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CONFIG_ACPI_EC_DEBUGFS: EC read/write access through /sys/kernel/debug/ec

General informations

The Linux kernel configuration item CONFIG_ACPI_EC_DEBUGFS:

Help text

Say N to disable Embedded Controller /sys/kernel/debug interface

Be aware that using this interface can confuse your Embedded Controller in a way that a normal reboot is not enough. You then have to power off your system, and remove the laptop battery for some seconds. An Embedded Controller typically is available on laptops and reads sensor values like battery state and temperature. The kernel accesses the EC through ACPI parsed code provided by BIOS tables. This option allows to access the EC directly without ACPI code being involved. Thus this option is a debug option that helps to write ACPI drivers and can be used to identify ACPI code or EC firmware bugs.



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