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linux-stable/drivers/hwmon/tmp401.c
Stephen Kitt 6748703856 hwmon: use simple i2c probe function 
Many hwmon drivers don't use the id information provided by the old
i2c probe function, and the remainder can easily be adapted to the new
form ("probe_new") by calling i2c_match_id explicitly.

This avoids scanning the identifier tables during probes.

Drivers which didn't use the id are converted as-is; drivers which did
are modified as follows:

* if the information in i2c_client is sufficient, that's used instead
  (client->name);
* anything else is handled by calling i2c_match_id() with the same
  level of error-handling (if any) as before.

A few drivers aren't included in this patch because they have a
different set of maintainers. They will be covered by other patches.

Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200813160222.1503401-1-steve@sk2.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2020-09-23 09:42:39 -07:00

748 lines
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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/module.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.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, tmp461 };
/*
* The TMP401 registers, note some registers have different addresses for
* reading and writing
*/
#define TMP401_STATUS 0x02
#define TMP401_CONFIG_READ 0x03
#define TMP401_CONFIG_WRITE 0x09
#define TMP401_CONVERSION_RATE_READ 0x04
#define TMP401_CONVERSION_RATE_WRITE 0x0A
#define TMP401_TEMP_CRIT_HYST 0x21
#define TMP401_MANUFACTURER_ID_REG 0xFE
#define TMP401_DEVICE_ID_REG 0xFF
static const u8 TMP401_TEMP_MSB_READ[7][2] = {
{ 0x00, 0x01 }, /* temp */
{ 0x06, 0x08 }, /* low limit */
{ 0x05, 0x07 }, /* high limit */
{ 0x20, 0x19 }, /* therm (crit) limit */
{ 0x30, 0x34 }, /* lowest */
{ 0x32, 0x36 }, /* highest */
{ 0, 0x11 }, /* offset */
};
static const u8 TMP401_TEMP_MSB_WRITE[7][2] = {
{ 0, 0 }, /* temp (unused) */
{ 0x0C, 0x0E }, /* low limit */
{ 0x0B, 0x0D }, /* high limit */
{ 0x20, 0x19 }, /* therm (crit) limit */
{ 0x30, 0x34 }, /* lowest */
{ 0x32, 0x36 }, /* highest */
{ 0, 0x11 }, /* offset */
};
static const u8 TMP432_TEMP_MSB_READ[4][3] = {
{ 0x00, 0x01, 0x23 }, /* temp */
{ 0x06, 0x08, 0x16 }, /* low limit */
{ 0x05, 0x07, 0x15 }, /* high limit */
{ 0x20, 0x19, 0x1A }, /* therm (crit) limit */
};
static const u8 TMP432_TEMP_MSB_WRITE[4][3] = {
{ 0, 0, 0 }, /* temp - unused */
{ 0x0C, 0x0E, 0x16 }, /* low limit */
{ 0x0B, 0x0D, 0x15 }, /* high limit */
{ 0x20, 0x19, 0x1A }, /* therm (crit) limit */
};
/* [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 },
{ "tmp461", tmp461 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tmp401_id);
/*
* Client data (each client gets its own)
*/
struct tmp401_data {
struct i2c_client *client;
const struct attribute_group *groups[3];
struct mutex update_lock;
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* in jiffies */
enum chips kind;
unsigned int update_interval; /* in milliseconds */
/* register values */
u8 status[4];
u8 config;
u16 temp[7][3];
u8 temp_crit_hyst;
};
/*
* Sysfs attr show / store functions
*/
static int tmp401_register_to_temp(u16 reg, u8 config)
{
int temp = reg;
if (config & TMP401_CONFIG_RANGE)
temp -= 64 * 256;
return DIV_ROUND_CLOSEST(temp * 125, 32);
}
static u16 tmp401_temp_to_register(long temp, u8 config, int zbits)
{
if (config & TMP401_CONFIG_RANGE) {
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;
}
static int tmp401_update_device_reg16(struct i2c_client *client,
struct tmp401_data *data)
{
int i, j, val;
int num_regs = data->kind == tmp411 ? 6 : 4;
int num_sensors = data->kind == tmp432 ? 3 : 2;
for (i = 0; i < num_sensors; i++) { /* local / r1 / r2 */
for (j = 0; j < num_regs; j++) { /* temp / low / ... */
u8 regaddr;
regaddr = data->kind == tmp432 ?
