i.MX ProcessorsのトピックiMX6 - GPT - linux kernel 3.2.26 not start

iMX6 - GPT - linux kernel 3.2.26 not start

wendi — Thu, 04 Sep 2014 02:19:53 GMT

Hi everybody

recently I'm trying to run linux 3.2.26 on board ,but it hangs at

[

0.000183] Calibrating delay loop...

GPT may set incorrectly

so I print the message of GPT registers

[			0.000000] start_kernel: Control Register 0x749
[			0.000000] start_kernel: Prescaler Register 0x7000
[			0.000000] start_kernel: Status Register 0x0
[			0.000000] start_kernel: Interrupt Register 0x1
[			0.000000] start_kernel: Output Compare Register 1 0xEB348
[			0.000000] start_kernel: Output Compare Register 2 0xFFFFFFFF
[			0.000000] start_kernel: Output Compare Register 3 0xFFFFFFFF
[			0.000000] start_kernel: Input Capture Register 1 0x0
[			0.000000] start_kernel: Input Capture Register 2 0x0
[			0.000000] start_kernel: Counter Register 0x148B9

set the GPT Interrupt Register (GPT_IR) Output Compare Channel 1 interrupt is enabled

the Status Register value should be 0x1 ,but it still 0x0 .

if I set the same value on linux 3.0.35 it can run coorectly

the same clock src and Interrupt Register set why course the different appearance?

What can I do to make the kernel run corrrectly ?

THANK YOU !

Re: iMX6 - GPT - linux kernel 3.2.26 not start

fabio_estevam — Thu, 04 Sep 2014 03:08:19 GMT

I would suggest you to run 3.16.1 instead.

Re: iMX6 - GPT - linux kernel 3.2.26 not start

wendi — Thu, 04 Sep 2014 07:56:52 GMT

thank you for your answer .I'll try that ,but I want to know how to solve this problem!

Re: iMX6 - GPT - linux kernel 3.2.26 not start

fabio_estevam — Thu, 04 Sep 2014 15:57:31 GMT

I haven't seen such error before. Could you also try it on a FSL board?

Re: iMX6 - GPT - linux kernel 3.2.26 not start

wendi — Fri, 05 Sep 2014 05:49:50 GMT

I'm sorry that I don't have such board .I find that to run timer correctly it need two conditions one is right clock src ,the other is low power modes or debug modes .I think the modes set error may cause the timer not run