[Gta04-owner] GTA04 revisions with 1G of RAM?

H. Nikolaus Schaller hns at goldelico.com
Sat Jan 19 15:18:56 CET 2019

Hi Denis,

> Am 19.01.2019 um 14:58 schrieb Denis 'GNUtoo' Carikli <GNUtoo at cyberdimension.org>:
> Hi,
> I've looked on the wiki[1] to understand the changes between the
> revisions.
> As I understand, we have the following revisions:
> - A2: Beagleboard based?

More precise:

- A1: Beagleboard based?
- A2: first prototype (just 2 units with OMAP3530 built - did not work well, but was good for learning)

> - A3:
>  512M of RAM
>  no hardware routing between the modem and the CODEC


> - A4:
>  512M of RAM
>  hardware routing between the modem and the SOC

yes. Some have 512MB NAND and some 1GB NAND but all have 512MB RAM.

> The linux kernel has two A5 revisions in arch/arm/boot/dts/:
> - omap3-gta04a5.dts
> - omap3-gta04a5one.dts: the ONENAND version of the A5
> However they don't have any indication of the amount of RAM.

RAM is initialized by u-boot and it changes the DTB after loading
so that the kernel knows the real RAM size.

There was one prototype built with the same 512MB RAM + 1GB NAND and
that is what the omap3-gta04a5.dts is good for. It also contains
all other changes (sensors, wiring etc.).

omap3-gta04a5one.dts is indeed for the 1GB RAM + 512MB OneNAND
and just reconfigures the OneNAND interface. This is the chip
we purchased together with the Neo900 project. It seems to be
the same as the N9 has.

This chip is installed on all GTA04A5 which have been delivered.

> - The wiki FeatureList[1] page seem to indicate that there is only 512M
>  as '1G' of RAM is not mentioned on the page
> - u-boot sources seem to indicate that there may be 1G on some
>  versions[2]
> Do versions with 1G of RAM exist? If so were they sold to people? How
> many of such devices were sold?

Unfortunately, just a handful (I still have the plan to try to repair
the broken boards, but it is on low low priority and high high risk...)
But you can assume for sure that any A3/A4 has 512MB RAM and A5 has

Hope this helps.

> References:
> -----------
> [1]https://projects.goldelico.com/p/gta04-main/page/FeatureList/
> [2]https://git.goldelico.com/?p=letux-uboot.git;a=blob;f=board/goldelico/letux-gta04/gta04.c;h=258b2be62904d98639a9a92afc2ede793685eb4c;hb=refs/heads/master#l228
> Denis.


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