TMP432_TEMP_MSB_READ[j][i] :
TMP401_TEMP_MSB_READ[j][i];
if (j == 3) { /* crit is msb only */
val = i2c_smbus_read_byte_data(client, regaddr);
} else {
val = i2c_smbus_read_word_swapped(client,
regaddr);
}
if (val < 0)
return val;
data->temp[j][i] = j == 3 ? val << 8 : val;
}
}
return 0;
}
static struct tmp401_data *tmp401_update_device(struct device *dev)
{
struct tmp401_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
struct tmp401_data *ret = data;
int i, val;
unsigned long next_update;
mutex_lock(&data->update_lock);
next_update = data->last_updated +
msecs_to_jiffies(data->update_interval);
if (time_after(jiffies, next_update) || !data->valid) {
if (data->kind != tmp432) {
/*
* The driver uses the TMP432 status format internally.
* Convert status to TMP432 format for other chips.
*/
val = i2c_smbus_read_byte_data(client, TMP401_STATUS);
if (val < 0) {
ret = ERR_PTR(val);
goto abort;
}
data->status[0] =
(val & TMP401_STATUS_REMOTE_OPEN) >> 1;
data->status[1] =
((val & TMP401_STATUS_REMOTE_LOW) >> 2) |
((val & TMP401_STATUS_LOCAL_LOW) >> 5);
data->status[2] =
((val & TMP401_STATUS_REMOTE_HIGH) >> 3) |
((val & TMP401_STATUS_LOCAL_HIGH) >> 6);
data->status[3] = val & (TMP401_STATUS_LOCAL_CRIT
| TMP401_STATUS_REMOTE_CRIT);
} else {
for (i = 0; i < ARRAY_SIZE(data->status); i++) {
val = i2c_smbus_read_byte_data(client,
TMP432_STATUS_REG[i]);
if (val < 0) {
ret = ERR_PTR(val);
goto abort;
}
data->status[i] = val;
}
}
val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
if (val < 0) {
ret = ERR_PTR(val);
goto abort;
}
data->config = val;
val = tmp401_update_device_reg16(client, data);
if (val < 0) {
ret = ERR_PTR(val);
goto abort;
}
val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST);
if (val < 0) {
ret = ERR_PTR(val);
goto abort;
}
data->temp_crit_hyst = val;
data->last_updated = jiffies;
data->valid = 1;
}
abort:
mutex_unlock(&data->update_lock);
return ret;
}
static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
char *buf)
{
int nr = to_sensor_dev_attr_2(devattr)->nr;
int index = to_sensor_dev_attr_2(devattr)->index;
struct tmp401_data *data = tmp401_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
return sprintf(buf, "%d\n",
tmp401_register_to_temp(data->temp[nr][index], data->config));
}
static ssize_t temp_crit_hyst_show(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
int temp, index = to_sensor_dev_attr(devattr)->index;
struct tmp401_data *data = tmp401_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
mutex_lock(&data->update_lock);
temp = tmp401_register_to_temp(data->temp[3][index], data->config);
temp -= data->temp_crit_hyst * 1000;
mutex_unlock(&data->update_lock);
return sprintf(buf, "%d\n", temp);
}
static ssize_t status_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
int nr = to_sensor_dev_attr_2(devattr)->nr;
int mask = to_sensor_dev_attr_2(devattr)->index;
struct tmp401_data *data = tmp401_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
return sprintf(buf, "%d\n", !!(data->status[nr] & mask));
}
static ssize_t temp_store(struct device *dev,
struct device_attribute *devattr, const char *buf,
size_t count)
{
int nr = to_sensor_dev_attr_2(devattr)->nr;
int index = to_sensor_dev_attr_2(devattr)->index;
struct tmp401_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long val;
u16 reg;
u8 regaddr;
if (kstrtol(buf, 10, &val))
return -EINVAL;
reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4);
mutex_lock(&data->update_lock);
regaddr = data->kind == tmp432 ? TMP432_TEMP_MSB_WRITE[nr][index]
: TMP401_TEMP_MSB_WRITE[nr][index];
if (nr == 3) { /* crit is msb only */
i2c_smbus_write_byte_data(client, regaddr, reg >> 8);
} else {
/* Hardware expects big endian data --> use _swapped */
i2c_smbus_write_word_swapped(client, regaddr, reg);
}
data->temp[nr][index] = reg;
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t temp_crit_hyst_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
int temp, index = to_sensor_dev_attr(devattr)->index;
struct tmp401_data *data = tmp401_update_device(dev);
long val;
u8 reg;
if (IS_ERR(data))
return PTR_ERR(data);
if (kstrtol(buf, 10, &val))
return -EINVAL;
if (data->config & TMP401_CONFIG_RANGE)
val = clamp_val(val, -64000, 191000);
else
val = clamp_val(val, 0, 127000);
mutex_lock(&data->update_lock);
temp = tmp401_register_to_temp(data->temp[3][index], data->config);
val = clamp_val(val, temp - 255000, temp);
reg = ((temp - val) + 500) / 1000;
i2c_smbus_write_byte_data(data->client, TMP401_TEMP_CRIT_HYST,
reg);
data->temp_crit_hyst = reg;
mutex_unlock(&data->update_lock);
return count;
}
/*
* Resets the historical measurements of minimum and maximum temperatures.
