All Questions
Tagged with device-treeboot
7 questions
1vote
0answers
620views
An rcu_preempt detected stall on Embedded Linux bootup due to USB device tree?
Can anyone point me in the right direction to solve (or at least debug) this rcu_preempt problem I'm experiencing at bootup as shown in the log info below? I think the problem is related to the device ...
1vote
0answers
538views
When is the devicetree parsed to populate the device list on arm64 architecture?
This question comes from my attempts to understand how a built-in platform device driver is initialized at boot time. I am using an embedded linux distro (Yocto) on a SoC (ARM + FPGA). The device ...
- 149
1vote
0answers
155views
Modified kernel module doesn't load on boot- is the old one being cached somewhere
I'm modifying the qca7000 kernel module slightly by adding some debug messages (qcaspi.ko). I compile, run depmod then reboot. However my debug messages do not show up on dmesg. If I rmmod qcaspi then ...
- 145
1vote
0answers
502views
Device-tree blob (DTB) in a separate partition
Currently, I have the device-tree blob (DTB) appended to the Linux kernel. I would like to split the DTB from the kernel to an unique partition containing only the DTB similar to the figure 3 of the ...
2votes
0answers
912views
Change device tree on boot
There is a hardware SPI device on my platform, but it doesn't appear in /dev. I read in internet that the hardware description is read during boor from device tree files (dtb). The problem is that I ...
- 49
1vote
1answer
434views
U-Boot : boot without reloading DTB
I'm using U-Boot on a Raspberry Pi Compute Module. The boot process is : RPi firmware --> U-Boot --> Linux I'm setting up some things about devices in the config.txt, that is used by the RPi firmware....
- 101
2votes
1answer
5kviews
FDT relocated by U-Boot cannot be accessed by Linux (in highmem)
We run a customized version of U-Boot on an ARM-based embedded system and would like to load Linux 4.3 with a device tree blob. The system features 1GB of RAM of which the top 128MB are reserved for ...
