AnsweredAssumed Answered

Stuck on Calibrating delay loop...

Question asked by Tom Li on Oct 19, 2015
Latest reply on Oct 19, 2015 by igorpadykov

I used buildroot to compile kernel for imx6, but stuck on here,

I copied the working linux kernel 3.0.35 config, and use it on kernel 4.2.3, also copied device tree files from 3.0.35 to 4.2.3

after tweaks, got "i.MX timer: unable to get clk".

So questions:

  1. How to modify clock source?
    Can I copy march-mx6 folder(kernel 3.0.35, it includes board-edm_cf_imx6.c) to kernel 4.2.3?
  2. How to set machine ID? I saw kernel give me 3 possible machines, and their IDs are fffffff, which definitely wrong, how to correct them? in dts?



Starting kernel ...

Uncompressing Linux... done, booting the kernel.
Booting Linux on physical CPU 0x0
Initializing cgroup subsys cpuset
Initializing cgroup subsys cpu
Linux version 4.2.3 (tonghua@tonghua-virtual-machine) (gcc version 4.9.2 20140904 (prerelease) (crosstool-NG linaro-1.13.1-4.9-2014.09 - Linaro GCC 4.9-2014.09) ) #4 SMP PREEMPT Sat Oct 17 13:30:22 EDT 2015
CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: Generic DT based system
bootconsole [earlycon0] enabled
Memory policy: Data cache writeback
CPU: All CPU(s) started in SVC mode.
PERCPU: Embedded 11 pages/cpu @9fbe9000 s14656 r8192 d22208 u45056
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048
Kernel command line: console=ttymxc0,115200n8 root=/dev/nfs nfsroot= ip=dhcp earlyprintk clocksource=imx_timer1
PID hash table entries: 2048 (order: 1, 8192 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 510684K/524288K available (6854K kernel code, 250K rwdata, 1208K rodata, 288K init, 411K bss, 13604K reserved, 0K cma-reserved, 0K highmem)
Virtual kernel memory layout:
  vector : 0xffff0000 - 0xffff1000 ( 4 kB)
  fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
  vmalloc : 0xa0800000 - 0xff000000 (1512 MB)
  lowmem : 0x80000000 - 0xa0000000 ( 512 MB)
  pkmap : 0x7fe00000 - 0x80000000 ( 2 MB)
  modules : 0x7f000000 - 0x7fe00000 ( 14 MB)
  .text : 0x80008000 - 0x807e7de4 (8064 kB)
  .init : 0x807e8000 - 0x80830000 ( 288 kB)
  .data : 0x80830000 - 0x8086ea00 ( 251 kB)
  .bss : 0x8086ea00 - 0x808d58fc ( 412 kB)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Preemptible hierarchical RCU implementation.
  Additional per-CPU info printed with stalls.
  Build-time adjustment of leaf fanout to 32.
  RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=1.
RCU: Adjusting geometry for rcu_fanout_leaf=32, nr_cpu_ids=1
NR_IRQS:16 nr_irqs:16 16
clocksource_of_init: no matching clocksources found
sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836475000000ns
Console: colour dummy device 80x30
Calibrating delay loop...



[ 0.000000] i.MX timer: unable to get clk
[ 0.000000] sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836475000000ns
[ 0.000000] Console: colour dummy device 80x30
[ 0.000000] Calibrating delay loop...