redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

[PATCH] smsc47m192: New hwmon driver for SMSC LPC47M192/997 

New driver (smsc47m192) which supports voltage and temperature
measurement features of SMSC LPC47M192 and LPC47M997 chips.

Signed-off-by: Hartmut Rick <linux@rick.claranet.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Hartmut Rick 2006-03-23 16:37:23 +01:00 committed by Greg Kroah-Hartman
parent a4589dbb4e
commit 59ac83677f
5 changed files with 779 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

102
Documentation/hwmon/smsc47m192 100644
View File

@ -0,0 +1,102 @@
Kernel driver smsc47m192
========================
Supported chips:
* SMSC LPC47M192 and LPC47M997
Prefix: 'smsc47m192'
Addresses scanned: I2C 0x2c - 0x2d
Datasheet: The datasheet for LPC47M192 is publicly available from
http://www.smsc.com/
The LPC47M997 is compatible for hardware monitoring.
Author: Hartmut Rick <linux@rick.claranet.de>
Special thanks to Jean Delvare for careful checking
of the code and many helpful comments and suggestions.
Description
-----------
This driver implements support for the hardware sensor capabilities
of the SMSC LPC47M192 and LPC47M997 Super-I/O chips.
These chips support 3 temperature channels and 8 voltage inputs
as well as CPU voltage VID input.
They do also have fan monitoring and control capabilities, but the
these features are accessed via ISA bus and are not supported by this
driver. Use the 'smsc47m1' driver for fan monitoring and control.
Voltages and temperatures are measured by an 8-bit ADC, the resolution
of the temperatures is 1 bit per degree C.
Voltages are scaled such that the nominal voltage corresponds to
192 counts, i.e. 3/4 of the full range. Thus the available range for
each voltage channel is 0V ... 255/192*(nominal voltage), the resolution
is 1 bit per (nominal voltage)/192.
Both voltage and temperature values are scaled by 1000, the sys files
show voltages in mV and temperatures in units of 0.001 degC.
The +12V analog voltage input channel (in4_input) is multiplexed with
bit 4 of the encoded CPU voltage. This means that you either get
a +12V voltage measurement or a 5 bit CPU VID, but not both.
The default setting is to use the pin as 12V input, and use only 4 bit VID.
This driver assumes that the information in the configuration register
is correct, i.e. that the BIOS has updated the configuration if
the motherboard has this input wired to VID4.
The temperature and voltage readings are updated once every 1.5 seconds.
Reading them more often repeats the same values.
sysfs interface
---------------
in0_input - +2.5V voltage input
in1_input - CPU voltage input (nominal 2.25V)
in2_input - +3.3V voltage input
in3_input - +5V voltage input
in4_input - +12V voltage input (may be missing if used as VID4)
in5_input - Vcc voltage input (nominal 3.3V)
This is the supply voltage of the sensor chip itself.
in6_input - +1.5V voltage input
in7_input - +1.8V voltage input
in[0-7]_min,
in[0-7]_max - lower and upper alarm thresholds for in[0-7]_input reading
All voltages are read and written in mV.
in[0-7]_alarm - alarm flags for voltage inputs
These files read '1' in case of alarm, '0' otherwise.
temp1_input - chip temperature measured by on-chip diode
temp[2-3]_input - temperature measured by external diodes (one of these would
typically be wired to the diode inside the CPU)
temp[1-3]_min,
temp[1-3]_max - lower and upper alarm thresholds for temperatures
temp[1-3]_offset - temperature offset registers
The chip adds the offsets stored in these registers to
the corresponding temperature readings.
Note that temp1 and temp2 offsets share the same register,
they cannot both be different from zero at the same time.
Writing a non-zero number to one of them will reset the other
offset to zero.
All temperatures and offsets are read and written in
units of 0.001 degC.
temp[1-3]_alarm - alarm flags for temperature inputs, '1' in case of alarm,
'0' otherwise.
temp[2-3]_input_fault - diode fault flags for temperature inputs 2 and 3.
A fault is detected if the two pins for the corresponding
sensor are open or shorted, or any of the two is shorted
to ground or Vcc. '1' indicates a diode fault.
cpu0_vid - CPU voltage as received from the CPU
vrm - CPU VID standard used for decoding CPU voltage
The *_min, *_max, *_offset and vrm files can be read and
written, all others are read-only.

