Hi,
On 10/20/2015 10:57 AM, Siarhei Siamashka wrote:
Hello,
Currently SD card support seems to be broken at least on the ODROID-X board in U-Boot v2015.10. Checking older U-Boot releases shows that it used to work in v2014.10, and bisecting points to the commit a276172cf32386c211c75638f6bf3c0d59ba03ba ("arm: exynos: fix the div value for set_mmc_clk"): http://git.denx.de/?p=u-boot.git;a=commitdiff;h=a276172cf32386c211c75638f6bf...
Reverting this commit resolves the problem and the SD card starts working properly.
As an extra test, I also tried to add debugging print at the end of the exynos4_set_mmc_clk() function, so that it calls exynos4_get_mmc_clk() with the original 'dev_index' and reports the resulting mmc clock speed. After reverting the patch, the reported value is 50MHz. Before reverting it, the reported value was 100MHz. This is a Transcend class 6 SDHC card.
Is this enough information or should I check something else?
I will check this..I needs to get more information. I want to know div value passed by argument.
Best Regards, Jaehoon Chung