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linux/drivers/hwmon/tmp401.c
Andrew Davis 516d5765a3 hwmon: (tmp401) Remove use of i2c_match_id() 
The function i2c_match_id() is used to fetch the matching ID from
the i2c_device_id table. This is often used to then retrieve the
matching driver_data. This can be done in one step with the helper
i2c_get_match_data().

This helper has a couple other benefits:
 * It doesn't need the i2c_device_id passed in so we do not need
   to have that forward declared, allowing us to remove those or
   move the i2c_device_id table down to its more natural spot
   with the other module info.
 * It also checks for device match data, which allows for OF and
   ACPI based probing. That means we do not have to manually check
   those first and can remove those checks.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240403203633.914389-28-afd@ti.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2024-06-08 16:07:33 -07:00

780 lines
20 KiB
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// SPDX-License-Identifier: GPL-2.0-or-later
/* tmp401.c
*
* Copyright (C) 2007,2008 Hans de Goede <hdegoede@redhat.com>
* Preliminary tmp411 support by:
* Gabriel Konat, Sander Leget, Wouter Willems
* Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de>
*
* Cleanup and support for TMP431 and TMP432 by Guenter Roeck
* Copyright (c) 2013 Guenter Roeck <linux@roeck-us.net>
*/
/*
* Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC.
*
* Note this IC is in some aspect similar to the LM90, but it has quite a
* few differences too, for example the local temp has a higher resolution
* and thus has 16 bits registers for its value and limit instead of 8 bits.
*/
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/regmap.h>
#include <linux/slab.h>
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4c, 0x4d,
0x4e, 0x4f, I2C_CLIENT_END };
enum chips { tmp401, tmp411, tmp431, tmp432, tmp435 };
/*
* The TMP401 registers, note some registers have different addresses for
* reading and writing
*/
#define TMP401_STATUS 0x02
#define TMP401_CONFIG 0x03
#define TMP401_CONVERSION_RATE 0x04
#define TMP4XX_N_FACTOR_REG 0x18
#define TMP43X_BETA_RANGE 0x25
#define TMP401_TEMP_CRIT_HYST 0x21
#define TMP401_MANUFACTURER_ID_REG 0xFE
#define TMP401_DEVICE_ID_REG 0xFF
static const u8 TMP401_TEMP_MSB[7][3] = {
{ 0x00, 0x01, 0x23 }, /* temp */
{ 0x06, 0x08, 0x16 }, /* low limit */
{ 0x05, 0x07, 0x15 }, /* high limit */
{ 0x20, 0x19, 0x1a }, /* therm (crit) limit */
{ 0x30, 0x34, 0x00 }, /* lowest */
{ 0x32, 0xf6, 0x00 }, /* highest */
};
/* [0] = fault, [1] = low, [2] = high, [3] = therm/crit */
static const u8 TMP432_STATUS_REG[] = {
0x1b, 0x36, 0x35, 0x37 };
/* Flags */
#define TMP401_CONFIG_RANGE BIT(2)
#define TMP401_CONFIG_SHUTDOWN BIT(6)
#define TMP401_STATUS_LOCAL_CRIT BIT(0)
#define TMP401_STATUS_REMOTE_CRIT BIT(1)
#define TMP401_STATUS_REMOTE_OPEN BIT(2)
#define TMP401_STATUS_REMOTE_LOW BIT(3)
#define TMP401_STATUS_REMOTE_HIGH BIT(4)
#define TMP401_STATUS_LOCAL_LOW BIT(5)
#define TMP401_STATUS_LOCAL_HIGH BIT(6)
/* On TMP432, each status has its own register */
#define TMP432_STATUS_LOCAL BIT(0)
#define TMP432_STATUS_REMOTE1 BIT(1)
#define TMP432_STATUS_REMOTE2 BIT(2)
/* Manufacturer / Device ID's */
#define TMP401_MANUFACTURER_ID 0x55
#define TMP401_DEVICE_ID 0x11
#define TMP411A_DEVICE_ID 0x12
#define TMP411B_DEVICE_ID 0x13
#define TMP411C_DEVICE_ID 0x10
#define TMP431_DEVICE_ID 0x31
#define TMP432_DEVICE_ID 0x32
#define TMP435_DEVICE_ID 0x35
/*
* Driver data (common to all clients)
*/
static const struct i2c_device_id tmp401_id[] = {
{ "tmp401", tmp401 },
{ "tmp411", tmp411 },
{ "tmp431", tmp431 },
{ "tmp432", tmp432 },
{ "tmp435", tmp435 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tmp401_id);
/*
* Client data (each client gets its own)
*/
struct tmp401_data {
struct i2c_client *client;