6
Documentation/hwmon/sysfs-interface
View File

@ -218,6 +218,12 @@ temp[1-2]_crit_hyst
from the critical value.
Read/Write value.
temp[1-4]_offset
Temperature offset which is added to the temperature reading
by the chip.
Unit: millidegree Celsius
Read/Write value.
If there are multiple temperature sensors, temp1_* is
generally the sensor inside the chip itself,
reported as "motherboard temperature". temp2_* to

23
drivers/hwmon/Kconfig
View File

@ -333,11 +333,32 @@ config SENSORS_SMSC47M1
help
If you say yes here you get support for the integrated fan
monitoring and control capabilities of the SMSC LPC47B27x,
LPC47M10x, LPC47M13x, LPC47M14x, LPC47M15x and LPC47M192 chips.
LPC47M10x, LPC47M13x, LPC47M14x, LPC47M15x, LPC47M192 and
LPC47M997 chips.
The temperature and voltage sensor features of the LPC47M192
and LPC47M997 are supported by another driver, select also
"SMSC LPC47M192 and compatibles" below for those.
This driver can also be built as a module. If so, the module
will be called smsc47m1.
config SENSORS_SMSC47M192
tristate "SMSC LPC47M192 and compatibles"
depends on HWMON && I2C && EXPERIMENTAL
select HWMON_VID
help
If you say yes here you get support for the temperature and
voltage sensors of the SMSC LPC47M192 and LPC47M997 chips.
The fan monitoring and control capabilities of these chips
are supported by another driver, select
"SMSC LPC47M10x and compatibles" above. You need both drivers
if you want fan control and voltage/temperature sensor support.
This driver can also be built as a module. If so, the module
will be called smsc47m192.
config SENSORS_SMSC47B397
tristate "SMSC LPC47B397-NC"
depends on HWMON && I2C && EXPERIMENTAL

1
drivers/hwmon/Makefile
View File

@ -40,6 +40,7 @@ obj-$(CONFIG_SENSORS_PC87360) += pc87360.o
obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o
obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o
obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o
obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o
obj-$(CONFIG_SENSORS_VIA686A) += via686a.o
obj-$(CONFIG_SENSORS_VT8231) += vt8231.o
obj-$(CONFIG_SENSORS_W83627EHF) += w83627ehf.o

