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, 198 insertions, 0 deletions

diff --git a/kernel/arch/powerpc/platforms/52xx/lite5200.c b/kernel/arch/powerpc/platforms/52xx/lite5200.c
new file mode 100644
index 000000000..7492de3cf
--- /dev/null
+++ b/kernel/arch/powerpc/platforms/52xx/lite5200.c
@@ -0,0 +1,198 @@
+/*
+ * Freescale Lite5200 board support
+ *
+ * Written by: Grant Likely <grant.likely@secretlab.ca>
+ *
+ * Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved.
+ * Copyright 2006 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Description:
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#undef DEBUG
+
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/root_dev.h>
+#include <linux/initrd.h>
+#include <asm/time.h>
+#include <asm/io.h>
+#include <asm/machdep.h>
+#include <asm/prom.h>
+#include <asm/mpc52xx.h>
+
+/* ************************************************************************
+ *
+ * Setup the architecture
+ *
+ */
+
+/* mpc5200 device tree match tables */
+static const struct of_device_id mpc5200_cdm_ids[] __initconst = {
+	{ .compatible = "fsl,mpc5200-cdm", },
+	{ .compatible = "mpc5200-cdm", },
+	{}
+};
+
+static const struct of_device_id mpc5200_gpio_ids[] __initconst = {
+	{ .compatible = "fsl,mpc5200-gpio", },
+	{ .compatible = "mpc5200-gpio", },
+	{}
+};
+
+/*
+ * Fix clock configuration.
+ *
+ * Firmware is supposed to be responsible for this.  If you are creating a
+ * new board port, do *NOT* duplicate this code.  Fix your boot firmware
+ * to set it correctly in the first place
+ */
+static void __init
+lite5200_fix_clock_config(void)
+{
+	struct device_node *np;
+	struct mpc52xx_cdm  __iomem *cdm;
+	/* Map zones */
+	np = of_find_matching_node(NULL, mpc5200_cdm_ids);
+	cdm = of_iomap(np, 0);
+	of_node_put(np);
+	if (!cdm) {
+		printk(KERN_ERR "%s() failed; expect abnormal behaviour\n",
+		       __func__);
+		return;
+	}
+
+	/* Use internal 48 Mhz */
+	out_8(&cdm->ext_48mhz_en, 0x00);
+	out_8(&cdm->fd_enable, 0x01);
+	if (in_be32(&cdm->rstcfg) & 0x40)	/* Assumes 33Mhz clock */
+		out_be16(&cdm->fd_counters, 0x0001);
+	else
+		out_be16(&cdm->fd_counters, 0x5555);
+
+	/* Unmap the regs */
+	iounmap(cdm);
+}
+
+/*
+ * Fix setting of port_config register.
+ *
+ * Firmware is supposed to be responsible for this.  If you are creating a
+ * new board port, do *NOT* duplicate this code.  Fix your boot firmware
+ * to set it correctly in the first place
+ */
+static void __init
+lite5200_fix_port_config(void)
+{
+	struct device_node *np;
+	struct mpc52xx_gpio __iomem *gpio;
+	u32 port_config;
+
+	np = of_find_matching_node(NULL, mpc5200_gpio_ids);
+	gpio = of_iomap(np, 0);
+	of_node_put(np);
+	if (!gpio) {
+		printk(KERN_ERR "%s() failed. expect abnormal behavior\n",
+		       __func__);
+		return;
+	}
+
+	/* Set port config */
+	port_config = in_be32(&gpio->port_config);
+
+	port_config &= ~0x00800000;	/* 48Mhz internal, pin is GPIO	*/
+
+	port_config &= ~0x00007000;	/* USB port : Differential mode	*/
+	port_config |=  0x00001000;	/*            USB 1 only	*/
+
+	port_config &= ~0x03000000;	/* ATA CS is on csb_4/5		*/
+	port_config |=  0x01000000;
+
+	pr_debug("port_config: old:%x new:%x\n",
+	         in_be32(&gpio->port_config), port_config);
+	out_be32(&gpio->port_config, port_config);
+
+	/* Unmap zone */
+	iounmap(gpio);
+}
+
+#ifdef CONFIG_PM
+static void lite5200_suspend_prepare(void __iomem *mbar)
+{
+	u8 pin = 1;	/* GPIO_WKUP_1 (GPIO_PSC2_4) */
+	u8 level = 0;	/* wakeup on low level */
+	mpc52xx_set_wakeup_gpio(pin, level);
+
+	/*
+	 * power down usb port
+	 * this needs to be called before of-ohci suspend code
+	 */
+
+	/* set ports to "power switched" and "powered at the same time"
+	 * USB Rh descriptor A: NPS = 0, PSM = 0 */
+	out_be32(mbar + 0x1048, in_be32(mbar + 0x1048) & ~0x300);
+	/* USB Rh status: LPS = 1 - turn off power */
+	out_be32(mbar + 0x1050, 0x00000001);
+}
+
+static void lite5200_resume_finish(void __iomem *mbar)
+{
+	/* USB Rh status: LPSC = 1 - turn on power */
+	out_be32(mbar + 0x1050, 0x00010000);
+}
+#endif
+
+static void __init lite5200_setup_arch(void)
+{
+	if (ppc_md.progress)
+		ppc_md.progress("lite5200_setup_arch()", 0);
+
+	/* Map important registers from the internal memory map */
+	mpc52xx_map_common_devices();
+
+	/* Some mpc5200 & mpc5200b related configuration */
+	mpc5200_setup_xlb_arbiter();
+
+	/* Fix things that firmware should have done. */
+	lite5200_fix_clock_config();
+	lite5200_fix_port_config();
+
+#ifdef CONFIG_PM
+	mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
+	mpc52xx_suspend.board_resume_finish = lite5200_resume_finish;
+	lite5200_pm_init();
+#endif
+
+	mpc52xx_setup_pci();
+}
+
+static const char * const board[] __initconst = {
+	"fsl,lite5200",
+	"fsl,lite5200b",
+	NULL,
+};
+
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+static int __init lite5200_probe(void)
+{
+	return of_flat_dt_match(of_get_flat_dt_root(), board);
+}
+
+define_machine(lite5200) {
+	.name 		= "lite5200",
+	.probe 		= lite5200_probe,
+	.setup_arch 	= lite5200_setup_arch,
+	.init		= mpc52xx_declare_of_platform_devices,
+	.init_IRQ 	= mpc52xx_init_irq,
+	.get_irq 	= mpc52xx_get_irq,
+	.restart	= mpc52xx_restart,
+	.calibrate_decr	= generic_calibrate_decr,
+};