Commit fe3834cd authored by Rahul Rameshbabu's avatar Rahul Rameshbabu Committed by David S. Miller
Browse files

docs: ptp.rst: Add information about NVIDIA Mellanox devices 



The mlx5_core driver has implemented ptp clock driver functionality but
lacked documentation about the PTP devices. This patch adds information
about the Mellanox device family.

Signed-off-by: default avatarRahul Rameshbabu <rrameshbabu@nvidia.com>
Acked-by: default avatarRichard Cochran <richardcochran@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a05d070a

Documentation/driver-api/ptp.rst

+13 −0
Original line number Diff line number Diff line
@@ -122,3 +122,16 @@ Supported hardware 
          - LPF settings (bandwidth, phase limiting, automatic holdover, physical layer assist (per ITU-T G.8273.2))

          - Programmable output PTP clocks, any frequency up to 1GHz (to other PHY/MAC time stampers, refclk to ASSPs/SoCs/FPGAs)

          - Lock to GNSS input, automatic switching between GNSS and user-space PHC control (optional)



   * NVIDIA Mellanox



     - GPIO

          - Certain variants of ConnectX-6 Dx and later products support one

            GPIO which can time stamp external triggers and one GPIO to produce

            periodic signals.

          - Certain variants of ConnectX-5 and older products support one GPIO,

            configured to either time stamp external triggers or produce

            periodic signals.

     - PHC instances

          - All ConnectX devices have a free-running counter

          - ConnectX-6 Dx and later devices have a UTC format counter