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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).
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