From: Roger Quadros <rogerq@kernel.org>
To: Siddharth Vadapalli <s-vadapalli@ti.com>,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, robh+dt@kernel.org,
krzysztof.kozlowski@linaro.org,
krzysztof.kozlowski+dt@linaro.org, vigneshr@ti.com,
nsekhar@ti.com
Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, srk@ti.com
Subject: Re: [PATCH net-next v2 2/3] net: ethernet: ti: am65-cpts: add pps support
Date: Mon, 16 Jan 2023 18:09:05 +0200 [thread overview]
Message-ID: <0fdd9e9b-c6ac-b5c3-adb5-01a764a7b8f6@kernel.org> (raw)
In-Reply-To: <20230116085534.440820-3-s-vadapalli@ti.com>
On 16/01/2023 10:55, Siddharth Vadapalli wrote:
> From: Grygorii Strashko <grygorii.strashko@ti.com>
>
> CPTS doesn't have HW support for PPS ("pulse per second”) signal
> generation, but it can be modeled by using Time Sync Router and routing
> GenFx (periodic signal generator) output to CPTS_HWy_TS_PUSH (hardware time
> stamp) input, and configuring GenFx to generate 1sec pulses.
>
> +------------------------+
> | CPTS |
> | |
> +--->CPTS_HW4_PUSH GENFx+---+
> | | | |
> | +------------------------+ |
> | |
> +--------------------------------+
>
> Add corresponding support to am65-cpts driver. The DT property "ti,pps"
> has to be used to enable PPS support and configure pair
> [CPTS_HWy_TS_PUSH, GenFx].
>
> Once enabled, PPS can be tested using ppstest tool:
> # ./ppstest /dev/pps0
>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
> Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
next prev parent reply other threads:[~2023-01-16 16:15 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-16 8:55 [PATCH net-next v2 0/3] Add PPS support to am65-cpts driver Siddharth Vadapalli
2023-01-16 8:55 ` [PATCH net-next v2 1/3] dt-binding: net: ti: am65x-cpts: add 'ti,pps' property Siddharth Vadapalli
2023-01-16 8:55 ` [PATCH net-next v2 2/3] net: ethernet: ti: am65-cpts: add pps support Siddharth Vadapalli
2023-01-16 16:09 ` Roger Quadros [this message]
2023-01-16 8:55 ` [PATCH net-next v2 3/3] net: ethernet: ti: am65-cpts: adjust pps following ptp changes Siddharth Vadapalli
2023-01-16 16:09 ` Roger Quadros
2023-01-18 13:10 ` [PATCH net-next v2 0/3] Add PPS support to am65-cpts driver patchwork-bot+netdevbpf
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