Messages in this thread | | | Date | Mon, 17 Jul 2017 12:38:23 -0500 | From | Rob Herring <> | Subject | Re: [PATCH 3/3 v8] ARC: hsdk: initial port for HSDK board |
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On Wed, Jul 12, 2017 at 12:40:23PM +0300, Eugeniy Paltsev wrote: > From: Alexey Brodkin <abrodkin@synopsys.com> > > 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. > > Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> > Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> > --- > Changes v7 -> v8: > * DTS: move cpu_intc, idu_intc, arcpct, timer, gfrc nodes to root > level and out of the cpus node. > * DTS: add vendor-specific compatible for ohci and ehci nodes. > * DTS: style fixes
Acked-by: Rob Herring <robh@kernel.org>
> + ohci@60000 { > + compatible = "snps,hsdk-v1.0-ohci", "generic-ohci"; > + reg = <0x60000 0x100>; > + interrupts = <15>; > + }; > + > + ehci@40000 { > + compatible = "snps,hsdk-v1.0-ehci", "generic-ehci"; > + reg = <0x40000 0x100>; > + interrupts = <15>; > + };
Of course, now these compatibles need to be documented. You can do that in a separate follow-up patch.
Rob
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