gemini: Add ethernet to DNS-313 and Wiliboard

This adds an interrim patch for v4.14 based on an
upstream commit to get ethernet working on D-Link DNS-313
(probably also on the Wiliboards)

Signed-off-by: Linus Walleij <[email protected]>

target/linux/gemini/patches-4.14/0034-ARM-dts-Add-ethernet-to-a-bunch-of-platforms.patch

@@ -0,0 +1,123 @@
+From 6d5af7093aea4f18e040e73db2ad99aaa0c0f77e Mon Sep 17 00:00:00 2001
+From: Linus Walleij <[email protected]>
+Date: Sun, 19 Nov 2017 11:04:23 +0100
+Subject: [PATCH] ARM: dts: Add ethernet to a bunch of platforms
+
+These platforms have the PHY defined already so we just
+need to add a single device node to each of them to activate
+the ethernet device.
+
+The PHY skew/delay settings for pin control is known from a
+few vendor trees and old OpenWRT patch sets.
+
+This is a modified version of upstream commit
+95220046a62c00b5afb1aa7c1971989d427db977,
+just dropping the NAS4220B changes.
+
+Signed-off-by: Linus Walleij <[email protected]>
+---
+ arch/arm/boot/dts/gemini-dlink-dns-313.dts | 62 ++++++++++++++++++++++++++++++
+ arch/arm/boot/dts/gemini-wbd222.dts        |  7 ++++
+ 2 files changed, 69 insertions(+)
+
+diff --git a/arch/arm/boot/dts/gemini-dlink-dns-313.dts b/arch/arm/boot/dts/gemini-dlink-dns-313.dts
+index 685719a0b8c0..df46375457b6 100644
+--- a/arch/arm/boot/dts/gemini-dlink-dns-313.dts
++++ b/arch/arm/boot/dts/gemini-dlink-dns-313.dts
+@@ -215,6 +215,56 @@
+ 						groups = "gpio1dgrp";
+ 					};
+ 				};
++				pinctrl-gmii {
++					mux {
++						function = "gmii";
++						groups = "gmii_gmac0_grp";
++					};
++					/*
++					 * In the vendor Linux tree, these values are set for the C3
++					 * version of the SL3512 ASIC with the comment "benson suggest"
++					 */
++					conf0 {
++						pins = "R8 GMAC0 RXDV", "U11 GMAC1 RXDV";
++						skew-delay = <0>;
++					};
++					conf1 {
++						pins = "T8 GMAC0 RXC";
++						skew-delay = <10>;
++					};
++					conf2 {
++						pins = "T11 GMAC1 RXC";
++						skew-delay = <15>;
++					};
++					conf3 {
++						pins = "P8 GMAC0 TXEN", "V11 GMAC1 TXEN";
++						skew-delay = <7>;
++					};
++					conf4 {
++						pins = "V7 GMAC0 TXC", "P10 GMAC1 TXC";
++						skew-delay = <10>;
++					};
++					conf5 {
++						/* The data lines all have default skew */
++						pins = "U8 GMAC0 RXD0", "V8 GMAC0 RXD1",
++						       "P9 GMAC0 RXD2", "R9 GMAC0 RXD3",
++						       "R11 GMAC1 RXD0", "P11 GMAC1 RXD1",
++						       "V12 GMAC1 RXD2", "U12 GMAC1 RXD3",
++						       "R10 GMAC1 TXD0", "T10 GMAC1 TXD1",
++						       "U10 GMAC1 TXD2", "V10 GMAC1 TXD3";
++						skew-delay = <7>;
++					};
++					conf6 {
++						pins = "U7 GMAC0 TXD0", "T7 GMAC0 TXD1",
++						       "R7 GMAC0 TXD2", "P7 GMAC0 TXD3";
++						skew-delay = <5>;
++					};
++					/* Set up drive strength on GMAC0 to 16 mA */
++					conf7 {
++						groups = "gmii_gmac0_grp";
++						drive-strength = <16>;
++					};
++				};
+ 			};
+ 		};
+ 
+@@ -235,6 +285,18 @@
+ 			pinctrl-0 = <&gpio1_default_pins>;
+ 		};
+ 
++		ethernet@60000000 {
++			status = "okay";
++
++			ethernet-port@0 {
++				phy-mode = "rgmii";
++				phy-handle = <&phy0>;
++			};
++			ethernet-port@1 {
++				/* Not used in this platform */
++			};
++		};
++
+ 		ata@63000000 {
+ 			status = "okay";
+ 		};
+diff --git a/arch/arm/boot/dts/gemini-wbd222.dts b/arch/arm/boot/dts/gemini-wbd222.dts
+index 0678d3beb51d..820978d20166 100644
+--- a/arch/arm/boot/dts/gemini-wbd222.dts
++++ b/arch/arm/boot/dts/gemini-wbd222.dts
+@@ -136,6 +136,13 @@
+ 						"gpio0bgrp";
+ 					};
+ 				};
++				pinctrl-gmii {
++					/* This platform use both the ethernet ports */
++					mux {
++						function = "gmii";
++						groups = "gmii_gmac0_grp", "gmii_gmac1_grp";
++					};
++				};
+ 			};
+ 		};
+ 
+-- 
+2.14.3
+