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4 Commits

Author SHA1 Message Date
michael
232d98608a sdmmc: add communication check for eMMC after frequency switch 2019-12-12 08:11:17 +00:00
michael
8a364b4bdf sdmmc: support SDIO over SPI 2019-04-12 02:24:28 +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