diff options
| author | Badhri Jagan Sridharan <badhri@google.com> | 2020-10-29 09:31:35 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-18 14:57:49 +0300 |
| commit | f321a02caebdd0c56e167610cda2fa148cd96e8b (patch) | |
| tree | 767b926ec993ea0ae3f449e43a2ef4593d594697 /include/linux/errseq.h | |
| parent | 2fc58b36e919902ae2f17531783d8debadcc2a27 (diff) | |
| download | linux-f321a02caebdd0c56e167610cda2fa148cd96e8b.tar.xz | |
usb: typec: tcpm: Implement enabling Auto Discharge disconnect support
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@google.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20201029063138.1429760-8-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/errseq.h')
0 files changed, 0 insertions, 0 deletions