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| author | Adam Thomson <Adam.Thomson.Opensource@diasemi.com> | 2018-04-23 15:10:59 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-25 14:17:48 +0200 |
| commit | cf45004195efea6b479a1d710d6fc21c2b19353e (patch) | |
| tree | 55484c6c006204f0dd258a21b3bdb27599b5f022 /Documentation | |
| parent | 1ac3eef74a61f40639d0fa835fd968f825b09135 (diff) | |
power: supply: Add 'usb_type' property and supporting code
This commit adds the 'usb_type' property to represent USB supplies
which can report a number of different types based on a connection
event.
Examples of this already exist in drivers whereby the existing 'type'
property is updated, based on an event, to represent what was
connected (e.g. USB, USB_DCP, USB_ACA, ...). Current implementations
however don't show all supported connectable types, so this knowledge
has to be exlicitly known for each driver that supports this.
The 'usb_type' property is intended to fill this void and show users
all possible USB types supported by a driver. The property, when read,
shows all available types for the driver, and the one currently chosen
is highlighted/bracketed. It is expected that the 'type' property
would then just show the top-level type 'USB', and this would be
static.
Currently the 'usb_type' enum contains all of the USB variant types
that exist for the 'type' enum at this time, and in addition has
SDP and PPS types. The mirroring is intentional so as to not impact
existing usage of the 'type' property.
Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-power | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power index e046566e38cb..5e23e22dce1b 100644 --- a/Documentation/ABI/testing/sysfs-class-power +++ b/Documentation/ABI/testing/sysfs-class-power @@ -409,6 +409,18 @@ Description: Access: Read Valid values: Represented in 1/10 Degrees Celsius +What: /sys/class/power_supply/<supply_name>/usb_type +Date: March 2018 +Contact: linux-pm@vger.kernel.org +Description: + Reports what type of USB connection is currently active for + the supply, for example it can show if USB-PD capable source + is attached. + + Access: Read-Only + Valid values: "Unknown", "SDP", "DCP", "CDP", "ACA", "C", "PD", + "PD_DRP", "PD_PPS", "BrickID" + What: /sys/class/power_supply/<supply_name>/voltage_max Date: January 2008 Contact: linux-pm@vger.kernel.org |