linux-kernel - Re: [PATCH v7 1/4] mfd: bd71837: mfd driver for ROHM BD71837 PMIC

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Message-ID: <20180706070559.GW496@dell>
Date:   Fri, 6 Jul 2018 08:05:59 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
        Enric Balletbo Serra <eballetbo@...il.com>,
        Michael Turquette <mturquette@...libre.com>, sboyd@...nel.org,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Matti Vaittinen <mazziesaccount@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Sebastian Reichel <sre@...nel.org>, chenjh@...k-chips.com,
        Andrey Smirnov <andrew.smirnov@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Heiko Stübner <heiko@...ech.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-clk@...r.kernel.org,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-input@...r.kernel.org, mikko.mutanen@...rohmeurope.com,
        heikki.haikola@...rohmeurope.com
Subject: Re: [PATCH v7 1/4] mfd: bd71837: mfd driver for ROHM BD71837 PMIC

On Thu, 05 Jul 2018, Dmitry Torokhov wrote:

> On July 5, 2018 12:56:50 AM PDT, Matti Vaittinen <matti.vaittinen@...rohmeurope.com> wrote:
> >On Wed, Jul 04, 2018 at 06:57:39PM +0200, Enric Balletbo Serra wrote:
> >> Missatge de Dmitry Torokhov <dmitry.torokhov@...il.com> del dia dc.,
> >4
> >> de jul. 2018 a les 17:10:
> >> >
> >> > Hi Enric,
> >> >
> >> > On Tue, Jun 26, 2018 at 11:06:33AM +0200, Enric Balletbo Serra
> >wrote:
> >> > > Hi Matti,
> >> > >
> >> > > Thanks for the patch, a few comments below, some are feedback I
> >> > > received when I sent some patches to this subsystem.
> >> > >
> >> > > Missatge de Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
> >del
> >> > > dia dt., 19 de juny 2018 a les 12:57:
> >> > > > +};
> >> > > > +
> >> > > > +/* bd71837 multi function cells */
> >> > > > +static struct mfd_cell bd71837_mfd_cells[] = {
> >> > > > +       {
> >> > > > +               .name = "bd71837-clk",
> >> > > > +       }, {
> >> > > > +               .name = "bd718xx-pwrkey",
> >> > > > +               .resources = &irqs[0],
> >> > > > +               .num_resources = ARRAY_SIZE(irqs),
> >> > > > +       }, {
> >> > > > +               .name = "bd71837-pmic",
> >> > > > +       },
> >> > > nit: no comma at the end
> >> >
> >> > Actually, trailing comma is preferred on structures/arrays without
> >> > sentinels, because if one needs to add a new entry/new member, then
> >in
> >> > the diff there will have only one new line added, instead of one
> >line
> >> > being changed (adding now necessary comma) and one added.
> >> >
> >> 
> >> Many thanks for sharing your knowledge! That looks to me a good
> >> reason.
> >
> >So in this specific ecample leaving the comma does not help. The
> >opening
> >brace for new array element would be added to same line where the comma
> >is, right?
> 
> Ah, yes,  you are right. We usually have either:
> 
>         { /* element 1 */ },
>         { / *element 2 */ },
>         ...
> 
> or:
> 
>         {
>                 /* element 1 */
>         },
>         {
>                 /* element 2 */
>         },
> 
> but I do not think that it is codified in the CodingStyle.

FWIW, my *strong* preference for single line entries in the
aforementioned single line format.  Then Dmitry's explanation rings
true.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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