ramips: add support for Edimax EW-7476RPC / EW-7478AC

SoC:	MediaTek MT7620a @ 580MHz
RAM:	64M (Winbond W9751G6KB-25)
FLASH:	8MB (Macronix)
WiFi:	SoC-integrated: MediaTek MT7620a bgn
WiFi:	MediaTek MT7612EN nac
GbE:	1x (RTL8211E)
BTN:	WPS - RFKILL/RF 50%/RF 100% toggle
LED:	- Wifi 5g (blue)
	- Wifi 2g (blue)
	- Crossband (green)
	- Power (green)
	- WPS (green)
	- LAN (Green)
UART:	UART is present as Pads with throughholes on the PCB. They are
	located next to the switch for the wifi configuration
	3.3V - RX - GND - TX / 57600-8N1
	3.3V is the square pad

Installation
------------
Update the factory image via the web-interfaces (by default:
192.168.9.2/24).
http://192.168.9.2/index.asp

ramips: add Edimax EW-7478AC

SoC:	MediaTek MT7620a @ 580MHz
RAM:	64M (Winbond W9751G6KB-25)
FLASH:	8MB (Macronix)
WiFi:	SoC-integrated: MediaTek MT7620a bgn
WiFi:	MediaTek MT7612EN nac
GbE:	1x (RTL8211E)
BTN:	WPS - RFKILL/RF 50%/RF 100% toggle
LED:	- Wifi 5g (blue)
	- Wifi 2g (blue)
	- Crossband (green)
	- Power (green)
	- WPS (green)
	- LAN (Green)
UART:	UART is present as Pads with throughholes on the PCB. They are
	located next to the switch for the wifi configuration
	3.3V - RX - GND - TX / 57600-8N1
	3.3V is the square pad

Installation
------------
Update the factory image via the web-interfaces (by default:
http://edimaxext.setup)
Or push wpa button on power on and send firmware via tftp to 192.168.1.6

The EW-7478AC is identical to the EW-7476RPC, except instead of 2 internal
antennas it has 2 external ones.

Signed-off-by: Birger Koblitz <mail@birger-koblitz.de>
[merge conflict in 01_leds]
Signed-off-by: Petr Štetiar <ynezz@true.cz>

1 files changed, 34 insertions, 0 deletions

diff --git a/target/linux/ramips/files-4.14/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/target/linux/ramips/files-4.14/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index b2c3d32c55..65aa7f3260 100644
--- a/target/linux/ramips/files-4.14/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/target/linux/ramips/files-4.14/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -32,6 +32,9 @@
 #include <linux/bug.h>
 #include <linux/netfilter.h>
 #include <net/netfilter/nf_flow_table.h>
+#include <linux/of_gpio.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 
 #include <asm/mach-ralink/ralink_regs.h>
 
@@ -1333,6 +1336,35 @@ static int fe_stop(struct net_device *dev)
 	return 0;
 }
 
+static void fe_reset_phy(struct fe_priv *priv)
+{
+	int err, msec = 30;
+	struct gpio_desc *phy_reset;
+
+	phy_reset = devm_gpiod_get_optional(priv->dev, "phy-reset",
+					    GPIOD_OUT_HIGH);
+	if (!phy_reset)
+		return;
+
+	if (IS_ERR(phy_reset)) {
+		dev_err(priv->dev, "Error acquiring reset gpio pins: %ld\n",
+			PTR_ERR(phy_reset));
+		return;
+	}
+
+	err = of_property_read_u32(priv->dev->of_node, "phy-reset-duration",
+				   &msec);
+	if (!err && msec > 1000)
+		msec = 30;
+
+	if (msec > 20)
+		msleep(msec);
+	else
+		usleep_range(msec * 1000, msec * 1000 + 1000);
+
+	gpiod_set_value(phy_reset, 0);
+}
+
 static int __init fe_init(struct net_device *dev)
 {
 	struct fe_priv *priv = netdev_priv(dev);
@@ -1348,6 +1380,8 @@ static int __init fe_init(struct net_device *dev)
 			return -ENODEV;
 		}
 
+	fe_reset_phy(priv);
+
 	mac_addr = of_get_mac_address(priv->dev->of_node);
 	if (mac_addr)
 		ether_addr_copy(dev->dev_addr, mac_addr);