linux-kernel - Re: [PATCH v2 0/3] Cadence PCIe PHY latency for PTM

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Date:   Tue, 30 May 2023 10:21:17 +0200
From:   Christian Gmeiner <christian.gmeiner@...il.com>
To:     Dominic Rath <rath@...-augsburg.de>
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        tjoseph@...ence.com, bhelgaas@...gle.com, lpieralisi@...nel.org,
        nm@...com, vigneshr@...com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        bahle@...-augsburg.de
Subject: Re: [PATCH v2 0/3] Cadence PCIe PHY latency for PTM

Hi Dominic

Am Do., 27. Apr. 2023 um 07:50 Uhr schrieb Dominic Rath <rath@...-augsburg.de>:
>
> Hello Everyone,
>
> this series adds PHY latency properties to the Cadence PCIe
> driver to improve PTM accuracy, and configures the necessary
> values for TI's AM64x processors.
>
> These latencies are implementation specific and need to be
> configured in the PCIe IP core's registers to allow the
> PCIe controller to exactly determine the RX/TX timestamps for
> PCIe PTM messages.
>
> TI doesn't document these values in the datasheet or reference
> manual as of now, but provided the necessary data via TI's E2E
> forums (see PATCH 3/3).
>
> Changes from v1 to v2:
>    - move latency property to PHY instead of PCIe controller
>    - drop vendor prefix from property name
>    - rephrase commit message regarding optional properties
>    - emit an info message instead of a warning in case
>      an optional property is missing
>
> Best Regards,
>

Hope you send out a v3 soon.

-- 
greets
--
Christian Gmeiner, MSc

https://christian-gmeiner.info/privacypolicy