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linux-stable/drivers/hwmon/pmbus/adm1275.c
Guenter Roeck 1ae94553dc hwmon: (pmbus/adm1275) Fix problems with temperature monitoring on ADM1272 
[ Upstream commit b153a0bb41 ]

The PMON_CONFIG register on ADM1272 is a 16 bit register. Writing a 8 bit
value into it clears the upper 8 bits of the register, resulting in
unexpected side effects. Fix by writing the 16 bit register value.

Also, it has been reported that temperature readings are sometimes widely
inaccurate, to the point where readings may result in device shutdown due
to errant overtemperature faults. Improve by enabling temperature sampling.

While at it, move the common code for ADM1272 and ADM1278 into a separate
function, and clarify in the error message that an attempt was made to
enable both VOUT and temperature monitoring.

Last but not least, return the error code reported by the underlying I2C
controller and not -ENODEV if updating the PMON_CONFIG register fails.
After all, this does not indicate that the chip is not present, but an
error in the communication with the chip.

Fixes: 4ff0ce227a ("hwmon: (pmbus/adm1275) Add support for ADM1272")
Fixes: 9da9c2dc57 ("hwmon: (adm1275) enable adm1272 temperature reporting")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230602213447.3557346-1-linux@roeck-us.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-07-19 16:21:27 +02:00

