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>

4 files changed, 487 insertions, 0 deletions

diff --git a/kernel/arch/avr32/boards/favr-32/Kconfig b/kernel/arch/avr32/boards/favr-32/Kconfig
new file mode 100644
index 000000000..2c83d1ddc
--- /dev/null
+++ b/kernel/arch/avr32/boards/favr-32/Kconfig
@@ -0,0 +1,22 @@
+# Favr-32 customization
+
+if BOARD_FAVR_32
+
+config BOARD_FAVR32_ABDAC_RATE
+	int "DAC target rate"
+	default 44100
+	range 32000 50000
+	help
+	  Specify the target rate the internal DAC should try to match. This
+	  will use PLL1 to generate a frequency as close as possible to this
+	  rate.
+
+	  Must be within the range 32000 to 50000, which should be suitable to
+	  generate most other frequencies in power of 2 steps.
+
+	  Ex:
+		48000 will also suit 24000 and 12000
+		44100 will also suit 22050 and 11025
+		32000 will also suit 16000 and 8000
+
+endif # BOARD_FAVR_32
diff --git a/kernel/arch/avr32/boards/favr-32/Makefile b/kernel/arch/avr32/boards/favr-32/Makefile
new file mode 100644
index 000000000..234f21508
--- /dev/null
+++ b/kernel/arch/avr32/boards/favr-32/Makefile
@@ -0,0 +1 @@
+obj-y	+= setup.o flash.o
diff --git a/kernel/arch/avr32/boards/favr-32/flash.c b/kernel/arch/avr32/boards/favr-32/flash.c
new file mode 100644
index 000000000..604bbd5e4
--- /dev/null
+++ b/kernel/arch/avr32/boards/favr-32/flash.c
@@ -0,0 +1,98 @@
+/*
+ * Favr-32 board-specific flash initialization
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ *
+ * 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/init.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+
+#include <mach/smc.h>
+
+static struct smc_timing flash_timing __initdata = {
+	.ncs_read_setup		= 0,
+	.nrd_setup		= 40,
+	.ncs_write_setup	= 0,
+	.nwe_setup		= 10,
+
+	.ncs_read_pulse		= 80,
+	.nrd_pulse		= 40,
+	.ncs_write_pulse	= 65,
+	.nwe_pulse		= 55,
+
+	.read_cycle		= 120,
+	.write_cycle		= 120,
+};
+
+static struct smc_config flash_config __initdata = {
+	.bus_width		= 2,
+	.nrd_controlled		= 1,
+	.nwe_controlled		= 1,
+	.byte_write		= 1,
+};
+
+static struct mtd_partition flash_parts[] = {
+	{
+		.name           = "u-boot",
+		.offset         = 0x00000000,
+		.size           = 0x00020000,           /* 128 KiB */
+		.mask_flags     = MTD_WRITEABLE,
+	},
+	{
+		.name           = "root",
+		.offset         = 0x00020000,
+		.size           = 0x007d0000,
+	},
+	{
+		.name           = "env",
+		.offset         = 0x007f0000,
+		.size           = 0x00010000,
+		.mask_flags     = MTD_WRITEABLE,
+	},
+};
+
+static struct physmap_flash_data flash_data = {
+	.width		= 2,
+	.nr_parts	= ARRAY_SIZE(flash_parts),
+	.parts		= flash_parts,
+};
+
+static struct resource flash_resource = {
+	.start		= 0x00000000,
+	.end		= 0x007fffff,
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device flash_device = {
+	.name		= "physmap-flash",
+	.id		= 0,
+	.resource	= &flash_resource,
+	.num_resources	= 1,
+	.dev		= {
+		.platform_data = &flash_data,
+	},
+};
+
+/* This needs to be called after the SMC has been initialized */
+static int __init favr32_flash_init(void)
+{
+	int ret;
+
+	smc_set_timing(&flash_config, &flash_timing);
+	ret = smc_set_configuration(0, &flash_config);
+	if (ret < 0) {
+		printk(KERN_ERR "Favr-32: failed to set NOR flash timing\n");
+		return ret;
+	}
+
+	platform_device_register(&flash_device);
+
+	return 0;
+}
+device_initcall(favr32_flash_init);
diff --git a/kernel/arch/avr32/boards/favr-32/setup.c b/kernel/arch/avr32/boards/favr-32/setup.c
new file mode 100644
index 000000000..234cb071c
--- /dev/null
+++ b/kernel/arch/avr32/boards/favr-32/setup.c
@@ -0,0 +1,366 @@
+/*
+ * Favr-32 board-specific setup code.
