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This initial port adds support of ARC HS Development Kit board with some
basic features such serial port, USB, SD/MMC and Ethernet.
Essentially we run Linux kernel on all 4 cores (i.e. utilize SMP) and
heavily use IO Coherency for speeding-up DMA-aware peripherals.
Note as opposed to other ARC boards we link Linux kernel to
0x9000_0000 intentionally because cores 1 and 3 configured with DCCM
situated at our more usual link base 0x8000_0000. We still can use
memory region starting at 0x8000_0000 as we reallocate DCCM in our
platform code.
Note that PAE remapping for DMA clients does not work due to an RTL bug,
so CREG_PAE register must be programmed to all zeroes, otherwise it will
cause problems with DMA to/from peripherals even if PAE40 is not used.
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Alexey Brodkin <[email protected]>
Signed-off-by: Eugeniy Paltsev <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>
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Add EZchip to vendor prefixes list.
EZchip introduce the NPS platform for the ARC architecture.
Signed-off-by: Noam Camus <[email protected]>
Acked-by: Rob Herring <[email protected]>
Cc: Pawel Moll <[email protected]>
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Signed-off-by: Eric Engestrom <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>
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Move various interrupt controller bindings into the
interrupt-controller/ directory.
Signed-off-by: Rob Herring <[email protected]>
Cc: Matthias Brugger <[email protected]>
Cc: [email protected]
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With all features in place, the ARC HS pct block can now be effectively
allowed to be probed/used
Acked-by: Peter Zijlstra <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Alexey Brodkin <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>
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Cc: Grant Likely <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: [email protected]
Signed-off-by: Vineet Gupta <[email protected]>
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Cc: Jason Cooper <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>
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Cc: Jason Cooper <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>
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Earlycon calculates UART clock as "BASE_BAUD * 16". In case of ARC
"BASE_BAUD" is calculated dynamically in runtime, basically it is an
alias to arc_early_base_baud(), which in turn just does
"arc_base_baud/16".
8250 UART on AXS/SDP board uses 33.3MHz clock source which is set in
"arc_base_baud" with this change.
Additional compatibility string "snps,arc-sdp" is introduced as well
because there're different flavours of AXS boards but they all share the
same motherboard and so it's possible to re-use the same code for
motherbord even if CPU daughterboard changes.
Signed-off-by: Vineet Gupta <[email protected]>
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The AXS10x platforms consist of a mainboard with peripherals,
on which several daughter cards can be placed. The daughter cards
typically contain a CPU and memory.
Signed-off-by: Mischa Jonker <[email protected]>
Signed-off-by: Alexey Brodkin <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>
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Signed-off-by: Vineet Gupta <[email protected]>
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Signed-off-by: Mischa Jonker <[email protected]>
Acked-by: Mark Rutland <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>
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* arc-uart platform device now populated dynamically, using
of_platform_populate() - applies to any other device whatsoever.
* uart in turn requires incore arc-intc to be also present in DT
* A irq-domain needs to be instantiated for IRQ requests by DT probed
device (e.g. arc-uart)
TODO: switch over to linear irq domain once all devs have been
transitioned to DT
Signed-off-by: Vineet Gupta <[email protected]>
Cc: Grant Likely <[email protected]>
Cc: Arnd Bergmann <[email protected]>
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