linux-kernel - Re: [PATCH] clk: fix link error for rcar-gen2

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Message-ID: <CAMuHMdXRjgETtjBHHu2mHt9iEfe_rL5fpD-pgPH9MWniOFubQQ@mail.gmail.com>
Date:   Mon, 31 Oct 2016 10:23:00 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Magnus Damm <damm+renesas@...nsource.se>,
        Simon Horman <horms+renesas@...ge.net.au>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] clk: fix link error for rcar-gen2

On Tue, Oct 25, 2016 at 10:37 AM, Geert Uytterhoeven
<geert@...ux-m68k.org> wrote:
> On Fri, Oct 21, 2016 at 11:07 PM, Arnd Bergmann <arnd@...db.de> wrote:
>> On Friday, October 21, 2016 8:01:49 PM CEST Geert Uytterhoeven wrote:
>>> > diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile
>>> > index 90dd0db7d9c6..762d122eddec 100644
>>> > --- a/drivers/clk/renesas/Makefile
>>> > +++ b/drivers/clk/renesas/Makefile
>>> > @@ -4,11 +4,7 @@ obj-$(CONFIG_ARCH_R8A73A4)             += clk-r8a73a4.o clk-div6.o
>>> >  obj-$(CONFIG_ARCH_R8A7740)             += clk-r8a7740.o clk-div6.o
>>> >  obj-$(CONFIG_ARCH_R8A7778)             += clk-r8a7778.o
>>> >  obj-$(CONFIG_ARCH_R8A7779)             += clk-r8a7779.o
>>> > -obj-$(CONFIG_ARCH_R8A7790)             += clk-rcar-gen2.o clk-div6.o
>>> > -obj-$(CONFIG_ARCH_R8A7791)             += clk-rcar-gen2.o clk-div6.o
>>> > -obj-$(CONFIG_ARCH_R8A7792)             += clk-rcar-gen2.o clk-div6.o
>>> > -obj-$(CONFIG_ARCH_R8A7793)             += clk-rcar-gen2.o clk-div6.o
>>> > -obj-$(CONFIG_ARCH_R8A7794)             += clk-rcar-gen2.o clk-div6.o
>>> > +obj-$(CONFIG_ARCH_RCAR_GEN2)           += clk-rcar-gen2.o clk-div6.o
>>> >  obj-$(CONFIG_ARCH_R8A7795)             += r8a7795-cpg-mssr.o rcar-gen3-cpg.o
>>> >  obj-$(CONFIG_ARCH_R8A7796)             += r8a7796-cpg-mssr.o rcar-gen3-cpg.o
>>> >  obj-$(CONFIG_ARCH_SH73A0)              += clk-sh73a0.o clk-div6.o
>>>
>>> Please don't fix it this way, as it will make it _harder_ to convert the R-Car
>>> Gen2 SoCs to the modern CPG/MSSR driver later.
>>
>> Ok, I see. How about just adding another line for r8a7743 and
>> dropping that again after the timer_init has been converted?
>
> That's an option, but it touches a different subsystem ;-)

Alternatively, the call to rcar_gen2_clocks_init() in
arch/arm/mach-shmobile/setup-rcar-gen2.c:rcar_gen2_timer_init()
can be protected temporarily by

    #if defined(CONFIG_R8A7790) || ... || defined(CONFIG_R8A7794)

until "[PATCH v4 00/23] soc: renesas: Add R-Car RST driver for
obtaining mode pin state" went it, which will remove that call.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds