The A20 has EMAC and GMAC muxed on the same pins.
Add pin sets with gmac function for MII and RGMII mode to the DTSI.

Signed-off-by: Chen-Yu Tsai <w...@csie.org>
---
 arch/arm/boot/dts/sun7i-a20.dtsi | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
index 8eb4d54..68c889c 100644
--- a/arch/arm/boot/dts/sun7i-a20.dtsi
+++ b/arch/arm/boot/dts/sun7i-a20.dtsi
@@ -484,6 +484,32 @@
                                allwinner,drive = <0>;
                                allwinner,pull = <0>;
                        };
+
+                       gmac_pins_mii_a: gmac_mii@0 {
+                               allwinner,pins = "PA0", "PA1", "PA2",
+                                               "PA3", "PA4", "PA5", "PA6",
+                                               "PA7", "PA8", "PA9", "PA10",
+                                               "PA11", "PA12", "PA13", "PA14",
+                                               "PA15", "PA16";
+                               allwinner,function = "gmac";
+                               allwinner,drive = <0>;
+                               allwinner,pull = <0>;
+                       };
+
+                       gmac_pins_rgmii_a: gmac_rgmii@0 {
+                               allwinner,pins = "PA0", "PA1", "PA2",
+                                               "PA3", "PA4", "PA5", "PA6",
+                                               "PA7", "PA8", "PA10",
+                                               "PA11", "PA12", "PA13",
+                                               "PA15", "PA16";
+                               allwinner,function = "gmac";
+                               /*
+                                * data lines in RGMII mode use DDR mode
+                                * and need a higher signal drive strength
+                                */
+                               allwinner,drive = <3>;
+                               allwinner,pull = <0>;
+                       };
                };
 
                timer@01c20c00 {
-- 
1.9.rc1

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