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@xxxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxxx> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev-HKixBCOQz3hWk0Htik3J/w@xxxxxxxxxxxxxxxx> --- 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 fixesAcked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@xxxxxxxxxxxxxxxx>+ 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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
