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hwmon: (pcf8591) Register as a hwmon device 

Register PCF8591 devices as hwmon devices. There's little point in
implementing the standard sysfs interface if we don't register it in
a way libsensors will pick it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Jean Delvare 2010-10-28 20:31:49 +02:00 committed by Jean Delvare
parent 2437710102
commit 4275fcd65d
1 changed files with 12 additions and 0 deletions
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12
drivers/hwmon/pcf8591.c
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@ -23,6 +23,8 @@
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/hwmon.h>
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
@ -71,6 +73,7 @@ MODULE_PARM_DESC(input_mode,
#define REG_TO_SIGNED(reg) (((reg) & 0x80)?((reg) - 256):(reg))
struct pcf8591_data {
struct device *hwmon_dev;
struct mutex update_lock;
u8 control;
@ -221,6 +224,12 @@ static int pcf8591_probe(struct i2c_client *client,
goto exit_sysfs_remove;
}
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_sysfs_remove;
}
return 0;
exit_sysfs_remove:
@ -234,6 +243,9 @@ exit:
static int pcf8591_remove(struct i2c_client *client)
{
struct pcf8591_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group_opt);
sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group);
kfree(i2c_get_clientdata(client));