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ *
+ * 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/clk.h>
+#include <linux/etherdevice.h>
+#include <linux/bootmem.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <linux/linkage.h>
+#include <linux/gpio.h>
+#include <linux/leds.h>
+#include <linux/atmel-mci.h>
+#include <linux/pwm.h>
+#include <linux/pwm_backlight.h>
+#include <linux/regulator/fixed.h>
+#include <linux/regulator/machine.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/ads7846.h>
+
+#include <sound/atmel-abdac.h>
+
+#include <video/atmel_lcdc.h>
+
+#include <asm/setup.h>
+
+#include <mach/at32ap700x.h>
+#include <mach/init.h>
+#include <mach/board.h>
+#include <mach/portmux.h>
+
+#define PWM_BL_CH 2
+
+/* Oscillator frequencies. These are board-specific */
+unsigned long at32_board_osc_rates[3] = {
+	[0] = 32768,	/* 32.768 kHz on RTC osc */
+	[1] = 20000000,	/* 20 MHz on osc0 */
+	[2] = 12000000,	/* 12 MHz on osc1 */
+};
+
+/* Initialized by bootloader-specific startup code. */
+struct tag *bootloader_tags __initdata;
+
+static struct atmel_abdac_pdata __initdata abdac0_data = {
+};
+
+struct eth_addr {
+	u8 addr[6];
+};
+static struct eth_addr __initdata hw_addr[1];
+static struct macb_platform_data __initdata eth_data[1] = {
+	{
+		.phy_mask	= ~(1U << 1),
+	},
+};
+
+static int ads7843_get_pendown_state(void)
+{
+	return !gpio_get_value(GPIO_PIN_PB(3));
+}
+
+static struct ads7846_platform_data ads7843_data = {
+	.model			= 7843,
+	.get_pendown_state	= ads7843_get_pendown_state,
+	.pressure_max		= 255,
+	/*
+	 * Values below are for debounce filtering, these can be experimented
+	 * with further.
+	 */
+	.debounce_max		= 20,
+	.debounce_rep		= 4,
+	.debounce_tol		= 5,
+
+	.keep_vref_on		= true,
+	.settle_delay_usecs	= 500,
+	.penirq_recheck_delay_usecs = 100,
+};
+
+static struct spi_board_info __initdata spi1_board_info[] = {
+	{
+		/* ADS7843 touch controller */
+		.modalias	= "ads7846",
+		.max_speed_hz	= 2000000,
+		.chip_select	= 0,
+		.bus_num	= 1,
+		.platform_data	= &ads7843_data,
+	},
+};
+
+static struct mci_platform_data __initdata mci0_data = {
+	.slot[0] = {
+		.bus_width	= 4,
+		.detect_pin	= -ENODEV,
+		.wp_pin		= -ENODEV,
+	},
+};
+
+static struct fb_videomode __initdata lb104v03_modes[] = {
+	{
+		.name		= "640x480 @ 50",
+		.refresh	= 50,
+		.xres		= 640,		.yres		= 480,
+		.pixclock	= KHZ2PICOS(25100),
+
+		.left_margin	= 90,		.right_margin	= 70,
+		.upper_margin	= 30,		.lower_margin	= 15,
+		.hsync_len	= 12,		.vsync_len	= 2,
+
+		.sync		= 0,
+		.vmode		= FB_VMODE_NONINTERLACED,
+	},
+};
+
+static struct fb_monspecs __initdata favr32_default_monspecs = {
+	.manufacturer		= "LG",
+	.monitor		= "LB104V03",
+	.modedb			= lb104v03_modes,
+	.modedb_len		= ARRAY_SIZE(lb104v03_modes),
+	.hfmin			= 27273,
+	.hfmax			= 31111,
+	.vfmin			= 45,
+	.vfmax			= 60,
+	.dclkmax		= 28000000,
