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

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Date:   Tue, 30 Nov 2021 11:37:56 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
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>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v5 1/1] gpio: add sloppy logic analyzer using polling

Hi Wolfram,

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>

> --- a/drivers/gpio/Makefile
> +++ b/drivers/gpio/Makefile
> @@ -74,6 +74,7 @@ obj-$(CONFIG_GPIO_IT87)                       += gpio-it87.o
>  obj-$(CONFIG_GPIO_IXP4XX)              += gpio-ixp4xx.o
>  obj-$(CONFIG_GPIO_JANZ_TTL)            += gpio-janz-ttl.o
>  obj-$(CONFIG_GPIO_KEMPLD)              += gpio-kempld.o
> +obj-$(CONFIG_GPIO_SLOPPY_LOGIC_ANALYZER) += gpio-sloppy-logic-analyzer.o
>  obj-$(CONFIG_GPIO_LOGICVC)             += gpio-logicvc.o
>  obj-$(CONFIG_GPIO_LOONGSON1)           += gpio-loongson1.o
>  obj-$(CONFIG_GPIO_LOONGSON)            += gpio-loongson.o

(noticed while resolving a merge conflict with the out-of-tree
 gpio-litex)

Please preserve sort order, cfr. the (hilarious?) comment at the top
of the list:

    # Device drivers. Generally keep list sorted alphabetically
    obj-$(CONFIG_GPIO_REGMAP)       += gpio-regmap.o
    obj-$(CONFIG_GPIO_GENERIC)      += gpio-generic.o

    # directly supported by gpio-generic

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds