linux-kernel - Re: [PATCH 08/13] m68k: m68328: use legacy_timer

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Date:   Mon, 12 Oct 2020 17:30:49 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Russell King <linux@...linux.org.uk>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Finn Thain <fthain@...egraphics.com.au>,
        Philip Blundell <philb@....org>,
        Joshua Thompson <funaho@...ai.org>,
        Sam Creasey <sammy@...my.net>,
        "James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
        Helge Deller <deller@....de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        John Stultz <john.stultz@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        "linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
        Parisc List <linux-parisc@...r.kernel.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 08/13] m68k: m68328: use legacy_timer_tick()

On Mon, Oct 12, 2020 at 3:15 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Given this feature is SoC-specific, not platform-specific, perhaps
> it makes sense to move the selects to the M68{,EZ,VZ}328 symbols?
>
> Regardless:
> Reviewed-by: Geert Uytterhoeven <geert@...ux-m68k.org>

Ok, folded in the change blow, using one less line. I couldn't figure
out whether
it should just be part of the CONFIG_M68000 instead, which doesn't appear
to have any machine support by itself. The dragonball CPU configuration
looks really odd, because you have to build exactly one of M68{,EZ,VZ}328
into the kernel to get a successful compilation, while Kconfig allows
many other combinations.

     Arnd

diff --git a/arch/m68k/Kconfig.cpu b/arch/m68k/Kconfig.cpu
index 322a35ef14c6..648054d4f860 100644
--- a/arch/m68k/Kconfig.cpu
+++ b/arch/m68k/Kconfig.cpu
@@ -104,6 +104,7 @@ config M68060
 config M68328
        bool "MC68328"
        depends on !MMU
+       select LEGACY_TIMER_TICK
        select M68000
        help
          Motorola 68328 processor support.
@@ -111,6 +112,7 @@ config M68328
 config M68EZ328
        bool "MC68EZ328"
        depends on !MMU
+       select LEGACY_TIMER_TICK
        select M68000
        help
          Motorola 68EX328 processor support.
@@ -118,6 +120,7 @@ config M68EZ328
 config M68VZ328
        bool "MC68VZ328"
        depends on !MMU
+       select LEGACY_TIMER_TICK
        select M68000
        help
          Motorola 68VZ328 processor support.
diff --git a/arch/m68k/Kconfig.machine b/arch/m68k/Kconfig.machine
index 0ff9338b958e..e3c835440d9a 100644
--- a/arch/m68k/Kconfig.machine
+++ b/arch/m68k/Kconfig.machine
@@ -146,7 +146,6 @@ config PILOT
 config PILOT3
        bool "Pilot 1000/5000, PalmPilot Personal/Pro, or PalmIII support"
        depends on M68328
-       select LEGACY_TIMER_TICK
        select PILOT
        help
          Support for the Palm Pilot 1000/5000, Personal/Pro and PalmIII.
@@ -160,21 +159,18 @@ config XCOPILOT_BUGS
 config UCSIMM
        bool "uCsimm module support"
        depends on M68EZ328
-       select LEGACY_TIMER_TICK
        help
          Support for the Arcturus Networks uCsimm module.

 config UCDIMM
        bool "uDsimm module support"
        depends on M68VZ328
-       select LEGACY_TIMER_TICK
        help
          Support for the Arcturus Networks uDsimm module.

 config DRAGEN2
        bool "DragenEngine II board support"
        depends on M68VZ328
-       select LEGACY_TIMER_TICK
        help
          Support for the DragenEngine II board.