+};
+
+struct atmel_lcdfb_pdata __initdata favr32_lcdc_data = {
+	.default_bpp		= 16,
+	.default_dmacon		= ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN,
+	.default_lcdcon2	= (ATMEL_LCDC_DISTYPE_TFT
+				   | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE
+				   | ATMEL_LCDC_MEMOR_BIG),
+	.default_monspecs	= &favr32_default_monspecs,
+	.guard_time		= 2,
+};
+
+static struct gpio_led favr32_leds[] = {
+	{
+		.name		 = "green",
+		.gpio		 = GPIO_PIN_PE(19),
+		.default_trigger = "heartbeat",
+		.active_low	 = 1,
+	},
+	{
+		.name		 = "red",
+		.gpio		 = GPIO_PIN_PE(20),
+		.active_low	 = 1,
+	},
+};
+
+static struct gpio_led_platform_data favr32_led_data = {
+	.num_leds	= ARRAY_SIZE(favr32_leds),
+	.leds		= favr32_leds,
+};
+
+static struct platform_device favr32_led_dev = {
+	.name		= "leds-gpio",
+	.id		= 0,
+	.dev		= {
+		.platform_data	= &favr32_led_data,
+	},
+};
+
+/*
+ * The next two functions should go away as the boot loader is
+ * supposed to initialize the macb address registers with a valid
+ * ethernet address. But we need to keep it around for a while until
+ * we can be reasonably sure the boot loader does this.
+ *
+ * The phy_id is ignored as the driver will probe for it.
+ */
+static int __init parse_tag_ethernet(struct tag *tag)
+{
+	int i;
+
+	i = tag->u.ethernet.mac_index;
+	if (i < ARRAY_SIZE(hw_addr))
+		memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
+		       sizeof(hw_addr[i].addr));
+
+	return 0;
+}
+__tagtable(ATAG_ETHERNET, parse_tag_ethernet);
+
+static void __init set_hw_addr(struct platform_device *pdev)
+{
+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	const u8 *addr;
+	void __iomem *regs;
+	struct clk *pclk;
+
+	if (!res)
+		return;
+	if (pdev->id >= ARRAY_SIZE(hw_addr))
+		return;
+
+	addr = hw_addr[pdev->id].addr;
+	if (!is_valid_ether_addr(addr))
+		return;
+
+	/*
+	 * Since this is board-specific code, we'll cheat and use the
+	 * physical address directly as we happen to know that it's
+	 * the same as the virtual address.
+	 */
+	regs = (void __iomem __force *)res->start;
+	pclk = clk_get(&pdev->dev, "pclk");
+	if (IS_ERR(pclk))
+		return;
+
+	clk_enable(pclk);
+	__raw_writel((addr[3] << 24) | (addr[2] << 16)
+		     | (addr[1] << 8) | addr[0], regs + 0x98);
+	__raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
+	clk_disable(pclk);
+	clk_put(pclk);
+}
+
+void __init favr32_setup_leds(void)
+{
+	unsigned i;
+
+	for (i = 0; i < ARRAY_SIZE(favr32_leds); i++)
+		at32_select_gpio(favr32_leds[i].gpio, AT32_GPIOF_OUTPUT);
+
+	platform_device_register(&favr32_led_dev);
+}
+
+static struct pwm_lookup pwm_lookup[] = {
+	PWM_LOOKUP("at91sam9rl-pwm", PWM_BL_CH, "pwm-backlight.0", NULL,
+		   5000, PWM_POLARITY_INVERSED),
+};
+
+static struct regulator_consumer_supply fixed_power_consumers[] = {
+	REGULATOR_SUPPLY("power", "pwm-backlight.0"),
+};
