Re: [PATCH 1/1] ARM: dts: sunxi: Add a olinuxino-lime2-emmc

From: Olliver Schinagl
Date: Wed May 04 2016 - 08:52:23 EST

Hey Radoslav,

On 04-05-16 14:30, Radoslav Kolev wrote:
2016-05-03 10:25 GMT+03:00 Chen-Yu Tsai <wens@xxxxxxxx>:
On Tue, May 3, 2016 at 3:21 PM, Olliver Schinagl <oliver@xxxxxxxxxxx> wrote:
+ bus-width = <4>;
Only 4 bits? We normally see eMMC with 8 bits. 4 bits are some kind of
embedded SD card.
On A20 as well? Our investigations so far have concluded that the A10 and
A20 have those pins not mapped out to pads. The IP does support it however
we assume.
You're right. My bad. First time A10/A20 sees eMMC support.
I can't say anything about A10/A20, but I have a board with A13 and
the same eMMC chip and it works fine in 8 bit mode.
Yep, sun5i actually brings them all out to pads, the A20 however does not :( We first thought that the A20 would also be an 8bitter, because the mmc IP appears to be the same as sun5i, but initial tests show it is not. As for A10, it has older IP and it might not even support 8 bit mode, let alone bring out the pins.

But with A20's + eMMC being available via the lime2, others may repeat my experiments! The lime2 is 8 bit connected.