On 28/12/17 12:00, ernest.zhang wrote:
> In some case of eMMC used as boot device, the eMMC signaling voltage is
> fixed to 1.8v, bios can set o2 sd host controller register 0x308 bit4 to
> let host controller skip try 3.3.v signaling voltage in eMMC initialize
> process.
> O2 sd host controller ha
In some case of eMMC used as boot device, the eMMC signaling voltage is
fixed to 1.8v, bios can set o2 sd host controller register 0x308 bit4 to
let host controller skip try 3.3.v signaling voltage in eMMC initialize
process.
O2 sd host controller has a function named hardware tuning. In software
t
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