forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
748 lines
20 KiB
748 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* tmp401.c |
|
* |
|
* Copyright (C) 2007,2008 Hans de Goede <[email protected]> |
|
* Preliminary tmp411 support by: |
|
* Gabriel Konat, Sander Leget, Wouter Willems |
|
* Copyright (C) 2009 Andre Prendel <[email protected]> |
|
* |
|
* Cleanup and support for TMP431 and TMP432 by Guenter Roeck |
|
* Copyright (c) 2013 Guenter Roeck <[email protected]> |
|
*/ |
|
|
|
/* |
|
* 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 <[email protected]>"); |
|
MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver"); |
|
MODULE_LICENSE("GPL");
|
|
|