linux-kernel - [PATCH 1/3] [PATCH 1/3] dt-bindings: connector: Add self-powered property

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20180928234703.15970-1-badhri@google.com>
Date:   Fri, 28 Sep 2018 16:47:01 -0700
From:   Badhri Jagan Sridharan <badhri@...gle.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Andrzej Hajda <a.hajda@...sung.com>, Li Jun <jun.li@....com>,
        linux@...ck-us.net
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org,
        Badhri Jagan Sridharan <badhri@...gle.com>
Subject: [PATCH 1/3] [PATCH 1/3] dt-bindings: connector: Add self-powered property

>From USB_PD_R3_0
7.1.5 Response to Hard Resets
Device operation during and after a Hard Reset is defined as follows:
Self-powered devices Should Not disconnect from USB during a Hard Reset
(see Section 9.1.2).
Bus powered devices will disconnect from USB during a Hard Reset due to the
loss of their power source.

Therefore it is necessary to know whether the port belongs to
a device which is self powered or bus powered. This change
adds "self-powered" flag to the connector class which present indicates
that the port belongs to a device that is self powered. Else it is
bus powered usb device.

Signed-off-by: Badhri Jagan Sridharan <badhri@...gle.com>
---
 Documentation/devicetree/bindings/connector/usb-connector.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/connector/usb-connector.txt b/Documentation/devicetree/bindings/connector/usb-connector.txt
index 8855bfcfd7785..8f7a36ae29bf7 100644
--- a/Documentation/devicetree/bindings/connector/usb-connector.txt
+++ b/Documentation/devicetree/bindings/connector/usb-connector.txt
@@ -14,6 +14,8 @@ Optional properties:
 - label: symbolic name for the connector,
 - type: size of the connector, should be specified in case of USB-A, USB-B
   non-fullsize connectors: "mini", "micro".
+- self-powered: Set this property if the usb device that has its own power
+  source.
 
 Optional properties for usb-c-connector:
 - power-role: should be one of "source", "sink" or "dual"(DRP) if typec
-- 
2.19.0.605.g01d371f741-goog