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linux/drivers/hwmon/pmbus/adm1275.c
Kun Yi 6e5c06ad94 hwmon: (adm1275) Allow setting shunt reg value 
The ADM series of hotswap controllers support extending
the current measurement range by using a sensing resistor
value other than the typical 1 mOhm. For example, using a 0.5 mOhm
sensing resistor doubles the maximal current can be measured.

Current driver assumes a shunt resistor value of 1 mOhm in calculation,
meaning for other resistor values, hwmon will report scaled
current/power measurements. This patch parses device tree parameter
"shunt-resistor-micro-ohms", if there is one.

Signed-off-by: Kun Yi <kunyi@google.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-12-02 16:25:28 -08:00

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/*
* Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
* and Digital Power Monitor
*
* Copyright (c) 2011 Ericsson AB.
* Copyright (c) 2018 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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/bitops.h>
#include "pmbus.h"
enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 };
#define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0)
#define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
#define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6)
#define ADM1275_PEAK_IOUT 0xd0
#define ADM1275_PEAK_VIN 0xd1
#define ADM1275_PEAK_VOUT 0xd2
#define ADM1275_PMON_CONFIG 0xd4
#define ADM1275_VIN_VOUT_SELECT BIT(6)
#define ADM1275_VRANGE BIT(5)
#define ADM1075_IRANGE_50 BIT(4)
#define ADM1075_IRANGE_25 BIT(3)
#define ADM1075_IRANGE_MASK (BIT(3) | BIT(4))
#define ADM1272_IRANGE BIT(0)
#define ADM1278_TEMP1_EN BIT(3)
#define ADM1278_VIN_EN BIT(2)
#define ADM1278_VOUT_EN BIT(1)
#define ADM1293_IRANGE_25 0
#define ADM1293_IRANGE_50 BIT(6)
#define ADM1293_IRANGE_100 BIT(7)
#define ADM1293_IRANGE_200 (BIT(6) | BIT(7))
#define ADM1293_IRANGE_MASK (BIT(6) | BIT(7))
#define ADM1293_VIN_SEL_012 BIT(2)
#define ADM1293_VIN_SEL_074 BIT(3)
#define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3))
#define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3))
#define ADM1293_VAUX_EN BIT(1)
#define ADM1278_PEAK_TEMP 0xd7
#define ADM1275_IOUT_WARN2_LIMIT 0xd7
#define ADM1275_DEVICE_CONFIG 0xd8
#define ADM1275_IOUT_WARN2_SELECT BIT(4)
#define ADM1276_PEAK_PIN 0xda
#define ADM1075_READ_VAUX 0xdd
#define ADM1075_VAUX_OV_WARN_LIMIT 0xde
#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
#define ADM1293_IOUT_MIN 0xe3
#define ADM1293_PIN_MIN 0xe4
#define ADM1075_VAUX_STATUS 0xf6
#define ADM1075_VAUX_OV_WARN BIT(7)
#define ADM1075_VAUX_UV_WARN BIT(6)
struct adm1275_data {
int id;
bool have_oc_fault;
bool have_uc_fault;
bool have_vout;
bool have_vaux_status;
bool have_mfr_vaux_status;
bool have_iout_min;
bool have_pin_min;
bool have_pin_max;
bool have_temp_max;
struct pmbus_driver_info info;
};
#define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
struct coefficients {
s16 m;
s16 b;
s16 R;
};
static const struct coefficients adm1075_coefficients[] = {
[0] = { 27169, 0, -1 }, /* voltage */
[1] = { 806, 20475, -1 }, /* current, irange25 */
[2] = { 404, 20475, -1 }, /* current, irange50 */
[3] = { 8549, 0, -1 }, /* power, irange25 */
[4] = { 4279, 0, -1 }, /* power, irange50 */
};
static const struct coefficients adm1272_coefficients[] = {
[0] = { 6770, 0, -2 }, /* voltage, vrange 60V */
[1] = { 4062, 0, -2 }, /* voltage, vrange 100V */
[2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */
[3] = { 663, 20480, -1 }, /* current, vsense range 30mV */
[4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */
[5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */
[6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */
[7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */
[8] = { 42, 31871, -1 }, /* temperature */
};
static const struct coefficients adm1275_coefficients[] = {
[0] = { 19199, 0, -2 }, /* voltage, vrange set */
[1] = { 6720, 0, -1 }, /* voltage, vrange not set */
[2] = { 807, 20475, -1 }, /* current */
};
static const struct coefficients adm1276_coefficients[] = {
[0] = { 19199, 0, -2 }, /* voltage, vrange set */
[1] = { 6720, 0, -1 }, /* voltage, vrange not set */
[2] = { 807, 20475, -1 }, /* current */
[3] = { 6043, 0, -2 }, /* power, vrange set */
[4] = { 2115, 0, -1 }, /* power, vrange not set */
};
static const struct coefficients adm1278_coefficients[] = {
[0] = { 19599, 0, -2 }, /* voltage */
[1] = { 800, 20475, -1 }, /* current */
[2] = { 6123, 0, -2 }, /* power */
[3] = { 42, 31880, -1 }, /* temperature */
};
static const struct coefficients adm1293_coefficients[] = {
