ar71xx: add kernel support for TPLINK WR720N v3

Add support for TPLINK WR720N v3 which has 4MB flash,
32MB ram, 2 ethernet interfaces, 1 USB 2.0 port.

The patch is mostly a modification from mach-tl-wr703n.c.
GPIO numbers for the slider switch is from mach-tl-mr3020n.c.

Tested on my device and they worked fine.

Signed-off-by: yousong <yszhou4tech@gmail.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 36456

target/linux/ar71xx/config-3.8

@@ -72,6 +72,7 @@ CONFIG_ATH79_MACH_TL_WR1041N_V2=y
 CONFIG_ATH79_MACH_TL_WR1043ND=y
 CONFIG_ATH79_MACH_TL_WR2543N=y
 CONFIG_ATH79_MACH_TL_WR703N=y
+CONFIG_ATH79_MACH_TL_WR720N_V3=y
 CONFIG_ATH79_MACH_TL_WR741ND=y
 CONFIG_ATH79_MACH_TL_WR741ND_V4=y
 CONFIG_ATH79_MACH_TL_WR841N_V1=y

target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr720n-v3.c

@@ -0,0 +1,109 @@
+/*
+ *  TP-LINK TL-WR720N board support
+ *
+ *  Copyright (C) 2011 dongyuqi <729650915@qq.com>
+ *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2013 yousong <yszhou4tech@gmail.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+
+#include <linux/gpio.h>
+
+#include <asm/mach-ath79/ath79.h>
+
+#include "dev-eth.h"
+#include "dev-gpio-buttons.h"
+#include "dev-leds-gpio.h"
+#include "dev-m25p80.h"
+#include "dev-usb.h"
+#include "dev-wmac.h"
+#include "machtypes.h"
+
+#define TL_WR720N_GPIO_LED_SYSTEM	27
+#define TL_WR720N_GPIO_BTN_RESET	11
+#define TL_WR720N_GPIO_BTN_SW1		18
+#define TL_WR720N_GPIO_BTN_SW2		20
+
+#define TL_WR720N_GPIO_USB_POWER	8
+
+#define TL_WR720N_KEYS_POLL_INTERVAL	20	/* msecs */
+#define TL_WR720N_KEYS_DEBOUNCE_INTERVAL	(3 * TL_WR720N_KEYS_POLL_INTERVAL)
+
+static const char *tl_wr720n_part_probes[] = {
+	"tp-link",
+	NULL,
+};
+
+static struct flash_platform_data tl_wr720n_flash_data = {
+	.part_probes	= tl_wr720n_part_probes,
+};
+
+static struct gpio_led tl_wr720n_leds_gpio[] __initdata = {
+	{
+		.name		= "tp-link:blue:system",
+		.gpio		= TL_WR720N_GPIO_LED_SYSTEM,
+		.active_low	= 1,
+	},
+};
+
+static struct gpio_keys_button tl_wr720n_gpio_keys[] __initdata = {
+	{
+		.desc		= "reset",
+		.type		= EV_KEY,
+		.code		= KEY_RESTART,
+		.debounce_interval = TL_WR720N_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_WR720N_GPIO_BTN_RESET,
+		.active_low	= 0,
+	}, {
+		.desc		= "sw1",
+		.type		= EV_KEY,
+		.code		= BTN_0,
+		.debounce_interval = TL_WR720N_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_WR720N_GPIO_BTN_SW1,
+		.active_low = 0,
+	}, {
+		.desc		= "sw2",
+		.type		= EV_KEY,
+		.code		= BTN_1,
+		.debounce_interval = TL_WR720N_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_WR720N_GPIO_BTN_SW2,
+		.active_low = 0,
+	}
+};
+
+static void __init tl_wr720n_v3_setup(void)
+{
+	u8 *mac = (u8 *) KSEG1ADDR(0x1f01fc00);
+	u8 *ee = (u8 *) KSEG1ADDR(0x1fff1000);
+
+	/* disable PHY_SWAP and PHY_ADDR_SWAP bits */
+	ath79_setup_ar933x_phy4_switch(false, false);
+
+	ath79_register_m25p80(&tl_wr720n_flash_data);
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(tl_wr720n_leds_gpio),
+					tl_wr720n_leds_gpio);
+	ath79_register_gpio_keys_polled(-1, TL_WR720N_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(tl_wr720n_gpio_keys),
+					tl_wr720n_gpio_keys);
+
+	gpio_request_one(TL_WR720N_GPIO_USB_POWER,
+			GPIOF_OUT_INIT_HIGH | GPIOF_EXPORT_DIR_FIXED,
+			"USB power");
+	ath79_register_usb();
+
+	ath79_init_mac(ath79_eth0_data.mac_addr, mac, 1);
+	ath79_init_mac(ath79_eth1_data.mac_addr, mac, 2);
+
+	ath79_register_mdio(0, 0x0);
+	ath79_register_eth(0);
+	ath79_register_eth(1);
+
+	ath79_register_wmac(ee, mac);
+}
+
+MIPS_MACHINE(ATH79_MACH_TL_WR720N_V3, "TL-WR720N-v3", "TP-LINK TL-WR720N v3",
+		tl_wr720n_v3_setup);
+

