add a sysfs file to present dock type. Suggested by Holger.
Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx>
---
drivers/acpi/dock.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
Index: linux/drivers/acpi/dock.c
===================================================================
--- linux.orig/drivers/acpi/dock.c 2008-08-28 09:49:00.000000000 +0800
+++ linux/drivers/acpi/dock.c 2008-08-28 09:53:05.000000000 +0800
@@ -911,6 +911,26 @@ static ssize_t show_dock_uid(struct devi
}
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_stati
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);
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