1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  *  Dell WMI descriptor driver
4  *
5  *  Copyright (c) 2017 Dell Inc.
6  */
7 
8 #ifndef _DELL_WMI_DESCRIPTOR_H_
9 #define _DELL_WMI_DESCRIPTOR_H_
10 
11 #include <linux/wmi.h>
12 
13 /* possible return values:
14  *  -ENODEV: Descriptor GUID missing from WMI bus
15  *  -EPROBE_DEFER: probing for dell-wmi-descriptor not yet run
16  *  0: valid descriptor, successfully probed
17  *  < 0: invalid descriptor, don't probe dependent devices
18  */
19 int dell_wmi_get_descriptor_valid(void);
20 
21 bool dell_wmi_get_interface_version(u32 *version);
22 bool dell_wmi_get_size(u32 *size);
23 bool dell_wmi_get_hotfix(u32 *hotfix);
24 
25 #endif
26