ar71xx: add kernel support for DRAGINO2

This patch adds support for DRAGINO2 board (used by
Meshpotato v2). Most of the files included can be
found in the official svn repository provided by the
company [1]. I have just adapt it to the last OpenWrt
trunk revision (Fri Oct 4 10:49:47 2013).

 1. http://svn.dragino.com/dragino2

Patchwork: http://patchwork.openwrt.org/patch/4234/
Signed-off-by: Pau Escrich <p4u@dabax.net>
[juhosg:
 - rename and refresh kernel patch,
 - fix checkpatch warnings in  mach-dragino2.c]
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 38587

target/linux/ar71xx/config-3.10

@@ -43,6 +43,7 @@ CONFIG_ATH79_MACH_DIR_600_A1=y
 CONFIG_ATH79_MACH_DIR_615_C1=y
 CONFIG_ATH79_MACH_DIR_825_B1=y
 CONFIG_ATH79_MACH_DIR_825_C1=y
+CONFIG_ATH79_MACH_DRAGINO2=y
 CONFIG_ATH79_MACH_EAP7660D=y
 CONFIG_ATH79_MACH_EW_DORIN=y
 CONFIG_ATH79_MACH_HORNET_UB=y

target/linux/ar71xx/files/arch/mips/ath79/mach-dragino2.c

@@ -0,0 +1,127 @@
+/*
+ *  DRAGINO V2 board support, based on Atheros AP121 board support
+ *
+ *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2012 Elektra Wagenrad <elektra@villagetelco.org>
+ *
+ *  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 <asm/mach-ath79/ar71xx_regs.h>
+#include "common.h"
+#include "dev-eth.h"
+#include "dev-gpio-buttons.h"
+#include "dev-leds-gpio.h"
+#include "dev-m25p80.h"
+#include "dev-spi.h"
+#include "dev-usb.h"
+#include "dev-wmac.h"
+#include "machtypes.h"
+
+#define DRAGINO2_GPIO_LED_WLAN		0
+#define DRAGINO2_GPIO_LED_LAN		13
+#define DRAGINO2_GPIO_LED_WAN		17
+
+/*
+ * The following GPIO is actually named "Router" on the board.
+ * However, since the "Router" feature is not supported as of yet
+ * we use it to display USB activity.
+ */
+
+#define DRAGINO2_GPIO_LED_USB		28
+#define DRAGINO2_GPIO_BTN_JUMPSTART	11
+#define DRAGINO2_GPIO_BTN_RESET		12
+
+#define DRAGINO2_KEYS_POLL_INTERVAL	20	/* msecs */
+#define DRAGINO2_KEYS_DEBOUNCE_INTERVAL	(3 * DRAGINO2_KEYS_POLL_INTERVAL)
+
+#define DRAGINO2_MAC0_OFFSET		0x0000
+#define DRAGINO2_MAC1_OFFSET		0x0006
+#define DRAGINO2_CALDATA_OFFSET		0x1000
+#define DRAGINO2_WMAC_MAC_OFFSET	0x1002
+
+static struct gpio_led dragino2_leds_gpio[] __initdata = {
+	{
+		.name		= "dragino2:red:lan",
+		.gpio		= DRAGINO2_GPIO_LED_LAN,
+		.active_low	= 0,
+	},
+	{
+		.name		= "dragino2:red:wlan",
+		.gpio		= DRAGINO2_GPIO_LED_WLAN,
+		.active_low	= 0,
+	},
+		{
+		.name		= "dragino2:red:wan",
+		.gpio		= DRAGINO2_GPIO_LED_WAN,
+		.active_low	= 0,
+	},
+	{
+		.name		= "dragino2:red:usb",
+		.gpio		= DRAGINO2_GPIO_LED_USB,
+		.active_low	= 0,
+	},
+};
+
+static struct gpio_keys_button dragino2_gpio_keys[] __initdata = {
+	{
+		.desc		= "jumpstart button",
+		.type		= EV_KEY,
+		.code		= KEY_WPS_BUTTON,
+		.debounce_interval = DRAGINO2_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= DRAGINO2_GPIO_BTN_JUMPSTART,
+		.active_low	= 1,
+	},
+	{
+		.desc		= "reset button",
+		.type		= EV_KEY,
+		.code		= KEY_RESTART,
+		.debounce_interval = DRAGINO2_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= DRAGINO2_GPIO_BTN_RESET,
+		.active_low	= 1,
+	}
+};
+
+static void __init dragino2_common_setup(void)
+{
+	u8 *art = (u8 *) KSEG1ADDR(0x1fff0000);
+
+	ath79_register_m25p80(NULL);
+	ath79_register_wmac(art + DRAGINO2_CALDATA_OFFSET,
+			    art + DRAGINO2_WMAC_MAC_OFFSET);
+
+	ath79_init_mac(ath79_eth0_data.mac_addr, art + DRAGINO2_MAC0_OFFSET, 0);
+	ath79_init_mac(ath79_eth1_data.mac_addr, art + DRAGINO2_MAC1_OFFSET, 0);
+
+	ath79_register_mdio(0, 0x0);
+
+	/* Enable GPIO15 and GPIO16 and possibly GPIO26 and GPIO27 */
+	ath79_gpio_function_disable(AR933X_GPIO_FUNC_ETH_SWITCH_LED2_EN |
+				    AR933X_GPIO_FUNC_ETH_SWITCH_LED3_EN);
+
+	/* LAN ports */
+	ath79_register_eth(1);
+
+	/* WAN port */
+	ath79_register_eth(0);
+}
+
+static void __init dragino2_setup(void)
+{
+	dragino2_common_setup();
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(dragino2_leds_gpio),
+				 dragino2_leds_gpio);
+	ath79_register_gpio_keys_polled(-1, DRAGINO2_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(dragino2_gpio_keys),
+					dragino2_gpio_keys);
+	ath79_register_usb();
+}
+
+MIPS_MACHINE(ATH79_MACH_DRAGINO2, "DRAGINO2", "Dragino Dragino v2",
+	     dragino2_setup);
+

