ChanServ changed the topic of #armlinux to: ARM kernel talk [Upstream kernel, find your vendor forums for questions about their kernels] | https://libera.irclog.whitequark.org/armlinux
<marex>
robher: ah so that is where it is, thanks
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<wens>
sboyd: could you take a look and possibly merge my Mediatek clk driver cleanup series? There are a couple other inflight series that would benefit from it, and I think we should figure out which series comes first.
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<mwalle>
i try to boot linux on a at91 based board, but i don't get any output.. so i've enabled LL_DEBUG, but now I'm stuck with what should be in DEBUG_UART_VIRT. I know the physical address (and I see output from the decompressor) but I'm puzzled what the virt address should be
<geertu>
mwalle: which AT91 is it? You can look at the offsets between phys and virt addresses in "git grep DEBUG_AT91 arch/arm/Kconfig.debug"
<javierm>
geertu: awesome patch-set! I'll take a look at this tomorrow
<mraynal>
geertu: hey! I would like your input before getting my ax out
<mraynal>
geertu: on rzn1 there is a nice system controller with a *lot* of different registers (clock, reset, dma, etc)
<mraynal>
geertu: so far the entire area is taken by a clock node in the DT
<mraynal>
but I need eg. to configure DMA there from somewhere else than the clock driver
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<mraynal>
should I create an MFD driver and make the clk provider driver a child?
<javierm>
mraynal: that's what done usually, yes
<javierm>
mraynal: when there's a multi-function device whose register space is shared
<mraynal>
javierm: do we need to reflect this with DT subnodes?
<mraynal>
actually even with subnodes, I am wondering how I should hook up the DMA controller with this area
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<mraynal>
when the peripheral requests a DMA channel, I believe the DMA controller should set one bit in this particular area telling the system controller "this channel is used by this device" (kind of a mux), but exporting such an interface would require a fully custom interface
<javierm>
mraynal: that's a very good question. Some MFD drivers expose the device topology to the DT but others don't
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<sboyd>
wens: sure thing
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