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SDIO3.0 + 4.1.15 kernel

Question asked by Gary Bisson on Jul 28, 2016
Latest reply on Aug 16, 2016 by Gary Bisson



As SDIO3.0 been tested on the 4.1.15 kernel?


Asking the question because we are using a new WiFi chip which works in SDIO3.0 mode on our i.MX6Q Nitrogen6x boards. This worked flawlessly on the 3.14.52 kernel. It is working on 4.1.15 kernel but it is now throwing the following errors every few seconds:

mmc2: Got data interrupt 0x00000002 even though no data operation was in progress.


Doing a git bisect showed this commit is the one introducing the issue:

MLK-12391-4 mmc: sdhci-esdhc-imx: enable hw auto retuning for MAN_TUNING

linux-2.6-imx.git - Freescale i.MX Linux Tree


After reverting this patch all the warnings are gone. Can the NXP Linux team confirm if SDIO3.0 has been tested and if this patch is mandatory?