DW ethernet controller on HSDK hangs sometimes after SW reset, so
add reset node to make possible to reset DW ethernet controller HW.

Signed-off-by: Eugeniy Paltsev <eugeniy.palt...@synopsys.com>
---
NOTE: this patch is effective only if patches to DW ethernet controller
      and reset controller are applied (they are already in linux-next)

 arch/arc/boot/dts/hsdk.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index e096879..84052db 100644
--- a/arch/arc/boot/dts/hsdk.dts
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -12,6 +12,7 @@
 /dts-v1/;
 
 #include <dt-bindings/net/ti-dp83867.h>
+#include <dt-bindings/reset/snps,hsdk-v1-reset.h>
 
 / {
        model = "snps,hsdk";
@@ -102,6 +103,12 @@
 
                ranges = <0x00000000 0xf0000000 0x10000000>;
 
+               cgu_rst: reset {
+                       compatible = "snps,hsdk-v1.0-reset";
+                       #reset-cells = <1>;
+                       reg = <0x8A0 0x4>, <0xFF0 0x4>;
+               };
+
                serial: serial@5000 {
                        compatible = "snps,dw-apb-uart";
                        reg = <0x5000 0x100>;
@@ -141,6 +148,8 @@
                        clocks = <&gmacclk>;
                        clock-names = "stmmaceth";
                        phy-handle = <&phy0>;
+                       resets = <&cgu_rst HSDK_V1_ETH_RESET>;
+                       reset-names = "stmmaceth";
 
                        mdio {
                                #address-cells = <1>;
-- 
2.9.3

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