1 What: /sys/bus/platform/devices/GGL0001:*/BINF.2 2 /sys/bus/platform/devices/GOOG0016:*/BINF.2 3 Date: May 2022 4 KernelVersion: 5.19 5 Description: 6 Returns active EC firmware of current boot (boolean). 7 8 == =============================== 9 0 Read only (recovery) firmware. 10 1 Rewritable firmware. 11 == =============================== 12 13 What: /sys/bus/platform/devices/GGL0001:*/BINF.3 14 /sys/bus/platform/devices/GOOG0016:*/BINF.3 15 Date: May 2022 16 KernelVersion: 5.19 17 Description: 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 27 What: /sys/bus/platform/devices/GGL0001:*/CHSW 28 /sys/bus/platform/devices/GOOG0016:*/CHSW 29 Date: May 2022 30 KernelVersion: 5.19 31 Description: 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 43 What: /sys/bus/platform/devices/GGL0001:*/FMAP 44 /sys/bus/platform/devices/GOOG0016:*/FMAP 45 Date: May 2022 46 KernelVersion: 5.19 47 Description: 48 Returns physical memory address of the start of the main 49 processor firmware flashmap. 50 51 What: /sys/bus/platform/devices/GGL0001:*/FRID 52 /sys/bus/platform/devices/GOOG0016:*/FRID 53 Date: May 2022 54 KernelVersion: 5.19 55 Description: 56 Returns firmware version for the read-only portion of the 57 main processor firmware. 58 59 What: /sys/bus/platform/devices/GGL0001:*/FWID 60 /sys/bus/platform/devices/GOOG0016:*/FWID 61 Date: May 2022 62 KernelVersion: 5.19 63 Description: 64 Returns firmware version for the rewritable portion of the 65 main processor firmware. 66 67 What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.0 68 /sys/bus/platform/devices/GOOG0016:*/GPIO.X/GPIO.0 69 Date: May 2022 70 KernelVersion: 5.19 71 Description: 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 82 What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.1 83 /sys/bus/platform/devices/GOOG0016:*/GPIO.X/GPIO.1 84 Date: May 2022 85 KernelVersion: 5.19 86 Description: 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 94 What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.2 95 /sys/bus/platform/devices/GOOG0016:*/GPIO.X/GPIO.2 96 Date: May 2022 97 KernelVersion: 5.19 98 Description: 99 Returns the GPIO number on the specified GPIO 100 controller. 101 102 What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.3 103 /sys/bus/platform/devices/GOOG0016:*/GPIO.X/GPIO.3 104 Date: May 2022 105 KernelVersion: 5.19 106 Description: 107 Returns name of the GPIO controller. 108 109 What: /sys/bus/platform/devices/GGL0001:*/HWID 110 /sys/bus/platform/devices/GOOG0016:*/HWID 111 Date: May 2022 112 KernelVersion: 5.19 113 Description: 114 Returns hardware ID for the Chromebook. 115 116 What: /sys/bus/platform/devices/GGL0001:*/MECK 117 /sys/bus/platform/devices/GOOG0016:*/MECK 118 Date: May 2022 119 KernelVersion: 5.19 120 Description: 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. 126 127 What: /sys/bus/platform/devices/GGL0001:*/VBNV.0 128 /sys/bus/platform/devices/GOOG0016:*/VBNV.0 129 Date: May 2022 130 KernelVersion: 5.19 131 Description: 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). 136 137 What: /sys/bus/platform/devices/GGL0001:*/VBNV.1 138 /sys/bus/platform/devices/GOOG0016:*/VBNV.1 139 Date: May 2022 140 KernelVersion: 5.19 141 Description: 142 Return the size in bytes of the verified boot non-volatile 143 storage block. 144 145 What: /sys/bus/platform/devices/GGL0001:*/VDAT 146 /sys/bus/platform/devices/GOOG0016:*/VDAT 147 Date: May 2022 148 KernelVersion: 5.19 149 Description: 150 Returns the verified boot data block shared between the 151 firmware verification step and the kernel verification step 152 (hex dump).
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