ARC: [plat-axs*/plat-hsdk]: Allow U-Boot to pass MAC-address to the kernel

Otherwise kernel uses random MAC which is not very conveniet.
With that change in place use might set desired MAC in U-Boot
with "setenv ethaddr 11:22:33:44:55:66", save environment and
then from boot to boot the same MAC will be used by the kernel.

One other note for this to happen it's required to pass
board's .dtb in U-Boot's "bootm" command like that:
------------------->8-----------------
bootm 0x82000000 - 0x84000000
------------------->8-----------------

Here 0x82000000 is location of uImage while
0x80000000 is location of either axs10x.dtb or hsdk.dtb
previously loaded from SD-card, USB storage or TFTP server.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: stable@vger.kernel.org # 4.14
Cc: devicetree@vger.kernel.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

diff --git a/arch/arc/boot/dts/axs10x_mb.dtsi b/arch/arc/boot/dts/axs10x_mb.dtsi
index 47b74fbc403c21cc2f493f6f84d6216b7c5ef5c1..37bafd44e36d0fed9b85e80ea356cd78df0c1872 100644 (file)
--- a/arch/arc/boot/dts/axs10x_mb.dtsi
+++ b/arch/arc/boot/dts/axs10x_mb.dtsi
@@ -9,6 +9,10 @@
  */
 
 / {
+       aliases {
+               ethernet = &gmac;
+       };
+
        axs10x_mb {
                compatible = "simple-bus";
                #address-cells = <1>;
@@ -68,7 +72,7 @@
                        };
                };
 
-               ethernet@0x18000 {
+               gmac: ethernet@0x18000 {
                        #interrupt-cells = <1>;
                        compatible = "snps,dwmac";
                        reg = < 0x18000 0x2000 >;
@@ -81,6 +85,7 @@
                        max-speed = <100>;
                        resets = <&creg_rst 5>;
                        reset-names = "stmmaceth";
+                       mac-address = [00 00 00 00 00 00]; /* Filled in by U-Boot */
                };
 
                ehci@0x40000 {

diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index 006aa3de5348f31c7462f52f173ad2e74434d062..d00f283094d312a7a3db5072aa5c645f52c978f1 100644 (file)
--- a/arch/arc/boot/dts/hsdk.dts
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -25,6 +25,10 @@
                bootargs = "earlycon=uart8250,mmio32,0xf0005000,115200n8 console=ttyS0,115200n8 debug print-fatal-signals=1";
        };
 
+       aliases {
+               ethernet = &gmac;
+       };
+
        cpus {
                #address-cells = <1>;
                #size-cells = <0>;
@@ -163,7 +167,7 @@
                        #clock-cells = <0>;
                };
 
-               ethernet@8000 {
+               gmac: ethernet@8000 {
                        #interrupt-cells = <1>;
                        compatible = "snps,dwmac";
                        reg = <0x8000 0x2000>;
@@ -176,6 +180,7 @@
                        phy-handle = <&phy0>;
                        resets = <&cgu_rst HSDK_ETH_RESET>;
                        reset-names = "stmmaceth";
+                       mac-address = [00 00 00 00 00 00]; /* Filled in by U-Boot */
 
                        mdio {
                                #address-cells = <1>;