ar71xx: add kernel support for TP-Link TL-MR13U

This patch adds support for TP-Link TL-MR13U router with built-in 10AH
rechargeable battery.

The patch is based on kamwanlai's patch:
https://forum.openwrt.org/viewtopic.php?pid=206746#p206746

Updated to accommodate recent changes introduced with:
ar71xx: remove fs_* variables from image/Makefile

Signed-off-by: Oleg Titov <oleg.titov@gmail.com>
Patchwork: http://patchwork.openwrt.org/patch/4063/
[juhosg:
  - refresh and rename rename 930-add-tl-mr13u-support.patch =>
    625-MIPS-ath79-add-tl-mr13u-support.patch]
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 38063

target/linux/ar71xx/config-3.10

@@ -65,6 +65,7 @@ CONFIG_ATH79_MACH_TEW_632BRP=y
 CONFIG_ATH79_MACH_TEW_673GRU=y
 CONFIG_ATH79_MACH_TEW_712BR=y
 CONFIG_ATH79_MACH_TL_MR11U=y
+CONFIG_ATH79_MACH_TL_MR13U=y
 CONFIG_ATH79_MACH_TL_MR3020=y
 CONFIG_ATH79_MACH_TL_MR3X20=y
 CONFIG_ATH79_MACH_TL_WA901ND=y

target/linux/ar71xx/files/arch/mips/ath79/mach-tl-mr13u.c

@@ -0,0 +1,107 @@
+/*
+ *  TP-LINK TL-MR13U board support
+ *
+ *  Copyright (C) 2011 dongyuqi <729650915@qq.com>
+ *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.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 "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_MR13U_GPIO_LED_SYSTEM	27
+
+#define TL_MR13U_GPIO_BTN_RESET		11
+#define TL_MR13U_GPIO_BTN_SW1		6
+#define TL_MR13U_GPIO_BTN_SW2		7
+
+#define TL_MR13U_GPIO_USB_POWER		18
+
+#define TL_MR13U_KEYS_POLL_INTERVAL	20	/* msecs */
+#define TL_MR13U_KEYS_DEBOUNCE_INTERVAL	(3 * TL_MR13U_KEYS_POLL_INTERVAL)
+
+static const char *tl_mr13u_part_probes[] = {
+	"tp-link",
+	NULL,
+};
+
+static struct flash_platform_data tl_mr13u_flash_data = {
+	.part_probes	= tl_mr13u_part_probes,
+};
+
+static struct gpio_led tl_mr13u_leds_gpio[] __initdata = {
+	{
+		.name		= "tp-link:blue:system",
+		.gpio		= TL_MR13U_GPIO_LED_SYSTEM,
+		.active_low	= 1,
+	},
+};
+
+static struct gpio_keys_button tl_mr13u_gpio_keys[] __initdata = {
+	{
+		.desc		= "reset",
+		.type		= EV_KEY,
+		.code		= KEY_RESTART,
+		.debounce_interval = TL_MR13U_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_MR13U_GPIO_BTN_RESET,
+		.active_low	= 0,
+	},
+	{
+		.desc		= "sw1",
+		.type		= EV_KEY,
+		.code		= BTN_0,
+		.debounce_interval = TL_MR13U_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_MR13U_GPIO_BTN_SW1,
+		.active_low	= 0,
+	},
+	{
+		.desc		= "sw2",
+		.type		= EV_KEY,
+		.code		= BTN_1,
+		.debounce_interval = TL_MR13U_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_MR13U_GPIO_BTN_SW2,
+		.active_low	= 0,
+	},
+};
+
+static void __init tl_mr13u_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_mr13u_flash_data);
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(tl_mr13u_leds_gpio),
+				 tl_mr13u_leds_gpio);
+	ath79_register_gpio_keys_polled(-1, TL_MR13U_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(tl_mr13u_gpio_keys),
+					tl_mr13u_gpio_keys);
+
+	gpio_request_one(TL_MR13U_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, 0);
+
+	ath79_register_mdio(0, 0x0);
+	ath79_register_eth(0);
+	ath79_register_wmac(ee, mac);
+}
+
+MIPS_MACHINE(ATH79_MACH_TL_MR13U, "TL-MR13U", "TP-LINK TL-MR13U v1",
+	     tl_mr13u_setup);

target/linux/ar71xx/patches-3.10/625-MIPS-ath79-add-tl-mr13u-support.patch

@@ -0,0 +1,39 @@
+--- a/arch/mips/ath79/Kconfig
++++ b/arch/mips/ath79/Kconfig
+@@ -535,6 +535,16 @@ config ATH79_MACH_TL_MR11U
+ 	select ATH79_DEV_USB
+ 	select ATH79_DEV_WMAC
+ 
++config ATH79_MACH_TL_MR13U
++	bool "TP-LINK TL-MR13U 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_MR3020
+ 	bool "TP-LINK TL-MR3020 support"
+ 	select SOC_AR933X
+--- a/arch/mips/ath79/machtypes.h
++++ b/arch/mips/ath79/machtypes.h
+@@ -84,6 +84,7 @@ enum ath79_mach_type {
+ 	ATH79_MACH_TEW_712BR,		/* TRENDnet TEW-712BR */
+ 	ATH79_MACH_TL_MR10U,		/* TP-LINK TL-MR10U */
+ 	ATH79_MACH_TL_MR11U,		/* TP-LINK TL-MR11U */
++	ATH79_MACH_TL_MR13U,		/* TP-LINK TL-MR13U */
+ 	ATH79_MACH_TL_MR3020,		/* TP-LINK TL-MR3020 */
+ 	ATH79_MACH_TL_MR3040,		/* TP-LINK TL-MR3040 */
+ 	ATH79_MACH_TL_MR3220,		/* TP-LINK TL-MR3220 */
+--- a/arch/mips/ath79/Makefile
++++ b/arch/mips/ath79/Makefile
+@@ -80,6 +80,7 @@ obj-$(CONFIG_ATH79_MACH_TEW_632BRP)	+= m
+ obj-$(CONFIG_ATH79_MACH_TEW_673GRU)	+= mach-tew-673gru.o
+ obj-$(CONFIG_ATH79_MACH_TEW_712BR)	+= mach-tew-712br.o
+ obj-$(CONFIG_ATH79_MACH_TL_MR11U)	+= mach-tl-mr11u.o
++obj-$(CONFIG_ATH79_MACH_TL_MR13U)	+= mach-tl-mr13u.o
+ obj-$(CONFIG_ATH79_MACH_TL_MR3020)	+= mach-tl-mr3020.o
+ obj-$(CONFIG_ATH79_MACH_TL_MR3X20)	+= mach-tl-mr3x20.o
+ obj-$(CONFIG_ATH79_MACH_TL_WA901ND)	+= mach-tl-wa901nd.o