linux-kernel - Re: [PATCH v4 2/2] soc: mediatek: add mtk-devapc driver

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Date:   Mon, 3 Aug 2020 23:38:07 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     Neal Liu <neal.liu@...iatek.com>
Cc:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        devicetree@...r.kernel.org,
        wsd_upstream <wsd_upstream@...iatek.com>,
        lkml <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v4 2/2] soc: mediatek: add mtk-devapc driver

Neal Liu <neal.liu@...iatek.com> 於 2020年8月3日 週一 下午12:05寫道：
>
> Hi Chun-Kuang,
>
> On Sun, 2020-08-02 at 07:50 +0800, Chun-Kuang Hu wrote:
> > Hi, Neal:
> >
> > Neal Liu <neal.liu@...iatek.com> 於 2020年7月29日 週三 下午4:29寫道：
> > >
> > > MediaTek bus fabric provides TrustZone security support and data
> > > protection to prevent slaves from being accessed by unexpected
> > > masters.
> > > The security violation is logged and sent to the processor for
> > > further analysis or countermeasures.
> > >
> > > Any occurrence of security violation would raise an interrupt, and
> > > it will be handled by mtk-devapc driver. The violation
> > > information is printed in order to find the murderer.
> > >
> > > Signed-off-by: Neal Liu <neal.liu@...iatek.com>
> > > ---
> >
> > [snip]
> >
> > > +
> > > +struct mtk_devapc_context {
> > > +       struct device *dev;
> > > +       u32 vio_idx_num;
> > > +       void __iomem *devapc_pd_base;
> >
> > This is devapc context, so prefix 'devapc' is redundant.
> > And, what does 'pd' mean?
>
> 'pd' means power down. Of course we would also remove it as well.
> I suggest to change it as 'infra_base'.

This is OK for me.

>
> >
> > Regards,
> > Chun-Kuang.
> >
> > > +       struct mtk_devapc_vio_info *vio_info;
> > > +       const struct mtk_devapc_pd_offset *offset;
> > > +       const struct mtk_devapc_vio_dbgs *vio_dbgs;
> > > +};
> > > +
>