diff options
| author | Barnabás Pőcze <pobrn@protonmail.com> | 2021-02-03 21:57:13 +0000 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2021-02-04 10:21:43 +0100 |
| commit | 6b49dea4fd9c539f5fea61f6a203ec1349292a26 (patch) | |
| tree | 66adafd36fe512a52e2e7b3a44cbfcde326f1269 /Documentation/ABI/testing | |
| parent | 503325f84bc0ee3a07b0831ee59d6eae84cfa695 (diff) | |
platform/x86: ideapad-laptop: add "always on USB charging" control support
Certain models have a so-called "always on USB charging" feature,
which enables USB charging even when the computer is turned off
or suspended, and which may be controlled/queried using the
SALS/HALS ACPI methods. Expose this functionality via a new device
attribute (usb_charging). Tested on: Lenovo YOGA 520-14IKB 80X8
Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Link: https://lore.kernel.org/r/20210203215403.290792-28-pobrn@protonmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'Documentation/ABI/testing')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-platform-ideapad-laptop | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-platform-ideapad-laptop b/Documentation/ABI/testing/sysfs-platform-ideapad-laptop index fd2ac02bc5bd..b17688d73922 100644 --- a/Documentation/ABI/testing/sysfs-platform-ideapad-laptop +++ b/Documentation/ABI/testing/sysfs-platform-ideapad-laptop @@ -41,3 +41,12 @@ Description: # echo "0" > \ /sys/bus/pci/devices/0000:00:1f.0/PNP0C09:00/VPC2004:00/fn_lock + +What: /sys/bus/platform/devices/VPC2004:*/usb_charging +Date: Feb 2021 +KernelVersion: 5.12 +Contact: platform-driver-x86@vger.kernel.org +Description: + Controls whether the "always on USB charging" feature is + enabled or not. This feature enables charging USB devices + even if the computer is not turned on. |