struct regmap *regmap;
struct mutex update_lock;
enum chips kind;
bool extended_range;
/* hwmon API configuration data */
u32 chip_channel_config[4];
struct hwmon_channel_info chip_info;
u32 temp_channel_config[4];
struct hwmon_channel_info temp_info;
const struct hwmon_channel_info *info[3];
struct hwmon_chip_info chip;
};
/* regmap */
static bool tmp401_regmap_is_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case 0: /* local temp msb */
case 1: /* remote temp msb */
case 2: /* status */
case 0x10: /* remote temp lsb */
case 0x15: /* local temp lsb */
case 0x1b: /* status (tmp432) */
case 0x23 ... 0x24: /* remote temp 2 msb / lsb */
case 0x30 ... 0x37: /* lowest/highest temp; status (tmp432) */
return true;
default:
return false;
}
}
static int tmp401_reg_read(void *context, unsigned int reg, unsigned int *val)
{
struct tmp401_data *data = context;
struct i2c_client *client = data->client;
int regval;
switch (reg) {
case 0: /* local temp msb */
case 1: /* remote temp msb */
case 5: /* local temp high limit msb */
case 6: /* local temp low limit msb */
case 7: /* remote temp ligh limit msb */
case 8: /* remote temp low limit msb */
case 0x15: /* remote temp 2 high limit msb */
case 0x16: /* remote temp 2 low limit msb */
case 0x23: /* remote temp 2 msb */
case 0x30: /* local temp minimum, tmp411 */
case 0x32: /* local temp maximum, tmp411 */
case 0x34: /* remote temp minimum, tmp411 */
case 0xf6: /* remote temp maximum, tmp411 (really 0x36) */
/* work around register overlap between TMP411 and TMP432 */
if (reg == 0xf6)
reg = 0x36;
regval = i2c_smbus_read_word_swapped(client, reg);
if (regval < 0)
return regval;
*val = regval;
break;
case 0x19: /* critical limits, 8-bit registers */
case 0x1a:
case 0x20:
regval = i2c_smbus_read_byte_data(client, reg);
if (regval < 0)
return regval;
*val = regval << 8;
break;
case 0x1b:
case 0x35 ... 0x37:
if (data->kind == tmp432) {
regval = i2c_smbus_read_byte_data(client, reg);
if (regval < 0)
return regval;
*val = regval;
break;
}
/* simulate TMP432 status registers */
regval = i2c_smbus_read_byte_data(client, TMP401_STATUS);
if (regval < 0)
return regval;
*val = 0;
switch (reg) {
case 0x1b: /* open / fault */
if (regval & TMP401_STATUS_REMOTE_OPEN)
*val |= BIT(1);
break;
case 0x35: /* high limit */
if (regval & TMP401_STATUS_LOCAL_HIGH)
*val |= BIT(0);
if (regval & TMP401_STATUS_REMOTE_HIGH)
*val |= BIT(1);
break;
case 0x36: /* low limit */
if (regval & TMP401_STATUS_LOCAL_LOW)
*val |= BIT(0);
if (regval & TMP401_STATUS_REMOTE_LOW)
*val |= BIT(1);
break;
case 0x37: /* therm / crit limit */
if (regval & TMP401_STATUS_LOCAL_CRIT)
*val |= BIT(0);
if (regval & TMP401_STATUS_REMOTE_CRIT)
*val |= BIT(1);
break;
}
break;
default:
regval = i2c_smbus_read_byte_data(client, reg);
if (regval < 0)
return regval;
*val = regval;
break;
}
return 0;
}
static int tmp401_reg_write(void *context, unsigned int reg, unsigned int val)
{
struct tmp401_data *data = context;
struct i2c_client *client = data->client;
switch (reg) {
case 0x05: /* local temp high limit msb */
case 0x06: /* local temp low limit msb */
case 0x07: /* remote temp ligh limit msb */
case 0x08: /* remote temp low limit msb */
reg += 6; /* adjust for register write address */
fallthrough;
case 0x15: /* remote temp 2 high limit msb */
case 0x16: /* remote temp 2 low limit msb */
return i2c_smbus_write_word_swapped(client, reg, val);
case 0x19: /* critical limits, 8-bit registers */
case 0x1a:
case 0x20:
return i2c_smbus_write_byte_data(client, reg, val >> 8);
case TMP401_CONVERSION_RATE:
case TMP401_CONFIG:
reg += 6; /* adjust for register write address */
fallthrough;
default:
return i2c_smbus_write_byte_data(client, reg, val);
}
}
static const struct regmap_config tmp401_regmap_config = {
.reg_bits = 8,
.val_bits = 16,
.cache_type = REGCACHE_MAPLE,
.volatile_reg = tmp401_regmap_is_volatile,
.reg_read = tmp401_reg_read,
.reg_write = tmp401_reg_write,
