Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 313 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-ixp4xx/nslu2-setup.c b/kernel/arch/arm/mach-ixp4xx/nslu2-setup.c
new file mode 100644
index 000000000..88c025f52
--- /dev/null
+++ b/kernel/arch/arm/mach-ixp4xx/nslu2-setup.c
@@ -0,0 +1,313 @@
+/*
+ * arch/arm/mach-ixp4xx/nslu2-setup.c
+ *
+ * NSLU2 board-setup
+ *
+ * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
+ *
+ * based on ixdp425-setup.c:
+ *      Copyright (C) 2003-2004 MontaVista Software, Inc.
+ * based on nslu2-power.c:
+ *	Copyright (C) 2005 Tower Technologies
+ *
+ * Author: Mark Rakes <mrakes at mac.com>
+ * Author: Rod Whitby <rod@whitby.id.au>
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ * Maintainers: http://www.nslu2-linux.org/
+ *
+ */
+#include <linux/gpio.h>
+#include <linux/if_ether.h>
+#include <linux/irq.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
+#include <linux/leds.h>
+#include <linux/reboot.h>
+#include <linux/i2c.h>
+#include <linux/i2c-gpio.h>
+#include <linux/io.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/flash.h>
+#include <asm/mach/time.h>
+
+#define NSLU2_SDA_PIN		7
+#define NSLU2_SCL_PIN		6
+
+/* NSLU2 Timer */
+#define NSLU2_FREQ 66000000
+
+/* Buttons */
+#define NSLU2_PB_GPIO		5	/* power button */
+#define NSLU2_PO_GPIO		8	/* power off */
+#define NSLU2_RB_GPIO		12	/* reset button */
+
+/* Buzzer */
+#define NSLU2_GPIO_BUZZ		4
+
+/* LEDs */
+#define NSLU2_LED_RED_GPIO	0
+#define NSLU2_LED_GRN_GPIO	1
+#define NSLU2_LED_DISK1_GPIO	3
+#define NSLU2_LED_DISK2_GPIO	2
+
+static struct flash_platform_data nslu2_flash_data = {
+	.map_name		= "cfi_probe",
+	.width			= 2,
+};
+
+static struct resource nslu2_flash_resource = {
+	.flags			= IORESOURCE_MEM,
+};
+
+static struct platform_device nslu2_flash = {
+	.name			= "IXP4XX-Flash",
+	.id			= 0,
+	.dev.platform_data	= &nslu2_flash_data,
+	.num_resources		= 1,
+	.resource		= &nslu2_flash_resource,
+};
+
+static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
+	.sda_pin		= NSLU2_SDA_PIN,
+	.scl_pin		= NSLU2_SCL_PIN,
+};
+
+static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
+	{
+		I2C_BOARD_INFO("x1205", 0x6f),
+	},
+};
+
+static struct gpio_led nslu2_led_pins[] = {
+	{
+		.name		= "nslu2:green:ready",
+		.gpio		= NSLU2_LED_GRN_GPIO,
+	},
+	{
+		.name		= "nslu2:red:status",
+		.gpio		= NSLU2_LED_RED_GPIO,
+	},
+	{
+		.name		= "nslu2:green:disk-1",
+		.gpio		= NSLU2_LED_DISK1_GPIO,
+		.active_low	= true,
+	},
+	{
+		.name		= "nslu2:green:disk-2",
+		.gpio		= NSLU2_LED_DISK2_GPIO,
+		.active_low	= true,
+	},
+};
+
+static struct gpio_led_platform_data nslu2_led_data = {
+	.num_leds		= ARRAY_SIZE(nslu2_led_pins),
+	.leds			= nslu2_led_pins,
+};
+
+static struct platform_device nslu2_leds = {
+	.name			= "leds-gpio",
+	.id			= -1,
+	.dev.platform_data	= &nslu2_led_data,
+};
+
+static struct platform_device nslu2_i2c_gpio = {
+	.name			= "i2c-gpio",
+	.id			= 0,
+	.dev	 = {
+		.platform_data	= &nslu2_i2c_gpio_data,
+	},
+};
+
+static struct platform_device nslu2_beeper = {
+	.name			= "ixp4xx-beeper",
+	.id			= NSLU2_GPIO_BUZZ,
+	.num_resources		= 0,
+};
+
+static struct resource nslu2_uart_resources[] = {
+	{
+		.start		= IXP4XX_UART1_BASE_PHYS,
+		.end		= IXP4XX_UART1_BASE_PHYS + 0x0fff,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= IXP4XX_UART2_BASE_PHYS,
+		.end		= IXP4XX_UART2_BASE_PHYS + 0x0fff,
+		.flags		= IORESOURCE_MEM,
+	}
+};
+
+static struct plat_serial8250_port nslu2_uart_data[] = {
+	{
+		.mapbase	= IXP4XX_UART1_BASE_PHYS,
+		.membase	= (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
+		.irq		= IRQ_IXP4XX_UART1,
+		.flags		= UPF_BOOT_AUTOCONF,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= IXP4XX_UART_XTAL,
+	},
+	{
+		.mapbase	= IXP4XX_UART2_BASE_PHYS,
+		.membase	= (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
