diff options
| -rw-r--r-- | drivers/misc/acer-wmi.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/drivers/misc/acer-wmi.c b/drivers/misc/acer-wmi.c index dd0b8d8b5bd9..d8b8574e303c 100644 --- a/drivers/misc/acer-wmi.c +++ b/drivers/misc/acer-wmi.c @@ -35,6 +35,7 @@ #include <linux/platform_device.h> #include <linux/acpi.h> #include <linux/i8042.h> +#include <linux/debugfs.h> #include <acpi/acpi_drivers.h> @@ -152,6 +153,12 @@ 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 +169,9 @@ 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 */ @@ -956,6 +966,28 @@ 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 */ static int __devinit acer_platform_probe(struct platform_device *device) @@ -1114,6 +1146,33 @@ 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; @@ -1173,6 +1232,13 @@ 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(); |
