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linux/drivers/hwmon/lm87.c
Mark M. Hoffman 0501a3816e hwmon: Fix unchecked return status, batch 2 
hwmon: Fix unchecked return status, batch 2

Fix up some hwmon drivers so that they no longer ignore return status
from device_create_file().

Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-28 15:31:17 -07:00

924 lines
27 KiB
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/*
* lm87.c
*
* Copyright (C) 2000 Frodo Looijaard <frodol@dds.nl>
* Philip Edelbrock <phil@netroedge.com>
* Stephen Rousset <stephen.rousset@rocketlogix.com>
* Dan Eaton <dan.eaton@rocketlogix.com>
* Copyright (C) 2004 Jean Delvare <khali@linux-fr.org>
*
* Original port to Linux 2.6 by Jeff Oliver.
*
* The LM87 is a sensor chip made by National Semiconductor. It monitors up
* to 8 voltages (including its own power source), up to three temperatures
* (its own plus up to two external ones) and up to two fans. The default
* configuration is 6 voltages, two temperatures and two fans (see below).
* Voltages are scaled internally with ratios such that the nominal value of
* each voltage correspond to a register value of 192 (which means a
* resolution of about 0.5% of the nominal value). Temperature values are
* reported with a 1 deg resolution and a 3-4 deg accuracy. Complete
* datasheet can be obtained from National's website at:
* http://www.national.com/pf/LM/LM87.html
*
* Some functions share pins, so not all functions are available at the same
* time. Which are depends on the hardware setup. This driver assumes that
* the BIOS configured the chip correctly. In that respect, it differs from
* the original driver (from lm_sensors for Linux 2.4), which would force the
* LM87 to an arbitrary, compile-time chosen mode, regardless of the actual
* chipset wiring.
* For reference, here is the list of exclusive functions:
* - in0+in5 (default) or temp3
* - fan1 (default) or in6
* - fan2 (default) or in7
* - VID lines (default) or IRQ lines (not handled by this driver)
*
* The LM87 additionally features an analog output, supposedly usable to
* control the speed of a fan. All new chips use pulse width modulation
* instead. The LM87 is the only hardware monitoring chipset I know of
* which uses amplitude modulation. Be careful when using this feature.
*
* 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-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
/*
* Addresses to scan
* LM87 has three possible addresses: 0x2c, 0x2d and 0x2e.
*/
static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
/*
* Insmod parameters
*/
I2C_CLIENT_INSMOD_1(lm87);
/*
* The LM87 registers
*/
/* nr in 0..5 */
#define LM87_REG_IN(nr) (0x20 + (nr))
#define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2)
#define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2)
/* nr in 0..1 */
#define LM87_REG_AIN(nr) (0x28 + (nr))
#define LM87_REG_AIN_MIN(nr) (0x1A + (nr))
#define LM87_REG_AIN_MAX(nr) (0x3B + (nr))
static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 };
static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B };
static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
#define LM87_REG_TEMP_HW_INT_LOCK 0x13
#define LM87_REG_TEMP_HW_EXT_LOCK 0x14
#define LM87_REG_TEMP_HW_INT 0x17
#define LM87_REG_TEMP_HW_EXT 0x18
/* nr in 0..1 */
#define LM87_REG_FAN(nr) (0x28 + (nr))
#define LM87_REG_FAN_MIN(nr) (0x3B + (nr))
#define LM87_REG_AOUT 0x19
#define LM87_REG_CONFIG 0x40
#define LM87_REG_CHANNEL_MODE 0x16
#define LM87_REG_VID_FAN_DIV 0x47
#define LM87_REG_VID4 0x49
#define LM87_REG_ALARMS1 0x41
#define LM87_REG_ALARMS2 0x42
#define LM87_REG_COMPANY_ID 0x3E
#define LM87_REG_REVISION 0x3F
/*
* Conversions and various macros
* The LM87 uses signed 8-bit values for temperatures.
*/
#define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192)
#define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \
(val) * 192 >= (scale) * 255 ? 255 : \
((val) * 192 + (scale)/2) / (scale))
#define TEMP_FROM_REG(reg) ((reg) * 1000)
#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
(val) >= 126500 ? 127 : \
(((val) < 0 ? (val)-500 : (val)+500) / 1000))
#define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \
1350000 + (reg)*(div) / 2) / ((reg)*(div))
#define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \
(1350000 + (val)*(div) / 2) / ((val)*(div)))
#define FAN_DIV_FROM_REG(reg) (1 << (reg))
/* analog out is 9.80mV/LSB */
#define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10)
#define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \
(val) >= 2500 ? 255 : \
((val) * 10 + 49) / 98)
/* nr in 0..1 */
#define CHAN_NO_FAN(nr) (1 << (nr))
#define CHAN_TEMP3 (1 << 2)
#define CHAN_VCC_5V (1 << 3)
#define CHAN_NO_VID (1 << 8)
/*
* Functions declaration
*/
static int lm87_attach_adapter(struct i2c_adapter *adapter);
static int lm87_detect(struct i2c_adapter *adapter, int address, int kind);
static void lm87_init_client(struct i2c_client *client);
static int lm87_detach_client(struct i2c_client *client);
static struct lm87_data *lm87_update_device(struct device *dev);
/*
* Driver data (common to all clients)
*/
static struct i2c_driver lm87_driver = {
.driver = {
.name = "lm87",
},
.id = I2C_DRIVERID_LM87,
.attach_adapter = lm87_attach_adapter,
.detach_client = lm87_detach_client,
};
/*
* Client data (each client gets its own)
*/
struct lm87_data {
struct i2c_client client;
struct class_device *class_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* In jiffies */
u8 channel; /* register value */
u8 in[8]; /* register value */
u8 in_max[8]; /* register value */
u8 in_min[8]; /* register value */
u16 in_scale[8];
s8 temp[3]; /* register value */
s8 temp_high[3]; /* register value */
s8 temp_low[3]; /* register value */
s8 temp_crit_int; /* min of two register values */
s8 temp_crit_ext; /* min of two register values */
u8 fan[2]; /* register value */
u8 fan_min[2]; /* register value */
u8 fan_div[2]; /* register value, shifted right */
u8 aout; /* register value */
u16 alarms; /* register values, combined */
u8 vid; /* register values, combined */
u8 vrm;
};
/*
* Sysfs stuff
*/
static inline int lm87_read_value(struct i2c_client *client, u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
{
return i2c_smbus_write_byte_data(client, reg, value);
}
#define show_in(offset) \
static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
data->in_scale[offset])); \
} \
static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
data->in_scale[offset])); \
} \
static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
data->in_scale[offset])); \
} \
static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
show_in##offset##_input, NULL);
show_in(0);
show_in(1);
show_in(2);
show_in(3);
show_in(4);
show_in(5);
show_in(6);
show_in(7);
static void set_in_min(struct device *dev, const char *buf, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]);
lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) :
LM87_REG_AIN_MIN(nr-6), data->in_min[nr]);
mutex_unlock(&data->update_lock);
}
static void set_in_max(struct device *dev, const char *buf, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]);
lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) :
LM87_REG_AIN_MAX(nr-6), data->in_max[nr]);
mutex_unlock(&data->update_lock);
}
#define set_in(offset) \
static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
set_in_min(dev, buf, offset); \
return count; \
} \
static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
set_in_max(dev, buf, offset); \
return count; \
} \
static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
show_in##offset##_min, set_in##offset##_min); \
static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
show_in##offset##_max, set_in##offset##_max);
set_in(0);
set_in(1);
set_in(2);
set_in(3);
set_in(4);
set_in(5);
set_in(6);
set_in(7);
#define show_temp(offset) \
static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
} \
static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \
} \
static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \
}\
static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
show_temp##offset##_input, NULL);
show_temp(1);
show_temp(2);
show_temp(3);
static void set_temp_low(struct device *dev, const char *buf, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_low[nr] = TEMP_TO_REG(val);
lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]);
mutex_unlock(&data->update_lock);
}
static void set_temp_high(struct device *dev, const char *buf, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_high[nr] = TEMP_TO_REG(val);
lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]);
mutex_unlock(&data->update_lock);
}
#define set_temp(offset) \
static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
set_temp_low(dev, buf, offset-1); \
return count; \
} \
static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
set_temp_high(dev, buf, offset-1); \
return count; \
} \
static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
show_temp##offset##_high, set_temp##offset##_high); \
static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
show_temp##offset##_low, set_temp##offset##_low);
set_temp(1);
set_temp(2);
