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, 200 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-ks8695/board-og.c b/kernel/arch/arm/mach-ks8695/board-og.c
new file mode 100644
index 000000000..f2658168e
--- /dev/null
+++ b/kernel/arch/arm/mach-ks8695/board-og.c
@@ -0,0 +1,200 @@
+/*
+ * board-og.c -- support for the OpenGear KS8695 based boards.
+ *
+ * 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/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/serial_8250.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <mach/devices.h>
+#include <mach/regs-gpio.h>
+#include <mach/gpio-ks8695.h>
+#include "generic.h"
+
+static int og_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+	if (machine_is_im4004() && (slot == 8))
+		return KS8695_IRQ_EXTERN1;
+	return KS8695_IRQ_EXTERN0;
+}
+
+static struct ks8695_pci_cfg __initdata og_pci = {
+	.mode		= KS8695_MODE_PCI,
+	.map_irq	= og_pci_map_irq,
+};
+
+static void __init og_register_pci(void)
+{
+	/* Initialize the GPIO lines for interrupt mode */
+	ks8695_gpio_interrupt(KS8695_GPIO_0, IRQ_TYPE_LEVEL_LOW);
+
+	/* Cardbus Slot */
+	if (machine_is_im4004())
+		ks8695_gpio_interrupt(KS8695_GPIO_1, IRQ_TYPE_LEVEL_LOW);
+
+	if (IS_ENABLED(CONFIG_PCI))
+		ks8695_init_pci(&og_pci);
+}
+
+/*
+ * The PCI bus reset is driven by a dedicated GPIO line. Toggle it here
+ * and bring the PCI bus out of reset.
+ */
+static void __init og_pci_bus_reset(void)
+{
+	unsigned int rstline = 1;
+
+	/* Some boards use a different GPIO as the PCI reset line */
+	if (machine_is_im4004())
+		rstline = 2;
+	else if (machine_is_im42xx())
+		rstline = 0;
+
+	gpio_request(rstline, "PCI reset");
+	gpio_direction_output(rstline, 0);
+
+	/* Drive a reset on the PCI reset line */
+	gpio_set_value(rstline, 1);
+	gpio_set_value(rstline, 0);
+	mdelay(100);
+	gpio_set_value(rstline, 1);
+	mdelay(100);
+}
+
+/*
+ * Direct connect serial ports (non-PCI that is).
+ */
+#define	S8250_PHYS	0x03800000
+#define	S8250_VIRT	0xf4000000
+#define	S8250_SIZE	0x00100000
+
+static struct __initdata map_desc og_io_desc[] = {
+	{
+		.virtual	= S8250_VIRT,
+		.pfn		= __phys_to_pfn(S8250_PHYS),
+		.length		= S8250_SIZE,
+		.type		= MT_DEVICE,
+	}
+};
+
+static struct resource og_uart_resources[] = {
+	{
+		.start		= S8250_VIRT,
+		.end		= S8250_VIRT + S8250_SIZE,
+		.flags		= IORESOURCE_MEM
+	},
+};
+
+static struct plat_serial8250_port og_uart_data[] = {
+	{
+		.mapbase	= S8250_VIRT,
+		.membase	= (char *) S8250_VIRT,
+		.irq		= 3,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= 115200 * 16,
+	},
+	{ },
+};
+
+static struct platform_device og_uart = {
+	.name			= "serial8250",
+	.id			= 0,
+	.dev.platform_data	= og_uart_data,
+	.num_resources		= 1,
+	.resource		= og_uart_resources
+};
+
+static struct platform_device *og_devices[] __initdata = {
+	&og_uart
+};
+
+static void __init og_init(void)
+{
+	ks8695_register_gpios();
+
+	if (machine_is_cm4002()) {
+		ks8695_gpio_interrupt(KS8695_GPIO_1, IRQ_TYPE_LEVEL_HIGH);
+		iotable_init(og_io_desc, ARRAY_SIZE(og_io_desc));
+		platform_add_devices(og_devices, ARRAY_SIZE(og_devices));
+	} else {
+		og_pci_bus_reset();
+		og_register_pci();
+	}
+
+	ks8695_add_device_lan();
+	ks8695_add_device_wan();
+}
+
+#ifdef CONFIG_MACH_CM4002
+MACHINE_START(CM4002, "OpenGear/CM4002")
+	/* OpenGear Inc. */
+	.atag_offset	= 0x100,
+	.map_io		= ks8695_map_io,
+	.init_irq	= ks8695_init_irq,
+	.init_machine	= og_init,
+	.init_time	= ks8695_timer_init,
+	.restart        = ks8695_restart,
+MACHINE_END
+#endif
+
+#ifdef CONFIG_MACH_CM4008
+MACHINE_START(CM4008, "OpenGear/CM4008")
+	/* OpenGear Inc. */
+	.atag_offset	= 0x100,
+	.map_io		= ks8695_map_io,
+	.init_irq	= ks8695_init_irq,
+	.init_machine	= og_init,
+	.init_time	= ks8695_timer_init,
+	.restart        = ks8695_restart,
+MACHINE_END
+#endif
+
+#ifdef CONFIG_MACH_CM41xx
+MACHINE_START(CM41XX, "OpenGear/CM41xx")
+	/* OpenGear Inc. */
+	.atag_offset	= 0x100,
+	.map_io		= ks8695_map_io,
+	.init_irq	= ks8695_init_irq,
+	.init_machine	= og_init,
+	.init_time	= ks8695_timer_init,
+	.restart        = ks8695_restart,
+MACHINE_END
+#endif
+
+#ifdef CONFIG_MACH_IM4004
+MACHINE_START(IM4004, "OpenGear/IM4004")
+	/* OpenGear Inc. */
+	.atag_offset	= 0x100,
+	.map_io		= ks8695_map_io,
+	.init_irq	= ks8695_init_irq,
+	.init_machine	= og_init,
+	.init_time	= ks8695_timer_init,
+	.restart        = ks8695_restart,
+MACHINE_END
+#endif
+
+#ifdef CONFIG_MACH_IM42xx
+MACHINE_START(IM42XX, "OpenGear/IM42xx")
+	/* OpenGear Inc. */
+	.atag_offset	= 0x100,
+	.map_io		= ks8695_map_io,
+	.init_irq	= ks8695_init_irq,
+	.init_machine	= og_init,
+	.init_time	= ks8695_timer_init,
+	.restart        = ks8695_restart,
+MACHINE_END
+#endif