linux-kernel - Re: [PATCH v5 1/1] gpio: add sloppy logic analyzer using polling

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Message-ID: <CAMRc=McG6fn_VX7+OPXUWjX1tYozQPg1eyEz-3fJMx35DiXimg@mail.gmail.com>
Date:   Wed, 24 Nov 2021 12:47:32 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc:     "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-doc <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v5 1/1] gpio: add sloppy logic analyzer using polling

On Tue, Nov 23, 2021 at 5:49 PM Wolfram Sang
<wsa+renesas@...g-engineering.com> wrote:
>
> This is a sloppy logic analyzer using GPIOs. It comes with a script to
> isolate a CPU for polling. While this is definitely not a production
> level analyzer, it can be a helpful first view when remote debugging.
> Read the documentation for details.
>
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>

Hi Wolfram!

I'm seeing you're using debugfs for this module (both for
configuration as well as control). How about using configfs + sysfs?
I'd argue that debugfs isn't really the right interface for a useful
tool that is this LA.

Bart