linux-kernel - Re: [PATCH v1 1/1] gpio: mockup: Adjust documentation to the code

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Date:   Mon, 15 Mar 2021 19:06:01 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Bartosz Golaszewski <bgolaszewski@...libre.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Documentation List <linux-doc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Jonathan Corbet <corbet@....net>
Subject: Re: [PATCH v1 1/1] gpio: mockup: Adjust documentation to the code

On Mon, Mar 15, 2021 at 7:01 PM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> First of all one of the parameter missed 'mockup' in its name,
> Second, the semantics of the integer pairs depends on the sign
> of the base (the first value in the pair).

>          This parameter takes an argument in the form of an array of integer
> -        pairs. Each pair defines the base GPIO number (if any) and the number
> -        of lines exposed by the chip. If the base GPIO is -1, the gpiolib
> -        will assign it automatically.
> +        pairs. Each pair defines the base GPIO number (non-negative integer)
> +        and the first number after the last of this chip. If the base GPIO
> +        is -1, the gpiolib will assign it automatically. while the following
> +        parameter is the number of lines exposed by the chip.
>
> -        Example: gpio_mockup_ranges=-1,8,-1,16,405,4
> +        Example: gpio_mockup_ranges=-1,8,-1,16,405,409

Just a side note: it was always like this (I've checked the initial
gpio-mockup.c code). I think you have to add more test cases.

-- 
With Best Regards,
Andy Shevchenko