+		.irq		= IRQ_IXP4XX_UART2,
+		.flags		= UPF_BOOT_AUTOCONF,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= IXP4XX_UART_XTAL,
+	},
+	{ }
+};
+
+static struct platform_device nslu2_uart = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM,
+	.dev.platform_data	= nslu2_uart_data,
+	.num_resources		= 2,
+	.resource		= nslu2_uart_resources,
+};
+
+/* Built-in 10/100 Ethernet MAC interfaces */
+static struct eth_plat_info nslu2_plat_eth[] = {
+	{
+		.phy		= 1,
+		.rxq		= 3,
+		.txreadyq	= 20,
+	}
+};
+
+static struct platform_device nslu2_eth[] = {
+	{
+		.name			= "ixp4xx_eth",
+		.id			= IXP4XX_ETH_NPEB,
+		.dev.platform_data	= nslu2_plat_eth,
+	}
+};
+
+static struct platform_device *nslu2_devices[] __initdata = {
+	&nslu2_i2c_gpio,
+	&nslu2_flash,
+	&nslu2_beeper,
+	&nslu2_leds,
+	&nslu2_eth[0],
+};
+
+static void nslu2_power_off(void)
+{
+	/* This causes the box to drop the power and go dead. */
+
+	/* enable the pwr cntl gpio and assert power off */
+	gpio_direction_output(NSLU2_PO_GPIO, 1);
+}
+
+static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
+{
+	/* Signal init to do the ctrlaltdel action, this will bypass init if
+	 * it hasn't started and do a kernel_restart.
+	 */
+	ctrl_alt_del();
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
+{
+	/* This is the paper-clip reset, it shuts the machine down directly.
+	 */
+	machine_power_off();
+
+	return IRQ_HANDLED;
+}
+
+static int __init nslu2_gpio_init(void)
+{
+	if (!machine_is_nslu2())
+		return 0;
+
+	/* Request the power off GPIO */
+	return gpio_request(NSLU2_PO_GPIO, "power off");
+}
+device_initcall(nslu2_gpio_init);
+
+static void __init nslu2_timer_init(void)
+{
+    /* The xtal on this machine is non-standard. */
+    ixp4xx_timer_freq = NSLU2_FREQ;
+
+    /* Call standard timer_init function. */
+    ixp4xx_timer_init();
+}
+
+static void __init nslu2_init(void)
+{
+	uint8_t __iomem *f;
+	int i;
+
+	ixp4xx_sys_init();
+
+	nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
+	nslu2_flash_resource.end =
+		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
+
+	i2c_register_board_info(0, nslu2_i2c_board_info,
+				ARRAY_SIZE(nslu2_i2c_board_info));
+
+	/*
+	 * This is only useful on a modified machine, but it is valuable
+	 * to have it first in order to see debug messages, and so that
+	 * it does *not* get removed if platform_add_devices fails!
+	 */
+	(void)platform_device_register(&nslu2_uart);
+
+	platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
+
+	pm_power_off = nslu2_power_off;
+
+	if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
+		IRQF_TRIGGER_LOW, "NSLU2 reset button", NULL) < 0) {
+
+		printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
+			gpio_to_irq(NSLU2_RB_GPIO));
+	}
+
+	if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
+		IRQF_TRIGGER_HIGH, "NSLU2 power button", NULL) < 0) {
+
+		printk(KERN_DEBUG "Power Button IRQ %d not available\n",
+			gpio_to_irq(NSLU2_PB_GPIO));
+	}
+
+	/*
+	 * Map in a portion of the flash and read the MAC address.
+	 * Since it is stored in BE in the flash itself, we need to
+	 * byteswap it if we're in LE mode.
+	 */
+	f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000);
+	if (f) {
+		for (i = 0; i < 6; i++)
+#ifdef __ARMEB__
+			nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
+#else
+			nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
+#endif
+		iounmap(f);
+	}
+	printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
+	       nslu2_plat_eth[0].hwaddr);
+
+}
+
+MACHINE_START(NSLU2, "Linksys NSLU2")
+	/* Maintainer: www.nslu2-linux.org */
+	.atag_offset	= 0x100,
+	.map_io		= ixp4xx_map_io,
+	.init_early	= ixp4xx_init_early,
+	.init_irq	= ixp4xx_init_irq,
+	.init_time	= nslu2_timer_init,
+	.init_machine	= nslu2_init,
+#if defined(CONFIG_PCI)
+	.dma_zone_size	= SZ_64M,
+#endif
+	.restart	= ixp4xx_restart,
+MACHINE_END