On 06/12/2016 11:31 AM, Martin Michlmayr wrote:
* Shreshtha <shreshthakumar@xxxxxxxxx> [2016-06-12 17:15]:
I noticed that the Jetson TK1 hangs during boot (when/before mounting
the SD disk) when CONFIG_ARM_TEGRA_DEVFREQ=y is set and when u-boot
from R21.4 is used (2014.10-rc2).
I cannot find CONFIG_ARM_TEGRA_DEVFREQ in r21.4 codeline. With default
"tegra12_defconfig", CONFIG_PM_DEVFREQ is getting enabled.
Can you please share some more details about CONFIG_ARM_TEGRA_DEVFREQ, which
file it complies and if it is really present in code or pulled from other git.
Sorry for not being clear. I'm talking about the mainline kernel from
kernel.org:
drivers/devfreq/Makefile:obj-$(CONFIG_ARM_TEGRA_DEVFREQ) += tegra-devfreq.o
Booting a mainline kernel with tegra-devfreq enabled will hang my machine
during bootup when I use the u-boot from R21.4 (which I believe is the
latest provided by NVIDIA).
Note that if you're booting a mainline kernel, there's no need to use
the L4T U-Boot release; a mainline U-Boot release should work just fine.
Or put another way, the "latest provided by NVIDIA" is actually mainline
U-Boot, unless you need to boot a downstream L4T kernel which has some
downstream-specific requirements.
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