set_temp(3);
static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf)
{
struct lm87_data *data = lm87_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
}
static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf)
{
struct lm87_data *data = lm87_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
}
static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL);
static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL);
static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL);
#define show_fan(offset) \
static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \
FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
} \
static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \
FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
} \
static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \
} \
static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
show_fan##offset##_input, NULL);
show_fan(1);
show_fan(2);
static void set_fan_min(struct device *dev, const char *buf, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->fan_min[nr] = FAN_TO_REG(val,
FAN_DIV_FROM_REG(data->fan_div[nr]));
lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]);
mutex_unlock(&data->update_lock);
}
/* Note: we save and restore the fan minimum here, because its value is
determined in part by the fan clock divider. This follows the principle
of least surprise; the user doesn't expect the fan minimum to change just
because the divider changed. */
static ssize_t set_fan_div(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
unsigned long min;
u8 reg;
mutex_lock(&data->update_lock);
min = FAN_FROM_REG(data->fan_min[nr],
FAN_DIV_FROM_REG(data->fan_div[nr]));
switch (val) {
case 1: data->fan_div[nr] = 0; break;
case 2: data->fan_div[nr] = 1; break;
case 4: data->fan_div[nr] = 2; break;
case 8: data->fan_div[nr] = 3; break;
default:
mutex_unlock(&data->update_lock);
return -EINVAL;
}
reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
switch (nr) {
case 0:
reg = (reg & 0xCF) | (data->fan_div[0] << 4);
break;
case 1:
reg = (reg & 0x3F) | (data->fan_div[1] << 6);
break;
}
lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg);
data->fan_min[nr] = FAN_TO_REG(min, val);
lm87_write_value(client, LM87_REG_FAN_MIN(nr),
data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
#define set_fan(offset) \
static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
size_t count) \
{ \
set_fan_min(dev, buf, offset-1); \
return count; \
} \
static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
size_t count) \
{ \
return set_fan_div(dev, buf, count, offset-1); \
} \
static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
show_fan##offset##_min, set_fan##offset##_min); \
static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
show_fan##offset##_div, set_fan##offset##_div);
set_fan(1);
set_fan(2);
static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
{
struct lm87_data *data = lm87_update_device(dev);
return sprintf(buf, "%d\n", data->alarms);
}
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
{
struct lm87_data *data = lm87_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 lm87_data *data = lm87_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 lm87_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);
static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf)
{
struct lm87_data *data = lm87_update_device(dev);
return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
}
static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->aout = AOUT_TO_REG(val);
lm87_write_value(client, LM87_REG_AOUT, data->aout);
mutex_unlock(&data->update_lock);
return count;
}
static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
/*
* Real code
*/
static int lm87_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_probe(adapter, &addr_data, lm87_detect);
}
static struct attribute *lm87_attributes[] = {
&dev_attr_in1_input.attr,
&dev_attr_in1_min.attr,
&dev_attr_in1_max.attr,
&dev_attr_in2_input.attr,
&dev_attr_in2_min.attr,
&dev_attr_in2_max.attr,
&dev_attr_in3_input.attr,
&dev_attr_in3_min.attr,
&dev_attr_in3_max.attr,
&dev_attr_in4_input.attr,
&dev_attr_in4_min.attr,
&dev_attr_in4_max.attr,
&dev_attr_temp1_input.attr,
&dev_attr_temp1_max.attr,
&dev_attr_temp1_min.attr,
&dev_attr_temp1_crit.attr,
&dev_attr_temp2_input.attr,
&dev_attr_temp2_max.attr,
&dev_attr_temp2_min.attr,
&dev_attr_temp2_crit.attr,
&dev_attr_alarms.attr,
&dev_attr_aout_output.attr,
NULL
};
static const struct attribute_group lm87_group = {
.attrs = lm87_attributes,
};
static struct attribute *lm87_attributes_opt[] = {
&dev_attr_in6_input.attr,
&dev_attr_in6_min.attr,
&dev_attr_in6_max.attr,
&dev_attr_fan1_input.attr,
&dev_attr_fan1_min.attr,
&dev_attr_fan1_div.attr,
&dev_attr_in7_input.attr,
&dev_attr_in7_min.attr,
&dev_attr_in7_max.attr,
&dev_attr_fan2_input.attr,
&dev_attr_fan2_min.attr,
&dev_attr_fan2_div.attr,
&dev_attr_temp3_input.attr,
&dev_attr_temp3_max.attr,
&dev_attr_temp3_min.attr,
&dev_attr_temp3_crit.attr,
&dev_attr_in0_input.attr,
&dev_attr_in0_min.attr,
&dev_attr_in0_max.attr,
&dev_attr_in5_input.attr,
&dev_attr_in5_min.attr,
&dev_attr_in5_max.attr,
&dev_attr_cpu0_vid.attr,
&dev_attr_vrm.attr,
NULL
};
static const struct attribute_group lm87_group_opt = {
.attrs = lm87_attributes_opt,
};
/*
* The following function does more than just detection. If detection
* succeeds, it also registers the new chip.
