[Letux-kernel] SGX530/540/544 integration and reset-controller
H. Nikolaus Schaller
hns at goldelico.com
Thu Nov 3 10:00:53 CET 2016
I have some progress but no breakthrough.
using of_reset_control_get_shared() makes the driver
initialize and make the OMAP3 kernel no longer panic
during boot (have not tried on OMAP5).
There is still a -EBUSY issue in reset_control_deassert
so that the resets are not really done.
2. reset-controller + SGX530/40 driver
a) compile error (missing __get_user_pages)
MM API suggests to use one of the other more specific
The one that has the most comparable parameter list
is get_user_pages_remote() and with that we get the
sgx530 code compiled.
What I am not at all sure about is what "remote" means
and if it is the right thing to do.
b) locating the SGX reset controller
Although I have added a "gpu" node to omap3.dtsi the new
reset controller is still not found.
That has likely its reason in that there is no
ti,hwmods = "gpu" like Jonathan has added for the SGX544.
We probably have to add something similar to omap3/4
c) clock setup
And what we are most likely completely missing is clock
setup for the SGX530.
here is the latest merged tree with SGX530/540 and 544
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