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authorAdam Thomson <Adam.Thomson.Opensource@diasemi.com>2018-04-23 17:10:59 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-04-25 15:17:48 +0300
commitcf45004195efea6b479a1d710d6fc21c2b19353e (patch)
tree55484c6c006204f0dd258a21b3bdb27599b5f022 /Documentation/ABI
parent1ac3eef74a61f40639d0fa835fd968f825b09135 (diff)
downloadlinux-cf45004195efea6b479a1d710d6fc21c2b19353e.tar.xz
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/ABI')
-rw-r--r--Documentation/ABI/testing/sysfs-class-power12
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