648
drivers/hwmon/smsc47m192.c 100644
View File

@ -0,0 +1,648 @@
/*
smsc47m192.c - Support for hardware monitoring block of
SMSC LPC47M192 and LPC47M997 Super I/O chips
Copyright (C) 2006 Hartmut Rick <linux@rick.claranet.de>
Derived from lm78.c and other chip drivers.
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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
/* Insmod parameters */
I2C_CLIENT_INSMOD_1(smsc47m192);
/* SMSC47M192 registers */
#define SMSC47M192_REG_IN(nr) ((nr)<6 ? (0x20 + (nr)) : \
(0x50 + (nr) - 6))
#define SMSC47M192_REG_IN_MAX(nr) ((nr)<6 ? (0x2b + (nr) * 2) : \
(0x54 + (((nr) - 6) * 2)))
#define SMSC47M192_REG_IN_MIN(nr) ((nr)<6 ? (0x2c + (nr) * 2) : \
(0x55 + (((nr) - 6) * 2)))
static u8 SMSC47M192_REG_TEMP[3] = { 0x27, 0x26, 0x52 };
static u8 SMSC47M192_REG_TEMP_MAX[3] = { 0x39, 0x37, 0x58 };
static u8 SMSC47M192_REG_TEMP_MIN[3] = { 0x3A, 0x38, 0x59 };
#define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr)==2 ? 0x1e : 0x1f)
#define SMSC47M192_REG_ALARM1 0x41
#define SMSC47M192_REG_ALARM2 0x42
#define SMSC47M192_REG_VID 0x47
#define SMSC47M192_REG_VID4 0x49
#define SMSC47M192_REG_CONFIG 0x40
#define SMSC47M192_REG_SFR 0x4f
#define SMSC47M192_REG_COMPANY_ID 0x3e
#define SMSC47M192_REG_VERSION 0x3f
/* generalised scaling with integer rounding */
static inline int SCALE(long val, int mul, int div)
{
if (val < 0)
return (val * mul - div / 2) / div;
else
return (val * mul + div / 2) / div;
}
/* Conversions */
/* smsc47m192 internally scales voltage measurements */
static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 };
static inline unsigned int IN_FROM_REG(u8 reg, int n)
{
return SCALE(reg, nom_mv[n], 192);
}
static inline u8 IN_TO_REG(unsigned long val, int n)
{
return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
}
/* TEMP: 0.001 degC units (-128C to +127C)
REG: 1C/bit, two's complement */
static inline s8 TEMP_TO_REG(int val)
{
return SENSORS_LIMIT(SCALE(val, 1, 1000), -128000, 127000);
}
static inline int TEMP_FROM_REG(s8 val)
{
return val * 1000;
}
struct smsc47m192_data {
struct i2c_client client;
struct class_device *class_dev;
struct semaphore update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u8 in[8]; /* Register value */
u8 in_max[8]; /* Register value */
u8 in_min[8]; /* Register value */
s8 temp[3]; /* Register value */
s8 temp_max[3]; /* Register value */
s8 temp_min[3]; /* Register value */
s8 temp_offset[3]; /* Register value */
u16 alarms; /* Register encoding, combined */
u8 vid; /* Register encoding, combined */
u8 vrm;
};
static int smsc47m192_attach_adapter(struct i2c_adapter *adapter);
static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
int kind);
static int smsc47m192_detach_client(struct i2c_client *client);
static struct smsc47m192_data *smsc47m192_update_device(struct device *dev);
static struct i2c_driver smsc47m192_driver = {
.driver = {
.name = "smsc47m192",
},
.attach_adapter = smsc47m192_attach_adapter,
.detach_client = smsc47m192_detach_client,
};
/* Voltages */
static ssize_t show_in(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr));
}
static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr));
}
static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr));
}
static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
down(&data->update_lock);
data->in_min[nr] = IN_TO_REG(val, nr);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr),
data->in_min[nr]);
up(&data->update_lock);
return count;
}
static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
down(&data->update_lock);
data->in_max[nr] = IN_TO_REG(val, nr);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr),
data->in_max[nr]);
up(&data->update_lock);
return count;
}
#define show_in_offset(offset) \
static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
show_in, NULL, offset); \
static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
show_in_min, set_in_min, offset); \
static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
show_in_max, set_in_max, offset);
show_in_offset(0)
show_in_offset(1)
show_in_offset(2)
show_in_offset(3)
show_in_offset(4)
show_in_offset(5)
show_in_offset(6)
show_in_offset(7)
/* Temperatures */
static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
}
static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
}
static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
}
static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
down(&data->update_lock);
data->temp_min[nr] = TEMP_TO_REG(val);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr],
data->temp_min[nr]);
up(&data->update_lock);
return count;
}
static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
down(&data->update_lock);
data->temp_max[nr] = TEMP_TO_REG(val);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr],
data->temp_max[nr]);
up(&data->update_lock);
return count;
}
static ssize_t show_temp_offset(struct device *dev, struct device_attribute
*attr, char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr]));
}
static ssize_t set_temp_offset(struct device *dev, struct device_attribute
*attr, const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
long val = simple_strtol(buf, NULL, 10);