target/linux/ar71xx/patches-3.10/629-MIPS-ath79-add-dragino2-support.patch

@@ -0,0 +1,39 @@
+--- a/arch/mips/ath79/Kconfig
++++ b/arch/mips/ath79/Kconfig
+@@ -305,6 +305,16 @@ config ATH79_MACH_DIR_825_C1
+ 	select ATH79_DEV_USB
+ 	select ATH79_DEV_WMAC
+ 
++config ATH79_MACH_DRAGINO2
++	bool "DRAGINO V2 support"
++	select SOC_AR933X
++	select ATH79_DEV_M25P80
++	select ATH79_DEV_GPIO_BUTTONS
++	select ATH79_DEV_LEDS_GPIO
++	select ATH79_DEV_WMAC
++	select ATH79_DEV_ETH
++	select ATH79_DEV_USB
++
+ config ATH79_MACH_EW_DORIN
+ 	bool "embedded wireless Dorin Platform support"
+ 	select SOC_AR933X
+--- a/arch/mips/ath79/Makefile
++++ b/arch/mips/ath79/Makefile
+@@ -58,6 +58,7 @@ obj-$(CONFIG_ATH79_MACH_DIR_600_A1)	+= m
+ obj-$(CONFIG_ATH79_MACH_DIR_615_C1)	+= mach-dir-615-c1.o
+ obj-$(CONFIG_ATH79_MACH_DIR_825_B1)	+= mach-dir-825-b1.o
+ obj-$(CONFIG_ATH79_MACH_DIR_825_C1)	+= mach-dir-825-c1.o
++obj-$(CONFIG_ATH79_MACH_DRAGINO2)	+= mach-dragino2.o
+ obj-$(CONFIG_ATH79_MACH_EW_DORIN)	+= mach-ew-dorin.o
+ obj-$(CONFIG_ATH79_MACH_EAP7660D)	+= mach-eap7660d.o
+ obj-$(CONFIG_ATH79_MACH_JA76PF)		+= mach-ja76pf.o
+--- a/arch/mips/ath79/machtypes.h
++++ b/arch/mips/ath79/machtypes.h
+@@ -44,6 +44,7 @@ enum ath79_mach_type {
+ 	ATH79_MACH_DIR_825_B1,		/* D-Link DIR-825 rev. B1 */
+ 	ATH79_MACH_DIR_825_C1,		/* D-Link DIR-825 rev. C1 */
+ 	ATH79_MACH_DIR_835_A1,		/* D-Link DIR-835 rev. A1 */
++	ATH79_MACH_DRAGINO2,		/* Dragino Version 2 */
+ 	ATH79_MACH_EW_DORIN,		/* embedded wireless Dorin Platform */
+ 	ATH79_MACH_EW_DORIN_ROUTER,	/* embedded wireless Dorin Router Platform */
+ 	ATH79_MACH_EAP7660D,		/* Senao EAP7660D */