linux porting

[saida]

hi

I have a customized imxdl hardware board where extra devices are added and pin muxing also different  from sabresd board

i am able to port u-boot,linux kernel and rootfile system with sabresd board which i purchased

in my custom board i am using uart3 and i chaned it in u-boot UART3_BASE ans CONSOLE is ttymxc2

so u-boot is working but kernel is not booting (i am using imx6dl-sabresd.dtb file for kernel booting which is in kernel)

it is stopping at 'Starting Kernel'

no further console messages

what could be the problem

thanks and regards

saida

[jingyangxie]

Hi,Saida S

     Have you configed the gpio for uart3 correctly in the dts?if so ,you can do the test(communicate with the PC by read/write the uart)

[saida]

Thank you for your replay

I changed gpio pins for UART 3 in dtsi file and it is updated in dtb file after build also

But still it's not working. Where this UART 3 initialized in Linux ? I am debugging through source code also , if you have any clues plZ share it i will try and come back to you 

Thank you very much

Regards 

Saida

[jingyangxie]

the whole uarts will be initialized when enabled in dts.for imx,the uart driver is in /driver/tty/serial/imx.c.you can refer the file for details.or can you give the start massage of your board?I want to know more details.

[saida]

Ok i will send it to you soon

Byee 

[b36401]

You need to update u-boot options with new console and make sure that Linux kernel itself supports it.

Have a great day,
Victor

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