| commit | 44acd492480f8c8047326f3cb02d3e4d3760ecd0 | [log] [tgz] |
|---|---|---|
| author | Peng Fan <peng.fan@nxp.com> | Wed Jul 10 14:43:07 2019 +0800 |
| committer | Peng Fan <peng.fan@nxp.com> | Mon Jul 15 10:30:08 2019 +0800 |
| tree | 903240d5b3fac9eacf60a5899ff655b67967f6c8 | |
| parent | 8277171663084e20c0eca7c0b9681019f1a2a353 [diff] |
mmc: support hs400 enhanced strobe mode eMMC 5.1+ supports HS400 Enhances Strobe mode without the need for tuning procedure. The flow is as following: - set HS_TIMIMG (Highspeed) - Host change freq to <= 52Mhz - set the bus width to Enhanced strobe and DDR8Bit(CMD6), EXT_CSD[183] = 0x86 instead of 0x80 - set HS_TIMING to 0x3 (HS400) - Host change freq to <= 200Mhz - Host select HS400 enhanced strobe complete Signed-off-by: Peng Fan <peng.fan@nxp.com>