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Subject[PATCH 38/85] dock: add 'type' sysfs file
From: Shaohua Li <shaohua.li@intel.com>

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>
---
drivers/acpi/dock.c | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index c877cc5..b7d1581 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -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);
--
1.5.5.1


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