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Re: Install on Orange Pi Plus eMMC work but no reboot

On Fri, Oct 07, 2016 at 01:44:13AM +0200, Jean-Christian de Rivaz wrote:
> Did you realize that SD card and eMMC uses both exactly the same signaling
> and controller on all processors, not only on the Allwinner family ? If a
> board designer is stupid enough to connect the eMMC instead of the SD card
> on the controller looked first by the on chip ROM, then it's not an argument
> to not support all the others boards that did it the right way.

Well certainly the SD/MMC controllers are not all the same.  Certainly the
AM572x has 4 MMC controllers, only one of them can drive eMMC, one can
do SDIO, one is only 4 bit so best for uSD, and I forget the limits on
the last one.  They have different widths and maximum speeds.  So yes
they are all MMC, but they are not all the same.

> Stupid boards need stupid recovery procedure anyway, regardless of the
> operating system. This is not a Debian problem. Or least Debian should not
> try to officially support broken boards. This is just a wast of time. Better
> to concentrate into work that yield a productive and safe result.
> This thread is explicitly about the Orange Pi Plus board, because there
> exists a specific Debian installer SD card firmware for that board. This
> board do the boot order in the right way and it's perfectly safe to write
> the bootloader on his eMMC.
> I think it's a way too conservative approach, just give the option with a
> warning. At least this will make some users happy by allowing to install
> Debian on eMMC from his superb installer. The current situation prevent any
> users to make a Debian install on a eMMC because of a tiny missing piece.
> This is frustrating.

Len Sorensen

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