| From 2773fe1d31c42ffae2a9cb9a6055d99dd86e2fee Mon Sep 17 00:00:00 2001 |
| From: Oleksandr Suvorov <oleksandr.suvorov@toradex.com> |
| Date: Wed, 19 Feb 2020 13:11:24 +0000 |
| Subject: ARM: dts: imx7-colibri: Fix frequency for sd/mmc |
| |
| From: Oleksandr Suvorov <oleksandr.suvorov@toradex.com> |
| |
| commit 2773fe1d31c42ffae2a9cb9a6055d99dd86e2fee upstream. |
| |
| 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: f928a4a377e4 ("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> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| arch/arm/boot/dts/imx7-colibri.dtsi | 1 - |
| 1 file changed, 1 deletion(-) |
| |
| --- a/arch/arm/boot/dts/imx7-colibri.dtsi |
| +++ b/arch/arm/boot/dts/imx7-colibri.dtsi |
| @@ -336,7 +336,6 @@ |
| assigned-clock-rates = <400000000>; |
| bus-width = <8>; |
| fsl,tuning-step = <2>; |
| - max-frequency = <100000000>; |
| vmmc-supply = <®_module_3v3>; |
| vqmmc-supply = <®_DCDC3>; |
| non-removable; |