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, 243 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-pxa/gumstix.c b/kernel/arch/arm/mach-pxa/gumstix.c
new file mode 100644
index 000000000..f6c76a3ee
--- /dev/null
+++ b/kernel/arch/arm/mach-pxa/gumstix.c
@@ -0,0 +1,243 @@
+/*
+ *  linux/arch/arm/mach-pxa/gumstix.c
+ *
+ *  Support for the Gumstix motherboards.
+ *
+ *  Original Author:	Craig Hughes
+ *  Created:	Feb 14, 2008
+ *  Copyright:	Craig Hughes
+ *
+ *  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.
+ *
+ *  Implemented based on lubbock.c by Nicolas Pitre and code from Craig
+ *  Hughes
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/gpio.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/usb/gpio_vbus.h>
+
+#include <asm/setup.h>
+#include <asm/memory.h>
+#include <asm/mach-types.h>
+#include <mach/hardware.h>
+#include <asm/irq.h>
+#include <asm/sizes.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/flash.h>
+
+#include <mach/pxa25x.h>
+#include <linux/platform_data/mmc-pxamci.h>
+#include <mach/udc.h>
+#include <mach/gumstix.h>
+
+#include "generic.h"
+
+static struct resource flash_resource = {
+	.start	= 0x00000000,
+	.end	= SZ_64M - 1,
+	.flags	= IORESOURCE_MEM,
+};
+
+static struct mtd_partition gumstix_partitions[] = {
+	{
+		.name =		"Bootloader",
+		.size =		0x00040000,
+		.offset =	0,
+		.mask_flags =	MTD_WRITEABLE  /* force read-only */
+	} , {
+		.name =		"rootfs",
+		.size =		MTDPART_SIZ_FULL,
+		.offset =	MTDPART_OFS_APPEND
+	}
+};
+
+static struct flash_platform_data gumstix_flash_data = {
+	.map_name	= "cfi_probe",
+	.parts		= gumstix_partitions,
+	.nr_parts	= ARRAY_SIZE(gumstix_partitions),
+	.width		= 2,
+};
+
+static struct platform_device gumstix_flash_device = {
+	.name		= "pxa2xx-flash",
+	.id		= 0,
+	.dev = {
+		.platform_data = &gumstix_flash_data,
+	},
+	.resource = &flash_resource,
+	.num_resources = 1,
+};
+
+static struct platform_device *devices[] __initdata = {
+	&gumstix_flash_device,
+};
+
+#ifdef CONFIG_MMC_PXA
+static struct pxamci_platform_data gumstix_mci_platform_data = {
+	.ocr_mask		= MMC_VDD_32_33|MMC_VDD_33_34,
+	.gpio_card_detect 	= -1,
+	.gpio_card_ro		= -1,
+	.gpio_power		= -1,
+};
+
+static void __init gumstix_mmc_init(void)
+{
+	pxa_set_mci_info(&gumstix_mci_platform_data);
+}
+#else
+static void __init gumstix_mmc_init(void)
+{
+	pr_debug("Gumstix mmc disabled\n");
+}
+#endif
+
+#ifdef CONFIG_USB_PXA25X
+static struct gpio_vbus_mach_info gumstix_udc_info = {
+	.gpio_vbus		= GPIO_GUMSTIX_USB_GPIOn,
+	.gpio_pullup		= GPIO_GUMSTIX_USB_GPIOx,
+};
+
+static struct platform_device gumstix_gpio_vbus = {
+	.name	= "gpio-vbus",
+	.id	= -1,
+	.dev	= {
+		.platform_data	= &gumstix_udc_info,
+	},
+};
+
+static void __init gumstix_udc_init(void)
+{
+	platform_device_register(&gumstix_gpio_vbus);
+}
+#else
+static void gumstix_udc_init(void)
+{
+	pr_debug("Gumstix udc is disabled\n");
+}
+#endif
+
+#ifdef CONFIG_BT
+/* Normally, the bootloader would have enabled this 32kHz clock but many
+** boards still have u-boot 1.1.4 so we check if it has been turned on and
+** if not, we turn it on with a warning message. */
+static void gumstix_setup_bt_clock(void)
+{
+	int timeout = 500;
+
+	if (!(OSCC & OSCC_OOK))
+		pr_warn("32kHz clock was not on. Bootloader may need to be updated\n");
+	else
+		return;
+
+	OSCC |= OSCC_OON;
+	do {
+		if (OSCC & OSCC_OOK)
+			break;
+		udelay(1);
+	} while (--timeout);
+	if (!timeout)
+		pr_err("Failed to start 32kHz clock\n");
+}
+
+static void __init gumstix_bluetooth_init(void)
+{
+	int err;
+
+	gumstix_setup_bt_clock();
+
+	err = gpio_request(GPIO_GUMSTIX_BTRESET, "BTRST");
+	if (err) {
+		pr_err("gumstix: failed request gpio for bluetooth reset\n");
+		return;
+	}
+
+	err = gpio_direction_output(GPIO_GUMSTIX_BTRESET, 1);
+	if (err) {
+		pr_err("gumstix: can't reset bluetooth\n");
+		return;
+	}
+	gpio_set_value(GPIO_GUMSTIX_BTRESET, 0);
+	udelay(100);
+	gpio_set_value(GPIO_GUMSTIX_BTRESET, 1);
+}
+#else
+static void gumstix_bluetooth_init(void)
+{
+	pr_debug("Gumstix Bluetooth is disabled\n");
+}
+#endif
+
+static unsigned long gumstix_pin_config[] __initdata = {
+	GPIO12_32KHz,
+	/* BTUART */
+	GPIO42_HWUART_RXD,
+	GPIO43_HWUART_TXD,
+	GPIO44_HWUART_CTS,
+	GPIO45_HWUART_RTS,
+	/* MMC */
+	GPIO6_MMC_CLK,
+	GPIO53_MMC_CLK,
+	GPIO8_MMC_CS0,
+};
+
+int __attribute__((weak)) am200_init(void)
+{
+	return 0;
+}
+
+int __attribute__((weak)) am300_init(void)
+{
+	return 0;
+}
+
+static void __init carrier_board_init(void)
+{
+	/*
+	 * put carrier/expansion board init here if
+	 * they cannot be detected programatically
+	 */
+	am200_init();
+	am300_init();
+}
+
+static void __init gumstix_init(void)
+{
+	pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config));
+
+	pxa_set_ffuart_info(NULL);
+	pxa_set_btuart_info(NULL);
+	pxa_set_stuart_info(NULL);
+	pxa_set_hwuart_info(NULL);
+
+	gumstix_bluetooth_init();
+	gumstix_udc_init();
+	gumstix_mmc_init();
+	(void) platform_add_devices(devices, ARRAY_SIZE(devices));
+	carrier_board_init();
+}
+
+MACHINE_START(GUMSTIX, "Gumstix")
+	.atag_offset	= 0x100, /* match u-boot bi_boot_params */
+	.map_io		= pxa25x_map_io,
+	.nr_irqs	= PXA_NR_IRQS,
+	.init_irq	= pxa25x_init_irq,
+	.handle_irq	= pxa25x_handle_irq,
+	.init_time	= pxa_timer_init,
+	.init_machine	= gumstix_init,
+	.restart	= pxa_restart,
+MACHINE_END