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[devices]: Add HLX a dps200 psu driver (#2871)

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This commit is contained in:
Pradchaya Phucharoen 2019-05-09 14:05:21 +07:00 committed by lguohan
parent 5fb185cd83
commit 999ec0a7f2
4 changed files with 558 additions and 1 deletions
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4
platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-haliburton.init
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@ -17,6 +17,7 @@ start)
modprobe smc
modprobe hlx_gpio_ich
modprobe dps200
found=0
for devnum in 0 1; do
@ -51,6 +52,9 @@ start)
echo max6697 0x1a > /sys/bus/i2c/devices/i2c-3/new_device
echo max6697 0x1a > /sys/bus/i2c/devices/i2c-11/new_device
# Attach PSUs
echo dps200 0x5a > /sys/bus/i2c/devices/i2c-12/new_device
echo dps200 0x5b > /sys/bus/i2c/devices/i2c-13/new_device
# Attach fans
echo emc2305 0x4d > /sys/bus/i2c/devices/i2c-23/new_device

2
platform/broadcom/sonic-platform-modules-cel/haliburton/modules/Makefile
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@ -1 +1 @@
obj-m := mc24lc64t.o emc2305.o smc.o hlx_gpio_ich.o
obj-m := mc24lc64t.o emc2305.o smc.o hlx_gpio_ich.o dps200.o

128
platform/broadcom/sonic-platform-modules-cel/haliburton/modules/dps200.c Normal file
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@ -0,0 +1,128 @@
/*
* Hardware monitoring driver for Delta DPS200
*
* (C) Copyright 2019, Celestica Inc.
* Author: Pradchaya Phucharoen <pphuchar@celestica.com>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/i2c.h>
#include <linux/i2c/pmbus.h>
#include "pmbus.h"
static int dps200_read_word_data(struct i2c_client *client, int page, int reg)
{
if (reg >= PMBUS_VIRT_BASE ||
reg == PMBUS_VOUT_OV_FAULT_LIMIT ||
reg == PMBUS_VOUT_OV_WARN_LIMIT ||
reg == PMBUS_VOUT_UV_WARN_LIMIT ||
reg == PMBUS_VOUT_UV_FAULT_LIMIT ||
reg == PMBUS_IOUT_OC_LV_FAULT_LIMIT ||
reg == PMBUS_IOUT_UC_FAULT_LIMIT ||
reg == PMBUS_UT_WARN_LIMIT ||
reg == PMBUS_UT_FAULT_LIMIT ||
reg == PMBUS_VIN_OV_FAULT_LIMIT ||
reg == PMBUS_VIN_OV_WARN_LIMIT ||
reg == PMBUS_IIN_OC_FAULT_LIMIT ||
reg == PMBUS_POUT_MAX)
return -ENXIO;
/*
* WARNING: The following feild have coinstant driver value.
* If the register are
* PMBUS_IOUT_OC_WARN_LIMIT or PMBUS_IOUT_OC_FAULT_LIMIT convert
* the constant value from linear to direct fomat.
*/
if (reg == PMBUS_IOUT_OC_WARN_LIMIT)
return 0xb4;
else if (reg == PMBUS_IOUT_OC_FAULT_LIMIT)
return 0xc8;
else
return pmbus_read_word_data(client, page, reg);
}
/*
* Form DPS-200 datasheet the supported sensors format defined as:
* VOUT: direct mode with one decimal place.
*
* Other sensors:
* IOUT: direct mode with one decimal place.
* IOUT Limits: linear mode, which difference from IOUT.
* VIN, IIN, POWER, TEMP, & FAN: linear mode.
