1What:		/sys/bus/platform/devices/GGL0001:*/BINF.2
2Date:		May 2022
3KernelVersion:	5.19
4Description:
5		Returns active EC firmware of current boot (boolean).
6
7		== ===============================
8		0  Read only (recovery) firmware.
9		1  Rewritable firmware.
10		== ===============================
11
12What:		/sys/bus/platform/devices/GGL0001:*/BINF.3
13Date:		May 2022
14KernelVersion:	5.19
15Description:
16		Returns main firmware type for current boot (integer).
17
18		== =====================================
19		0  Recovery.
20		1  Normal.
21		2  Developer.
22		3  Netboot (factory installation only).
23		== =====================================
24
25What:		/sys/bus/platform/devices/GGL0001:*/CHSW
26Date:		May 2022
27KernelVersion:	5.19
28Description:
29		Returns switch position for Chrome OS specific hardware
30		switches when the firmware is booted (integer).
31
32		==== ===========================================
33		0    No changes.
34		2    Recovery button was pressed.
35		4    Recovery button was pressed (EC firmware).
36		32   Developer switch was enabled.
37		512  Firmware write protection was disabled.
38		==== ===========================================
39
40What:		/sys/bus/platform/devices/GGL0001:*/FMAP
41Date:		May 2022
42KernelVersion:	5.19
43Description:
44		Returns physical memory address of the start of the main
45		processor firmware flashmap.
46
47What:		/sys/bus/platform/devices/GGL0001:*/FRID
48Date:		May 2022
49KernelVersion:	5.19
50Description:
51		Returns firmware version for the read-only portion of the
52		main processor firmware.
53
54What:		/sys/bus/platform/devices/GGL0001:*/FWID
55Date:		May 2022
56KernelVersion:	5.19
57Description:
58		Returns firmware version for the rewritable portion of the
59		main processor firmware.
60
61What:		/sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.0
62Date:		May 2022
63KernelVersion:	5.19
64Description:
65		Returns type of the GPIO signal for the Chrome OS specific
66		GPIO assignments (integer).
67
68		=========== ==================================
69		1           Recovery button.
70		2           Developer mode switch.
71		3           Firmware write protection switch.
72		256 to 511  Debug header GPIO 0 to GPIO 255.
73		=========== ==================================
74
75What:		/sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.1
76Date:		May 2022
77KernelVersion:	5.19
78Description:
79		Returns signal attributes of the GPIO signal (integer bitfield).
80
81		== =======================
82		0  Signal is active low.
83		1  Signal is active high.
84		== =======================
85
86What:		/sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.2
87Date:		May 2022
88KernelVersion:	5.19
89Description:
90		Returns the GPIO number on the specified GPIO
91		controller.
92
93What:		/sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.3
94Date:		May 2022
95KernelVersion:	5.19
96Description:
97		Returns name of the GPIO controller.
98
99What:		/sys/bus/platform/devices/GGL0001:*/HWID
100Date:		May 2022
101KernelVersion:	5.19
102Description:
103		Returns hardware ID for the Chromebook.
104
105What:		/sys/bus/platform/devices/GGL0001:*/MECK
106Date:		May 2022
107KernelVersion:	5.19
108Description:
109		Returns the SHA-1 or SHA-256 hash that is read out of the
110		Management Engine extended registers during boot. The hash
111		is exported via ACPI so the OS can verify that the Management
112		Engine firmware has not changed. If Management Engine is not
113		present, or if the firmware was unable to read the extended registers, this buffer size can be zero.
114
115What:		/sys/bus/platform/devices/GGL0001:*/VBNV.0
116Date:		May 2022
117KernelVersion:	5.19
118Description:
119		Returns offset in CMOS bank 0 of the verified boot non-volatile
120		storage block, counting from the first writable CMOS byte
121		(that is, 'offset = 0' is the byte following the 14 bytes of
122		clock data).
123
124What:		/sys/bus/platform/devices/GGL0001:*/VBNV.1
125Date:		May 2022
126KernelVersion:	5.19
127Description:
128		Return the size in bytes of the verified boot non-volatile
129		storage block.
130
131What:		/sys/bus/platform/devices/GGL0001:*/VDAT
132Date:		May 2022
133KernelVersion:	5.19
134Description:
135		Returns the verified boot data block shared between the
136		firmware verification step and the kernel verification step
137		(binary).
138