linux-kernel - Re: [RFC v2 03/11] hte: Add tegra194 HTE kernel provider

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Message-ID: <c16a75ee-b0db-5433-1902-762d29bd854c@infradead.org>
Date:   Fri, 1 Oct 2021 16:44:05 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Dipen Patel <dipenp@...dia.com>, thierry.reding@...il.com,
        jonathanh@...dia.com, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-gpio@...r.kernel.org,
        linus.walleij@...aro.org, bgolaszewski@...libre.com,
        warthog618@...il.com, devicetree@...r.kernel.org,
        linux-doc@...r.kernel.org, robh+dt@...nel.org
Subject: Re: [RFC v2 03/11] hte: Add tegra194 HTE kernel provider

On 9/30/21 4:26 PM, Dipen Patel wrote:
> +-----------
> +The Nvidia tegra194 HTE provider driver implements two GTE
> +(Generic Timestamping Engine) instances 1) GPIO GTE and 2) LIC IRQ GTE. The
> +both GTEs instances get the timestamp from the system counter TSC which has
> +31.25MHz clock rate, and the driver converts clock tick rate to nano seconds
> +before storing it as timestamp value.
> +
> +GPIO GTE
> +--------
> +
> +This GTE instance timestamps GPIO in real time, for that to happen GPIO
> +needs to be configured as input and IRQ needs to ba enabled. The only always on
> +(AON) gpio controller instance supports timestamping GPIOs in realtime and it

Here we have text that tells what AON means, but in the first paragraph above,
there is nothing that tells us what LIC means. Please add that.

-- 
~Randy