*/
static struct pmbus_driver_info dps200_info = {
.pages = 1,
.func[0] = 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_FAN12 | PMBUS_HAVE_STATUS_FAN12
| PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_TEMP
| PMBUS_HAVE_STATUS_INPUT,
.format = {
[PSC_VOLTAGE_OUT] = direct,
[PSC_CURRENT_OUT] = direct,
},
.m = {
[PSC_VOLTAGE_OUT] = 10,
[PSC_CURRENT_OUT] = 10,
},
.b = {
[PSC_VOLTAGE_OUT] = 0,
[PSC_CURRENT_OUT] = 0,
},
.R = {
[PSC_VOLTAGE_OUT] = 0,
[PSC_CURRENT_OUT] = 0,
},
.read_word_data = &dps200_read_word_data,
};
static int pmbus_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
return pmbus_do_probe(client, id, &dps200_info);
}
/* user driver datat to pass the grpup */
static const struct i2c_device_id dps200_id[] = {
{"dps200", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, dps200_id);
/* This is the driver that will be inserted */
static struct i2c_driver dps200_driver = {
.driver = {
.name = "dps200",
},
.probe = pmbus_probe,
.remove = pmbus_do_remove,
.id_table = dps200_id,
};
module_i2c_driver(dps200_driver);
MODULE_AUTHOR("Pradchaya Phucharoen");
MODULE_DESCRIPTION("PMBus driver for Delta DPS200");
MODULE_LICENSE("GPL");

425
platform/broadcom/sonic-platform-modules-cel/haliburton/modules/pmbus.h Normal file
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@ -0,0 +1,425 @@
/*
* pmbus.h - Common defines and structures for PMBus devices
*
* Copyright (c) 2010, 2011 Ericsson AB.
* Copyright (c) 2012 Guenter Roeck
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef PMBUS_H
#define PMBUS_H
#include <linux/bitops.h>
#include <linux/regulator/driver.h>
/*
* Registers
*/
enum pmbus_regs {
PMBUS_PAGE = 0x00,
PMBUS_OPERATION = 0x01,
PMBUS_ON_OFF_CONFIG = 0x02,
PMBUS_CLEAR_FAULTS = 0x03,
PMBUS_PHASE = 0x04,
PMBUS_CAPABILITY = 0x19,
PMBUS_QUERY = 0x1A,
PMBUS_VOUT_MODE = 0x20,
PMBUS_VOUT_COMMAND = 0x21,
PMBUS_VOUT_TRIM = 0x22,
PMBUS_VOUT_CAL_OFFSET = 0x23,
PMBUS_VOUT_MAX = 0x24,
PMBUS_VOUT_MARGIN_HIGH = 0x25,
PMBUS_VOUT_MARGIN_LOW = 0x26,
PMBUS_VOUT_TRANSITION_RATE = 0x27,
PMBUS_VOUT_DROOP = 0x28,
PMBUS_VOUT_SCALE_LOOP = 0x29,
PMBUS_VOUT_SCALE_MONITOR = 0x2A,
PMBUS_COEFFICIENTS = 0x30,
PMBUS_POUT_MAX = 0x31,
PMBUS_FAN_CONFIG_12 = 0x3A,
PMBUS_FAN_COMMAND_1 = 0x3B,
PMBUS_FAN_COMMAND_2 = 0x3C,
PMBUS_FAN_CONFIG_34 = 0x3D,
PMBUS_FAN_COMMAND_3 = 0x3E,
PMBUS_FAN_COMMAND_4 = 0x3F,
PMBUS_VOUT_OV_FAULT_LIMIT = 0x40,