};
/* temperature conversion */
static int tmp401_register_to_temp(u16 reg, bool extended)
{
int temp = reg;
if (extended)
temp -= 64 * 256;
return DIV_ROUND_CLOSEST(temp * 125, 32);
}
static u16 tmp401_temp_to_register(long temp, bool extended, int zbits)
{
if (extended) {
temp = clamp_val(temp, -64000, 191000);
temp += 64000;
} else {
temp = clamp_val(temp, 0, 127000);
}
return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
}
/* hwmon API functions */
static const u8 tmp401_temp_reg_index[] = {
[hwmon_temp_input] = 0,
[hwmon_temp_min] = 1,
[hwmon_temp_max] = 2,
[hwmon_temp_crit] = 3,
[hwmon_temp_lowest] = 4,
[hwmon_temp_highest] = 5,
};
static const u8 tmp401_status_reg_index[] = {
[hwmon_temp_fault] = 0,
[hwmon_temp_min_alarm] = 1,
[hwmon_temp_max_alarm] = 2,
[hwmon_temp_crit_alarm] = 3,
};
static int tmp401_temp_read(struct device *dev, u32 attr, int channel, long *val)
{
struct tmp401_data *data = dev_get_drvdata(dev);
struct regmap *regmap = data->regmap;
unsigned int regval;
int reg, ret;
switch (attr) {
case hwmon_temp_input:
case hwmon_temp_min:
case hwmon_temp_max:
case hwmon_temp_crit:
case hwmon_temp_lowest:
case hwmon_temp_highest:
reg = TMP401_TEMP_MSB[tmp401_temp_reg_index[attr]][channel];
ret = regmap_read(regmap, reg, &regval);
if (ret < 0)
return ret;
*val = tmp401_register_to_temp(regval, data->extended_range);
break;
case hwmon_temp_crit_hyst:
mutex_lock(&data->update_lock);
reg = TMP401_TEMP_MSB[3][channel];
ret = regmap_read(regmap, reg, &regval);
if (ret < 0)
goto unlock;
*val = tmp401_register_to_temp(regval, data->extended_range);
ret = regmap_read(regmap, TMP401_TEMP_CRIT_HYST, &regval);
if (ret < 0)
goto unlock;
*val -= regval * 1000;
unlock:
mutex_unlock(&data->update_lock);
if (ret < 0)
return ret;
break;
case hwmon_temp_fault:
case hwmon_temp_min_alarm:
case hwmon_temp_max_alarm:
case hwmon_temp_crit_alarm:
reg = TMP432_STATUS_REG[tmp401_status_reg_index[attr]];
ret = regmap_read(regmap, reg, &regval);
if (ret < 0)
return ret;
*val = !!(regval & BIT(channel));
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static int tmp401_temp_write(struct device *dev, u32 attr, int channel,
long val)
{
struct tmp401_data *data = dev_get_drvdata(dev);
struct regmap *regmap = data->regmap;
unsigned int regval;
int reg, ret, temp;
mutex_lock(&data->update_lock);
switch (attr) {
case hwmon_temp_min:
case hwmon_temp_max:
case hwmon_temp_crit:
reg = TMP401_TEMP_MSB[tmp401_temp_reg_index[attr]][channel];
regval = tmp401_temp_to_register(val, data->extended_range,
attr == hwmon_temp_crit ? 8 : 4);
ret = regmap_write(regmap, reg, regval);
break;
case hwmon_temp_crit_hyst:
if (data->extended_range)
val = clamp_val(val, -64000, 191000);
else
val = clamp_val(val, 0, 127000);
reg = TMP401_TEMP_MSB[3][channel];
ret = regmap_read(regmap, reg, &regval);
if (ret < 0)
break;
temp = tmp401_register_to_temp(regval, data->extended_range);
val = clamp_val(val, temp - 255000, temp);
regval = ((temp - val) + 500) / 1000;
ret = regmap_write(regmap, TMP401_TEMP_CRIT_HYST, regval);
break;
default:
ret = -EOPNOTSUPP;
break;
}
mutex_unlock(&data->update_lock);
return ret;
}
static int tmp401_chip_read(struct device *dev, u32 attr, int channel, long *val)
{
struct tmp401_data *data = dev_get_drvdata(dev);
u32 regval;
int ret;
switch (attr) {
case hwmon_chip_update_interval:
ret = regmap_read(data->regmap, TMP401_CONVERSION_RATE, &regval);
if (ret < 0)
return ret;
*val = (1 << (7 - regval)) * 125;
break;
case hwmon_chip_temp_reset_history:
*val = 0;
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static int tmp401_set_convrate(struct regmap *regmap, long val)
{
int rate;
/*
* For valid rates, interval can be calculated as
* interval = (1 << (7 - rate)) * 125;
* Rounded rate is therefore
* rate = 7 - __fls(interval * 4 / (125 * 3));
* Use clamp_val() to avoid overflows, and to ensure valid input
* for __fls.
