linux-kernel - RE: [PATCH] soc: imx: Makefile: only build soc-imx8 when CONFIG

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Date:   Tue, 14 Jan 2020 08:32:23 +0000
From:   Peng Fan <peng.fan@....com>
To:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
CC:     "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        Abel Vesa <abel.vesa@....com>,
        Leonard Crestez <leonard.crestez@....com>,
        Anson Huang <anson.huang@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH] soc: imx: Makefile: only build soc-imx8 when CONFIG_ARM64

Hi Uwe,

> Subject: Re: [PATCH] soc: imx: Makefile: only build soc-imx8 when
> CONFIG_ARM64
> 
> On Tue, Jan 14, 2020 at 08:08:45AM +0000, Peng Fan wrote:
> > From: Peng Fan <peng.fan@....com>
> >
> > Only need to build soc-imx8.c when CONFIG_ARM64 defined, no need to
> > build it for CONFIG_ARM32 currently.
> >
> > Signed-off-by: Peng Fan <peng.fan@....com>
> > ---
> >  drivers/soc/imx/Makefile | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile index
> > cf9ca42ff739..cfcbc62b11d7 100644
> > --- a/drivers/soc/imx/Makefile
> > +++ b/drivers/soc/imx/Makefile
> > @@ -1,5 +1,7 @@
> >  # SPDX-License-Identifier: GPL-2.0-only
> >  obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
> >  obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
> > +ifdef CONFIG_ARM64
> >  obj-$(CONFIG_ARCH_MXC) += soc-imx8.o
> > +endif
> 
> For earlier SoCs we had kconfig symbols like SOC_IMX25. Actually
> SOC_IMX8 would be the right one to decide about soc-imx8.c to be compiled,
> it would be easier to read and verify than the suggested
> "ARM64 && ARCH_MXC" and it would stay right once NXP presents it's next
> 64-bit SoC i.MX9.

There is no SOC_IMX8 currently. Need to introduce one in 
arch/arm64/Kconfig.platforms. But I not see other vendors
introduce options like SOC_XX. Is this the right direction to
add one in Kconfig.platforms?

Thanks,
Peng.

> 
> Best regards
> Uwe
> 
> --
> Pengutronix e.K.                           | Uwe Kleine-König
> |
> Industrial Linux Solutions                 |
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