linux-kernel - Re: [RFC 02/11] drivers: Add HTE subsystem

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Message-ID: <306ce8c3-8919-f2aa-5fbd-7ac9381e70c2@infradead.org>
Date:   Sun, 27 Jun 2021 10:40:39 -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 02/11] drivers: Add HTE subsystem

On 6/25/21 4:55 PM, Dipen Patel wrote:
> diff --git a/drivers/hte/Kconfig b/drivers/hte/Kconfig
> new file mode 100644
> index 000000000000..394e112f7dfb
> --- /dev/null
> +++ b/drivers/hte/Kconfig
> @@ -0,0 +1,22 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +menuconfig HTE
> +        bool "Hardware Timestamping Engine (HTE) Support"
> +        help
> +          Hardware Timestamping Engine (HTE) Support.
> +
> +          Some devices provide hardware timestamping engine which can timestamp
> +	  certain device lines/signals in realtime. This way to provide
> +	  hardware assisted timestamp to generic signals like GPIOs, IRQs lines
> +	  comes with benefit for the applications like autonomous machines
> +	  needing accurate timestamping event with less jitter.
> +
> +	  This framework provides a generic interface to such HTE devices
> +          within the Linux kernel. It provides an API to register and
> +	  unregister a HTE provider chip, configurable sw buffer to
> +	  store the timestamps, push the timestamp from the HTE providers and
> +	  retrieve timestamps for the consumers. It also provides means for the
> +	  consumers to request signals it wishes to hardware timestamp and
> +	  release them if not required.
> +
> +          If unsure, say no.

semi-bot:

Please follow coding-style for Kconfig files:

(from Documentation/process/coding-style.rst, section 10):

For all of the Kconfig* configuration files throughout the source tree,
the indentation is somewhat different.  Lines under a ``config`` definition
are indented with one tab, while help text is indented an additional two
spaces.


thanks.
-- 
~Randy