about I.mx6 Dual and Dual-Lite processors' different

[laufei]

Hi, Freescale

My first project is based on the Sabre SD demo board, and the cpu is Dual.

Now for the cost-down, the cpu is selected from Dual to Dual-lite. The hardware is the same, just cpu different.

On the Dual cpu project, I made a lot work on it about bsp and application.

Now for the Dual-lite cpu, my question is what's the different between Dual and Dual-lite.

Is there a document which describes what I am concern about?

Thank you for your support!

Best Regards

Fe La

[EgleTeam]

Just recompile u-boot for DL: linux is "transparent" for S, DL, D and Q. From the point of view of the hardware: DDR is slower, there's no SATA, only 1 IPU (2 displays), worst GPU and so on. Best regards, Manuel.

[laufei]

Hi, Manuel

Thanks for your reply!

For the u-boot on Dual-lite, I have done it and it worked OK.

1. Are there some documents(hardware or software) on difference of these two processors?

2. From the software side, how much efforts need on the porting from Dual to Dual-lite?

Best Regards

Fe la

[EgleTeam]

Hi Fe La,

1. I don't know if there is some document for software or not. For hardware, if you don't want to read both reference manuals which are very large, you can try with this document (google it): AN4397.

2. I'm not a software specialist but as far as I know you don't need to do any changes: u-boot "passes" the type of processor to linux and linux enables/disables features depending on the type passed by itself. On old linux versions you can see the differences in the file of description of the board. On new versions just have a look on the "dts" files.

Best regards,

Manuel.

[jamesbone]

Thank you for your cooperation to solved this question!

[laufei]

Hi, Manuel

Thanks for the information, I have downloaded the file AN4379, and will read it.

Our system is not linux, but we may read the linux codes as reference.

Next step I will mainly analyze the source codes based on the hardware different between these processors.

Thank you for your suppoert!

Best Regards

Fe la