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, 299 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-ixp4xx/dsmg600-setup.c b/kernel/arch/arm/mach-ixp4xx/dsmg600-setup.c
new file mode 100644
index 000000000..43ee06d3a
--- /dev/null
+++ b/kernel/arch/arm/mach-ixp4xx/dsmg600-setup.c
@@ -0,0 +1,299 @@
+/*
+ * DSM-G600 board-setup
+ *
+ * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
+ * Copyright (C) 2006 Tower Technologies
+ *
+ * based on ixdp425-setup.c:
+ *      Copyright (C) 2003-2004 MontaVista Software, Inc.
+ * based on nslu2-power.c:
+ *	Copyright (C) 2005 Tower Technologies
+ * based on nslu2-io.c:
+ *	Copyright (C) 2004 Karen Spearel
+ *
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ * Author: Michael Westerhof <mwester@dls.net>
+ * Author: Rod Whitby <rod@whitby.id.au>
+ * Maintainers: http://www.nslu2-linux.org/
+ */
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/jiffies.h>
+#include <linux/timer.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/gpio.h>
+
+#include <mach/hardware.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/flash.h>
+#include <asm/mach/time.h>
+
+#define DSMG600_SDA_PIN		5
+#define DSMG600_SCL_PIN		4
+
+/* DSM-G600 Timer Setting */
+#define DSMG600_FREQ		66000000
+
+/* Buttons */
+#define DSMG600_PB_GPIO		15	/* power button */
+#define DSMG600_RB_GPIO		3	/* reset button */
+
+/* Power control */
+#define DSMG600_PO_GPIO		2	/* power off */
+
+/* LEDs */
+#define DSMG600_LED_PWR_GPIO	0
+#define DSMG600_LED_WLAN_GPIO	14
+
+static struct flash_platform_data dsmg600_flash_data = {
+	.map_name		= "cfi_probe",
+	.width			= 2,
+};
+
+static struct resource dsmg600_flash_resource = {
+	.flags			= IORESOURCE_MEM,
+};
+
+static struct platform_device dsmg600_flash = {
+	.name			= "IXP4XX-Flash",
+	.id			= 0,
+	.dev.platform_data	= &dsmg600_flash_data,
+	.num_resources		= 1,
+	.resource		= &dsmg600_flash_resource,
+};
+
+static struct i2c_gpio_platform_data dsmg600_i2c_gpio_data = {
+	.sda_pin		= DSMG600_SDA_PIN,
+	.scl_pin		= DSMG600_SCL_PIN,
+};
+
+static struct platform_device dsmg600_i2c_gpio = {
+	.name			= "i2c-gpio",
+	.id			= 0,
+	.dev	 = {
+		.platform_data	= &dsmg600_i2c_gpio_data,
+	},
+};
+
+static struct i2c_board_info __initdata dsmg600_i2c_board_info [] = {
+	{
+		I2C_BOARD_INFO("pcf8563", 0x51),
+	},
+};
+
+static struct gpio_led dsmg600_led_pins[] = {
+	{
+		.name		= "dsmg600:green:power",
+		.gpio		= DSMG600_LED_PWR_GPIO,
+	},
+	{
+		.name		= "dsmg600:green:wlan",
+		.gpio		= DSMG600_LED_WLAN_GPIO,
+		.active_low	= true,
+	},
+};
+
+static struct gpio_led_platform_data dsmg600_led_data = {
+	.num_leds		= ARRAY_SIZE(dsmg600_led_pins),
+	.leds			= dsmg600_led_pins,
+};
+
+static struct platform_device dsmg600_leds = {
+	.name			= "leds-gpio",
+	.id			= -1,
+	.dev.platform_data	= &dsmg600_led_data,
+};
+
+static struct resource dsmg600_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 dsmg600_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 dsmg600_uart = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM,
+	.dev.platform_data	= dsmg600_uart_data,
+	.num_resources		= ARRAY_SIZE(dsmg600_uart_resources),
+	.resource		= dsmg600_uart_resources,
+};
+
+static struct platform_device *dsmg600_devices[] __initdata = {
+	&dsmg600_i2c_gpio,
+	&dsmg600_flash,
+	&dsmg600_leds,
+};
+
+static void dsmg600_power_off(void)
+{
+	/* enable the pwr cntl and drive it high */
+	gpio_direction_output(DSMG600_PO_GPIO, 1);
+}
+
+/* This is used to make sure the power-button pusher is serious.  The button
+ * must be held until the value of this counter reaches zero.
