What: /sys/bus/platform/devices/GGL0001:*/BINF.2 Date: May 2022 KernelVersion: 5.19 Description: This file shows information about the current boot of the active EC firmware. == =============================== 0 Read only (recovery) firmware. 1 Rewritable firmware. == =============================== What: /sys/bus/platform/devices/GGL0001:*/BINF.3 Date: May 2022 KernelVersion: 5.19 Description: This file shows information about the current boot of the active main firmware type. == ===================================== 0 Recovery. 1 Normal. 2 Developer. 3 Netboot (factory installation only). == ===================================== What: /sys/bus/platform/devices/GGL0001:*/CHSW Date: May 2022 KernelVersion: 5.19 Description: This file shows the switch position for the Chrome OS specific hardware switches when the firmware is booted. ==== =========================================== 0 No changes. 2 Recovery button was pressed. 4 Recovery button was pressed (EC firmware). 32 Developer switch was enabled. 512 Firmware write protection was disabled. ==== =========================================== What: /sys/bus/platform/devices/GGL0001:*/FMAP Date: May 2022 KernelVersion: 5.19 Description: This file shows the physical memory address of the start of the main processor firmware flashmap. What: /sys/bus/platform/devices/GGL0001:*/FRID Date: May 2022 KernelVersion: 5.19 Description: This file shows the firmware version for the read-only portion of the main processor firmware. What: /sys/bus/platform/devices/GGL0001:*/FWID Date: May 2022 KernelVersion: 5.19 Description: This file shows the firmware version for the rewritable portion of the main processor firmware. What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.0 Date: May 2022 KernelVersion: 5.19 Description: This file shows the type of the GPIO signal for the Chrome OS specific GPIO assignments. =========== ================================== 1 Recovery button. 2 Developer mode switch. 3 Firmware write protection switch. 256 to 511 Debug header GPIO 0 to GPIO 255. =========== ================================== What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.1 Date: May 2022 KernelVersion: 5.19 Description: This file shows the signal attributes of the GPIO signal. == ======================= 0 Signal is active low. 1 Signal is active high. == ======================= What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.2 Date: May 2022 KernelVersion: 5.19 Description: This file shows the GPIO number on the specified GPIO controller. What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.3 Date: May 2022 KernelVersion: 5.19 Description: This file shows the name of the GPIO controller. What: /sys/bus/platform/devices/GGL0001:*/HWID Date: May 2022 KernelVersion: 5.19 Description: This file shows the hardware ID for the Chromebook. What: /sys/bus/platform/devices/GGL0001:*/MECK Date: May 2022 KernelVersion: 5.19 Description: This binary file returns the SHA-1 or SHA-256 hash that is read out of the Management Engine extended registers during boot. The hash is exported vi ACPI so the OS can verify that the Management Engine firmware has not changed. If Management Engine is not present, or if the firmware was unable to read the extended registers, this buffer size can be zero. What: /sys/bus/platform/devices/GGL0001:*/VBNV.0 Date: May 2022 KernelVersion: 5.19 Description: This file shows the offset in CMOS bank 0 of the verified boot non-volatile storage block, counting from the first writable CMOS byte (that is, 'offset = 0' is the byte following the 14 bytes of clock data). What: /sys/bus/platform/devices/GGL0001:*/VBNV.1 Date: May 2022 KernelVersion: 5.19 Description: This file shows the size in bytes of the verified boot non-volatile storage block. What: /sys/bus/platform/devices/GGL0001:*/VDAT Date: May 2022 KernelVersion: 5.19 Description: This binary file returns the verified boot data block shared between the firmware verification step and the kernel verification step.