ARC: [plat-hsdk]: Add reset controller node to manage ethernet reset

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.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index b922f3f..8adde1b 100644 (file)
--- 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-reset.h>
 
 / {
        model = "snps,hsdk";
@@ -102,6 +103,12 @@
 
                ranges = <0x00000000 0xf0000000 0x10000000>;
 
+               cgu_rst: reset-controller@8a0 {
+                       compatible = "snps,hsdk-reset";
+                       #reset-cells = <1>;
+                       reg = <0x8A0 0x4>, <0xFF0 0x4>;
+               };
+
                core_clk: core-clk@0 {
                        compatible = "snps,hsdk-core-pll-clock";
                        reg = <0x00 0x10>, <0x14B8 0x4>;
@@ -158,6 +165,8 @@
                        clocks = <&gmacclk>;
                        clock-names = "stmmaceth";
                        phy-handle = <&phy0>;
+                       resets = <&cgu_rst HSDK_ETH_RESET>;
+                       reset-names = "stmmaceth";
 
                        mdio {
                                #address-cells = <1>;

diff --git a/arch/arc/configs/hsdk_defconfig b/arch/arc/configs/hsdk_defconfig
index 7b8f8fa..15f0f6b 100644 (file)
--- a/arch/arc/configs/hsdk_defconfig
+++ b/arch/arc/configs/hsdk_defconfig
@@ -63,6 +63,7 @@ CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_PLTFM=y
 CONFIG_MMC_DW=y
 # CONFIG_IOMMU_SUPPORT is not set
+CONFIG_RESET_HSDK=y
 CONFIG_EXT3_FS=y
 CONFIG_VFAT_FS=y
 CONFIG_TMPFS=y