linux-kernel - Re: [RFC PATCH v3 01/17] ARM: add CONFIG_ARCH_SUNXI_V7 for differentiate ARMv5/v7 Allwinner SoCs

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Message-ID: <20181122155703.wsziwzybqwcmn25w@flea>
Date:   Thu, 22 Nov 2018 16:57:03 +0100
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Mesih Kilinc <mesihkilinc@...il.com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-sunxi@...glegroups.com,
        Chen-Yu Tsai <wens@...e.org>,
        Russell King <linux@...linux.org.uk>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Marc Zyngier <marc.zyngier@....com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Icenowy Zheng <icenowy@...c.io>,
        Rob Herring <robh+dt@...nel.org>,
        Julian Calaby <julian.calaby@...il.com>
Subject: Re: [RFC PATCH v3 01/17] ARM: add CONFIG_ARCH_SUNXI_V7 for
 differentiate ARMv5/v7 Allwinner SoCs

On Thu, Nov 22, 2018 at 06:07:51PM +0300, Mesih Kilinc wrote:
> On 18/11/22 09:26, Maxime Ripard wrote:
> > On Wed, Nov 21, 2018 at 09:30:34PM +0300, Mesih Kilinc wrote:
> > > Allwinner also has some ARMv5 SoCs.
> > > 
> > > In order to add support for them, add a CONFIG_ARCH_SUNXI_V7 bool config
> > > which is selected when a ARMv7 soc is selected, and make CONFIG_ARCH_SUNXI
> > > a common option which is selected by both V7 and V5 sunxi option.
> > > 
> > > Signed-off-by: Mesih Kilinc <mesihkilinc@...il.com>
> > > ---
> > >  arch/arm/mach-sunxi/Kconfig | 23 ++++++++++++++++-------
> > >  1 file changed, 16 insertions(+), 7 deletions(-)
> > > 
> > > diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
> > > index d9c8ecf..7e5f173 100644
> > > --- a/arch/arm/mach-sunxi/Kconfig
> > > +++ b/arch/arm/mach-sunxi/Kconfig
> > > @@ -6,31 +6,38 @@ menuconfig ARCH_SUNXI
> > >  	select GENERIC_IRQ_CHIP
> > >  	select GPIOLIB
> > >  	select PINCTRL
> > > -	select PM_OPP
> > >  	select SUN4I_TIMER
> > >  	select RESET_CONTROLLER
> > > +	help
> > > +	  Support for Allwinner ARM-based family of processors
> > >  
> > >  if ARCH_SUNXI
> > >  
> > > +if ARCH_MULTI_V7
> > > +
> > > +config ARCH_SUNXI_V7
> > > +	bool
> > > +	select PM_OPP
> > > +
> > 
> > Actually, thinking more about this, I don't see why the PM_OPP config
> > option should be made specific to the ARMv7 sunxi SoCs, you will have
> > things cpufreq enabled at some point as well on the armv5 support.
> > 
> OK. I was basing this code to the first patch series. 
> So there will be no need for ARCH_SUNXI_VX configs. Should I drop them
> and differantiate IC's by only ARCH_MULTI_VX?

Yeah, that's probably enough for now, and we can always merge some
patch along those lines if we ever need it later.

Thanks!
Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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