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hwmon: Convert vt8231 to a platform driver

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Convert the vt8231 driver from the nonsensical i2c-isa hack to a
regular platform driver.

Signed-off-by: Roger Lucas <roger@planbit.co.uk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
This commit is contained in:
Roger Lucas 2007-06-12 21:04:08 +02:00 committed by Mark M. Hoffman
parent 2f6ae15790
commit ec5e1a4b8f
2 changed files with 174 additions and 146 deletions
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3
drivers/hwmon/Kconfig
View File

@ -517,9 +517,8 @@ config SENSORS_VT1211
config SENSORS_VT8231
tristate "VIA VT8231"
depends on I2C && PCI && EXPERIMENTAL
depends on PCI
select HWMON_VID
select I2C_ISA
help
If you say yes here then you get support for the integrated sensors
in the VIA VT8231 device.

317
drivers/hwmon/vt8231.c
View File

@ -29,8 +29,7 @@
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/i2c-isa.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
@ -42,10 +41,7 @@ static int force_addr;
module_param(force_addr, int, 0);
MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");
/* Device address
Note that we can't determine the ISA address until we have initialized
our module */
static unsigned short isa_address;
static struct platform_device *pdev;
#define VT8231_EXTENT 0x80
#define VT8231_BASE_REG 0x70
@ -148,7 +144,9 @@ static inline u8 FAN_TO_REG(long rpm, int div)
#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
struct vt8231_data {
struct i2c_client client;
unsigned short addr;
const char *name;
struct mutex update_lock;
struct class_device *class_dev;
char valid; /* !=0 if following fields are valid */
@ -168,20 +166,20 @@ struct vt8231_data {
};
static struct pci_dev *s_bridge;
static int vt8231_detect(struct i2c_adapter *adapter);
static int vt8231_detach_client(struct i2c_client *client);
static int vt8231_probe(struct platform_device *pdev);
static int vt8231_remove(struct platform_device *pdev);
static struct vt8231_data *vt8231_update_device(struct device *dev);
static void vt8231_init_client(struct i2c_client *client);
static void vt8231_init_device(struct vt8231_data *data);
static inline int vt8231_read_value(struct i2c_client *client, u8 reg)
static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)
{
return inb_p(client->addr + reg);
return inb_p(data->addr + reg);
}
static inline void vt8231_write_value(struct i2c_client *client, u8 reg,
static inline void vt8231_write_value(struct vt8231_data *data, u8 reg,
u8 value)
{
outb_p(value, client->addr + reg);
outb_p(value, data->addr + reg);
}
/* following are the sysfs callback functions */
@ -220,13 +218,12 @@ static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
{
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 vt8231_data *data = i2c_get_clientdata(client);
struct vt8231_data *data = dev_get_drvdata(dev);
unsigned long val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->in_min[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255);
vt8231_write_value(client, regvoltmin[nr], data->in_min[nr]);
vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
@ -236,13 +233,12 @@ static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
{
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 vt8231_data *data = i2c_get_clientdata(client);
struct vt8231_data *data = dev_get_drvdata(dev);
unsigned long val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255);
vt8231_write_value(client, regvoltmax[nr], data->in_max[nr]);
vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]);
mutex_unlock(&data->update_lock);
return count;
}
@ -278,14 +274,13 @@ static ssize_t show_in5_max(struct device *dev, struct device_attribute *attr,
static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct vt8231_data *data = i2c_get_clientdata(client);
struct vt8231_data *data = dev_get_drvdata(dev);
unsigned long val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
0, 255);
vt8231_write_value(client, regvoltmin[5], data->in_min[5]);
vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
mutex_unlock(&data->update_lock);
return count;
}
@ -293,14 +288,13 @@ static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr,
static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct vt8231_data *data = i2c_get_clientdata(client);
struct vt8231_data *data = dev_get_drvdata(dev);
unsigned long val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
0, 255);
vt8231_write_value(client, regvoltmax[5], data->in_max[5]);
vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
