On 06/14/2011 06:31 PM, Fabio Estevam wrote:
MX31 Reference Manual states the following possible values for the silicon revision:
Hi Fabio,
However it is possible to find some pre-production silicon on some old hardware, such as MX31ADS that shows srev = 0x20.
The following message is the currently displayed on such MX31ADS board:
CPU: Freescale i.MX31 rev 2.0 unknown at 531 MHz.Reset cause: WDOG
With this patch we see a better message like:
CPU: Freescale i.MX31 rev 0.0 (unknown revision) at 531 MHz.Reset cause: WDOG
Why is the new output better as we have now ? You drop the output of the srev register, and then we cannot get which strange silicon version is running without patching the code.
if (srev == mx31_cpu_type[i].srev) return mx31_cpu_type[i].v;
- return srev | 0x8000;
- return 0x8000;
IMHO in the case the revision is not recognized, it is better to print the value of the srev register, as it is done now. This can be a useful information and printing a fixed "0.0" version does not say anything about the processor.
Best regards, Stefano Babic