target/linux/ar71xx/patches-3.8/617-MIPS-ath79-TL-WR720N-v3-support.patch

@@ -0,0 +1,39 @@
+--- a/arch/mips/ath79/machtypes.h
++++ b/arch/mips/ath79/machtypes.h
+@@ -94,6 +94,7 @@ enum ath79_mach_type {
+ 	ATH79_MACH_TL_WR1043ND,		/* TP-LINK TL-WR1043ND */
+ 	ATH79_MACH_TL_WR2543N,		/* TP-LINK TL-WR2543N/ND */
+ 	ATH79_MACH_TL_WR703N,		/* TP-LINK TL-WR703N */
++	ATH79_MACH_TL_WR720N_V3,	/* TP-LINK TL-WR720N v3 */
+ 	ATH79_MACH_TL_WR741ND,		/* TP-LINK TL-WR741ND */
+ 	ATH79_MACH_TL_WR741ND_V4,	/* TP-LINK TL-WR741ND  v4*/
+ 	ATH79_MACH_TL_WR841N_V1,	/* TP-LINK TL-WR841N v1 */
+--- a/arch/mips/ath79/Kconfig
++++ b/arch/mips/ath79/Kconfig
+@@ -556,6 +556,16 @@ config ATH79_MACH_TL_WR703N
+ 	select ATH79_DEV_USB
+ 	select ATH79_DEV_WMAC
+ 
++config ATH79_MACH_TL_WR720N_V3
++	bool "TP-LINK TL-WR720N v3 support"
++	select SOC_AR933X
++	select ATH79_DEV_ETH
++	select ATH79_DEV_GPIO_BUTTONS
++	select ATH79_DEV_LEDS_GPIO
++	select ATH79_DEV_M25P80
++	select ATH79_DEV_USB
++	select ATH79_DEV_WMAC
++
+ config ATH79_MACH_TL_WR741ND
+ 	bool "TP-LINK TL-WR741ND support"
+ 	select SOC_AR724X
+--- a/arch/mips/ath79/Makefile
++++ b/arch/mips/ath79/Makefile
+@@ -93,6 +93,7 @@ obj-$(CONFIG_ATH79_MACH_TL_WR1041N_V2)	+
+ obj-$(CONFIG_ATH79_MACH_TL_WR1043ND)	+= mach-tl-wr1043nd.o
+ obj-$(CONFIG_ATH79_MACH_TL_WR2543N)	+= mach-tl-wr2543n.o
+ obj-$(CONFIG_ATH79_MACH_TL_WR703N)	+= mach-tl-wr703n.o
++obj-$(CONFIG_ATH79_MACH_TL_WR720N_V3)	+= mach-tl-wr720n-v3.o
+ obj-$(CONFIG_ATH79_MACH_UBNT)		+= mach-ubnt.o
+ obj-$(CONFIG_ATH79_MACH_UBNT_XM)	+= mach-ubnt-xm.o
+ obj-$(CONFIG_ATH79_MACH_WHR_HP_G300N)	+= mach-whr-hp-g300n.o