*/
static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *new_client;
struct lm87_data *data;
int err = 0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
if (!(data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
/* The common I2C client data is placed right before the
LM87-specific data. */
new_client = &data->client;
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
new_client->driver = &lm87_driver;
new_client->flags = 0;
/* Default to an LM87 if forced */
if (kind == 0)
kind = lm87;
/* Now, we do the remaining detection. */
if (kind < 0) {
u8 rev = lm87_read_value(new_client, LM87_REG_REVISION);
if (rev < 0x01 || rev > 0x08
|| (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)
|| lm87_read_value(new_client, LM87_REG_COMPANY_ID) != 0x02) {
dev_dbg(&adapter->dev,
"LM87 detection failed at 0x%02x.\n",
address);
goto exit_free;
}
}
/* We can fill in the remaining client fields */
strlcpy(new_client->name, "lm87", I2C_NAME_SIZE);
data->valid = 0;
mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
goto exit_free;
/* Initialize the LM87 chip */
lm87_init_client(new_client);
data->in_scale[0] = 2500;
data->in_scale[1] = 2700;
data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300;
data->in_scale[3] = 5000;
data->in_scale[4] = 12000;
data->in_scale[5] = 2700;
data->in_scale[6] = 1875;
data->in_scale[7] = 1875;
/* Register sysfs hooks */
if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group)))
goto exit_detach;
if (data->channel & CHAN_NO_FAN(0)) {
if ((err = device_create_file(&new_client->dev,
&dev_attr_in6_input))
|| (err = device_create_file(&new_client->dev,
&dev_attr_in6_min))
|| (err = device_create_file(&new_client->dev,
&dev_attr_in6_max)))
goto exit_remove;
} else {
if ((err = device_create_file(&new_client->dev,
&dev_attr_fan1_input))
|| (err = device_create_file(&new_client->dev,
&dev_attr_fan1_min))
|| (err = device_create_file(&new_client->dev,
&dev_attr_fan1_div)))
goto exit_remove;
}
if (data->channel & CHAN_NO_FAN(1)) {
if ((err = device_create_file(&new_client->dev,
&dev_attr_in7_input))
|| (err = device_create_file(&new_client->dev,
&dev_attr_in7_min))
|| (err = device_create_file(&new_client->dev,
&dev_attr_in7_max)))
goto exit_remove;
} else {
if ((err = device_create_file(&new_client->dev,
&dev_attr_fan2_input))
|| (err = device_create_file(&new_client->dev,
&dev_attr_fan2_min))
|| (err = device_create_file(&new_client->dev,
&dev_attr_fan2_div)))
goto exit_remove;
}
if (data->channel & CHAN_TEMP3) {
if ((err = device_create_file(&new_client->dev,
&dev_attr_temp3_input))
|| (err = device_create_file(&new_client->dev,
&dev_attr_temp3_max))
|| (err = device_create_file(&new_client->dev,
&dev_attr_temp3_min))
|| (err = device_create_file(&new_client->dev,
&dev_attr_temp3_crit)))
goto exit_remove;
} else {
if ((err = device_create_file(&new_client->dev,
&dev_attr_in0_input))
|| (err = device_create_file(&new_client->dev,
&dev_attr_in0_min))
|| (err = device_create_file(&new_client->dev,
&dev_attr_in0_max))
|| (err = device_create_file(&new_client->dev,
&dev_attr_in5_input))
|| (err = device_create_file(&new_client->dev,
&dev_attr_in5_min))
|| (err = device_create_file(&new_client->dev,
&dev_attr_in5_max)))
goto exit_remove;
}
if (!(data->channel & CHAN_NO_VID)) {
if ((err = device_create_file(&new_client->dev,
&dev_attr_cpu0_vid))
|| (err = device_create_file(&new_client->dev,
&dev_attr_vrm)))
goto exit_remove;
}
data->class_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->class_dev)) {
err = PTR_ERR(data->class_dev);
goto exit_remove;
}
return 0;
exit_remove:
sysfs_remove_group(&new_client->dev.kobj, &lm87_group);
sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt);
exit_detach:
i2c_detach_client(new_client);