+ */
+static int power_button_countdown;
+
+/* Must hold the button down for at least this many counts to be processed */
+#define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */
+
+static void dsmg600_power_handler(unsigned long data);
+static DEFINE_TIMER(dsmg600_power_timer, dsmg600_power_handler, 0, 0);
+
+static void dsmg600_power_handler(unsigned long data)
+{
+	/* This routine is called twice per second to check the
+	 * state of the power button.
+	 */
+
+	if (gpio_get_value(DSMG600_PB_GPIO)) {
+
+		/* IO Pin is 1 (button pushed) */
+		if (power_button_countdown > 0)
+			power_button_countdown--;
+
+	} else {
+
+		/* Done on button release, to allow for auto-power-on mods. */
+		if (power_button_countdown == 0) {
+			/* Signal init to do the ctrlaltdel action,
+			 * this will bypass init if it hasn't started
+			 * and do a kernel_restart.
+			 */
+			ctrl_alt_del();
+
+			/* Change the state of the power LED to "blink" */
+			gpio_set_value(DSMG600_LED_PWR_GPIO, 0);
+		} else {
+			power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
+		}
+	}
+
+	mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
+}
+
+static irqreturn_t dsmg600_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 void __init dsmg600_timer_init(void)
+{
+    /* The xtal on this machine is non-standard. */
+    ixp4xx_timer_freq = DSMG600_FREQ;
+
+    /* Call standard timer_init function. */
+    ixp4xx_timer_init();
+}
+
+static int __init dsmg600_gpio_init(void)
+{
+	if (!machine_is_dsmg600())
+		return 0;
+
+	gpio_request(DSMG600_RB_GPIO, "reset button");
+	if (request_irq(gpio_to_irq(DSMG600_RB_GPIO), &dsmg600_reset_handler,
+		IRQF_TRIGGER_LOW, "DSM-G600 reset button", NULL) < 0) {
+
+		printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
+			gpio_to_irq(DSMG600_RB_GPIO));
+	}
+
+	/*
+	 * The power button on the D-Link DSM-G600 is on GPIO 15, but
+	 * it cannot handle interrupts on that GPIO line.  So we'll
+	 * have to poll it with a kernel timer.
+	 */
+
+	/* Make sure that the power button GPIO is set up as an input */
+	gpio_request(DSMG600_PB_GPIO, "power button");
+	gpio_direction_input(DSMG600_PB_GPIO);
+	/* Request poweroff GPIO line */
+	gpio_request(DSMG600_PO_GPIO, "power off button");
+
+	/* Set the initial value for the power button IRQ handler */
+	power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
+
+	mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
+	return 0;
+}
+device_initcall(dsmg600_gpio_init);
+
+static void __init dsmg600_init(void)
+{
+	ixp4xx_sys_init();
+
+	/* Make sure that GPIO14 and GPIO15 are not used as clocks */
+	*IXP4XX_GPIO_GPCLKR = 0;
+
+	dsmg600_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
+	dsmg600_flash_resource.end =
+		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
+
+	i2c_register_board_info(0, dsmg600_i2c_board_info,
+				ARRAY_SIZE(dsmg600_i2c_board_info));
+
+	/* The UART is required on the DSM-G600 (Redboot cannot use the
+	 * NIC) -- do it here so that it does *not* get removed if
+	 * platform_add_devices fails!
+         */
+        (void)platform_device_register(&dsmg600_uart);
+
+	platform_add_devices(dsmg600_devices, ARRAY_SIZE(dsmg600_devices));
+
+	pm_power_off = dsmg600_power_off;
+}
+
+MACHINE_START(DSMG600, "D-Link DSM-G600 RevA")
+	/* 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	= dsmg600_timer_init,
+	.init_machine	= dsmg600_init,
+#if defined(CONFIG_PCI)
+	.dma_zone_size	= SZ_64M,
+#endif
+	.restart	= ixp4xx_restart,
+MACHINE_END