linux-kernel - Re: [PATCH v4 04/11] watchdog: add support for sl28cpld watchdog

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Message-ID: <20200605150542.GA254229@roeck-us.net>
Date:   Fri, 5 Jun 2020 08:05:42 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Michael Walle <michael@...le.cc>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-hwmon@...r.kernel.org, linux-pwm@...r.kernel.org,
        linux-watchdog@...r.kernel.org,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Jean Delvare <jdelvare@...e.com>,
        Lee Jones <lee.jones@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Shawn Guo <shawnguo@...nel.org>, Li Yang <leoyang.li@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>, Mark Brown <broonie@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v4 04/11] watchdog: add support for sl28cpld watchdog

On Fri, Jun 05, 2020 at 05:09:11PM +0300, Andy Shevchenko wrote:
> On Fri, Jun 05, 2020 at 06:52:00AM -0700, Guenter Roeck wrote:
> > On 6/5/20 3:50 AM, Andy Shevchenko wrote:
> > > On Fri, Jun 5, 2020 at 1:24 PM Michael Walle <michael@...le.cc> wrote:
> > >> Am 2020-06-05 10:14, schrieb Andy Shevchenko:
> > >>> On Fri, Jun 5, 2020 at 12:14 AM Michael Walle <michael@...le.cc> wrote:
> 
> ...
> 
> > >>>> +static bool nowayout = WATCHDOG_NOWAYOUT;
> > >>>> +module_param(nowayout, bool, 0);
> > >>>> +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started
> > >>>> (default="
> > >>>> +                               __MODULE_STRING(WATCHDOG_NOWAYOUT)
> > >>>> ")");
> > >>>> +
> > >>>> +static int timeout;
> > >>>> +module_param(timeout, int, 0);
> > >>>> +MODULE_PARM_DESC(timeout, "Initial watchdog timeout in seconds");
> > >>>
> > >>> Guenter ACKed this, but I'm wondering why we still need module
> > >>> parameters...
> > >>
> > >> How would a user change the nowayout or the timeout? For the latter
> > >> there is
> > >> a device tree entry, but thats not easy changable by the user.
> > > 
> > > Yes, it's more question to VIm and Guenter than to you.
> > > 
> > 
> > Has support for providing module parameters with the kernel command line
> > been discontinued/deprecated, or did it run out of favor ? Sorry if I
> > missed that.
> 
> Latter according to Greg KH. One of the (plenty) examples [1].
> 
> [1]: https://www.mail-archive.com/driverdev-devel@linuxdriverproject.org/msg96495.html
> 
What is the suggested replacement ?

Guenter