PMBUS_VOUT_OV_FAULT_RESPONSE = 0x41,
PMBUS_VOUT_OV_WARN_LIMIT = 0x42,
PMBUS_VOUT_UV_WARN_LIMIT = 0x43,
PMBUS_VOUT_UV_FAULT_LIMIT = 0x44,
PMBUS_VOUT_UV_FAULT_RESPONSE = 0x45,
PMBUS_IOUT_OC_FAULT_LIMIT = 0x46,
PMBUS_IOUT_OC_FAULT_RESPONSE = 0x47,
PMBUS_IOUT_OC_LV_FAULT_LIMIT = 0x48,
PMBUS_IOUT_OC_LV_FAULT_RESPONSE = 0x49,
PMBUS_IOUT_OC_WARN_LIMIT = 0x4A,
PMBUS_IOUT_UC_FAULT_LIMIT = 0x4B,
PMBUS_IOUT_UC_FAULT_RESPONSE = 0x4C,
PMBUS_OT_FAULT_LIMIT = 0x4F,
PMBUS_OT_FAULT_RESPONSE = 0x50,
PMBUS_OT_WARN_LIMIT = 0x51,
PMBUS_UT_WARN_LIMIT = 0x52,
PMBUS_UT_FAULT_LIMIT = 0x53,
PMBUS_UT_FAULT_RESPONSE = 0x54,
PMBUS_VIN_OV_FAULT_LIMIT = 0x55,
PMBUS_VIN_OV_FAULT_RESPONSE = 0x56,
PMBUS_VIN_OV_WARN_LIMIT = 0x57,
PMBUS_VIN_UV_WARN_LIMIT = 0x58,
PMBUS_VIN_UV_FAULT_LIMIT = 0x59,
PMBUS_IIN_OC_FAULT_LIMIT = 0x5B,
PMBUS_IIN_OC_WARN_LIMIT = 0x5D,
PMBUS_POUT_OP_FAULT_LIMIT = 0x68,
PMBUS_POUT_OP_WARN_LIMIT = 0x6A,
PMBUS_PIN_OP_WARN_LIMIT = 0x6B,
PMBUS_STATUS_BYTE = 0x78,
PMBUS_STATUS_WORD = 0x79,
PMBUS_STATUS_VOUT = 0x7A,
PMBUS_STATUS_IOUT = 0x7B,
PMBUS_STATUS_INPUT = 0x7C,
PMBUS_STATUS_TEMPERATURE = 0x7D,
PMBUS_STATUS_CML = 0x7E,
PMBUS_STATUS_OTHER = 0x7F,
PMBUS_STATUS_MFR_SPECIFIC = 0x80,
PMBUS_STATUS_FAN_12 = 0x81,
PMBUS_STATUS_FAN_34 = 0x82,
PMBUS_READ_VIN = 0x88,
PMBUS_READ_IIN = 0x89,
PMBUS_READ_VCAP = 0x8A,
PMBUS_READ_VOUT = 0x8B,
PMBUS_READ_IOUT = 0x8C,
PMBUS_READ_TEMPERATURE_1 = 0x8D,
PMBUS_READ_TEMPERATURE_2 = 0x8E,
PMBUS_READ_TEMPERATURE_3 = 0x8F,
PMBUS_READ_FAN_SPEED_1 = 0x90,
PMBUS_READ_FAN_SPEED_2 = 0x91,
PMBUS_READ_FAN_SPEED_3 = 0x92,
PMBUS_READ_FAN_SPEED_4 = 0x93,
PMBUS_READ_DUTY_CYCLE = 0x94,
PMBUS_READ_FREQUENCY = 0x95,
PMBUS_READ_POUT = 0x96,
PMBUS_READ_PIN = 0x97,
PMBUS_REVISION = 0x98,
PMBUS_MFR_ID = 0x99,
PMBUS_MFR_MODEL = 0x9A,
PMBUS_MFR_REVISION = 0x9B,
PMBUS_MFR_LOCATION = 0x9C,
PMBUS_MFR_DATE = 0x9D,
PMBUS_MFR_SERIAL = 0x9E,
/*
* Virtual registers.
* Useful to support attributes which are not supported by standard PMBus
* registers but exist as manufacturer specific registers on individual chips.
* Must be mapped to real registers in device specific code.
*
* Semantics:
* Virtual registers are all word size.
* READ registers are read-only; writes are either ignored or return an error.
* RESET registers are read/write. Reading reset registers returns zero
* (used for detection), writing any value causes the associated history to be
* reset.
* Virtual registers have to be handled in device specific driver code. Chip
* driver code returns non-negative register values if a virtual register is
* supported, or a negative error code if not. The chip driver may return
* -ENODATA or any other error code in this case, though an error code other
* than -ENODATA is handled more efficiently and thus preferred. Either case,
* the calling PMBus core code will abort if the chip driver returns an error
* code when reading or writing virtual registers.
*/
PMBUS_VIRT_BASE = 0x100,
PMBUS_VIRT_READ_TEMP_AVG,
PMBUS_VIRT_READ_TEMP_MIN,
PMBUS_VIRT_READ_TEMP_MAX,
PMBUS_VIRT_RESET_TEMP_HISTORY,
PMBUS_VIRT_READ_VIN_AVG,
PMBUS_VIRT_READ_VIN_MIN,
PMBUS_VIRT_READ_VIN_MAX,
PMBUS_VIRT_RESET_VIN_HISTORY,
PMBUS_VIRT_READ_IIN_AVG,
PMBUS_VIRT_READ_IIN_MIN,
PMBUS_VIRT_READ_IIN_MAX,
PMBUS_VIRT_RESET_IIN_HISTORY,
PMBUS_VIRT_READ_PIN_AVG,
PMBUS_VIRT_READ_PIN_MIN,
PMBUS_VIRT_READ_PIN_MAX,
PMBUS_VIRT_RESET_PIN_HISTORY,
PMBUS_VIRT_READ_POUT_AVG,
PMBUS_VIRT_READ_POUT_MIN,
PMBUS_VIRT_READ_POUT_MAX,
PMBUS_VIRT_RESET_POUT_HISTORY,
PMBUS_VIRT_READ_VOUT_AVG,
PMBUS_VIRT_READ_VOUT_MIN,
PMBUS_VIRT_READ_VOUT_MAX,
PMBUS_VIRT_RESET_VOUT_HISTORY,
PMBUS_VIRT_READ_IOUT_AVG,
PMBUS_VIRT_READ_IOUT_MIN,
PMBUS_VIRT_READ_IOUT_MAX,
PMBUS_VIRT_RESET_IOUT_HISTORY,
PMBUS_VIRT_READ_TEMP2_AVG,
PMBUS_VIRT_READ_TEMP2_MIN,
PMBUS_VIRT_READ_TEMP2_MAX,
PMBUS_VIRT_RESET_TEMP2_HISTORY,
PMBUS_VIRT_READ_VMON,
PMBUS_VIRT_VMON_UV_WARN_LIMIT,
PMBUS_VIRT_VMON_OV_WARN_LIMIT,
PMBUS_VIRT_VMON_UV_FAULT_LIMIT,
PMBUS_VIRT_VMON_OV_FAULT_LIMIT,
PMBUS_VIRT_STATUS_VMON,
};
/*
* OPERATION
*/
#define PB_OPERATION_CONTROL_ON BIT(7)
/*
* CAPABILITY
*/
#define PB_CAPABILITY_SMBALERT BIT(4)
#define PB_CAPABILITY_ERROR_CHECK BIT(7)
/*
* VOUT_MODE
*/
#define PB_VOUT_MODE_MODE_MASK 0xe0
#define PB_VOUT_MODE_PARAM_MASK 0x1f
#define PB_VOUT_MODE_LINEAR 0x00
#define PB_VOUT_MODE_VID 0x20
#define PB_VOUT_MODE_DIRECT 0x40
/*
* Fan configuration
*/
#define PB_FAN_2_PULSE_MASK (BIT(0) | BIT(1))
#define PB_FAN_2_RPM BIT(2)
#define PB_FAN_2_INSTALLED BIT(3)
#define PB_FAN_1_PULSE_MASK (BIT(4) | BIT(5))
#define PB_FAN_1_RPM BIT(6)
#define PB_FAN_1_INSTALLED BIT(7)
/*
* STATUS_BYTE, STATUS_WORD (lower)
*/
#define PB_STATUS_NONE_ABOVE BIT(0)
#define PB_STATUS_CML BIT(1)
#define PB_STATUS_TEMPERATURE BIT(2)
#define PB_STATUS_VIN_UV BIT(3)
#define PB_STATUS_IOUT_OC BIT(4)
#define PB_STATUS_VOUT_OV BIT(5)
#define PB_STATUS_OFF BIT(6)
#define PB_STATUS_BUSY BIT(7)
/*
* STATUS_WORD (upper)
*/
#define PB_STATUS_UNKNOWN BIT(8)
#define PB_STATUS_OTHER BIT(9)
#define PB_STATUS_FANS BIT(10)
#define PB_STATUS_POWER_GOOD_N BIT(11)
#define PB_STATUS_WORD_MFR BIT(12)
#define PB_STATUS_INPUT BIT(13)
#define PB_STATUS_IOUT_POUT BIT(14)
