Hey Christo,
On 04-05-16 15:07, Christo Radev wrote:
Hi Olliver,
I have already test it a few weeks ago and definitely can say that
8-bit bus did not work on A20-Olinuxino-Lime2-eMMC with mainline kernel.
See may post here
<http://forum.armbian.com/index.php/topic/853-armbian-customization/page-2#entry7361>.
I saw, but you forgot to define the pins for 4.x :)
See my patch from earlier:
http://lists.infradead.org/pipermail/linux-arm-kernel/2015-September/368887.html
Olliver
Best regards
Chris
On Wednesday, May 4, 2016 at 3:52:17 PM UTC+3, Olliver Schinagl wrote:
Hey Radoslav,
On 04-05-16 14:30, Radoslav Kolev wrote:
> 2016-05-03 10:25 GMT+03:00 Chen-Yu Tsai <[email protected]
<javascript:>>:
>> On Tue, May 3, 2016 at 3:21 PM, Olliver Schinagl
<[email protected] <javascript:>> 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.
Olliver
>
> Regards,
> Radoslav
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