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+What: /sys/bus/platform/devices/GGL0001:*/BINF.2
+Date: May 2022
+KernelVersion: 5.19
+Description:
+ Returns active EC firmware of current boot (boolean).
+
+ == ===============================
+ 0 Read only (recovery) firmware.
+ 1 Rewritable firmware.
+ == ===============================
+
+What: /sys/bus/platform/devices/GGL0001:*/BINF.3
+Date: May 2022
+KernelVersion: 5.19
+Description:
+ Returns main firmware type for current boot (integer).
+
+ == =====================================
+ 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:
+ Returns switch position for Chrome OS specific hardware
+ switches when the firmware is booted (integer).
+
+ ==== ===========================================
+ 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:
+ Returns 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:
+ Returns 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:
+ Returns 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:
+ Returns type of the GPIO signal for the Chrome OS specific
+ GPIO assignments (integer).
+
+ =========== ==================================
+ 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:
+ Returns signal attributes of the GPIO signal (integer bitfield).
+
+ == =======================
+ 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:
+ Returns 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:
+ Returns name of the GPIO controller.
+
+What: /sys/bus/platform/devices/GGL0001:*/HWID
+Date: May 2022
+KernelVersion: 5.19
+Description:
+ Returns hardware ID for the Chromebook.
+
+What: /sys/bus/platform/devices/GGL0001:*/MECK
+Date: May 2022
+KernelVersion: 5.19
+Description:
+ Returns the SHA-1 or SHA-256 hash that is read out of the
+ Management Engine extended registers during boot. The hash
+ is exported via 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:
+ Returns 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:
+ Return 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:
+ Returns the verified boot data block shared between the
+ firmware verification step and the kernel verification step
+ (hex dump).