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

General informations

The Linux kernel configuration item CONFIG_ACPI_EC_DEBUGFS:

• prompt: EC read/write access through /sys/kernel/debug/ec
• type: tristate
• depends on: (none)
• defined in drivers/acpi/Kconfig
• found in Linux kernels: 2.6.36–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12
• modules built: ec_sys

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.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module ec_sys CONFIG_ACPI_EC_DEBUGFS : drivers/acpi/Kconfig : "EC read/write access through /sys/kernel/debug/ec" # in 2.6.36–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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