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, 582 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-davinci/board-mityomapl138.c b/kernel/arch/arm/mach-davinci/board-mityomapl138.c
new file mode 100644
index 000000000..8cfbfe084
--- /dev/null
+++ b/kernel/arch/arm/mach-davinci/board-mityomapl138.c
@@ -0,0 +1,582 @@
+/*
+ * Critical Link MityOMAP-L138 SoM
+ *
+ * Copyright (C) 2010 Critical Link LLC - http://www.criticallink.com
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of
+ * any kind, whether express or implied.
+ */
+
+#define pr_fmt(fmt) "MityOMAPL138: " fmt
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/partitions.h>
+#include <linux/regulator/machine.h>
+#include <linux/i2c.h>
+#include <linux/platform_data/at24.h>
+#include <linux/etherdevice.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/flash.h>
+
+#include <asm/io.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <mach/common.h>
+#include <mach/cp_intc.h>
+#include <mach/da8xx.h>
+#include <linux/platform_data/mtd-davinci.h>
+#include <linux/platform_data/mtd-davinci-aemif.h>
+#include <mach/mux.h>
+#include <linux/platform_data/spi-davinci.h>
+
+#define MITYOMAPL138_PHY_ID		""
+
+#define FACTORY_CONFIG_MAGIC	0x012C0138
+#define FACTORY_CONFIG_VERSION	0x00010001
+
+/* Data Held in On-Board I2C device */
+struct factory_config {
+	u32	magic;
+	u32	version;
+	u8	mac[6];
+	u32	fpga_type;
+	u32	spare;
+	u32	serialnumber;
+	char	partnum[32];
+};
+
+static struct factory_config factory_config;
+
+struct part_no_info {
+	const char	*part_no;	/* part number string of interest */
+	int		max_freq;	/* khz */
+};
+
+static struct part_no_info mityomapl138_pn_info[] = {
+	{
+		.part_no	= "L138-C",
+		.max_freq	= 300000,
+	},
+	{
+		.part_no	= "L138-D",
+		.max_freq	= 375000,
+	},
+	{
+		.part_no	= "L138-F",
+		.max_freq	= 456000,
+	},
+	{
+		.part_no	= "1808-C",
+		.max_freq	= 300000,
+	},
+	{
+		.part_no	= "1808-D",
+		.max_freq	= 375000,
+	},
+	{
+		.part_no	= "1808-F",
+		.max_freq	= 456000,
+	},
+	{
+		.part_no	= "1810-D",
+		.max_freq	= 375000,
+	},
+};
+
+#ifdef CONFIG_CPU_FREQ
+static void mityomapl138_cpufreq_init(const char *partnum)
+{
+	int i, ret;
+
+	for (i = 0; partnum && i < ARRAY_SIZE(mityomapl138_pn_info); i++) {
+		/*
+		 * the part number has additional characters beyond what is
+		 * stored in the table.  This information is not needed for
+		 * determining the speed grade, and would require several
+		 * more table entries.  Only check the first N characters
+		 * for a match.
+		 */
+		if (!strncmp(partnum, mityomapl138_pn_info[i].part_no,
+			     strlen(mityomapl138_pn_info[i].part_no))) {
+			da850_max_speed = mityomapl138_pn_info[i].max_freq;
+			break;
+		}
+	}
+
+	ret = da850_register_cpufreq("pll0_sysclk3");
+	if (ret)
+		pr_warn("cpufreq registration failed: %d\n", ret);
+}
+#else
+static void mityomapl138_cpufreq_init(const char *partnum) { }
+#endif
+
+static void read_factory_config(struct memory_accessor *a, void *context)
+{
+	int ret;
+	const char *partnum = NULL;
+	struct davinci_soc_info *soc_info = &davinci_soc_info;
+
+	ret = a->read(a, (char *)&factory_config, 0, sizeof(factory_config));
+	if (ret != sizeof(struct factory_config)) {
+		pr_warn("Read Factory Config Failed: %d\n", ret);
+		goto bad_config;
+	}
+
+	if (factory_config.magic != FACTORY_CONFIG_MAGIC) {
+		pr_warn("Factory Config Magic Wrong (%X)\n",
+			factory_config.magic);
+		goto bad_config;
+	}
+
+	if (factory_config.version != FACTORY_CONFIG_VERSION) {
+		pr_warn("Factory Config Version Wrong (%X)\n",
+			factory_config.version);
+		goto bad_config;
+	}
+
+	pr_info("Found MAC = %pM\n", factory_config.mac);
+	if (is_valid_ether_addr(factory_config.mac))
+		memcpy(soc_info->emac_pdata->mac_addr,
+			factory_config.mac, ETH_ALEN);
+	else
+		pr_warn("Invalid MAC found in factory config block\n");
+
+	partnum = factory_config.partnum;
+	pr_info("Part Number = %s\n", partnum);
+
+bad_config:
+	/* default maximum speed is valid for all platforms */
+	mityomapl138_cpufreq_init(partnum);
+}
+
+static struct at24_platform_data mityomapl138_fd_chip = {
+	.byte_len	= 256,
+	.page_size	= 8,
+	.flags		= AT24_FLAG_READONLY | AT24_FLAG_IRUGO,
+	.setup		= read_factory_config,
+	.context	= NULL,
+};
+
+static struct davinci_i2c_platform_data mityomap_i2c_0_pdata = {
