Devicetree gpu entry for Mali400-MP4 embedded in Exynos4412 Prime SoC'S

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Hi,

while using the mainline kernel on my Odroid U3+ for a while, I tried
to make it working with the latest ARM Mali driver supported by my
vendor (Hardkernel), which is r5p0.
I found a pdf document on the net for the Exynos4412 and also took a
look at the dt entry by Tobias Jakobi, who has got a individual dt
implementation for an older (r4p0) mali driver.
But I ended with error messages at driver initialization, so added a
question at community.com [1] to understand the reason and they said
that there is a lot wrong in the dt entry. So I assume that there are
much differences between Exynos4412 and Exynos4412 Prime (?).

Additionally: Is it possible to merge dtb files? Just in case I have
an installation with a kernel + dtb's preinstalled, is it possible to
cat the missing gpu@ entry from a seperate dtb? Or better: Are you
planning to add the missing gpu@ entries? I know Greg Kroah-Hartman
made a statement in the past about the mali driver, but as the device
trees just have to describe the hardware layout it shouldn't be a
problem adding these entries, isn't it?

Regards

[1] https://community.arm.com/thread/9145
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