*/
val = clamp_val(val, 125, 16000);
rate = 7 - __fls(val * 4 / (125 * 3));
return regmap_write(regmap, TMP401_CONVERSION_RATE, rate);
}
static int tmp401_chip_write(struct device *dev, u32 attr, int channel, long val)
{
struct tmp401_data *data = dev_get_drvdata(dev);
struct regmap *regmap = data->regmap;
int err;
mutex_lock(&data->update_lock);
switch (attr) {
case hwmon_chip_update_interval:
err = tmp401_set_convrate(regmap, val);
break;
case hwmon_chip_temp_reset_history:
if (val != 1) {
err = -EINVAL;
break;
}
/*
* Reset history by writing any value to any of the
* minimum/maximum registers (0x30-0x37).
*/
err = regmap_write(regmap, 0x30, 0);
break;
default:
err = -EOPNOTSUPP;
break;
}
mutex_unlock(&data->update_lock);
return err;
}
static int tmp401_read(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val)
{
switch (type) {
case hwmon_chip:
return tmp401_chip_read(dev, attr, channel, val);
case hwmon_temp:
return tmp401_temp_read(dev, attr, channel, val);
default:
return -EOPNOTSUPP;
}
}
static int tmp401_write(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long val)
{
switch (type) {
case hwmon_chip:
return tmp401_chip_write(dev, attr, channel, val);
case hwmon_temp:
return tmp401_temp_write(dev, attr, channel, val);
default:
return -EOPNOTSUPP;
}
}
static umode_t tmp401_is_visible(const void *data, enum hwmon_sensor_types type,
u32 attr, int channel)
{
switch (type) {
case hwmon_chip:
switch (attr) {
case hwmon_chip_update_interval:
case hwmon_chip_temp_reset_history:
return 0644;
default:
break;
}
break;
case hwmon_temp:
switch (attr) {
case hwmon_temp_input:
case hwmon_temp_min_alarm:
case hwmon_temp_max_alarm:
case hwmon_temp_crit_alarm:
case hwmon_temp_fault:
case hwmon_temp_lowest:
case hwmon_temp_highest:
return 0444;
case hwmon_temp_min:
case hwmon_temp_max:
case hwmon_temp_crit:
case hwmon_temp_crit_hyst:
return 0644;
default:
break;
}
break;
default:
break;
}
return 0;
}
static const struct hwmon_ops tmp401_ops = {
.is_visible = tmp401_is_visible,
.read = tmp401_read,
.write = tmp401_write,
};
/* chip initialization, detect, probe */
static int tmp401_init_client(struct tmp401_data *data)
{
struct regmap *regmap = data->regmap;
u32 config, config_orig;
int ret;
u32 val = 0;
s32 nfactor = 0;
/* Set conversion rate to 2 Hz */
ret = regmap_write(regmap, TMP401_CONVERSION_RATE, 5);
if (ret < 0)
return ret;
/* Start conversions (disable shutdown if necessary) */
ret = regmap_read(regmap, TMP401_CONFIG, &config);
if (ret < 0)
return ret;
config_orig = config;
config &= ~TMP401_CONFIG_SHUTDOWN;
if (of_property_read_bool(data->client->dev.of_node, "ti,extended-range-enable")) {
/* Enable measurement over extended temperature range */
config |= TMP401_CONFIG_RANGE;
}
data->extended_range = !!(config & TMP401_CONFIG_RANGE);
if (config != config_orig) {
ret = regmap_write(regmap, TMP401_CONFIG, config);
if (ret < 0)
return ret;
}
ret = of_property_read_u32(data->client->dev.of_node, "ti,n-factor", &nfactor);
if (!ret) {
if (data->kind == tmp401) {
dev_err(&data->client->dev, "ti,tmp401 does not support n-factor correction\n");
return -EINVAL;
}
if (nfactor < -128 || nfactor > 127) {
dev_err(&data->client->dev, "n-factor is invalid (%d)\n", nfactor);
return -EINVAL;
}
ret = regmap_write(regmap, TMP4XX_N_FACTOR_REG, (unsigned int)nfactor);
if (ret < 0)
return ret;
}
ret = of_property_read_u32(data->client->dev.of_node, "ti,beta-compensation", &val);
if (!ret) {
if (data->kind == tmp401 || data->kind == tmp411) {
dev_err(&data->client->dev, "ti,tmp401 or ti,tmp411 does not support beta compensation\n");
return -EINVAL;
}
if (val > 15) {
dev_err(&data->client->dev, "beta-compensation is invalid (%u)\n", val);
return -EINVAL;
}
ret = regmap_write(regmap, TMP43X_BETA_RANGE, val);
if (ret < 0)
return ret;
}
return 0;
}
