linux-kernel - Re: [PATCH v2 4/5] spi: spi-mtk-nor: support 36bit dma addressing to mediatek

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Message-ID: <CAATdQgBOdEAFvsf-mukzmU0Z9MevMzPvtnuX2mJjLGU9VivDUQ@mail.gmail.com>
Date:   Mon, 21 Sep 2020 14:54:32 +0800
From:   Ikjoon Jang <ikjn@...omium.org>
To:     Yingjoe Chen <yingjoe.chen@...iatek.com>
Cc:     Rob Herring <robh+dt@...nel.org>, Mark Brown <broonie@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, linux-spi@...r.kernel.org,
        linux-mtd@...ts.infradead.org,
        Matthias Brugger <matthias.bgg@...il.com>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/5] spi: spi-mtk-nor: support 36bit dma addressing to mediatek

On Sat, Sep 19, 2020 at 11:26 PM Yingjoe Chen <yingjoe.chen@...iatek.com> wrote:
>
> On Fri, 2020-09-18 at 16:31 +0800, Ikjoon Jang wrote:
> > This patch enables 36bit dma address support to spi-mtk-nor.
> > Currently 36bit dma addressing is enabled only for mt8192-nor.
[snip]
>
> Do we need to set sp->high_dma when we have >32bits DMA?
>

Yes, to do so, you need to add new compatible strings if there are
more SoCs support >32bit other than mt8192
or just ust mt8192-nor for binding.

> Joe.C