* This is done by writing any value to any of the minimum/maximum registers
* (0x30-0x37).
*/
static ssize_t reset_temp_history_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct tmp401_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long val;
if (kstrtol(buf, 10, &val))
return -EINVAL;
if (val != 1) {
dev_err(dev,
"temp_reset_history value %ld not supported. Use 1 to reset the history!\n",
val);
return -EINVAL;
}
mutex_lock(&data->update_lock);
i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
data->valid = 0;
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t update_interval_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tmp401_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", data->update_interval);
}
static ssize_t update_interval_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct tmp401_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long val;
int err, rate;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
/*
* 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));
mutex_lock(&data->update_lock);
i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, rate);
data->update_interval = (1 << (7 - rate)) * 125;
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR_2_RO(temp1_input, temp, 0, 0);
static SENSOR_DEVICE_ATTR_2_RW(temp1_min, temp, 1, 0);
static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 2, 0);
static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 3, 0);
static SENSOR_DEVICE_ATTR_RW(temp1_crit_hyst, temp_crit_hyst, 0);
static SENSOR_DEVICE_ATTR_2_RO(temp1_min_alarm, status, 1,
TMP432_STATUS_LOCAL);
static SENSOR_DEVICE_ATTR_2_RO(temp1_max_alarm, status, 2,
TMP432_STATUS_LOCAL);
static SENSOR_DEVICE_ATTR_2_RO(temp1_crit_alarm, status, 3,
TMP432_STATUS_LOCAL);
static SENSOR_DEVICE_ATTR_2_RO(temp2_input, temp, 0, 1);
static SENSOR_DEVICE_ATTR_2_RW(temp2_min, temp, 1, 1);
static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 2, 1);
static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 3, 1);
static SENSOR_DEVICE_ATTR_RO(temp2_crit_hyst, temp_crit_hyst, 1);
static SENSOR_DEVICE_ATTR_2_RO(temp2_fault, status, 0, TMP432_STATUS_REMOTE1);
static SENSOR_DEVICE_ATTR_2_RO(temp2_min_alarm, status, 1,
TMP432_STATUS_REMOTE1);
static SENSOR_DEVICE_ATTR_2_RO(temp2_max_alarm, status, 2,
TMP432_STATUS_REMOTE1);
static SENSOR_DEVICE_ATTR_2_RO(temp2_crit_alarm, status, 3,
TMP432_STATUS_REMOTE1);
static DEVICE_ATTR_RW(update_interval);
static struct attribute *tmp401_attributes[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_crit.dev_attr.attr,
&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp2_crit.dev_attr.attr,
&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
&sensor_dev_attr_temp2_fault.dev_attr.attr,
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
&dev_attr_update_interval.attr,
NULL
};
static const struct attribute_group tmp401_group = {
.attrs = tmp401_attributes,
};
/*
* Additional features of the TMP411 chip.
* The TMP411 stores the minimum and maximum
* temperature measured since power-on, chip-reset, or
* minimum and maximum register reset for both the local
* and remote channels.
