How to set SD clock

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I solved this problem with reference to the following link.

Linux-altera 4.12 failes MMC on CycloneV, while ltsi does not

I’m setting up a system on a CycloneV on Atlas-SoC, and I’m using Yocto Pyro. I’m using meta-altera from https://github.com/kraj/meta-altera to build the kernel. The preloader and u-boot is built using Quartus and EDS. I’m using meta-linaro and use Linaro GCC 6.3. If I select KERNEL_PROVIDER=“linux-altera-ltsi” which is 4.1.33, everything boots fine. However if I select KERNEL_PROVIDER=“linux-altera” and version 4.12 or 4.11, I get failures in MMC, which ultimately fails the boot. Any ideas to…