With OMAP3530 on BeagleBoard we like to read OMAP3's
CONTROL_RAND_KEY_0 (0x4800 2318) register with something like
printf ("attempting cpu_uid read\n");
u32 cpu_uid = *((u32 *) 0x48002318);
/* u32 cpu_uid = readl(&ctrl_base->randkey_0); */
printf ("cpu_uid read done\n");
This does hang after first printf, second printf is never printed.
Both, the direct register access and the readl style doesn't work.
Access to other system control module register in the same address
range works fine, though.
Any idea or hint?
For details see spruf98b.pdf page 960 and
http://www.sakoman.net/cgi-bin/gitweb.cgi?p=u-boot-omap3.git;a=blobdiff;f=cpu/arm_cortexa8/omap3/sys_info.c;h=347e8ba24b03d5a4c3a37878cf6fc9f6868066c7;hp=67955531f3f0782b2f3f7e587472e0bef08c921c;hb=292a36ca0271c4a93196f4efd118640b11a65482;hpb=0b043b4ac2144a517d2a5d24ffff7c957b9178f7
Yes, this isn't Linux, but for U-Boot. But as a lot OMAP experts are
here and same might happen if reading this registers from Linux, we'd
like to ask here.
Thanks
Dirk
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