linux-kernel - Re: [PATCH 12/14] usb: typec: tcpm: Implement enabling Auto Discharge disconnect support

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Date:   Fri, 28 Aug 2020 17:13:11 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Badhri Jagan Sridharan <badhri@...gle.com>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 12/14] usb: typec: tcpm: Implement enabling Auto
 Discharge disconnect support

On Mon, Aug 24, 2020 at 09:22:08PM -0700, Badhri Jagan Sridharan wrote:
> TCPCI spec allows TCPC hardware to autonomously discharge the vbus
> capacitance upon disconnect. The expectation is that the TCPM enables
> AutoDischargeDisconnect while entering SNK/SRC_ATTACHED states. Hardware
> then automously discharges vbus when the vbus falls below a certain
> threshold i.e. VBUS_SINK_DISCONNECT_THRESHOLD.
> 
> Apart from enabling the vbus discharge circuit, AutoDischargeDisconnect
> is also used a flag to move TCPCI based TCPC implementations into
> Attached.Snk/Attached.Src state as mentioned in
> Figure 4-15. TCPC State Diagram before a Connection of the
> USB Type-C Port Controller Interface Specification.
> In such TCPC implementations, setting AutoDischargeDisconnect would
> prevent TCPC into entering "Connection_Invalid" state as well.
> 
> Signed-off-by: Badhri Jagan Sridharan <badhri@...gle.com>
> Change-Id: I09c407eb228d69eb1259008eeb14c429b0fda765

It looks like this patch is also formated a bit differently compared
to the others.

thanks,

-- 
heikki