abd4fd43f2
The current descriptions all begin with ("This file shows something")
clause, which is incorrect wording since these mean return value from
sysfs.
Use imperative mood ("Returns something") instead, in line with
corresponding ACPI documentation at firmware-guide/.
Cc: Benson Leung <bleung@google.com>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Tzung-Bi Shih <tzungbi@kernel.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc: Linux Next Mailing List <linux-next@vger.kernel.org>
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20220518083524.37380-3-bagasdotme@gmail.com
138 lines
3.9 KiB
Plaintext
138 lines
3.9 KiB
Plaintext
What: /sys/bus/platform/devices/GGL0001:*/BINF.2
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns active EC firmware of current boot (boolean).
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== ===============================
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0 Read only (recovery) firmware.
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1 Rewritable firmware.
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== ===============================
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What: /sys/bus/platform/devices/GGL0001:*/BINF.3
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns main firmware type for current boot (integer).
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== =====================================
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0 Recovery.
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1 Normal.
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2 Developer.
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3 Netboot (factory installation only).
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== =====================================
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What: /sys/bus/platform/devices/GGL0001:*/CHSW
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns switch position for Chrome OS specific hardware
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switches when the firmware is booted (integer).
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==== ===========================================
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0 No changes.
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2 Recovery button was pressed.
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4 Recovery button was pressed (EC firmware).
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32 Developer switch was enabled.
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512 Firmware write protection was disabled.
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==== ===========================================
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What: /sys/bus/platform/devices/GGL0001:*/FMAP
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns physical memory address of the start of the main
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processor firmware flashmap.
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What: /sys/bus/platform/devices/GGL0001:*/FRID
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns firmware version for the read-only portion of the
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main processor firmware.
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What: /sys/bus/platform/devices/GGL0001:*/FWID
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns firmware version for the rewritable portion of the
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main processor firmware.
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What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.0
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns type of the GPIO signal for the Chrome OS specific
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GPIO assignments (integer).
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=========== ==================================
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1 Recovery button.
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2 Developer mode switch.
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3 Firmware write protection switch.
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256 to 511 Debug header GPIO 0 to GPIO 255.
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=========== ==================================
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What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.1
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns signal attributes of the GPIO signal (integer bitfield).
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== =======================
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0 Signal is active low.
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1 Signal is active high.
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== =======================
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What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.2
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns the GPIO number on the specified GPIO
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controller.
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What: /sys/bus/platform/devices/GGL0001:*/GPIO.X/GPIO.3
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns name of the GPIO controller.
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What: /sys/bus/platform/devices/GGL0001:*/HWID
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns hardware ID for the Chromebook.
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What: /sys/bus/platform/devices/GGL0001:*/MECK
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns the SHA-1 or SHA-256 hash that is read out of the
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Management Engine extended registers during boot. The hash
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is exported via ACPI so the OS can verify that the Management
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Engine firmware has not changed. If Management Engine is not
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present, or if the firmware was unable to read the extended registers, this buffer size can be zero.
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What: /sys/bus/platform/devices/GGL0001:*/VBNV.0
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns offset in CMOS bank 0 of the verified boot non-volatile
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storage block, counting from the first writable CMOS byte
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(that is, 'offset = 0' is the byte following the 14 bytes of
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clock data).
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What: /sys/bus/platform/devices/GGL0001:*/VBNV.1
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Return the size in bytes of the verified boot non-volatile
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storage block.
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What: /sys/bus/platform/devices/GGL0001:*/VDAT
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Date: May 2022
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KernelVersion: 5.19
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Description:
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Returns the verified boot data block shared between the
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firmware verification step and the kernel verification step
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(binary).
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