On 04/19/2017 07:46 PM, Peng Fan wrote:
When using eMMC with 1.8V I/O, the VSELECT bit need to be set in
the USDHC controller when init.
This patch adds a parameter "vs18_enable" in fsl_esdhc_cfg
structure and priv data, so each controller can have different
settings.
We could not use CONFIG_SYS_FSL_ESDHC_FORCE_VSELECT, it has problem
that it will apply to all USDHC controllers and it only set the 1.8V
at init phase. So if user does not select to the eMMC device,
the voltage on the I/O pins are not correct.
Peng,
I don't quite understand this. Isn't the voltage supplied by the board?
I believe we have detection on our boards to decide 3.3v or 1.8v should
be supplied. Does that have anything to do with the voltage you are
talking about? I am referring to LS1046ARDB.
York
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