static int tmp401_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
enum chips kind;
struct i2c_adapter *adapter = client->adapter;
u8 reg;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
/* Detect and identify the chip */
reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG);
if (reg != TMP401_MANUFACTURER_ID)
return -ENODEV;
reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);
switch (reg) {
case TMP401_DEVICE_ID:
if (client->addr != 0x4c)
return -ENODEV;
kind = tmp401;
break;
case TMP411A_DEVICE_ID:
if (client->addr != 0x4c)
return -ENODEV;
kind = tmp411;
break;
case TMP411B_DEVICE_ID:
if (client->addr != 0x4d)
return -ENODEV;
kind = tmp411;
break;
case TMP411C_DEVICE_ID:
if (client->addr != 0x4e)
return -ENODEV;
kind = tmp411;
break;
case TMP431_DEVICE_ID:
if (client->addr != 0x4c && client->addr != 0x4d)
return -ENODEV;
kind = tmp431;
break;
case TMP432_DEVICE_ID:
if (client->addr != 0x4c && client->addr != 0x4d)
return -ENODEV;
kind = tmp432;
break;
case TMP435_DEVICE_ID:
kind = tmp435;
break;
default:
return -ENODEV;
}
reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG);
if (reg & 0x1b)
return -ENODEV;
reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE);
/* Datasheet says: 0x1-0x6 */
if (reg > 15)
return -ENODEV;
strscpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE);
return 0;
}
static int tmp401_probe(struct i2c_client *client)
{
static const char * const names[] = {
"TMP401", "TMP411", "TMP431", "TMP432", "TMP435"
};
struct device *dev = &client->dev;
struct hwmon_channel_info *info;
struct device *hwmon_dev;
struct tmp401_data *data;
int status;
data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->client = client;
mutex_init(&data->update_lock);
data->kind = (uintptr_t)i2c_get_match_data(client);
data->regmap = devm_regmap_init(dev, NULL, data, &tmp401_regmap_config);
if (IS_ERR(data->regmap))
return PTR_ERR(data->regmap);
/* initialize configuration data */
data->chip.ops = &tmp401_ops;
data->chip.info = data->info;
data->info[0] = &data->chip_info;
data->info[1] = &data->temp_info;
info = &data->chip_info;
info->type = hwmon_chip;
info->config = data->chip_channel_config;
data->chip_channel_config[0] = HWMON_C_UPDATE_INTERVAL;
info = &data->temp_info;
info->type = hwmon_temp;
info->config = data->temp_channel_config;
data->temp_channel_config[0] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM;
data->temp_channel_config[1] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT;
if (data->kind == tmp411) {
data->temp_channel_config[0] |= HWMON_T_HIGHEST | HWMON_T_LOWEST;
data->temp_channel_config[1] |= HWMON_T_HIGHEST | HWMON_T_LOWEST;
data->chip_channel_config[0] |= HWMON_C_TEMP_RESET_HISTORY;
}
if (data->kind == tmp432) {
data->temp_channel_config[2] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT;
}
/* Initialize the TMP401 chip */
status = tmp401_init_client(data);
if (status < 0)
return status;
hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data,
&data->chip, NULL);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
dev_info(dev, "Detected TI %s chip\n", names[data->kind]);
return 0;
}
static const struct of_device_id __maybe_unused tmp4xx_of_match[] = {
{ .compatible = "ti,tmp401", },
{ .compatible = "ti,tmp411", },
{ .compatible = "ti,tmp431", },
{ .compatible = "ti,tmp432", },
{ .compatible = "ti,tmp435", },
{ },
};
MODULE_DEVICE_TABLE(of, tmp4xx_of_match);
static struct i2c_driver tmp401_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "tmp401",
.of_match_table = of_match_ptr(tmp4xx_of_match),
},
.probe = tmp401_probe,
.id_table = tmp401_id,
.detect = tmp401_detect,
.address_list = normal_i2c,
};
module_i2c_driver(tmp401_driver);
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver");
MODULE_LICENSE("GPL");
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