[0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */
[1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */
[2] = { 19604, -50, -2 }, /* voltage, vrange 21V */
[3] = { 8000, -100, -2 }, /* current, irange25 */
[4] = { 4000, -100, -2 }, /* current, irange50 */
[5] = { 20000, -1000, -3 }, /* current, irange100 */
[6] = { 10000, -1000, -3 }, /* current, irange200 */
[7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */
[8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */
[9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */
[10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */
[11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */
[12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */
[13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */
[14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */
[15] = { 6126, 0, -2 }, /* power, 21V, irange25 */
[16] = { 30631, 0, -3 }, /* power, 21V, irange50 */
[17] = { 15316, 0, -3 }, /* power, 21V, irange100 */
[18] = { 7658, 0, -3 }, /* power, 21V, irange200 */
};
static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
const struct adm1275_data *data = to_adm1275_data(info);
int ret = 0;
if (page > 0)
return -ENXIO;
switch (reg) {
case PMBUS_IOUT_UC_FAULT_LIMIT:
if (!data->have_uc_fault)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
break;
case PMBUS_IOUT_OC_FAULT_LIMIT:
if (!data->have_oc_fault)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
break;
case PMBUS_VOUT_OV_WARN_LIMIT:
if (data->have_vout)
return -ENODATA;
ret = pmbus_read_word_data(client, 0,
ADM1075_VAUX_OV_WARN_LIMIT);
break;
case PMBUS_VOUT_UV_WARN_LIMIT:
if (data->have_vout)
return -ENODATA;
ret = pmbus_read_word_data(client, 0,
ADM1075_VAUX_UV_WARN_LIMIT);
break;
case PMBUS_READ_VOUT:
if (data->have_vout)
return -ENODATA;
ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
break;
case PMBUS_VIRT_READ_IOUT_MIN:
if (!data->have_iout_min)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1293_IOUT_MIN);
break;
case PMBUS_VIRT_READ_IOUT_MAX:
ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
break;
case PMBUS_VIRT_READ_VOUT_MAX:
ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT);
break;
case PMBUS_VIRT_READ_VIN_MAX:
ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
break;
case PMBUS_VIRT_READ_PIN_MIN:
if (!data->have_pin_min)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1293_PIN_MIN);
break;
case PMBUS_VIRT_READ_PIN_MAX:
if (!data->have_pin_max)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
break;
case PMBUS_VIRT_READ_TEMP_MAX:
if (!data->have_temp_max)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1278_PEAK_TEMP);
break;
case PMBUS_VIRT_RESET_IOUT_HISTORY:
case PMBUS_VIRT_RESET_VOUT_HISTORY:
case PMBUS_VIRT_RESET_VIN_HISTORY:
break;
case PMBUS_VIRT_RESET_PIN_HISTORY:
if (!data->have_pin_max)
return -ENXIO;
break;
case PMBUS_VIRT_RESET_TEMP_HISTORY:
if (!data->have_temp_max)
return -ENXIO;
break;
default:
ret = -ENODATA;
break;
}
return ret;
}
static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
u16 word)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
const struct adm1275_data *data = to_adm1275_data(info);
int ret;
if (page > 0)
return -ENXIO;
switch (reg) {
case PMBUS_IOUT_UC_FAULT_LIMIT:
case PMBUS_IOUT_OC_FAULT_LIMIT:
ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
word);
break;
case PMBUS_VIRT_RESET_IOUT_HISTORY:
ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
if (!ret && data->have_iout_min)
ret = pmbus_write_word_data(client, 0,
ADM1293_IOUT_MIN, 0);
break;
case PMBUS_VIRT_RESET_VOUT_HISTORY:
ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
break;
case PMBUS_VIRT_RESET_VIN_HISTORY:
ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
break;
case PMBUS_VIRT_RESET_PIN_HISTORY:
ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
if (!ret && data->have_pin_min)
ret = pmbus_write_word_data(client, 0,
ADM1293_PIN_MIN, 0);
break;
case PMBUS_VIRT_RESET_TEMP_HISTORY:
ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
break;
default:
ret = -ENODATA;
break;
}
return ret;
}
static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
const struct adm1275_data *data = to_adm1275_data(info);
int mfr_status, ret;
if (page > 0)
return -ENXIO;
switch (reg) {
case PMBUS_STATUS_IOUT:
ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
if (ret < 0)
break;
if (!data->have_oc_fault && !data->have_uc_fault)
break;
mfr_status = pmbus_read_byte_data(client, page,
PMBUS_STATUS_MFR_SPECIFIC);
if (mfr_status < 0)
return mfr_status;
if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
ret |= data->have_oc_fault ?
PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
}
break;
case PMBUS_STATUS_VOUT:
if (data->have_vout)
return -ENODATA;
ret = 0;
if (data->have_vaux_status) {
mfr_status = pmbus_read_byte_data(client, 0,
ADM1075_VAUX_STATUS);
if (mfr_status < 0)
return mfr_status;
if (mfr_status & ADM1075_VAUX_OV_WARN)
ret |= PB_VOLTAGE_OV_WARNING;
if (mfr_status & ADM1075_VAUX_UV_WARN)
ret |= PB_VOLTAGE_UV_WARNING;
} else if (data->have_mfr_vaux_status) {
mfr_status = pmbus_read_byte_data(client, page,
PMBUS_STATUS_MFR_SPECIFIC);
if (mfr_status < 0)
return mfr_status;
if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
ret |= PB_VOLTAGE_OV_WARNING;
if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
ret |= PB_VOLTAGE_UV_WARNING;
}
break;
default:
ret = -ENODATA;
break;
}
return ret;
}
static const struct i2c_device_id adm1275_id[] = {
{ "adm1075", adm1075 },
{ "adm1272", adm1272 },
{ "adm1275", adm1275 },
{ "adm1276", adm1276 },
{ "adm1278", adm1278 },
{ "adm1293", adm1293 },
{ "adm1294", adm1294 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adm1275_id);
static int adm1275_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
int config, device_config;
int ret;
struct pmbus_driver_info *info;
struct adm1275_data *data;
const struct i2c_device_id *mid;
const struct coefficients *coefficients;
int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
int tindex = -1;
u32 shunt;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_BYTE_DATA
| I2C_FUNC_SMBUS_BLOCK_DATA))
return -ENODEV;
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
if (ret < 0) {
dev_err(&client->dev, "Failed to read Manufacturer ID\n");
return ret;
}
if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
dev_err(&client->dev, "Unsupported Manufacturer ID\n");
return -ENODEV;
}
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
if (ret < 0) {
dev_err(&client->dev, "Failed to read Manufacturer Model\n");
return ret;
}
for (mid = adm1275_id; mid->name[0]; mid++) {
if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
break;
}
if (!mid->name[0]) {
dev_err(&client->dev, "Unsupported device\n");
return -ENODEV;
}
if (id->driver_data != mid->driver_data)
dev_notice(&client->dev,
"Device mismatch: Configured %s, detected %s\n",
id->name, mid->name);
config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
if (config < 0)
return config;
device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG);
if (device_config < 0)
return device_config;
data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
if (of_property_read_u32(client->dev.of_node,
"shunt-resistor-micro-ohms", &shunt))
shunt = 1000; /* 1 mOhm if not set via DT */
if (shunt == 0)
return -EINVAL;
data->id = mid->driver_data;
info = &data->info;
info->pages = 1;
info->format[PSC_VOLTAGE_IN] = direct;
info->format[PSC_VOLTAGE_OUT] = direct;
info->format[PSC_CURRENT_OUT] = direct;
info->format[PSC_POWER] = direct;
info->format[PSC_TEMPERATURE] = direct;
info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
info->read_word_data = adm1275_read_word_data;
info->read_byte_data = adm1275_read_byte_data;
info->write_word_data = adm1275_write_word_data;
switch (data->id) {
case adm1075:
if (device_config & ADM1275_IOUT_WARN2_SELECT)
data->have_oc_fault = true;
else
data->have_uc_fault = true;
data->have_pin_max = true;
data->have_vaux_status = true;
coefficients = adm1075_coefficients;
vindex = 0;
switch (config & ADM1075_IRANGE_MASK) {
case ADM1075_IRANGE_25:
cindex = 1;
pindex = 3;
break;
case ADM1075_IRANGE_50:
cindex = 2;
pindex = 4;
break;
default:
dev_err(&client->dev, "Invalid input current range");
break;
}
info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
| PMBUS_HAVE_STATUS_INPUT;
if (config & ADM1275_VIN_VOUT_SELECT)
info->func[0] |=
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
break;
case adm1272:
data->have_vout = true;
data->have_pin_max = true;
data->have_temp_max = true;
coefficients = adm1272_coefficients;
vindex = (config & ADM1275_VRANGE) ? 1 : 0;
cindex = (config & ADM1272_IRANGE) ? 3 : 2;
/* pindex depends on the combination of the above */
switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) {
case 0:
default:
pindex = 4;
break;
case ADM1275_VRANGE:
pindex = 5;
break;
case ADM1272_IRANGE:
pindex = 6;
