Merge commit 'jk/jk-merge'

[linux-2.6-omap-h63xx.git] / drivers / misc / acer-wmi.c

diff --git a/drivers/misc/acer-wmi.c b/drivers/misc/acer-wmi.c
index dd0b8d8b5bd96fa51e5035b83f0f75b8a3e793ed..e7a3fe508dff00c9cd9d0e8db8a5227e487f3737 100644 (file)
--- a/drivers/misc/acer-wmi.c
+++ b/drivers/misc/acer-wmi.c
@@ -22,8 +22,6 @@
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#define ACER_WMI_VERSION       "0.1"
-
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
@@ -35,6 +33,7 @@
 #include <linux/platform_device.h>
 #include <linux/acpi.h>
 #include <linux/i8042.h>
+#include <linux/debugfs.h>
 
 #include <acpi/acpi_drivers.h>
 
@@ -152,6 +151,12 @@ struct acer_data {
        int brightness;
 };
 
+struct acer_debug {
+       struct dentry *root;
+       struct dentry *devices;
+       u32 wmid_devices;
+};
+
 /* Each low-level interface must define at least some of the following */
 struct wmi_interface {
        /* The WMI device type */
@@ -162,6 +167,9 @@ struct wmi_interface {
 
        /* Private data for the current interface */
        struct acer_data data;
+
+       /* debugfs entries associated with this interface */
+       struct acer_debug debug;
 };
 
 /* The static interface pointer, points to the currently detected interface */
@@ -955,6 +963,28 @@ static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
 static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
        show_interface, NULL);
 
+/*
+ * debugfs functions
+ */
+static u32 get_wmid_devices(void)
+{
+       struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
+       union acpi_object *obj;
+       acpi_status status;
+
+       status = wmi_query_block(WMID_GUID2, 1, &out);
+       if (ACPI_FAILURE(status))
+               return 0;
+
+       obj = (union acpi_object *) out.pointer;
+       if (obj && obj->type == ACPI_TYPE_BUFFER &&
+               obj->buffer.length == sizeof(u32)) {
+               return *((u32 *) obj->buffer.pointer);
+       } else {
+               return 0;
+       }
+}
+
 /*
  * Platform device
  */
@@ -1114,12 +1144,38 @@ error_sysfs:
        return retval;
 }
 
+static void remove_debugfs(void)
+{
+       debugfs_remove(interface->debug.devices);
+       debugfs_remove(interface->debug.root);
+}
+
+static int create_debugfs(void)
+{
+       interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
+       if (!interface->debug.root) {
+               printk(ACER_ERR "Failed to create debugfs directory");
+               return -ENOMEM;
+       }
+
+       interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
+                                       interface->debug.root,
+                                       &interface->debug.wmid_devices);
+       if (!interface->debug.devices)
+               goto error_debugfs;
+
+       return 0;
+
+error_debugfs:
+               remove_debugfs();
+       return -ENOMEM;
+}
+
 static int __init acer_wmi_init(void)
 {
        int err;
 
-       printk(ACER_INFO "Acer Laptop ACPI-WMI Extras version %s\n",
-                       ACER_WMI_VERSION);
+       printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
 
        find_quirks();
 
@@ -1173,6 +1229,13 @@ static int __init acer_wmi_init(void)
        if (err)
                return err;
 
+       if (wmi_has_guid(WMID_GUID2)) {
+               interface->debug.wmid_devices = get_wmid_devices();
+               err = create_debugfs();
+               if (err)
+                       return err;
+       }
+
        /* Override any initial settings with values from the commandline */
        acer_commandline_init();