linux-kernel - Re: [RESEND v13 07/22] soc: mediatek: mmsys: specify 64BIT dependency for MTK

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Date:   Tue, 8 Mar 2022 14:41:59 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     "Nancy.Lin" <nancy.lin@...iatek.com>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>, wim@...ux-watchdog.org,
        linux@...ck-us.net
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        "jason-jh . lin" <jason-jh.lin@...iatek.com>,
        Yongqiang Niu <yongqiang.niu@...iatek.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org, llvm@...ts.linux.dev,
        singo.chang@...iatek.com, srv_heupstream@...iatek.com,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [RESEND v13 07/22] soc: mediatek: mmsys: specify 64BIT dependency
 for MTK_MMSYS

Il 08/03/22 10:30, Nancy.Lin ha scritto:
> Because mtk-mutex change to use unsigned long mutex module type,
> it should depend 64BIT. This is a preparation for adding support for
> mt8195 vdosys1 mutex.
> 
> Signed-off-by: Nancy.Lin <nancy.lin@...iatek.com>
> ---
>   drivers/soc/mediatek/Kconfig | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/soc/mediatek/Kconfig b/drivers/soc/mediatek/Kconfig
> index fdd8bc08569e..24f792c46444 100644
> --- a/drivers/soc/mediatek/Kconfig
> +++ b/drivers/soc/mediatek/Kconfig
> @@ -68,6 +68,7 @@ config MTK_SCPSYS_PM_DOMAINS
>   config MTK_MMSYS
>   	bool "MediaTek MMSYS Support"
>   	default ARCH_MEDIATEK
> +	depends on 64BIT
>   	depends on HAS_IOMEM
>   	help
>   	  Say yes here to add support for the MediaTek Multimedia

Breaking old platforms is forbidden.

MT2701 and MT7623N are 32-bit ARM SoCs and:
- mt2701 needs mmsys only; but
- mt7623n needs mmsys and mutex.

Besides, this is an easy fix: just change your unsigned long to a fixed size u64.