mutex_unlock(&data->update_lock);
return count;
}
@ -348,26 +342,24 @@ static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr,
static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct vt8231_data *data = i2c_get_clientdata(client);
struct vt8231_data *data = dev_get_drvdata(dev);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255);
vt8231_write_value(client, regtempmax[0], data->temp_max[0]);
vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct vt8231_data *data = i2c_get_clientdata(client);
struct vt8231_data *data = dev_get_drvdata(dev);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255);
vt8231_write_value(client, regtempmin[0], data->temp_min[0]);
vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
mutex_unlock(&data->update_lock);
return count;
}
@ -404,13 +396,12 @@ static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
{
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 vt8231_data *data = i2c_get_clientdata(client);
struct vt8231_data *data = dev_get_drvdata(dev);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255);
vt8231_write_value(client, regtempmax[nr], data->temp_max[nr]);
vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
mutex_unlock(&data->update_lock);
return count;
}
@ -419,13 +410,12 @@ static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
{
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 vt8231_data *data = i2c_get_clientdata(client);
struct vt8231_data *data = dev_get_drvdata(dev);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255);
vt8231_write_value(client, regtempmin[nr], data->temp_min[nr]);
vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
@ -486,13 +476,12 @@ static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
{
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 vt8231_data *data = i2c_get_clientdata(client);
struct vt8231_data *data = dev_get_drvdata(dev);
int val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
vt8231_write_value(client, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
@ -500,12 +489,11 @@ static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct vt8231_data *data = i2c_get_clientdata(client);
struct vt8231_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
unsigned long val = simple_strtoul(buf, NULL, 10);
int nr = sensor_attr->index;
int old = vt8231_read_value(client, VT8231_REG_FANDIV);
int old = vt8231_read_value(data, VT8231_REG_FANDIV);
long min = FAN_FROM_REG(data->fan_min[nr],
DIV_FROM_REG(data->fan_div[nr]));
@ -516,7 +504,7 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
case 4: data->fan_div[nr] = 2; break;
case 8: data->fan_div[nr] = 3; break;
default:
dev_err(&client->dev, "fan_div value %ld not supported."
dev_err(dev, "fan_div value %ld not supported."
"Choose one of 1, 2, 4 or 8!\n", val);
mutex_unlock(&data->update_lock);
return -EINVAL;
@ -524,10 +512,10 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
/* Correct the fan minimum speed */
data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
vt8231_write_value(client, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
vt8231_write_value(client, VT8231_REG_FANDIV, old);
vt8231_write_value(data, VT8231_REG_FANDIV, old);
mutex_unlock(&data->update_lock);
return count;
}
@ -551,9 +539,16 @@ static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
struct vt8231_data *data = vt8231_update_device(dev);
return sprintf(buf, "%d\n", data->alarms);
}
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static ssize_t show_name(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct vt8231_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", data->name);
}
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
static struct attribute *vt8231_attributes_temps[6][4] = {
{
&dev_attr_temp1_input.attr,
@ -648,6 +643,7 @@ static struct attribute *vt8231_attributes[] = {
&sensor_dev_attr_fan1_div.dev_attr.attr,
&sensor_dev_attr_fan2_div.dev_attr.attr,
&dev_attr_alarms.attr,
&dev_attr_name.attr,
NULL
};
@ -655,13 +651,13 @@ static const struct attribute_group vt8231_group = {
.attrs = vt8231_attributes,
};
static struct i2c_driver vt8231_driver = {
static struct platform_driver vt8231_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "vt8231",
},
.attach_adapter = vt8231_detect,
.detach_client = vt8231_detach_client,
.probe = vt8231_probe,
.remove = __devexit_p(vt8231_remove),
};
static struct pci_device_id vt8231_pci_ids[] = {
@ -680,40 +676,18 @@ static struct pci_driver vt8231_pci_driver = {
.probe = vt8231_pci_probe,
};
int vt8231_detect(struct i2c_adapter *adapter)
int vt8231_probe(struct platform_device *pdev)
{
