[MX25][MMC] mmc esdhc very slow r/w speed

[maximkochetkov]

Hi!
I have the same problem as:
http://lists.infradead.org/pipermail/linux-arm-kernel/2012-March/091529.html
Read/write speed of SDHC card is very slow.
Kernel 2.6.35 from Freescale works with a excellent SDHC performance.
Mainline kernels from 3.17 to 4.9.5 works very slow with SDHC.
Is there any solutions about this problem?

[igorpadykov]

Hi Maxim

there are number of eSDHC errata which should be carefully

implemented to achieve good performance

http://www.freescale.com/files/dsp/doc/errata/IMX25CE.pdf 

Unfortunately there is no nxp(fsl) i.MX25 support for new kernels

and you should implement this yourself or consider some mss services

like Pro-Support www.nxp.com/prosupport .

Best regards
igor
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[maximkochetkov]

What is the latest nxp (fsl) kernel version and where can I get it?

[igorpadykov]

http://www.nxp.com/products/power-management/pmics/power-management-for-i.mx-application-processors/...
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