Hi Rob,
On 07/17/2017 10:38 AM, Rob Herring wrote:
On Wed, Jul 12, 2017 at 12:40:23PM +0300, Eugeniy Paltsev wrote:
From: Alexey Brodkin <abrodkin-HKixBCOQz3hWk0Htik3J/w...@public.gmane.org>
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-HKixBCOQz3hWk0Htik3J/w...@public.gmane.org>
Signed-off-by: Eugeniy Paltsev
<Eugeniy.Paltsev-HKixBCOQz3hWk0Htik3J/w...@public.gmane.org>
---
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-dgejt+ai2ygdnm+yrof...@public.gmane.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.
Are these v1 suffixes really needed. We don't envision any change to usb IP even
if we were to ever do a respin of the board !
Thx,
-Vineet
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