#define PB_STATUS_VOUT BIT(15)
/*
* STATUS_IOUT
*/
#define PB_POUT_OP_WARNING BIT(0)
#define PB_POUT_OP_FAULT BIT(1)
#define PB_POWER_LIMITING BIT(2)
#define PB_CURRENT_SHARE_FAULT BIT(3)
#define PB_IOUT_UC_FAULT BIT(4)
#define PB_IOUT_OC_WARNING BIT(5)
#define PB_IOUT_OC_LV_FAULT BIT(6)
#define PB_IOUT_OC_FAULT BIT(7)
/*
* STATUS_VOUT, STATUS_INPUT
*/
#define PB_VOLTAGE_UV_FAULT BIT(4)
#define PB_VOLTAGE_UV_WARNING BIT(5)
#define PB_VOLTAGE_OV_WARNING BIT(6)
#define PB_VOLTAGE_OV_FAULT BIT(7)
/*
* STATUS_INPUT
*/
#define PB_PIN_OP_WARNING BIT(0)
#define PB_IIN_OC_WARNING BIT(1)
#define PB_IIN_OC_FAULT BIT(2)
/*
* STATUS_TEMPERATURE
*/
#define PB_TEMP_UT_FAULT BIT(4)
#define PB_TEMP_UT_WARNING BIT(5)
#define PB_TEMP_OT_WARNING BIT(6)
#define PB_TEMP_OT_FAULT BIT(7)
/*
* STATUS_FAN
*/
#define PB_FAN_AIRFLOW_WARNING BIT(0)
#define PB_FAN_AIRFLOW_FAULT BIT(1)
#define PB_FAN_FAN2_SPEED_OVERRIDE BIT(2)
#define PB_FAN_FAN1_SPEED_OVERRIDE BIT(3)
#define PB_FAN_FAN2_WARNING BIT(4)
#define PB_FAN_FAN1_WARNING BIT(5)
#define PB_FAN_FAN2_FAULT BIT(6)
#define PB_FAN_FAN1_FAULT BIT(7)
/*
* CML_FAULT_STATUS
*/
#define PB_CML_FAULT_OTHER_MEM_LOGIC BIT(0)
#define PB_CML_FAULT_OTHER_COMM BIT(1)
#define PB_CML_FAULT_PROCESSOR BIT(3)
#define PB_CML_FAULT_MEMORY BIT(4)
#define PB_CML_FAULT_PACKET_ERROR BIT(5)
#define PB_CML_FAULT_INVALID_DATA BIT(6)
#define PB_CML_FAULT_INVALID_COMMAND BIT(7)
enum pmbus_sensor_classes {
PSC_VOLTAGE_IN = 0,
PSC_VOLTAGE_OUT,
PSC_CURRENT_IN,
PSC_CURRENT_OUT,
PSC_POWER,
PSC_TEMPERATURE,
PSC_FAN,
PSC_NUM_CLASSES /* Number of power sensor classes */
};
#define PMBUS_PAGES 32 /* Per PMBus specification */
/* Functionality bit mask */
#define PMBUS_HAVE_VIN BIT(0)
#define PMBUS_HAVE_VCAP BIT(1)
#define PMBUS_HAVE_VOUT BIT(2)
#define PMBUS_HAVE_IIN BIT(3)
#define PMBUS_HAVE_IOUT BIT(4)
#define PMBUS_HAVE_PIN BIT(5)
#define PMBUS_HAVE_POUT BIT(6)
#define PMBUS_HAVE_FAN12 BIT(7)
#define PMBUS_HAVE_FAN34 BIT(8)
#define PMBUS_HAVE_TEMP BIT(9)
#define PMBUS_HAVE_TEMP2 BIT(10)
#define PMBUS_HAVE_TEMP3 BIT(11)
#define PMBUS_HAVE_STATUS_VOUT BIT(12)
#define PMBUS_HAVE_STATUS_IOUT BIT(13)
#define PMBUS_HAVE_STATUS_INPUT BIT(14)
#define PMBUS_HAVE_STATUS_TEMP BIT(15)
#define PMBUS_HAVE_STATUS_FAN12 BIT(16)
#define PMBUS_HAVE_STATUS_FAN34 BIT(17)
#define PMBUS_HAVE_VMON BIT(18)
#define PMBUS_HAVE_STATUS_VMON BIT(19)
enum pmbus_data_format { linear = 0, direct, vid };
enum vrm_version { vr11 = 0, vr12 };
struct pmbus_driver_info {
int pages; /* Total number of pages */
enum pmbus_data_format format[PSC_NUM_CLASSES];
enum vrm_version vrm_version;
/*
* Support one set of coefficients for each sensor type
* Used for chips providing data in direct mode.
*/
