linux-kernel - Re: [PATCH net-next 0/5] Add PPS support to am65-cpts driver

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Date:   Fri, 13 Jan 2023 11:48:53 +0200
From:   Roger Quadros <rogerq@...nel.org>
To:     Siddharth Vadapalli <s-vadapalli@...com>, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        robh+dt@...nel.org, krzysztof.kozlowski@...aro.org,
        krzysztof.kozlowski+dt@...aro.org, nm@...com, kristo@...nel.org,
        vigneshr@...com, nsekhar@...com
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        srk@...com
Subject: Re: [PATCH net-next 0/5] Add PPS support to am65-cpts driver

Siddharth,

On 11/01/2023 13:44, Siddharth Vadapalli wrote:
> The CPTS hardware doesn't support PPS signal generation. Using the GenFx
> (periodic signal generator) function, it is possible to model a PPS signal
> followed by routing it via the time sync router to the CPTS_HWy_TS_PUSH
> (hardware time stamp) input, in order to generate timestamps at 1 second
> intervals.
> 
> This series adds driver support for enabling PPS signal generation.
> Additionally, the documentation for the am65-cpts driver is updated with
> the bindings for the "ti,pps" property, which is used to inform the
> pair [CPTS_HWy_TS_PUSH, GenFx] to the cpts driver. The PPS example is
> enabled for AM625-SK board by default, by adding the timesync_router node
> to the AM62x SoC, and configuring it for PPS in the AM625-SK board dts.
> 
> Grygorii Strashko (3):
>   dt-binding: net: ti: am65x-cpts: add 'ti,pps' property
>   net: ethernet: ti: am65-cpts: add pps support
>   net: ethernet: ti: am65-cpts: adjust pps following ptp changes
> 
> Siddharth Vadapalli (2):
>   arm64: dts: ti: k3-am62-main: Add timesync router node
>   arm64: dts: ti: k3-am625-sk: Add cpsw3g cpts PPS support

Device tree patches need to be sent separately. You don't need to involve
net maintainers for that.

If you introduce a new binding then that needs to be in maintainer's
tree before you can send a related device tree patch.

> 
>  .../bindings/net/ti,k3-am654-cpts.yaml        |   8 +
>  arch/arm64/boot/dts/ti/k3-am62-main.dtsi      |   9 ++
>  arch/arm64/boot/dts/ti/k3-am625-sk.dts        |  20 +++
>  drivers/net/ethernet/ti/am65-cpts.c           | 144 ++++++++++++++++--
>  4 files changed, 166 insertions(+), 15 deletions(-)
> 

cheers,
-roger