linux-kernel - Re: [PATCH] sh: sh4a: Remove unused tmu3

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Date:   Sat, 18 Jan 2020 09:01:28 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        Linux-sh list <linux-sh@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
Subject: Re: [PATCH] sh: sh4a: Remove unused tmu3_device

On Thu, Jan 09, 2020 at 01:56:58PM +0100, Geert Uytterhoeven wrote:
> Hi Krzysztof,
> 
> On Wed, Jan 8, 2020 at 8:45 PM Krzysztof Kozlowski <krzk@...nel.org> wrote:
> > Remove left-over from previous cleanups to silence the warning:
> >
> >     arch/sh/kernel/cpu/sh4a/setup-sh7786.c:243:31:
> >         warning: ‘tmu3_device’ defined but not used [-Wunused-variable]
> >
> > Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> > ---
> >  arch/sh/kernel/cpu/sh4a/setup-sh7786.c | 21 ---------------------
> >  1 file changed, 21 deletions(-)
> >
> > diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7786.c b/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
> > index 4b0db8259e3d..22d1c38f742f 100644
> > --- a/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
> > +++ b/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
> > @@ -229,27 +229,6 @@ static struct platform_device tmu2_device = {
> >         .num_resources  = ARRAY_SIZE(tmu2_resources),
> >  };
> >
> > -static struct sh_timer_config tmu3_platform_data = {
> > -       .channels_mask = 7,
> > -};
> > -
> > -static struct resource tmu3_resources[] = {
> > -       DEFINE_RES_MEM(0xffde0000, 0x2c),
> > -       DEFINE_RES_IRQ(evt2irq(0x7c0)),
> > -       DEFINE_RES_IRQ(evt2irq(0x7c0)),
> > -       DEFINE_RES_IRQ(evt2irq(0x7c0)),
> > -};
> > -
> > -static struct platform_device tmu3_device = {
> > -       .name           = "sh-tmu",
> > -       .id             = 3,
> > -       .dev = {
> > -               .platform_data  = &tmu3_platform_data,
> > -       },
> > -       .resource       = tmu3_resources,
> > -       .num_resources  = ARRAY_SIZE(tmu3_resources),
> > -};
> > -
> >  static const struct sh_dmae_channel dmac0_channels[] = {
> >         {
> >                 .offset = 0,
> 
> Looks like the previous cleanup accidentally removed one too many tmu
> device pointers.  The old style used one device per timer, the new style
> uses one device per 3 timers, i.e. 4 devices for 12 timers.
> 
> So the correct fix would be to re-add "&tmu3_device" to
> sh7786_early_devices[].
> 
> Fixes: 1399c195ef5009bf ("sh: Switch to new style TMU device")

Indeed, thanks. I'll send v2.

Best regards,
Krzysztof