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1What: /sys/bus/platform/devices/GGL0001:*/BINF.22 /sys/bus/platform/devices/GOOG0016:*/BINF.23Date: May 20224KernelVersion: 5.195Description: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.314 /sys/bus/platform/devices/GOOG0016:*/BINF.315Date: May 202216KernelVersion: 5.1917Description: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:*/CHSW28 /sys/bus/platform/devices/GOOG0016:*/CHSW29Date: May 202230KernelVersion: 5.1931Description:32 Returns switch position for Chrome OS specific hardware33 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:*/FMAP44 /sys/bus/platform/devices/GOOG0016:*/FMAP45Date: May 202246KernelVersion: 5.1947Description:48 Returns physical memory address of the start of the main49 processor firmware flashmap.50 51What: /sys/bus/platform/devices/GGL0001:*/FRID52 /sys/bus/platform/devices/GOOG0016:*/FRID53Date: May 202254KernelVersion: 5.1955Description:56 Returns firmware version for the read-only portion of the57 main processor firmware.58 59What: /sys/bus/platform/devices/GGL0001:*/FWID60 /sys/bus/platform/devices/GOOG0016:*/FWID61Date: May 202262KernelVersion: 5.1963Description:64 Returns firmware version for the rewritable portion of the65 main processor firmware.66 67What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.068 /sys/bus/platform/devices/GOOG0016:*/GPIO.X/GPIO.069Date: May 202270KernelVersion: 5.1971Description:72 Returns type of the GPIO signal for the Chrome OS specific73 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.183 /sys/bus/platform/devices/GOOG0016:*/GPIO.X/GPIO.184Date: May 202285KernelVersion: 5.1986Description: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.295 /sys/bus/platform/devices/GOOG0016:*/GPIO.X/GPIO.296Date: May 202297KernelVersion: 5.1998Description:99 Returns the GPIO number on the specified GPIO100 controller.101 102What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.3103 /sys/bus/platform/devices/GOOG0016:*/GPIO.X/GPIO.3104Date: May 2022105KernelVersion: 5.19106Description:107 Returns name of the GPIO controller.108 109What: /sys/bus/platform/devices/GGL0001:*/HWID110 /sys/bus/platform/devices/GOOG0016:*/HWID111Date: May 2022112KernelVersion: 5.19113Description:114 Returns hardware ID for the Chromebook.115 116What: /sys/bus/platform/devices/GGL0001:*/MECK117 /sys/bus/platform/devices/GOOG0016:*/MECK118Date: May 2022119KernelVersion: 5.19120Description:121 Returns the SHA-1 or SHA-256 hash that is read out of the122 Management Engine extended registers during boot. The hash123 is exported via ACPI so the OS can verify that the Management124 Engine firmware has not changed. If Management Engine is not125 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.0128 /sys/bus/platform/devices/GOOG0016:*/VBNV.0129Date: May 2022130KernelVersion: 5.19131Description:132 Returns offset in CMOS bank 0 of the verified boot non-volatile133 storage block, counting from the first writable CMOS byte134 (that is, 'offset = 0' is the byte following the 14 bytes of135 clock data).136 137What: /sys/bus/platform/devices/GGL0001:*/VBNV.1138 /sys/bus/platform/devices/GOOG0016:*/VBNV.1139Date: May 2022140KernelVersion: 5.19141Description:142 Return the size in bytes of the verified boot non-volatile143 storage block.144 145What: /sys/bus/platform/devices/GGL0001:*/VDAT146 /sys/bus/platform/devices/GOOG0016:*/VDAT147Date: May 2022148KernelVersion: 5.19149Description:150 Returns the verified boot data block shared between the151 firmware verification step and the kernel verification step152 (hex dump).153