down(&data->update_lock);
data->temp_offset[nr] = TEMP_TO_REG(val);
if (nr>1)
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
else if (data->temp_offset[nr] != 0) {
/* offset[0] and offset[1] share the same register,
SFR bit 4 activates offset[0] */
i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
(sfr & 0xef) | (nr==0 ? 0x10 : 0));
data->temp_offset[1-nr] = 0;
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
} else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0))
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_OFFSET(nr), 0);
up(&data->update_lock);
return count;
}
#define show_temp_index(index) \
static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO, \
show_temp, NULL, index-1); \
static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR, \
show_temp_min, set_temp_min, index-1); \
static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR, \
show_temp_max, set_temp_max, index-1); \
static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR, \
show_temp_offset, set_temp_offset, index-1);
show_temp_index(1)
show_temp_index(2)
show_temp_index(3)
/* VID */
static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
}
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", data->vrm);
}
static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
data->vrm = simple_strtoul(buf, NULL, 10);
return count;
}
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
/* Alarms */
static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0);
}
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040);
static SENSOR_DEVICE_ATTR(temp2_input_fault, S_IRUGO, show_alarm, NULL, 0x4000);
static SENSOR_DEVICE_ATTR(temp3_input_fault, S_IRUGO, show_alarm, NULL, 0x8000);
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004);
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008);
static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100);
static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200);
static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400);
static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800);
/* This function is called when:
* smsc47m192_driver is inserted (when this module is loaded), for each
available adapter
* when a new adapter is inserted (and smsc47m192_driver is still present) */
static int smsc47m192_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_probe(adapter, &addr_data, smsc47m192_detect);
}
static void smsc47m192_init_client(struct i2c_client *client)
{
int i;
u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
/* select cycle mode (pause 1 sec between updates) */
i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
(sfr & 0xfd) | 0x02);
if (!(config & 0x01)) {
/* initialize alarm limits */
for (i=0; i<8; i++) {
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_IN_MIN(i), 0);
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_IN_MAX(i), 0xff);
}
for (i=0; i<3; i++) {
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_MIN[i], 0x80);
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_MAX[i], 0x7f);
}
/* start monitoring */
i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG,
(config & 0xf7) | 0x01);
}
}
/* This function is called by i2c_probe */
static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
int kind)
{
struct i2c_client *client;
struct smsc47m192_data *data;
int err = 0;
int version, config;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
if (!(data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
client = &data->client;
i2c_set_clientdata(client, data);
client->addr = address;
client->adapter = adapter;
client->driver = &smsc47m192_driver;
if (kind == 0)
kind = smsc47m192;
/* Detection criteria from sensors_detect script */
if (kind < 0) {
if (i2c_smbus_read_byte_data(client,
SMSC47M192_REG_COMPANY_ID) == 0x55
&& ((version = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_VERSION)) & 0xf0) == 0x20
&& (i2c_smbus_read_byte_data(client,
SMSC47M192_REG_VID) & 0x70) == 0x00
&& (i2c_smbus_read_byte_data(client,
SMSC47M192_REG_VID4) & 0xfe) == 0x80) {
dev_info(&adapter->dev,
"found SMSC47M192 or SMSC47M997, "
"version 2, stepping A%d\n", version & 0x0f);
} else {
dev_dbg(&adapter->dev,
"SMSC47M192 detection failed at 0x%02x\n",
address);
goto exit_free;
}
}
/* Fill in the remaining client fields and put into the global list */
strlcpy(client->name, "smsc47m192", I2C_NAME_SIZE);
data->vrm = vid_which_vrm();
init_MUTEX(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(client)))
goto exit_free;
/* Initialize the SMSC47M192 chip */
smsc47m192_init_client(client);
/* Register sysfs hooks */
data->class_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->class_dev)) {
err = PTR_ERR(data->class_dev);
goto exit_detach;
}
