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dock: add 'type' sysfs file 

add a sysfs file to present dock type. Suggested by Holger.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Shaohua Li 2008-08-28 10:07:45 +08:00 committed by Len Brown
parent 61b8369583
commit 8652b00fd6
1 changed files with 25 additions and 0 deletions
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25
drivers/acpi/dock.c
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@ -911,6 +911,26 @@ static ssize_t show_dock_uid(struct device *dev,
}
static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL);
static ssize_t show_dock_type(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dock_station *dock_station = *((struct dock_station **)
dev->platform_data);
char *type;
if (dock_station->flags & DOCK_IS_DOCK)
type = "dock_station";
else if (dock_station->flags & DOCK_IS_ATA)
type = "ata_bay";
else if (dock_station->flags & DOCK_IS_BAT)
type = "battery_bay";
else
type = "unknown";
return snprintf(buf, PAGE_SIZE, "%s\n", type);
}
static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL);
/**
* dock_add - add a new dock station
* @handle: the dock station handle
@ -999,6 +1019,9 @@ static int dock_add(acpi_handle handle)
dock_station = NULL;
return ret;
}
ret = device_create_file(&dock_device->dev, &dev_attr_type);
if (ret)
printk(KERN_ERR"Error %d adding sysfs file\n", ret);
/* Find dependent devices */
acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
@ -1020,6 +1043,7 @@ static int dock_add(acpi_handle handle)
return 0;
dock_add_err_unregister:
device_remove_file(&dock_device->dev, &dev_attr_type);
device_remove_file(&dock_device->dev, &dev_attr_docked);
device_remove_file(&dock_device->dev, &dev_attr_undock);
device_remove_file(&dock_device->dev, &dev_attr_uid);
@ -1047,6 +1071,7 @@ static int dock_remove(struct dock_station *dock_station)
kfree(dd);
/* cleanup sysfs */
device_remove_file(&dock_device->dev, &dev_attr_type);
device_remove_file(&dock_device->dev, &dev_attr_docked);
device_remove_file(&dock_device->dev, &dev_attr_undock);
device_remove_file(&dock_device->dev, &dev_attr_uid);