linux-kernel - Re: [PATCH v2] ARM: dts: imx7-colibri: Fix frequency for sd/mmc

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Message-ID: <20200224034228.GI27688@dragon>
Date:   Mon, 24 Feb 2020 11:42:28 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Oleksandr Suvorov <oleksandr.suvorov@...adex.com>
Cc:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Igor Opanyuk <igor.opanyuk@...adex.com>,
        Philippe Schenker <philippe.schenker@...adex.com>,
        Fabio Estevam <festevam@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Stefan Agner <stefan@...er.ch>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] ARM: dts: imx7-colibri: Fix frequency for sd/mmc

On Wed, Feb 19, 2020 at 01:11:24PM +0000, Oleksandr Suvorov wrote:
> SD/MMC on Colibri iMX7S/D modules successfully support
> 200Mhz frequency in HS200 mode.
> 
> Removing the unnecessary max-frequency limit significantly
> increases the performance:
> 
> == before fix ====
> root@...ibri-imx7-emmc:~# hdparm -t /dev/mmcblk0
> /dev/mmcblk0:
>  Timing buffered disk reads: 252 MB in  3.02 seconds =  83.54 MB/sec
> ==================
> 
> === after fix ====
> root@...ibri-imx7-emmc:~# hdparm -t /dev/mmcblk0
> /dev/mmcblk0:
>  Timing buffered disk reads: 408 MB in  3.00 seconds = 135.94 MB/sec
> ==================
> 
> Fixes: f928a4a377e4 ("ARM: dts: imx7: add Toradex Colibri iMX7D 1GB (eMMC) support")
> Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@...adex.com>
> Reviewed-by: Fabio Estevam <festevam@...il.com>

Applied, thanks.