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hwmon/w83793: Hide invalid VID readings 

Ignore the VID readings when the motherboard has not designed
the function.  

Signed-off-by: Gong Jun <jgong@winbond.com>
Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Gong Jun 2007-01-18 22:14:24 +01:00 committed by Jean Delvare
parent c929431528
commit c70a8c345f
1 changed files with 30 additions and 3 deletions
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33
drivers/hwmon/w83793.c
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@ -205,6 +205,7 @@ struct w83793_data {
u8 has_pwm;
u8 has_temp;
u8 has_vid;
u8 pwm_enable; /* Register value, each Temp has 1 bit */
u8 pwm_uptime; /* Register value */
u8 pwm_downtime; /* Register value */
@ -1025,9 +1026,12 @@ static struct sensor_device_attribute_2 w83793_left_pwm[] = {
SENSOR_ATTR_PWM(8),
};
static struct sensor_device_attribute_2 sda_single_files[] = {
static struct sensor_device_attribute_2 w83793_vid[] = {
SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
};
static struct sensor_device_attribute_2 sda_single_files[] = {
SENSOR_ATTR_2(vrm, S_IWUSR | S_IRUGO, show_vrm, store_vrm,
NOT_USED, NOT_USED),
SENSOR_ATTR_2(chassis, S_IWUSR | S_IRUGO, show_alarm_beep,
@ -1080,6 +1084,9 @@ static int w83793_detach_client(struct i2c_client *client)
for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
device_remove_file(dev, &sda_single_files[i].dev_attr);
for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
device_remove_file(dev, &w83793_vid[i].dev_attr);
for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
device_remove_file(dev, &w83793_left_fan[i].dev_attr);
@ -1358,6 +1365,13 @@ static int w83793_detect(struct i2c_adapter *adapter, int address, int kind)
if (tmp & 0x02)
data->has_temp |= 0x20;
/* Detect the VID usage and ignore unused input */
tmp = w83793_read_value(client, W83793_REG_MFC);
if (!(tmp & 0x29))
data->has_vid |= 0x1; /* has VIDA */
if (tmp & 0x80)
data->has_vid |= 0x2; /* has VIDB */
/* Register sysfs hooks */
for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
err = device_create_file(dev,
@ -1366,6 +1380,14 @@ static int w83793_detect(struct i2c_adapter *adapter, int address, int kind)
goto exit_remove;
}
for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
if (!(data->has_vid & (1 << i)))
continue;
err = device_create_file(dev, &w83793_vid[i].dev_attr);
if (err)
goto exit_remove;
}
for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
err = device_create_file(dev, &sda_single_files[i].dev_attr);
if (err)
@ -1429,6 +1451,9 @@ exit_remove:
for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
device_remove_file(dev, &sda_single_files[i].dev_attr);
for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
device_remove_file(dev, &w83793_vid[i].dev_attr);
for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
device_remove_file(dev, &w83793_left_fan[i].dev_attr);
@ -1593,8 +1618,10 @@ static struct w83793_data *w83793_update_device(struct device *dev)
for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
data->alarms[i] =
w83793_read_value(client, W83793_REG_ALARM(i));
data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
if (data->has_vid & 0x01)
data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
if (data->has_vid & 0x02)
data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
w83793_update_nonvolatile(dev);
data->last_updated = jiffies;
data->valid = 1;