exit_free:
kfree(data);
exit:
return err;
}
static void lm87_init_client(struct i2c_client *client)
{
struct lm87_data *data = i2c_get_clientdata(client);
u8 config;
data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
data->vrm = vid_which_vrm();
config = lm87_read_value(client, LM87_REG_CONFIG);
if (!(config & 0x01)) {
int i;
/* Limits are left uninitialized after power-up */
for (i = 1; i < 6; i++) {
lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00);
lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF);
}
for (i = 0; i < 2; i++) {
lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F);
lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00);
lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00);
lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF);
}
if (data->channel & CHAN_TEMP3) {
lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F);
lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00);
} else {
lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00);
lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF);
}
}
if ((config & 0x81) != 0x01) {
/* Start monitoring */
lm87_write_value(client, LM87_REG_CONFIG,
(config & 0xF7) | 0x01);
}
}
static int lm87_detach_client(struct i2c_client *client)
{
struct lm87_data *data = i2c_get_clientdata(client);
int err;
hwmon_device_unregister(data->class_dev);
sysfs_remove_group(&client->dev.kobj, &lm87_group);
sysfs_remove_group(&client->dev.kobj, &lm87_group_opt);
if ((err = i2c_detach_client(client)))
return err;
kfree(data);
return 0;
}
static struct lm87_data *lm87_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
int i, j;
dev_dbg(&client->dev, "Updating data.\n");
i = (data->channel & CHAN_TEMP3) ? 1 : 0;
j = (data->channel & CHAN_TEMP3) ? 5 : 6;
for (; i < j; i++) {
data->in[i] = lm87_read_value(client,
LM87_REG_IN(i));
data->in_min[i] = lm87_read_value(client,
LM87_REG_IN_MIN(i));
data->in_max[i] = lm87_read_value(client,
LM87_REG_IN_MAX(i));
}
for (i = 0; i < 2; i++) {
if (data->channel & CHAN_NO_FAN(i)) {
data->in[6+i] = lm87_read_value(client,
LM87_REG_AIN(i));
data->in_max[6+i] = lm87_read_value(client,
LM87_REG_AIN_MAX(i));
data->in_min[6+i] = lm87_read_value(client,
LM87_REG_AIN_MIN(i));
} else {
data->fan[i] = lm87_read_value(client,
LM87_REG_FAN(i));
data->fan_min[i] = lm87_read_value(client,
LM87_REG_FAN_MIN(i));
}
}
j = (data->channel & CHAN_TEMP3) ? 3 : 2;
for (i = 0 ; i < j; i++) {
data->temp[i] = lm87_read_value(client,
LM87_REG_TEMP[i]);
data->temp_high[i] = lm87_read_value(client,
LM87_REG_TEMP_HIGH[i]);
data->temp_low[i] = lm87_read_value(client,
LM87_REG_TEMP_LOW[i]);
}
i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK);
j = lm87_read_value(client, LM87_REG_TEMP_HW_INT);
data->temp_crit_int = min(i, j);
i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK);
j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT);
data->temp_crit_ext = min(i, j);
i = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
data->fan_div[0] = (i >> 4) & 0x03;
data->fan_div[1] = (i >> 6) & 0x03;
data->vid = (i & 0x0F)
| (lm87_read_value(client, LM87_REG_VID4) & 0x01)
<< 4;
data->alarms = lm87_read_value(client, LM87_REG_ALARMS1)
| (lm87_read_value(client, LM87_REG_ALARMS2)
<< 8);
data->aout = lm87_read_value(client, LM87_REG_AOUT);
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
static int __init sensors_lm87_init(void)
{
return i2c_add_driver(&lm87_driver);
}
static void __exit sensors_lm87_exit(void)
{
i2c_del_driver(&lm87_driver);
}
MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others");
MODULE_DESCRIPTION("LM87 driver");
MODULE_LICENSE("GPL");
module_init(sensors_lm87_init);
module_exit(sensors_lm87_exit);
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