844 lines
23 KiB
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
* and Digital Power Monitor
*
* Copyright (c) 2011 Ericsson AB.
* Copyright (c) 2018 Guenter Roeck
*/
#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 <linux/bitfield.h>
#include <linux/log2.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_TSFILT BIT(15)
#define ADM1278_TEMP1_EN BIT(3)
#define ADM1278_VIN_EN BIT(2)
#define ADM1278_VOUT_EN BIT(1)
#define ADM1278_PMON_DEFCONFIG (ADM1278_VOUT_EN | ADM1278_TEMP1_EN | ADM1278_TSFILT)
#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)
#define ADM1275_VI_AVG_SHIFT 0
#define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \
ADM1275_VI_AVG_SHIFT)
#define ADM1275_SAMPLES_AVG_MAX 128
#define ADM1278_PWR_AVG_SHIFT 11
#define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \
ADM1278_PWR_AVG_SHIFT)
#define ADM1278_VI_AVG_SHIFT 8
#define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \
ADM1278_VI_AVG_SHIFT)
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;
bool have_power_sampling;
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_pmon_config(const struct adm1275_data *data,
struct i2c_client *client, bool is_power)
{
int shift, ret;
u16 mask;
/*
* The PMON configuration register is a 16-bit register only on chips
* supporting power average sampling. On other chips it is an 8-bit
* register.
*/
if (data->have_power_sampling) {
ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
} else {
ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
mask = ADM1275_VI_AVG_MASK;
shift = ADM1275_VI_AVG_SHIFT;
}
if (ret < 0)
return ret;
return (ret & mask) >> shift;
}
static int adm1275_write_pmon_config(const struct adm1275_data *data,
struct i2c_client *client,
bool is_power, u16 word)
{
int shift, ret;
u16 mask;
if (data->have_power_sampling) {
ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
} else {
ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
mask = ADM1275_VI_AVG_MASK;
shift = ADM1275_VI_AVG_SHIFT;
}
if (ret < 0)
return ret;
word = (ret & ~mask) | ((word << shift) & mask);
if (data->have_power_sampling)
ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG,
word);
else
ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG,
word);
return ret;
}
static int adm1275_read_word_data(struct i2c_client *client, int page,
int phase, 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, 0xff,
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, 0xff,
ADM1275_IOUT_WARN2_LIMIT);
break;
case PMBUS_VOUT_OV_WARN_LIMIT:
if (data->have_vout)
return -ENODATA;
ret = pmbus_read_word_data(client, 0, 0xff,
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, 0xff,
ADM1075_VAUX_UV_WARN_LIMIT);
break;
case PMBUS_READ_VOUT:
if (data->have_vout)
return -ENODATA;
ret = pmbus_read_word_data(client, 0, 0xff,
ADM1075_READ_VAUX);
break;
case PMBUS_VIRT_READ_IOUT_MIN:
if (!data->have_iout_min)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, 0xff,
ADM1293_IOUT_MIN);
break;
case PMBUS_VIRT_READ_IOUT_MAX:
ret = pmbus_read_word_data(client, 0, 0xff,
ADM1275_PEAK_IOUT);
break;
case PMBUS_VIRT_READ_VOUT_MAX:
ret = pmbus_read_word_data(client, 0, 0xff,
ADM1275_PEAK_VOUT);
break;
case PMBUS_VIRT_READ_VIN_MAX:
ret = pmbus_read_word_data(client, 0, 0xff,
ADM1275_PEAK_VIN);
break;
case PMBUS_VIRT_READ_PIN_MIN:
if (!data->have_pin_min)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, 0xff,
ADM1293_PIN_MIN);
break;
case PMBUS_VIRT_READ_PIN_MAX:
if (!data->have_pin_max)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, 0xff,
ADM1276_PEAK_PIN);
break;
case PMBUS_VIRT_READ_TEMP_MAX:
if (!data->have_temp_max)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, 0xff,
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;
case PMBUS_VIRT_POWER_SAMPLES:
if (!data->have_power_sampling)
return -ENXIO;
ret = adm1275_read_pmon_config(data, client, true);
if (ret < 0)
break;
ret = BIT(ret);
break;
case PMBUS_VIRT_IN_SAMPLES:
case PMBUS_VIRT_CURR_SAMPLES:
ret = adm1275_read_pmon_config(data, client, false);
if (ret < 0)
break;
ret = BIT(ret);
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;
case PMBUS_VIRT_POWER_SAMPLES:
if (!data->have_power_sampling)
return -ENXIO;
word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
ret = adm1275_write_pmon_config(data, client, true,
ilog2(word));
break;
case PMBUS_VIRT_IN_SAMPLES:
case PMBUS_VIRT_CURR_SAMPLES:
word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
ret = adm1275_write_pmon_config(data, client, false,
ilog2(word));
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);
/* Enable VOUT & TEMP1 if not enabled (disabled by default) */
static int adm1275_enable_vout_temp(struct i2c_client *client, int config)
{
int ret;
if ((config & ADM1278_PMON_DEFCONFIG) != ADM1278_PMON_DEFCONFIG) {
config |= ADM1278_PMON_DEFCONFIG;
ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG, config);
if (ret < 0) {
dev_err(&client->dev, "Failed to enable VOUT/TEMP1 monitoring\n");
return ret;
}
}
return 0;
}
static int adm1275_probe(struct i2c_client *client)
{
s32 (*config_read_fn)(const struct i2c_client *client, u8 reg);
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;
u32 avg;
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 (strcmp(client->name, mid->name) != 0)
dev_notice(&client->dev,
"Device mismatch: Configured %s, detected %s\n",
client->name, mid->name);
if (mid->driver_data == adm1272 || mid->driver_data == adm1278 ||
mid->driver_data == adm1293 || mid->driver_data == adm1294)
config_read_fn = i2c_smbus_read_word_data;
else
config_read_fn = i2c_smbus_read_byte_data;
config = config_read_fn(client, ADM1275_PMON_CONFIG);
if (config < 0)
return config;
device_config = config_read_fn(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 |
PMBUS_HAVE_SAMPLES;
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;
data->have_power_sampling = 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 |
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
ret = adm1275_enable_vout_temp(client, config);
if (ret)
return ret;
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;
data->have_power_sampling = 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 |
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
ret = adm1275_enable_vout_temp(client, config);
if (ret)
return ret;
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;
data->have_power_sampling = 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 (data->have_power_sampling &&
of_property_read_u32(client->dev.of_node,
"adi,power-sample-average", &avg) == 0) {
if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
BIT(__fls(avg)) != avg) {
dev_err(&client->dev,
"Invalid number of power samples");
return -EINVAL;
}
ret = adm1275_write_pmon_config(data, client, true,
ilog2(avg));
if (ret < 0) {
dev_err(&client->dev,
"Setting power sample averaging failed with error %d",
ret);
return ret;
}
}
if (of_property_read_u32(client->dev.of_node,
"adi,volt-curr-sample-average", &avg) == 0) {
if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
BIT(__fls(avg)) != avg) {
dev_err(&client->dev,
"Invalid number of voltage/current samples");
return -EINVAL;
}
ret = adm1275_write_pmon_config(data, client, false,
ilog2(avg));
if (ret < 0) {
dev_err(&client->dev,
"Setting voltage and current sample averaging failed with error %d",
ret);
return ret;
}
}
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, info);
}
static struct i2c_driver adm1275_driver = {
.driver = {
.name = "adm1275",
},
.probe_new = adm1275_probe,
.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");
MODULE_IMPORT_NS(PMBUS);
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