linux-kernel - RE: [PATCH V6 4/7] mfd: da9061: MFD core support

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Date:   Tue, 28 Mar 2017 10:42:42 +0000
From:   Steve Twiss <stwiss.opensource@...semi.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Lee Jones <lee.jones@...aro.org>
CC:     kbuild test robot <lkp@...el.com>,
        Steve Twiss <stwiss.opensource@...semi.com>,
        "kbuild-all@...org" <kbuild-all@...org>,
        LINUX-KERNEL <linux-kernel@...r.kernel.org>,
        DEVICETREE <devicetree@...r.kernel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Eduardo Valentin <edubezval@...il.com>,
        Guenter Roeck <linux@...ck-us.net>,
        LINUX-INPUT <linux-input@...r.kernel.org>,
        LINUX-PM <linux-pm@...r.kernel.org>,
        LINUX-WATCHDOG <linux-watchdog@...r.kernel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        "Mark Rutland" <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        "Support Opensource" <Support.Opensource@...semi.com>,
        Wim Van Sebroeck <wim@...ana.be>,
        Zhang Rui <rui.zhang@...el.com>
Subject: RE: [PATCH V6 4/7] mfd: da9061: MFD core support

On 28 March 2017 09:37, Geert Uytterhoeven wrote:
> Subject: Re: [PATCH V6 4/7] mfd: da9061: MFD core support
> 
> Hi Lee,
> 
> On Tue, Mar 28, 2017 at 10:21 AM, Lee Jones <lee.jones@...aro.org> wrote:
> >> [auto build test WARNING on ljones-mfd/for-mfd-next]
> >> [also build test WARNING on v4.11-rc4 next-20170327]
> >> base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
> >> config: x86_64-randconfig-x009-201713 (attached as .config)
> >> compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
> >> reproduce:
> >>         # save the attached .config to linux build tree
> >>         make ARCH=x86_64
> >>
> >> All warnings (new ones prefixed by >>):
> >>
> >>    drivers//mfd/da9062-core.c: In function 'da9062_i2c_probe':
> >> >> drivers//mfd/da9062-core.c:845:21: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
> >>       chip->chip_type = (int)match->data;
> >>                        ^
> >
> > Please use longs or enums.
> 
> Enums would still give a warning on 64-bit.
> The simple fix is change the cast from (int) to (uintptr_t).

Hi Lee and Geert,

How about this? Fix by redefining the enum chip_type to be an int.
Then, just use substitution:
#define COMPAT_TYPE_DA9061  1
#define COMPAT_TYPE_DA9062  2

That would be simple.
Are there any reasons this would not be acceptable?

Regards,
Steve