device_create_file(&client->dev, &sensor_dev_attr_in0_input.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in0_min.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in0_max.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in0_alarm.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in1_input.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in1_min.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in1_max.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in1_alarm.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in2_input.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in2_min.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in2_max.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in2_alarm.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in3_input.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in3_min.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in3_max.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in3_alarm.dev_attr);
/* Pin 110 is either in4 (+12V) or VID4 */
config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
if (!(config & 0x20)) {
device_create_file(&client->dev,
&sensor_dev_attr_in4_input.dev_attr);
device_create_file(&client->dev,
&sensor_dev_attr_in4_min.dev_attr);
device_create_file(&client->dev,
&sensor_dev_attr_in4_max.dev_attr);
device_create_file(&client->dev,
&sensor_dev_attr_in4_alarm.dev_attr);
}
device_create_file(&client->dev, &sensor_dev_attr_in5_input.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in5_min.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in5_max.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in5_alarm.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in6_input.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in6_min.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in6_max.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in6_alarm.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in7_input.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in7_min.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in7_max.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_in7_alarm.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_temp1_input.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_temp1_max.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_temp1_min.dev_attr);
device_create_file(&client->dev,
&sensor_dev_attr_temp1_offset.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_temp1_alarm.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_temp2_input.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_temp2_max.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_temp2_min.dev_attr);
device_create_file(&client->dev,
&sensor_dev_attr_temp2_offset.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_temp2_alarm.dev_attr);
device_create_file(&client->dev,
&sensor_dev_attr_temp2_input_fault.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_temp3_input.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_temp3_max.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_temp3_min.dev_attr);
device_create_file(&client->dev,
&sensor_dev_attr_temp3_offset.dev_attr);
device_create_file(&client->dev, &sensor_dev_attr_temp3_alarm.dev_attr);
device_create_file(&client->dev,
&sensor_dev_attr_temp3_input_fault.dev_attr);
device_create_file(&client->dev, &dev_attr_cpu0_vid);
device_create_file(&client->dev, &dev_attr_vrm);
return 0;
exit_detach:
i2c_detach_client(client);
exit_free:
kfree(data);
exit:
return err;
}
static int smsc47m192_detach_client(struct i2c_client *client)
{
struct smsc47m192_data *data = i2c_get_clientdata(client);
int err;
hwmon_device_unregister(data->class_dev);
if ((err = i2c_detach_client(client)))
return err;
kfree(data);
return 0;
}
static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
int i, config;
down(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
dev_dbg(&client->dev, "Starting smsc47m192 update\n");
for (i = 0; i <= 7; i++) {
data->in[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_IN(i));
data->in_min[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_IN_MIN(i));
data->in_max[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_IN_MAX(i));
}
for (i = 0; i < 3; i++) {
data->temp[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_TEMP[i]);
data->temp_max[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_TEMP_MAX[i]);
data->temp_min[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_TEMP_MIN[i]);
}
for (i = 1; i < 3; i++)
data->temp_offset[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_TEMP_OFFSET(i));
/* first offset is temp_offset[0] if SFR bit 4 is set,
temp_offset[1] otherwise */
if (sfr & 0x10) {
data->temp_offset[0] = data->temp_offset[1];
data->temp_offset[1] = 0;
} else
data->temp_offset[0] = 0;
data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID)
& 0x0f;
config = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_CONFIG);
if (config & 0x20)
data->vid |= (i2c_smbus_read_byte_data(client,
SMSC47M192_REG_VID4) & 0x01) << 4;
data->alarms = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_ALARM1) |
(i2c_smbus_read_byte_data(client,
SMSC47M192_REG_ALARM2) << 8);
data->last_updated = jiffies;
data->valid = 1;
}
up(&data->update_lock);
return data;
}
static int __init smsc47m192_init(void)
{
return i2c_add_driver(&smsc47m192_driver);
}
static void __exit smsc47m192_exit(void)
{
i2c_del_driver(&smsc47m192_driver);
}
MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>");
MODULE_DESCRIPTION("SMSC47M192 driver");
MODULE_LICENSE("GPL");
module_init(smsc47m192_init);
module_exit(smsc47m192_exit);