Re: dtb for pandaboard

[Dennis Gilmore <dgilmore@xxxxxxxxxxxxxxxxx>]

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On Tue, 10 Jul 2012 18:11:19 -0500
Dennis Gilmore <dennis@xxxxxxxx> wrote:

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> On Mon, 9 Jul 2012 02:08:49 -0700
> Tony Lindgren <tony@xxxxxxxxxxx> wrote:
> 
> > * Dennis Gilmore <dennis@xxxxxxxx> [120708 16:11]:
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> > > Hi does anyone happen to have a working dtb file for the
> > > pandaboard? trying to test booting the fedora rawhide kernel
> > > which is 3.5.0-rc5 with a dtb file I made from the matching
> > > sources I dont get past decompressing the kernel. if i dont use a
> > > dtb file the system boots further but it i'm unable to find the
> > > root filesystem since it seems that the platform data has been
> > > messed up. modprobing omap results in no registration of the mmc
> > > block devices. 
> > > 
> > > i've not tested on a pandaboard ES or beagleboard yet  or any
> > > other type of omap system. 
> > 
> > FYI, I booted my panda es recently just fine with dtb append support
> > and the following .config addition using the plain
> > arch/arm/boot/dts/omap4-panda.dts file:
> > 
> > CONFIG_ARM_APPENDED_DTB=y
> > CONFIG_ARM_ATAG_DTB_COMPAT=y
> > CONFIG_EXT4_FS=y
> > 
> > Can you please enable DEBUG_LL, EARLY_PRINTK and add earlyprintk to
> > your cmdline and post what you get?
> > 
> > Regards,
> > 
> > Tony
> 
> Loaded environment from uEnv.txt
> Importing environment from mmc ...
> reading uImage-omap
> 
> 3988040 bytes read
> reading uInitrd-omap
> 
> 1190 bytes read
> reading omap4-panda.dtb
> 
> 5483 bytes read
> Booting from mmc ...
> ## Booting kernel from Legacy Image at 80300000 ...
>    Image Name:   3.5.0-0.rc6.git0.3.fc18.armv7hl.
>    Image Type:   ARM Linux Kernel Image (uncompressed)
>    Data Size:    3987976 Bytes = 3.8 MiB
>    Load Address: 80008000
>    Entry Point:  80008000
>    Verifying Checksum ... OK
> ## Loading init Ramdisk from Legacy Image at 81600000 ...
>    Image Name:   initramfs
>    Image Type:   ARM Linux RAMDisk Image (uncompressed)
>    Data Size:    1126 Bytes = 1.1 KiB
>    Load Address: 00000000
>    Entry Point:  00000000
>    Verifying Checksum ... OK
> ## Flattened Device Tree blob at 82600000
>    Booting using the fdt blob at 0x82600000
>    Loading Kernel Image ... OK
> OK
>    reserving fdt memory region: addr=9d000000 size=3000000
>    Loading Ramdisk to bfefa000, end bfefa466 ... OK
>    Loading Device Tree to bfef5000, end bfef956a ... OK
> 
> Starting kernel ...
> 
> Uncompressing Linux... done, booting the kernel.
> Warning: Neither atags nor dtb found
> 
> is as far as i am getting.
> 
> Dennis
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booting without using the dtb file i get

[    2.774627] ===============================
[    2.774658] [ INFO: suspicious RCU usage. ]
[    2.774658] 3.5.0-0.rc6.git0.3.fc18.armv7hl.omap #1 Not tainted
[    2.774658] -------------------------------
[    2.774658] drivers/base/power/opp.c:154 suspicious rcu_dereference_check() usage!
[    2.774658]
[    2.774658] other info that might help us debug this:
[    2.774658]
[    2.774658]
[    2.774658] rcu_scheduler_active = 1, debug_locks = 0
[    2.774658] 3 locks held by kworker/0:0/4:
[    2.774719]  #1:
[    2.774719]  (
[    2.774719] (&(&dbs_info->work)->work)
[    2.774719] ){+.+...}
[    2.774719] , at:
[    2.774719] [<c005bee4>] process_one_work+0x1e8/0x68c
[    2.774719]  #2:
[    2.774719]  (
[    2.774749] &this_dbs_info->timer_mutex
[    2.774749] ){+.+...}
[    2.774749] , at:
[    2.774749] [<c03d3a68>] do_dbs_timer+0x34/0x438
[    2.774749]
[    2.774749] stack backtrace:
[    2.774810] [<c0016790>] (unwind_backtrace+0x0/0x124) from [<c0310640>] (opp_get_voltage+0x80/0xd0)
[    2.774810] [<c0310640>] (opp_get_voltage+0x80/0xd0) from [<c03d5348>] (omap_target+0x180/0x470)
[    2.774841] [<c03d5348>] (omap_target+0x180/0x470) from [<c03cffb0>] (__cpufreq_driver_target+0xa0/0xc8)
[    2.774841] [<c03cffb0>] (__cpufreq_driver_target+0xa0/0xc8) from [<c03d3db4>] (do_dbs_timer+0x380/0x438)
[    2.774871] [<c03d3db4>] (do_dbs_timer+0x380/0x438) from [<c005c02c>] (process_one_work+0x330/0x68c)
[    2.774871] [<c005c02c>] (process_one_work+0x330/0x68c) from [<c005c55c>] (worker_thread+0x1a0/0x2c0)
[    2.774871] [<c005c55c>] (worker_thread+0x1a0/0x2c0) from [<c006257c>] (kthread+0x98/0xac)
[    2.774902] [<c006257c>] (kthread+0x98/0xac) from [<c000f714>] (kernel_thread_exit+0x0/0x8)
[    2.774932] voltdm_scale: No voltage scale API registered for vdd_mpu
[    2.774932] platform mpu.0: omap_target: unable to scale voltage up.
[    2.774688]  #0:  (events){.+.+..}, at: [<c005bee4>] process_one_work+0x1e8/0x68c


Dennis
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