+
+static struct platform_pwm_backlight_data pwm_bl_data = {
+	.enable_gpio		= GPIO_PIN_PA(28),
+	.max_brightness		= 255,
+	.dft_brightness		= 255,
+	.lth_brightness		= 50,
+};
+
+static struct platform_device pwm_bl_device = {
+	.name = "pwm-backlight",
+	.dev = {
+		.platform_data = &pwm_bl_data,
+	},
+};
+
+static void __init favr32_setup_atmel_pwm_bl(void)
+{
+	pwm_add_table(pwm_lookup, ARRAY_SIZE(pwm_lookup));
+	regulator_register_always_on(0, "fixed", fixed_power_consumers,
+				    ARRAY_SIZE(fixed_power_consumers), 3300000);
+	platform_device_register(&pwm_bl_device);
+	at32_select_gpio(pwm_bl_data.enable_gpio, 0);
+}
+
+void __init setup_board(void)
+{
+	at32_map_usart(3, 0, 0);	/* USART 3 => /dev/ttyS0 */
+	at32_setup_serial_console(0);
+}
+
+static int __init set_abdac_rate(struct platform_device *pdev)
+{
+	int retval;
+	struct clk *osc1;
+	struct clk *pll1;
+	struct clk *abdac;
+
+	if (pdev == NULL)
+		return -ENXIO;
+
+	osc1 = clk_get(NULL, "osc1");
+	if (IS_ERR(osc1)) {
+		retval = PTR_ERR(osc1);
+		goto out;
+	}
+
+	pll1 = clk_get(NULL, "pll1");
+	if (IS_ERR(pll1)) {
+		retval = PTR_ERR(pll1);
+		goto out_osc1;
+	}
+
+	abdac = clk_get(&pdev->dev, "sample_clk");
+	if (IS_ERR(abdac)) {
+		retval = PTR_ERR(abdac);
+		goto out_pll1;
+	}
+
+	retval = clk_set_parent(pll1, osc1);
+	if (retval != 0)
+		goto out_abdac;
+
+	/*
+	 * Rate is 32000 to 50000 and ABDAC oversamples 256x. Multiply, in
+	 * power of 2, to a value above 80 MHz. Power of 2 so it is possible
+	 * for the generic clock to divide it down again and 80 MHz is the
+	 * lowest frequency for the PLL.
+	 */
+	retval = clk_round_rate(pll1,
+			CONFIG_BOARD_FAVR32_ABDAC_RATE * 256 * 16);
+	if (retval <= 0) {
+		retval = -EINVAL;
+		goto out_abdac;
+	}
+
+	retval = clk_set_rate(pll1, retval);
+	if (retval != 0)
+		goto out_abdac;
+
+	retval = clk_set_parent(abdac, pll1);
+	if (retval != 0)
+		goto out_abdac;
+
+out_abdac:
+	clk_put(abdac);
+out_pll1:
+	clk_put(pll1);
+out_osc1:
+	clk_put(osc1);
+out:
+	return retval;
+}
+
+static int __init favr32_init(void)
+{
+	/*
+	 * Favr-32 uses 32-bit SDRAM interface. Reserve the SDRAM-specific
+	 * pins so that nobody messes with them.
+	 */
+	at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);
+
+	at32_select_gpio(GPIO_PIN_PB(3), 0);	/* IRQ from ADS7843 */
+
+	at32_add_device_usart(0);
+
+	set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
+
+	spi1_board_info[0].irq = gpio_to_irq(GPIO_PIN_PB(3));
+
+	set_abdac_rate(at32_add_device_abdac(0, &abdac0_data));
+
+	at32_add_device_pwm(1 << PWM_BL_CH);
+	at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
+	at32_add_device_mci(0, &mci0_data);
+	at32_add_device_usba(0, NULL);
+	at32_add_device_lcdc(0, &favr32_lcdc_data, fbmem_start, fbmem_size, 0);
+
+	favr32_setup_leds();
+
+	favr32_setup_atmel_pwm_bl();
+
+	return 0;
+}
+postcore_initcall(favr32_init);