struct i2c_client *client;
struct resource *res;
struct vt8231_data *data;
int err = 0, i;
u16 val;
/* 8231 requires multiple of 256 */
if (force_addr) {
isa_address = force_addr & 0xFF00;
dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n",
isa_address);
if (PCIBIOS_SUCCESSFUL != pci_write_config_word(s_bridge,
VT8231_BASE_REG, isa_address))
return -ENODEV;
}
if (PCIBIOS_SUCCESSFUL !=
pci_read_config_word(s_bridge, VT8231_ENABLE_REG, &val))
return -ENODEV;
if (!(val & 0x0001)) {
dev_warn(&adapter->dev, "enabling sensors\n");
if (PCIBIOS_SUCCESSFUL !=
pci_write_config_word(s_bridge, VT8231_ENABLE_REG,
val | 0x0001))
return -ENODEV;
}
/* Reserve the ISA region */
if (!request_region(isa_address, VT8231_EXTENT,
vt8231_pci_driver.name)) {
dev_err(&adapter->dev, "region 0x%x already in use!\n",
isa_address);
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!request_region(res->start, VT8231_EXTENT,
vt8231_driver.driver.name)) {
dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
(unsigned long)res->start, (unsigned long)res->end);
return -ENODEV;
}
@ -722,33 +696,23 @@ int vt8231_detect(struct i2c_adapter *adapter)
goto exit_release;
}
client = &data->client;
i2c_set_clientdata(client, data);
client->addr = isa_address;
client->adapter = adapter;
client->driver = &vt8231_driver;
/* Fill in the remaining client fields and put into the global list */
strlcpy(client->name, "vt8231", I2C_NAME_SIZE);
platform_set_drvdata(pdev, data);
data->addr = res->start;
data->name = "vt8231";
mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(client)))
goto exit_free;
vt8231_init_client(client);
vt8231_init_device(data);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&client->dev.kobj, &vt8231_group)))
goto exit_detach;
if ((err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group)))
goto exit_free;
/* Must update device information to find out the config field */
data->uch_config = vt8231_read_value(client, VT8231_REG_UCH_CONFIG);
data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
if (ISTEMP(i, data->uch_config)) {
if ((err = sysfs_create_group(&client->dev.kobj,
if ((err = sysfs_create_group(&pdev->dev.kobj,
&vt8231_group_temps[i])))
goto exit_remove_files;
}
@ -756,13 +720,13 @@ int vt8231_detect(struct i2c_adapter *adapter)
for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
if (ISVOLT(i, data->uch_config)) {
if ((err = sysfs_create_group(&client->dev.kobj,
if ((err = sysfs_create_group(&pdev->dev.kobj,
&vt8231_group_volts[i])))
goto exit_remove_files;
}
}
data->class_dev = hwmon_device_register(&client->dev);
data->class_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->class_dev)) {
err = PTR_ERR(data->class_dev);
goto exit_remove_files;
@ -771,56 +735,51 @@ int vt8231_detect(struct i2c_adapter *adapter)
exit_remove_files:
for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
sysfs_remove_group(&client->dev.kobj, &vt8231_group_volts[i]);
sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
sysfs_remove_group(&client->dev.kobj, &vt8231_group_temps[i]);
sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
sysfs_remove_group(&client->dev.kobj, &vt8231_group);
exit_detach:
i2c_detach_client(client);
exit_free:
kfree(data);
exit_release:
release_region(isa_address, VT8231_EXTENT);
release_region(res->start, VT8231_EXTENT);
return err;
}
static int vt8231_detach_client(struct i2c_client *client)
static int vt8231_remove(struct platform_device *pdev)
{
struct vt8231_data *data = i2c_get_clientdata(client);
int err, i;
struct vt8231_data *data = platform_get_drvdata(pdev);
int i;
hwmon_device_unregister(data->class_dev);
for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
sysfs_remove_group(&client->dev.kobj, &vt8231_group_volts[i]);
sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
sysfs_remove_group(&client->dev.kobj, &vt8231_group_temps[i]);
sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
sysfs_remove_group(&client->dev.kobj, &vt8231_group);
sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
if ((err = i2c_detach_client(client))) {
return err;
}
release_region(client->addr, VT8231_EXTENT);
release_region(data->addr, VT8231_EXTENT);
platform_set_drvdata(pdev, NULL);
kfree(data);
return 0;
}
static void vt8231_init_client(struct i2c_client *client)
static void vt8231_init_device(struct vt8231_data *data)
{
vt8231_write_value(client, VT8231_REG_TEMP1_CONFIG, 0);
vt8231_write_value(client, VT8231_REG_TEMP2_CONFIG, 0);
vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
}
static struct vt8231_data *vt8231_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct vt8231_data *data = i2c_get_clientdata(client);
