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ARM: dts: imx7-colibri: Fix frequency for sd/mmc

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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@colibri-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@colibri-imx7-emmc:~# hdparm -t /dev/mmcblk0
/dev/mmcblk0:
 Timing buffered disk reads: 408 MB in  3.00 seconds = 135.94 MB/sec
==================

Fixes: f928a4a377 ("ARM: dts: imx7: add Toradex Colibri iMX7D 1GB (eMMC) support")
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Oleksandr Suvorov 2020-02-19 13:11:24 +00:00 committed by Shawn Guo
parent 26c4b4758f
commit 2773fe1d31
1 changed files with 0 additions and 1 deletions
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1
arch/arm/boot/dts/imx7-colibri.dtsi
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@ -336,7 +336,6 @@
assigned-clock-rates = <400000000>;
bus-width = <8>;
fsl,tuning-step = <2>;
max-frequency = <100000000>;
vmmc-supply = <&reg_module_3v3>;
vqmmc-supply = <&reg_DCDC3>;
non-removable;