diff options
| -rw-r--r-- | drivers/platform/x86/wmi.c | 17 | ||||
| -rw-r--r-- | include/linux/wmi.h | 4 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c index 52452ec5099b..250d7b2398b4 100644 --- a/drivers/platform/x86/wmi.c +++ b/drivers/platform/x86/wmi.c @@ -344,6 +344,23 @@ union acpi_object *wmidev_block_query(struct wmi_device *wdev, u8 instance) } EXPORT_SYMBOL_GPL(wmidev_block_query); +struct wmi_device *wmidev_get_other_guid(struct wmi_device *wdev, + const char *guid_string) +{ + struct wmi_block *this_wb = container_of(wdev, struct wmi_block, dev); + struct wmi_block *other_wb; + + if (!find_guid(guid_string, &other_wb)) + return NULL; + + if (other_wb->acpi_device != this_wb->acpi_device) + return NULL; + + get_device(&other_wb->dev.dev); + return &other_wb->dev; +} +EXPORT_SYMBOL_GPL(wmidev_get_other_guid); + /** * wmi_set_block - Write to a WMI block * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba diff --git a/include/linux/wmi.h b/include/linux/wmi.h index 0ab254019488..a283768afb7e 100644 --- a/include/linux/wmi.h +++ b/include/linux/wmi.h @@ -33,6 +33,10 @@ struct wmi_device { extern union acpi_object *wmidev_block_query(struct wmi_device *wdev, u8 instance); +/* Gets another device on the same bus. Caller must put_device the result. */ +extern struct wmi_device *wmidev_get_other_guid(struct wmi_device *wdev, + const char *guid_string); + struct wmi_device_id { const char *guid_string; }; |