Commit 56a1c778 authored by Min Li's avatar Min Li Committed by David S. Miller
Browse files

docs: ptp.rst: add support for Renesas (IDT) ClockMatrix 



Add below to “Ancillary clock features” section
  - Low Pass Filter (LPF) access from user space

Add below to list of “Supported hardware” section
  + Renesas (IDT) ClockMatrix™

Signed-off-by: default avatarMin Li <min.li.xe@renesas.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 473309fb

Documentation/driver-api/ptp.rst

+12 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ PTP hardware clock infrastructure for Linux 
  + Ancillary clock features

    - Time stamp external events

    - Period output signals configurable from user space

    - Low Pass Filter (LPF) access from user space

    - Synchronization of the Linux system time via the PPS subsystem



PTP hardware clock kernel API
@@ -94,3 +95,14 @@ Supported hardware 


     - Auxiliary Slave/Master Mode Snapshot (optional interrupt)

     - Target Time (optional interrupt)



   * Renesas (IDT) ClockMatrix™



     - Up to 4 independent PHC channels

     - Integrated low pass filter (LPF), access via .adjPhase (compliant to ITU-T G.8273.2)

     - Programmable output periodic signals

     - Programmable inputs can time stamp external triggers

     - Driver and/or hardware configuration through firmware (idtcm.bin)

          - 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)

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