linux-kernel - Re: [PATCH] soc: imx: Fix build error without CONFIG_SOC

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Date:   Wed, 24 Apr 2019 08:11:42 +0000
From:   Leonard Crestez <leonard.crestez@....com>
To:     Yue Haibing <yuehaibing@...wei.com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        Abel Vesa <abel.vesa@....com>
CC:     "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "l.stach@...gutronix.de" <l.stach@...gutronix.de>,
        Aisheng Dong <aisheng.dong@....com>,
        Anson Huang <anson.huang@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] soc: imx: Fix build error without CONFIG_SOC_BUS

On 4/24/2019 11:00 AM, Yue Haibing wrote:
> From: YueHaibing <yuehaibing@...wei.com>
> 
> During randconfig builds, I occasionally run into an invalid configuration
> 
> drivers/soc/imx/soc-imx8.o: In function `imx8_soc_init':
> soc-imx8.c:(.init.text+0x144): undefined reference to `soc_device_register'
> 
> while CONFIG_SOC_BUS is not set, the building failed like this. This patch
> selects SOC_BUS to fix it.
> 
> diff --git a/drivers/soc/imx/Kconfig b/drivers/soc/imx/Kconfig
> @@ -5,6 +5,7 @@ config IMX_GPCV2_PM_DOMAINS
>   	depends on ARCH_MXC || (COMPILE_TEST && OF)
>   	depends on PM
>   	select PM_GENERIC_DOMAINS
> +	select SOC_BUS
>   	default y if SOC_IMX7D

You should "select SOC_BUS" from "config ARCH_MXC" in arm64 
Kconfig.platforms, not from a power domain implementation.

Your patch works because arm64 ARCH_MXC currently does "select 
IMX_GPCV2_PM_DOMAINS" but it's silly to use this intermediary.

--
Regards,
Leonard