linux-kernel - RE: [PATCH V2 2/9] ARM: imx: Select MXC_CLK for ARCH

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Date:   Wed, 17 Jun 2020 12:36:22 +0000
From:   Anson Huang <anson.huang@....com>
To:     Aisheng Dong <aisheng.dong@....com>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "oleksandr.suvorov@...adex.com" <oleksandr.suvorov@...adex.com>,
        Stefan Agner <stefan.agner@...adex.com>,
        "arnd@...db.de" <arnd@...db.de>, Abel Vesa <abel.vesa@....com>,
        Peng Fan <peng.fan@....com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "allison@...utok.net" <allison@...utok.net>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "info@...ux.net" <info@...ux.net>,
        Leonard Crestez <leonard.crestez@....com>,
        Andy Duan <fugang.duan@....com>,
        Daniel Baluta <daniel.baluta@....com>,
        "yuehaibing@...wei.com" <yuehaibing@...wei.com>,
        "sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>
CC:     dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH V2 2/9] ARM: imx: Select MXC_CLK for ARCH_MXC



> Subject: RE: [PATCH V2 2/9] ARM: imx: Select MXC_CLK for ARCH_MXC
> 
> > From: Anson Huang <Anson.Huang@....com>
> > Sent: Tuesday, June 9, 2020 3:32 PM
> >
> > i.MX common clock drivers may support module build, so it is NOT
> > selected by default, for ARCH_MXC ARMv7 platforms, need to select it
> > manually to make build pass.
> >
> > Signed-off-by: Anson Huang <Anson.Huang@....com>
> 
> Can't the original def_xxx work?
> 
> config MXC_CLK
>         tristate
>         def_tristate ARCH_MXC

Such change will make MXC_CLK=y even all i.MX8 SoCs clock drivers are selected as module,
so it does NOT meet the requirement of module support. Below is from .config when all
i.MX8 SoCs clock drivers are configured to module.

 CONFIG_MXC_CLK=y
 CONFIG_MXC_CLK_SCU=m
 CONFIG_CLK_IMX8MM=m
 CONFIG_CLK_IMX8MN=m
 CONFIG_CLK_IMX8MP=m
 CONFIG_CLK_IMX8MQ=m
 CONFIG_CLK_IMX8QXP=m

Anson