*/
static SENSOR_DEVICE_ATTR_2_RO(temp1_lowest, temp, 4, 0);
static SENSOR_DEVICE_ATTR_2_RO(temp1_highest, temp, 5, 0);
static SENSOR_DEVICE_ATTR_2_RO(temp2_lowest, temp, 4, 1);
static SENSOR_DEVICE_ATTR_2_RO(temp2_highest, temp, 5, 1);
static SENSOR_DEVICE_ATTR_WO(temp_reset_history, reset_temp_history, 0);
static struct attribute *tmp411_attributes[] = {
&sensor_dev_attr_temp1_highest.dev_attr.attr,
&sensor_dev_attr_temp1_lowest.dev_attr.attr,
&sensor_dev_attr_temp2_highest.dev_attr.attr,
&sensor_dev_attr_temp2_lowest.dev_attr.attr,
&sensor_dev_attr_temp_reset_history.dev_attr.attr,
NULL
};
static const struct attribute_group tmp411_group = {
.attrs = tmp411_attributes,
};
static SENSOR_DEVICE_ATTR_2_RO(temp3_input, temp, 0, 2);
static SENSOR_DEVICE_ATTR_2_RW(temp3_min, temp, 1, 2);
static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 2, 2);
static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 3, 2);
static SENSOR_DEVICE_ATTR_RO(temp3_crit_hyst, temp_crit_hyst, 2);
static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, status, 0, TMP432_STATUS_REMOTE2);
static SENSOR_DEVICE_ATTR_2_RO(temp3_min_alarm, status, 1,
TMP432_STATUS_REMOTE2);
static SENSOR_DEVICE_ATTR_2_RO(temp3_max_alarm, status, 2,
TMP432_STATUS_REMOTE2);
static SENSOR_DEVICE_ATTR_2_RO(temp3_crit_alarm, status, 3,
TMP432_STATUS_REMOTE2);
static struct attribute *tmp432_attributes[] = {
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp3_min.dev_attr.attr,
&sensor_dev_attr_temp3_max.dev_attr.attr,
&sensor_dev_attr_temp3_crit.dev_attr.attr,
&sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
&sensor_dev_attr_temp3_fault.dev_attr.attr,
&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
NULL
};
static const struct attribute_group tmp432_group = {
.attrs = tmp432_attributes,
};
/*
* Additional features of the TMP461 chip.
* The TMP461 temperature offset for the remote channel.
*/
static SENSOR_DEVICE_ATTR_2_RW(temp2_offset, temp, 6, 1);
static struct attribute *tmp461_attributes[] = {
&sensor_dev_attr_temp2_offset.dev_attr.attr,
NULL
};
static const struct attribute_group tmp461_group = {
.attrs = tmp461_attributes,
};
/*
* Begin non sysfs callback code (aka Real code)
*/
static int tmp401_init_client(struct tmp401_data *data,
struct i2c_client *client)
{
int config, config_orig, status = 0;
/* Set the conversion rate to 2 Hz */
i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5);
data->update_interval = 500;
/* Start conversions (disable shutdown if necessary) */
config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
if (config < 0)
return config;
config_orig = config;
config &= ~TMP401_CONFIG_SHUTDOWN;
if (config != config_orig)
status = i2c_smbus_write_byte_data(client,
TMP401_CONFIG_WRITE,
config);
return status;
}
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_READ);
if (reg & 0x1b)
return -ENODEV;
reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ);
/* Datasheet says: 0x1-0x6 */
if (reg > 15)
return -ENODEV;
strlcpy(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", "TMP461"
};
struct device *dev = &client->dev;
struct device *hwmon_dev;
struct tmp401_data *data;
int groups = 0, 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 = i2c_match_id(tmp401_id, client)->driver_data;
/* Initialize the TMP401 chip */
status = tmp401_init_client(data, client);
if (status < 0)
return status;
/* Register sysfs hooks */
data->groups[groups++] = &tmp401_group;
/* Register additional tmp411 sysfs hooks */
if (data->kind == tmp411)
data->groups[groups++] = &tmp411_group;
/* Register additional tmp432 sysfs hooks */
if (data->kind == tmp432)
data->groups[groups++] = &tmp432_group;
if (data->kind == tmp461)
data->groups[groups++] = &tmp461_group;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data, data->groups);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
dev_info(dev, "Detected TI %s chip\n", names[data->kind]);
return 0;
}
static struct i2c_driver tmp401_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "tmp401",
},
.probe_new = 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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