linux-kernel - Re: [PATCH 1/2] mtd: mtk-quadspi: add support for memory-mapped flash reading

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Message-ID: <1573132996.8833.3.camel@mtksdaap41>
Date:   Thu, 7 Nov 2019 21:23:16 +0800
From:   Yingjoe Chen <yingjoe.chen@...iatek.com>
To:     Chuanhong Guo <gch981213@...il.com>
CC:     <linux-mtd@...ts.infradead.org>,
        Mark Rutland <mark.rutland@....com>,
        <devicetree@...r.kernel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        "Tudor Ambarus" <tudor.ambarus@...rochip.com>,
        Richard Weinberger <richard@....at>,
        <linux-kernel@...r.kernel.org>, Rob Herring <robh+dt@...nel.org>,
        <linux-mediatek@...ts.infradead.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Brian Norris <computersforpeace@...il.com>,
        David Woodhouse <dwmw2@...radead.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/2] mtd: mtk-quadspi: add support for memory-mapped
 flash reading

On Wed, 2019-11-06 at 22:07 +0800, Chuanhong Guo wrote:
> PIO reading mode on this controller is ridiculously inefficient
> (one cmd+addr+dummy sequence reads only one byte)
> This patch adds support for reading from memory-mapped flash area
> which increases reading speed from 1MB/s to 5.6MB/s

This may not be true for all MTK SoC. Which one are you testing?

Joe.C