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3 Commits

Author SHA1 Message Date
Ivan Grokhotkov
ab68b9d90d soc,sdmmc: fix build failures when NDEBUG is used 
Use explicit error checking instead of asserts, use SOC_LOG to print
error/warning messages where needed.
 2018-10-15 14:57:12 +08:00
Ivan Grokhotkov
78fab8a0f9 sdmmc: implement partial DDR support 
Works for 3.3V eMMC in 4 line mode.
Not implemented:
- DDR mode for SD cards (UHS-I) also need voltage to be switched to 1.8V.
- 8-line DDR mode for eMMC to be implemented later.
 2018-08-30 13:11:54 +08:00
Ivan Grokhotkov
de42d99b1d sdmmc: command layer refactoring 2018-08-30 13:11:54 +08:00