100] = {
.pages = 1,
.format[PSC_VOLTAGE_IN] = linear,
.format[PSC_VOLTAGE_OUT] = linear,
.format[PSC_CURRENT_IN] = linear,
.format[PSC_CURRENT_OUT] = linear,
.format[PSC_POWER] = linear,
.format[PSC_TEMPERATURE] = linear,
.format[PSC_FAN] = linear,
.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_POUT |
PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |
PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
PMBUS_HAVE_STATUS_TEMP |
PMBUS_HAVE_FAN12,
},
[pfe3000] = {
.pages = 7,
.format[PSC_VOLTAGE_IN] = linear,
.format[PSC_VOLTAGE_OUT] = linear,
.format[PSC_CURRENT_IN] = linear,
.format[PSC_CURRENT_OUT] = linear,
.format[PSC_POWER] = linear,
.format[PSC_TEMPERATURE] = linear,
.format[PSC_FAN] = linear,
/* Page 0: V1. */
.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_POUT | PMBUS_HAVE_FAN12 |
PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |
PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_TEMP |
PMBUS_HAVE_VCAP,
/* Page 1: Vsb. */
.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_POUT,
/*
* Page 2: V1 Ishare.
* Page 3: Reserved.
* Page 4: V1 Cathode.
* Page 5: Vsb Cathode.
* Page 6: V1 Sense.
*/
.func[2] = PMBUS_HAVE_VOUT,
.func[4] = PMBUS_HAVE_VOUT,
.func[5] = PMBUS_HAVE_VOUT,
.func[6] = PMBUS_HAVE_VOUT,
},
};
static const struct i2c_device_id pfe_device_id[];
static int pfe_pmbus_probe(struct i2c_client *client)
{
int model;
model = (int)i2c_match_id(pfe_device_id, client)->driver_data;
/*
* PFE3000-12-069RA devices may not stay in page 0 during device
* probe which leads to probe failure (read status word failed).
* So let's set the device to page 0 at the beginning.
*/
if (model == pfe3000) {
client->dev.platform_data = &pfe3000_plat_data;
i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
}
return pmbus_do_probe(client, &pfe_driver_info[model]);
}
static const struct i2c_device_id pfe_device_id[] = {
{"pfe1100", pfe1100},
{"pfe3000", pfe3000},
{}
};
MODULE_DEVICE_TABLE(i2c, pfe_device_id);
static struct i2c_driver pfe_pmbus_driver = {
.driver = {
.name = "bel-pfe",
},
.probe_new = pfe_pmbus_probe,
.id_table = pfe_device_id,
};
module_i2c_driver(pfe_pmbus_driver);
MODULE_AUTHOR("Tao Ren <rentao.bupt@gmail.com>");
MODULE_DESCRIPTION("PMBus driver for BEL PFE Family Power Supplies");
MODULE_LICENSE("GPL");
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