linux-kernel - Re: [PATCH 06/13] media: davinci: vpif: Use platform_get_irq

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Date:   Thu, 6 Jan 2022 18:01:29 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     "Lad, Prabhakar" <prabhakar.csengg@...il.com>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Rob Herring <robh+dt@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>
Subject: Re: [PATCH 06/13] media: davinci: vpif: Use platform_get_irq_optional()
 to get the interrupt

On Thu, Jan 6, 2022 at 5:27 PM Lad, Prabhakar
<prabhakar.csengg@...il.com> wrote:
> On Thu, Jan 6, 2022 at 2:15 PM Andy Shevchenko
> <andy.shevchenko@...il.com> wrote:
> > On Thu, Jan 6, 2022 at 3:43 PM Andy Shevchenko
> > <andy.shevchenko@...il.com> wrote:
> > > On Wed, Jan 5, 2022 at 7:41 PM Lad, Prabhakar
> > > <prabhakar.csengg@...il.com> wrote:
> > > > On Wed, Jan 5, 2022 at 9:43 AM Andy Shevchenko

...

> > > >  #define DEFINE_RES_NAMED(_start, _size, _name, _flags)                 \
> > > > -       {                                                               \
> > > > +       (struct resource) {                                     \
> > >
> > > Yep, that's it.
> > >
> > > >                 .start = (_start),                                      \
> > > >                 .end = (_start) + (_size) - 1,                          \
> > > >                 .name = (_name),                                        \
> > > >
> > > > But there are some instances which need to be touched, for example
> > > > vexpress-sysreg.c [1]. Are you OK with files to be changed?
> > >
> > > Nice! That's exactly my point and you can sell it to the community
> > > because there are already users of it like this.
> > >
> > > Yes, I'm fine, but it seems it needs to be done treewide in one patch.
> > > Btw, how many of those already in use?
> >
> > Actually you don't need to change that. It's an array of resources and
> > everything should be kept as is there.
> >
> I do get below build failures, with the above literal change for
> vexpress-sysreg.c.
>
> drivers/mfd/vexpress-sysreg.c: At top level:
> drivers/mfd/vexpress-sysreg.c:64:37: error: initialiser element is not constant
>    64 |   .resources = (struct resource []) {
>       |                                     ^
> drivers/mfd/vexpress-sysreg.c:64:37: note: (near initialisation for
> ‘vexpress_sysreg_cells[0]’)
> drivers/mfd/vexpress-sysreg.c:73:37: error: initialiser element is not constant
>    73 |   .resources = (struct resource []) {
>       |                                     ^
> drivers/mfd/vexpress-sysreg.c:73:37: note: (near initialisation for
> ‘vexpress_sysreg_cells[1]’)
> drivers/mfd/vexpress-sysreg.c:82:37: error: initialiser element is not constant
>    82 |   .resources = (struct resource []) {
>       |                                     ^
> drivers/mfd/vexpress-sysreg.c:82:37: note: (near initialisation for
> ‘vexpress_sysreg_cells[2]’)
> drivers/mfd/vexpress-sysreg.c:90:37: error: initialiser element is not constant
>    90 |   .resources = (struct resource []) {
>       |                                     ^
> drivers/mfd/vexpress-sysreg.c:90:37: note: (near initialisation for
> ‘vexpress_sysreg_cells[3]’)
> drivers/mfd/vexpress-sysreg.c:93:2: warning: missing initialiser for
> field ‘ignore_resource_conflicts’ of ‘struct mfd_cell’
> [-Wmissing-field-initializers]
>    93 |  }

Hmm... Interesting, so I suppose the fix is to drop (struct resource
[]) parts from the driver?


-- 
With Best Regards,
Andy Shevchenko