int m[PSC_NUM_CLASSES]; /* mantissa for direct data format */
int b[PSC_NUM_CLASSES]; /* offset */
int R[PSC_NUM_CLASSES]; /* exponent */
u32 func[PMBUS_PAGES]; /* Functionality, per page */
/*
* The following functions map manufacturing specific register values
* to PMBus standard register values. Specify only if mapping is
* necessary.
* Functions return the register value (read) or zero (write) if
* successful. A return value of -ENODATA indicates that there is no
* manufacturer specific register, but that a standard PMBus register
* may exist. Any other negative return value indicates that the
* register does not exist, and that no attempt should be made to read
* the standard register.
*/
int (*read_byte_data)(struct i2c_client *client, int page, int reg);
int (*read_word_data)(struct i2c_client *client, int page, int reg);
int (*write_word_data)(struct i2c_client *client, int page, int reg,
u16 word);
int (*write_byte)(struct i2c_client *client, int page, u8 value);
/*
* The identify function determines supported PMBus functionality.
* This function is only necessary if a chip driver supports multiple
* chips, and the chip functionality is not pre-determined.
*/
int (*identify)(struct i2c_client *client,
struct pmbus_driver_info *info);
/* Regulator functionality, if supported by this chip driver. */
int num_regulators;
const struct regulator_desc *reg_desc;
};
/* Regulator ops */
extern const struct regulator_ops pmbus_regulator_ops;
/* Macro for filling in array of struct regulator_desc */
#define PMBUS_REGULATOR(_name, _id) \
[_id] = { \
.name = (_name # _id), \
.id = (_id), \
.of_match = of_match_ptr(_name # _id), \
.regulators_node = of_match_ptr("regulators"), \
.ops = &pmbus_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}
/* Function declarations */
void pmbus_clear_cache(struct i2c_client *client);
int pmbus_set_page(struct i2c_client *client, u8 page);
int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg);
int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word);
int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg);
int pmbus_write_byte(struct i2c_client *client, int page, u8 value);
int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg,
u8 value);
int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg,
u8 mask, u8 value);
void pmbus_clear_faults(struct i2c_client *client);
bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg);
bool pmbus_check_word_register(struct i2c_client *client, int page, int reg);
int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
struct pmbus_driver_info *info);
int pmbus_do_remove(struct i2c_client *client);
const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client
*client);
#endif /* PMBUS_H */