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Diffstat (limited to 'Documentation/admin-guide/laptops/thinkpad-acpi.rst')
| -rw-r--r-- | Documentation/admin-guide/laptops/thinkpad-acpi.rst | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/admin-guide/laptops/thinkpad-acpi.rst b/Documentation/admin-guide/laptops/thinkpad-acpi.rst index 822907dcc845..fb0d346bf31a 100644 --- a/Documentation/admin-guide/laptops/thinkpad-acpi.rst +++ b/Documentation/admin-guide/laptops/thinkpad-acpi.rst @@ -50,6 +50,7 @@ detailed description): - WAN enable and disable - UWB enable and disable - LCD Shadow (PrivacyGuard) enable and disable + - Lap mode sensor A compatibility table by model and feature is maintained on the web site, http://ibm-acpi.sf.net/. I appreciate any success or failure @@ -1432,6 +1433,20 @@ The first command ensures the best viewing angle and the latter one turns on the feature, restricting the viewing angles. +DYTC Lapmode sensor +------------------ + +sysfs: dytc_lapmode + +Newer thinkpads and mobile workstations have the ability to determine if +the device is in deskmode or lapmode. This feature is used by user space +to decide if WWAN transmission can be increased to maximum power and is +also useful for understanding the different thermal modes available as +they differ between desk and lap mode. + +The property is read-only. If the platform doesn't have support the sysfs +class is not created. + EXPERIMENTAL: UWB ----------------- @@ -1470,6 +1485,23 @@ For more details about which buttons will appear depending on the mode, please review the laptop's user guide: http://www.lenovo.com/shop/americas/content/user_guides/x1carbon_2_ug_en.pdf +Battery charge control +---------------------- + +sysfs attributes: +/sys/class/power_supply/BAT*/charge_control_{start,end}_threshold + +These two attributes are created for those batteries that are supported by the +driver. They enable the user to control the battery charge thresholds of the +given battery. Both values may be read and set. `charge_control_start_threshold` +accepts an integer between 0 and 99 (inclusive); this value represents a battery +percentage level, below which charging will begin. `charge_control_end_threshold` +accepts an integer between 1 and 100 (inclusive); this value represents a battery +percentage level, above which charging will stop. + +The exact semantics of the attributes may be found in +Documentation/ABI/testing/sysfs-class-power. + Multiple Commands, Module Parameters ------------------------------------ |