break;
case ADM1275_VRANGE | ADM1272_IRANGE:
pindex = 7;
break;
}
tindex = 8;
info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
/* Enable VOUT if not enabled (it is disabled by default) */
if (!(config & ADM1278_VOUT_EN)) {
config |= ADM1278_VOUT_EN;
ret = i2c_smbus_write_byte_data(client,
ADM1275_PMON_CONFIG,
config);
if (ret < 0) {
dev_err(&client->dev,
"Failed to enable VOUT monitoring\n");
return -ENODEV;
}
}
if (config & ADM1278_TEMP1_EN)
info->func[0] |=
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
if (config & ADM1278_VIN_EN)
info->func[0] |= PMBUS_HAVE_VIN;
break;
case adm1275:
if (device_config & ADM1275_IOUT_WARN2_SELECT)
data->have_oc_fault = true;
else
data->have_uc_fault = true;
data->have_vout = true;
coefficients = adm1275_coefficients;
vindex = (config & ADM1275_VRANGE) ? 0 : 1;
cindex = 2;
if (config & ADM1275_VIN_VOUT_SELECT)
info->func[0] |=
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
else
info->func[0] |=
PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
break;
case adm1276:
if (device_config & ADM1275_IOUT_WARN2_SELECT)
data->have_oc_fault = true;
else
data->have_uc_fault = true;
data->have_vout = true;
data->have_pin_max = true;
coefficients = adm1276_coefficients;
vindex = (config & ADM1275_VRANGE) ? 0 : 1;
cindex = 2;
pindex = (config & ADM1275_VRANGE) ? 3 : 4;
info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
| PMBUS_HAVE_STATUS_INPUT;
if (config & ADM1275_VIN_VOUT_SELECT)
info->func[0] |=
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
break;
case adm1278:
data->have_vout = true;
data->have_pin_max = true;
data->have_temp_max = true;
coefficients = adm1278_coefficients;
vindex = 0;
cindex = 1;
pindex = 2;
tindex = 3;
info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
/* Enable VOUT if not enabled (it is disabled by default) */
if (!(config & ADM1278_VOUT_EN)) {
config |= ADM1278_VOUT_EN;
ret = i2c_smbus_write_byte_data(client,
ADM1275_PMON_CONFIG,
config);
if (ret < 0) {
dev_err(&client->dev,
"Failed to enable VOUT monitoring\n");
return -ENODEV;
}
}
if (config & ADM1278_TEMP1_EN)
info->func[0] |=
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
if (config & ADM1278_VIN_EN)
info->func[0] |= PMBUS_HAVE_VIN;
break;
case adm1293:
case adm1294:
data->have_iout_min = true;
data->have_pin_min = true;
data->have_pin_max = true;
data->have_mfr_vaux_status = true;
coefficients = adm1293_coefficients;
voindex = 0;
switch (config & ADM1293_VIN_SEL_MASK) {
case ADM1293_VIN_SEL_012: /* 1.2V */
vindex = 0;
break;
case ADM1293_VIN_SEL_074: /* 7.4V */
vindex = 1;
break;
case ADM1293_VIN_SEL_210: /* 21V */
vindex = 2;
break;
default: /* disabled */
break;
}
switch (config & ADM1293_IRANGE_MASK) {
case ADM1293_IRANGE_25:
cindex = 3;
break;
case ADM1293_IRANGE_50:
cindex = 4;
break;
case ADM1293_IRANGE_100:
cindex = 5;
break;
case ADM1293_IRANGE_200:
cindex = 6;
break;
}
if (vindex >= 0)
pindex = 7 + vindex * 4 + (cindex - 3);
if (config & ADM1293_VAUX_EN)
info->func[0] |=
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
info->func[0] |= PMBUS_HAVE_PIN |
PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
break;
default:
dev_err(&client->dev, "Unsupported device\n");
return -ENODEV;
}
if (voindex < 0)
voindex = vindex;
if (vindex >= 0) {
info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
}
if (voindex >= 0) {
info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
}
if (cindex >= 0) {
/* Scale current with sense resistor value */
info->m[PSC_CURRENT_OUT] =
coefficients[cindex].m * shunt / 1000;
info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
}
if (pindex >= 0) {
info->m[PSC_POWER] =
coefficients[pindex].m * shunt / 1000;
info->b[PSC_POWER] = coefficients[pindex].b;
info->R[PSC_POWER] = coefficients[pindex].R;
}
if (tindex >= 0) {
info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
}
return pmbus_do_probe(client, id, info);
}
static struct i2c_driver adm1275_driver = {
.driver = {
.name = "adm1275",
},
.probe = adm1275_probe,
.remove = pmbus_do_remove,
.id_table = adm1275_id,
};
module_i2c_driver(adm1275_driver);
MODULE_AUTHOR("Guenter Roeck");
MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
MODULE_LICENSE("GPL");
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