Commit graph

3 commits

Author SHA1 Message Date
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
michael
5b37a96ddc feature(sdio): allow to enable internal pullups of the SDIO host and slave as a debug feature
NOTE: the internal pullups are not totally reliable, please do add external pullups on your bus.
2018-06-14 12:04:22 +08:00
Ivan Grokhotkov
edd924f273 sdmmc: add peripheral driver and protocol layer 2017-01-09 04:51:24 +08:00