// 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 because some devices report communication error
* ( invalid command ) for VOUT_MODE command ( 0 x20 ) although the correct
* VOUT_MODE ( 0 x16 ) is returned : it leads to incorrect exponent in linear
* mode .
* This affects both pfe3000 and pfe1100 .
*/
static struct pmbus_platform_data pfe_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;
client->dev.platform_data = &pfe_plat_data;
/*
* PFE3000 - 12 - 069 RA 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)
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 = 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" );
MODULE_IMPORT_NS("PMBUS" );
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