tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1What: /sys/bus/platform/devices/GGL0001:*/BINF.2
2 /sys/bus/platform/devices/GOOG0016:*/BINF.2
3Date: May 2022
4KernelVersion: 5.19
5Description:
6 Returns active EC firmware of current boot (boolean).
7
8 == ===============================
9 0 Read only (recovery) firmware.
10 1 Rewritable firmware.
11 == ===============================
12
13What: /sys/bus/platform/devices/GGL0001:*/BINF.3
14 /sys/bus/platform/devices/GOOG0016:*/BINF.3
15Date: May 2022
16KernelVersion: 5.19
17Description:
18 Returns main firmware type for current boot (integer).
19
20 == =====================================
21 0 Recovery.
22 1 Normal.
23 2 Developer.
24 3 Netboot (factory installation only).
25 == =====================================
26
27What: /sys/bus/platform/devices/GGL0001:*/CHSW
28 /sys/bus/platform/devices/GOOG0016:*/CHSW
29Date: May 2022
30KernelVersion: 5.19
31Description:
32 Returns switch position for Chrome OS specific hardware
33 switches when the firmware is booted (integer).
34
35 ==== ===========================================
36 0 No changes.
37 2 Recovery button was pressed.
38 4 Recovery button was pressed (EC firmware).
39 32 Developer switch was enabled.
40 512 Firmware write protection was disabled.
41 ==== ===========================================
42
43What: /sys/bus/platform/devices/GGL0001:*/FMAP
44 /sys/bus/platform/devices/GOOG0016:*/FMAP
45Date: May 2022
46KernelVersion: 5.19
47Description:
48 Returns physical memory address of the start of the main
49 processor firmware flashmap.
50
51What: /sys/bus/platform/devices/GGL0001:*/FRID
52 /sys/bus/platform/devices/GOOG0016:*/FRID
53Date: May 2022
54KernelVersion: 5.19
55Description:
56 Returns firmware version for the read-only portion of the
57 main processor firmware.
58
59What: /sys/bus/platform/devices/GGL0001:*/FWID
60 /sys/bus/platform/devices/GOOG0016:*/FWID
61Date: May 2022
62KernelVersion: 5.19
63Description:
64 Returns firmware version for the rewritable portion of the
65 main processor firmware.
66
67What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.0
68 /sys/bus/platform/devices/GOOG0016:*/GPIO.X/GPIO.0
69Date: May 2022
70KernelVersion: 5.19
71Description:
72 Returns type of the GPIO signal for the Chrome OS specific
73 GPIO assignments (integer).
74
75 =========== ==================================
76 1 Recovery button.
77 2 Developer mode switch.
78 3 Firmware write protection switch.
79 256 to 511 Debug header GPIO 0 to GPIO 255.
80 =========== ==================================
81
82What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.1
83 /sys/bus/platform/devices/GOOG0016:*/GPIO.X/GPIO.1
84Date: May 2022
85KernelVersion: 5.19
86Description:
87 Returns signal attributes of the GPIO signal (integer bitfield).
88
89 == =======================
90 0 Signal is active low.
91 1 Signal is active high.
92 == =======================
93
94What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.2
95 /sys/bus/platform/devices/GOOG0016:*/GPIO.X/GPIO.2
96Date: May 2022
97KernelVersion: 5.19
98Description:
99 Returns the GPIO number on the specified GPIO
100 controller.
101
102What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.3
103 /sys/bus/platform/devices/GOOG0016:*/GPIO.X/GPIO.3
104Date: May 2022
105KernelVersion: 5.19
106Description:
107 Returns name of the GPIO controller.
108
109What: /sys/bus/platform/devices/GGL0001:*/HWID
110 /sys/bus/platform/devices/GOOG0016:*/HWID
111Date: May 2022
112KernelVersion: 5.19
113Description:
114 Returns hardware ID for the Chromebook.
115
116What: /sys/bus/platform/devices/GGL0001:*/MECK
117 /sys/bus/platform/devices/GOOG0016:*/MECK
118Date: May 2022
119KernelVersion: 5.19
120Description:
121 Returns the SHA-1 or SHA-256 hash that is read out of the
122 Management Engine extended registers during boot. The hash
123 is exported via ACPI so the OS can verify that the Management
124 Engine firmware has not changed. If Management Engine is not
125 present, or if the firmware was unable to read the extended registers, this buffer size can be zero.
126
127What: /sys/bus/platform/devices/GGL0001:*/VBNV.0
128 /sys/bus/platform/devices/GOOG0016:*/VBNV.0
129Date: May 2022
130KernelVersion: 5.19
131Description:
132 Returns offset in CMOS bank 0 of the verified boot non-volatile
133 storage block, counting from the first writable CMOS byte
134 (that is, 'offset = 0' is the byte following the 14 bytes of
135 clock data).
136
137What: /sys/bus/platform/devices/GGL0001:*/VBNV.1
138 /sys/bus/platform/devices/GOOG0016:*/VBNV.1
139Date: May 2022
140KernelVersion: 5.19
141Description:
142 Return the size in bytes of the verified boot non-volatile
143 storage block.
144
145What: /sys/bus/platform/devices/GGL0001:*/VDAT
146 /sys/bus/platform/devices/GOOG0016:*/VDAT
147Date: May 2022
148KernelVersion: 5.19
149Description:
150 Returns the verified boot data block shared between the
151 firmware verification step and the kernel verification step
152 (hex dump).