hwmon: (lm78) Stop abusing struct i2c_client for ISA devices
Upcoming changes to the I2C part of the lm78 driver will cause ISA
devices to no longer have a struct i2c_client at hand. So, we must
stop (ab)using it now.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/lm78.c b/drivers/hwmon/lm78.c
index f284ecb..177eadd 100644
--- a/drivers/hwmon/lm78.c
+++ b/drivers/hwmon/lm78.c
@@ -114,22 +114,16 @@
#define DIV_FROM_REG(val) (1 << (val))
-/* There are some complications in a module like this. First off, LM78 chips
- may be both present on the SMBus and the ISA bus, and we have to handle
- those cases separately at some places. Second, there might be several
- LM78 chips available (well, actually, that is probably never done; but
- it is a clean illustration of how to handle a case like that). Finally,
- a specific chip may be attached to *both* ISA and SMBus, and we would
- not like to detect it double. */
-
-/* For ISA chips, we abuse the i2c_client addr and name fields. We also use
- the driver field to differentiate between I2C and ISA chips. */
struct lm78_data {
struct i2c_client client;
struct device *hwmon_dev;
struct mutex lock;
enum chips type;
+ /* For ISA device only */
+ const char *name;
+ int isa_addr;
+
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
@@ -536,7 +530,7 @@
{
struct lm78_data *data = dev_get_drvdata(dev);
- return sprintf(buf, "%s\n", data->client.name);
+ return sprintf(buf, "%s\n", data->name);
}
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
@@ -707,7 +701,6 @@
int err;
struct lm78_data *data;
struct resource *res;
- const char *name;
/* Reserve the ISA region */
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
@@ -721,18 +714,16 @@
goto exit_release_region;
}
mutex_init(&data->lock);
- data->client.addr = res->start;
- i2c_set_clientdata(&data->client, data);
+ data->isa_addr = res->start;
platform_set_drvdata(pdev, data);
if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) {
data->type = lm79;
- name = "lm79";
+ data->name = "lm79";
} else {
data->type = lm78;
- name = "lm78";
+ data->name = "lm78";
}
- strlcpy(data->client.name, name, I2C_NAME_SIZE);
/* Initialize the LM78 chip */
lm78_init_device(data);
@@ -763,13 +754,16 @@
static int __devexit lm78_isa_remove(struct platform_device *pdev)
{
struct lm78_data *data = platform_get_drvdata(pdev);
+ struct resource *res;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&pdev->dev.kobj, &lm78_group);
device_remove_file(&pdev->dev, &dev_attr_name);
- release_region(data->client.addr + LM78_ADDR_REG_OFFSET, 2);
kfree(data);
+ res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ release_region(res->start + LM78_ADDR_REG_OFFSET, 2);
+
return 0;
}
@@ -785,8 +779,8 @@
if (!client->driver) { /* ISA device */
int res;
mutex_lock(&data->lock);
- outb_p(reg, client->addr + LM78_ADDR_REG_OFFSET);
- res = inb_p(client->addr + LM78_DATA_REG_OFFSET);
+ outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET);
+ res = inb_p(data->isa_addr + LM78_DATA_REG_OFFSET);
mutex_unlock(&data->lock);
return res;
} else
@@ -806,8 +800,8 @@
if (!client->driver) { /* ISA device */
mutex_lock(&data->lock);
- outb_p(reg, client->addr + LM78_ADDR_REG_OFFSET);
- outb_p(value, client->addr + LM78_DATA_REG_OFFSET);
+ outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET);
+ outb_p(value, data->isa_addr + LM78_DATA_REG_OFFSET);
mutex_unlock(&data->lock);
return 0;
} else