You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
151 lines
3.7 KiB
151 lines
3.7 KiB
/*
|
|
* Copyright 2017 IBM Corp.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/device.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/module.h>
|
|
|
|
#include "pmbus.h"
|
|
|
|
/* STATUS_MFR_SPECIFIC bits */
|
|
#define CFFPS_MFR_FAN_FAULT BIT(0)
|
|
#define CFFPS_MFR_THERMAL_FAULT BIT(1)
|
|
#define CFFPS_MFR_OV_FAULT BIT(2)
|
|
#define CFFPS_MFR_UV_FAULT BIT(3)
|
|
#define CFFPS_MFR_PS_KILL BIT(4)
|
|
#define CFFPS_MFR_OC_FAULT BIT(5)
|
|
#define CFFPS_MFR_VAUX_FAULT BIT(6)
|
|
#define CFFPS_MFR_CURRENT_SHARE_WARNING BIT(7)
|
|
|
|
static int ibm_cffps_read_byte_data(struct i2c_client *client, int page,
|
|
int reg)
|
|
{
|
|
int rc, mfr;
|
|
|
|
switch (reg) {
|
|
case PMBUS_STATUS_VOUT:
|
|
case PMBUS_STATUS_IOUT:
|
|
case PMBUS_STATUS_TEMPERATURE:
|
|
case PMBUS_STATUS_FAN_12:
|
|
rc = pmbus_read_byte_data(client, page, reg);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
mfr = pmbus_read_byte_data(client, page,
|
|
PMBUS_STATUS_MFR_SPECIFIC);
|
|
if (mfr < 0)
|
|
/*
|
|
* Return the status register instead of an error,
|
|
* since we successfully read status.
|
|
*/
|
|
return rc;
|
|
|
|
/* Add MFR_SPECIFIC bits to the standard pmbus status regs. */
|
|
if (reg == PMBUS_STATUS_FAN_12) {
|
|
if (mfr & CFFPS_MFR_FAN_FAULT)
|
|
rc |= PB_FAN_FAN1_FAULT;
|
|
} else if (reg == PMBUS_STATUS_TEMPERATURE) {
|
|
if (mfr & CFFPS_MFR_THERMAL_FAULT)
|
|
rc |= PB_TEMP_OT_FAULT;
|
|
} else if (reg == PMBUS_STATUS_VOUT) {
|
|
if (mfr & (CFFPS_MFR_OV_FAULT | CFFPS_MFR_VAUX_FAULT))
|
|
rc |= PB_VOLTAGE_OV_FAULT;
|
|
if (mfr & CFFPS_MFR_UV_FAULT)
|
|
rc |= PB_VOLTAGE_UV_FAULT;
|
|
} else if (reg == PMBUS_STATUS_IOUT) {
|
|
if (mfr & CFFPS_MFR_OC_FAULT)
|
|
rc |= PB_IOUT_OC_FAULT;
|
|
if (mfr & CFFPS_MFR_CURRENT_SHARE_WARNING)
|
|
rc |= PB_CURRENT_SHARE_FAULT;
|
|
}
|
|
break;
|
|
default:
|
|
rc = -ENODATA;
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int ibm_cffps_read_word_data(struct i2c_client *client, int page,
|
|
int reg)
|
|
{
|
|
int rc, mfr;
|
|
|
|
switch (reg) {
|
|
case PMBUS_STATUS_WORD:
|
|
rc = pmbus_read_word_data(client, page, reg);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
mfr = pmbus_read_byte_data(client, page,
|
|
PMBUS_STATUS_MFR_SPECIFIC);
|
|
if (mfr < 0)
|
|
/*
|
|
* Return the status register instead of an error,
|
|
* since we successfully read status.
|
|
*/
|
|
return rc;
|
|
|
|
if (mfr & CFFPS_MFR_PS_KILL)
|
|
rc |= PB_STATUS_OFF;
|
|
break;
|
|
default:
|
|
rc = -ENODATA;
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static struct pmbus_driver_info ibm_cffps_info = {
|
|
.pages = 1,
|
|
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
|
|
PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
|
|
PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_VOUT |
|
|
PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT |
|
|
PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_FAN12,
|
|
.read_byte_data = ibm_cffps_read_byte_data,
|
|
.read_word_data = ibm_cffps_read_word_data,
|
|
};
|
|
|
|
static int ibm_cffps_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
return pmbus_do_probe(client, id, &ibm_cffps_info);
|
|
}
|
|
|
|
static const struct i2c_device_id ibm_cffps_id[] = {
|
|
{ "ibm_cffps1", 1 },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, ibm_cffps_id);
|
|
|
|
static const struct of_device_id ibm_cffps_of_match[] = {
|
|
{ .compatible = "ibm,cffps1" },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ibm_cffps_of_match);
|
|
|
|
static struct i2c_driver ibm_cffps_driver = {
|
|
.driver = {
|
|
.name = "ibm-cffps",
|
|
.of_match_table = ibm_cffps_of_match,
|
|
},
|
|
.probe = ibm_cffps_probe,
|
|
.remove = pmbus_do_remove,
|
|
.id_table = ibm_cffps_id,
|
|
};
|
|
|
|
module_i2c_driver(ibm_cffps_driver);
|
|
|
|
MODULE_AUTHOR("Eddie James");
|
|
MODULE_DESCRIPTION("PMBus driver for IBM Common Form Factor power supplies");
|
|
MODULE_LICENSE("GPL");
|
|
|