struct vt8231_data *data = dev_get_drvdata(dev);
int i;
u16 low;
@ -830,41 +789,41 @@ static struct vt8231_data *vt8231_update_device(struct device *dev)
|| !data->valid) {
for (i = 0; i < 6; i++) {
if (ISVOLT(i, data->uch_config)) {
data->in[i] = vt8231_read_value(client,
data->in[i] = vt8231_read_value(data,
regvolt[i]);
data->in_min[i] = vt8231_read_value(client,
data->in_min[i] = vt8231_read_value(data,
regvoltmin[i]);
data->in_max[i] = vt8231_read_value(client,
data->in_max[i] = vt8231_read_value(data,
regvoltmax[i]);
}
}
for (i = 0; i < 2; i++) {
data->fan[i] = vt8231_read_value(client,
data->fan[i] = vt8231_read_value(data,
VT8231_REG_FAN(i));
data->fan_min[i] = vt8231_read_value(client,
data->fan_min[i] = vt8231_read_value(data,
VT8231_REG_FAN_MIN(i));
}
low = vt8231_read_value(client, VT8231_REG_TEMP_LOW01);
low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
low = (low >> 6) | ((low & 0x30) >> 2)
| (vt8231_read_value(client, VT8231_REG_TEMP_LOW25) << 4);
| (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
for (i = 0; i < 6; i++) {
if (ISTEMP(i, data->uch_config)) {
data->temp[i] = (vt8231_read_value(client,
data->temp[i] = (vt8231_read_value(data,
regtemp[i]) << 2)
| ((low >> (2 * i)) & 0x03);
data->temp_max[i] = vt8231_read_value(client,
data->temp_max[i] = vt8231_read_value(data,
regtempmax[i]);
data->temp_min[i] = vt8231_read_value(client,
data->temp_min[i] = vt8231_read_value(data,
regtempmin[i]);
}
}
i = vt8231_read_value(client, VT8231_REG_FANDIV);
i = vt8231_read_value(data, VT8231_REG_FANDIV);
data->fan_div[0] = (i >> 4) & 0x03;
data->fan_div[1] = i >> 6;
data->alarms = vt8231_read_value(client, VT8231_REG_ALARM1) |
(vt8231_read_value(client, VT8231_REG_ALARM2) << 8);
data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
(vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
/* Set alarm flags correctly */
if (!data->fan[0] && data->fan_min[0]) {
@ -888,33 +847,102 @@ static struct vt8231_data *vt8231_update_device(struct device *dev)
return data;
}
static int __devinit vt8231_device_add(unsigned short address)
{
struct resource res = {
.start = address,
.end = address + VT8231_EXTENT - 1,
.name = "vt8231",
.flags = IORESOURCE_IO,
};
int err;
pdev = platform_device_alloc("vt8231", address);
if (!pdev) {
err = -ENOMEM;
printk(KERN_ERR "vt8231: Device allocation failed\n");
goto exit;
}
err = platform_device_add_resources(pdev, &res, 1);
if (err) {
printk(KERN_ERR "vt8231: Device resource addition failed "
"(%d)\n", err);
goto exit_device_put;
}
err = platform_device_add(pdev);
if (err) {
printk(KERN_ERR "vt8231: Device addition failed (%d)\n",
err);
goto exit_device_put;
}
return 0;
exit_device_put:
platform_device_put(pdev);
exit:
return err;
}
static int __devinit vt8231_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
u16 val;
u16 address, val;
if (force_addr) {
address = force_addr & 0xff00;
dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
address);
if (PCIBIOS_SUCCESSFUL !=
pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
return -ENODEV;
}
if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
&val))
return -ENODEV;
isa_address = val & ~(VT8231_EXTENT - 1);
if (isa_address == 0 && force_addr == 0) {
address = val & ~(VT8231_EXTENT - 1);
if (address == 0) {
dev_err(&dev->dev, "base address not set -\
upgrade BIOS or use force_addr=0xaddr\n");
return -ENODEV;
}
s_bridge = pci_dev_get(dev);
if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG,
&val))
return -ENODEV;
if (i2c_isa_add_driver(&vt8231_driver)) {
pci_dev_put(s_bridge);
s_bridge = NULL;
if (!(val & 0x0001)) {
dev_warn(&dev->dev, "enabling sensors\n");
if (PCIBIOS_SUCCESSFUL !=
pci_write_config_word(dev, VT8231_ENABLE_REG,
val | 0x0001))
return -ENODEV;
}
if (platform_driver_register(&vt8231_driver))
goto exit;
/* Sets global pdev as a side effect */
if (vt8231_device_add(address))
goto exit_unregister;
/* Always return failure here. This is to allow other drivers to bind
* to this pci device. We don't really want to have control over the
* pci device, we only wanted to read as few register values from it.
*/
/* We do, however, mark ourselves as using the PCI device to stop it
getting unloaded. */
s_bridge = pci_dev_get(dev);
return -ENODEV;
exit_unregister:
platform_driver_unregister(&vt8231_driver);
exit:
return -ENODEV;
}
@ -927,7 +955,8 @@ static void __exit sm_vt8231_exit(void)
{
pci_unregister_driver(&vt8231_pci_driver);
if (s_bridge != NULL) {
i2c_isa_del_driver(&vt8231_driver);
platform_device_unregister(pdev);
platform_driver_unregister(&vt8231_driver);
pci_dev_put(s_bridge);
s_bridge = NULL;
}