+	.bus_freq	= 100,	/* kHz */
+	.bus_delay	= 0,	/* usec */
+};
+
+/* TPS65023 voltage regulator support */
+/* 1.2V Core */
+static struct regulator_consumer_supply tps65023_dcdc1_consumers[] = {
+	{
+		.supply = "cvdd",
+	},
+};
+
+/* 1.8V */
+static struct regulator_consumer_supply tps65023_dcdc2_consumers[] = {
+	{
+		.supply = "usb0_vdda18",
+	},
+	{
+		.supply = "usb1_vdda18",
+	},
+	{
+		.supply = "ddr_dvdd18",
+	},
+	{
+		.supply = "sata_vddr",
+	},
+};
+
+/* 1.2V */
+static struct regulator_consumer_supply tps65023_dcdc3_consumers[] = {
+	{
+		.supply = "sata_vdd",
+	},
+	{
+		.supply = "usb_cvdd",
+	},
+	{
+		.supply = "pll0_vdda",
+	},
+	{
+		.supply = "pll1_vdda",
+	},
+};
+
+/* 1.8V Aux LDO, not used */
+static struct regulator_consumer_supply tps65023_ldo1_consumers[] = {
+	{
+		.supply = "1.8v_aux",
+	},
+};
+
+/* FPGA VCC Aux (2.5 or 3.3) LDO */
+static struct regulator_consumer_supply tps65023_ldo2_consumers[] = {
+	{
+		.supply = "vccaux",
+	},
+};
+
+static struct regulator_init_data tps65023_regulator_data[] = {
+	/* dcdc1 */
+	{
+		.constraints = {
+			.min_uV = 1150000,
+			.max_uV = 1350000,
+			.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
+					  REGULATOR_CHANGE_STATUS,
+			.boot_on = 1,
+		},
+		.num_consumer_supplies = ARRAY_SIZE(tps65023_dcdc1_consumers),
+		.consumer_supplies = tps65023_dcdc1_consumers,
+	},
+	/* dcdc2 */
+	{
+		.constraints = {
+			.min_uV = 1800000,
+			.max_uV = 1800000,
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+			.boot_on = 1,
+		},
+		.num_consumer_supplies = ARRAY_SIZE(tps65023_dcdc2_consumers),
+		.consumer_supplies = tps65023_dcdc2_consumers,
+	},
+	/* dcdc3 */
+	{
+		.constraints = {
+			.min_uV = 1200000,
+			.max_uV = 1200000,
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+			.boot_on = 1,
+		},
+		.num_consumer_supplies = ARRAY_SIZE(tps65023_dcdc3_consumers),
+		.consumer_supplies = tps65023_dcdc3_consumers,
+	},
+	/* ldo1 */
+	{
+		.constraints = {
+			.min_uV = 1800000,
+			.max_uV = 1800000,
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+			.boot_on = 1,
+		},
+		.num_consumer_supplies = ARRAY_SIZE(tps65023_ldo1_consumers),
+		.consumer_supplies = tps65023_ldo1_consumers,
+	},
+	/* ldo2 */
+	{
+		.constraints = {
+			.min_uV = 2500000,
+			.max_uV = 3300000,
+			.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
+					  REGULATOR_CHANGE_STATUS,
+			.boot_on = 1,
+		},
+		.num_consumer_supplies = ARRAY_SIZE(tps65023_ldo2_consumers),
+		.consumer_supplies = tps65023_ldo2_consumers,
+	},
+};
+
+static struct i2c_board_info __initdata mityomap_tps65023_info[] = {
+	{
+		I2C_BOARD_INFO("tps65023", 0x48),
+		.platform_data = &tps65023_regulator_data[0],
+	},
+	{
+		I2C_BOARD_INFO("24c02", 0x50),
+		.platform_data = &mityomapl138_fd_chip,
+	},
+};
+
+static int __init pmic_tps65023_init(void)
+{
+	return i2c_register_board_info(1, mityomap_tps65023_info,
+					ARRAY_SIZE(mityomap_tps65023_info));
+}
+
+/*
+ * SPI Devices:
+ *	SPI1_CS0: 8M Flash ST-M25P64-VME6G
+ */
+static struct mtd_partition spi_flash_partitions[] = {
+	[0] = {
+		.name		= "ubl",
+		.offset		= 0,
+		.size		= SZ_64K,
+		.mask_flags	= MTD_WRITEABLE,
+	},
+	[1] = {
+		.name		= "u-boot",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= SZ_512K,
+		.mask_flags	= MTD_WRITEABLE,
+	},
+	[2] = {
+		.name		= "u-boot-env",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= SZ_64K,
+		.mask_flags	= MTD_WRITEABLE,
+	},
+	[3] = {
+		.name		= "periph-config",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= SZ_64K,
+		.mask_flags	= MTD_WRITEABLE,
+	},
+	[4] = {
+		.name		= "reserved",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= SZ_256K + SZ_64K,
+	},
+	[5] = {
+		.name		= "kernel",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= SZ_2M + SZ_1M,
+	},
+	[6] = {
+		.name		= "fpga",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= SZ_2M,
+	},
+	[7] = {
+		.name		= "spare",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= MTDPART_SIZ_FULL,
+	},
+};
+
+static struct flash_platform_data mityomapl138_spi_flash_data = {
+	.name		= "m25p80",
+	.parts		= spi_flash_partitions,
+	.nr_parts	= ARRAY_SIZE(spi_flash_partitions),
+	.type		= "m24p64",
+};
+
+static struct davinci_spi_config spi_eprom_config = {
+	.io_type	= SPI_IO_TYPE_DMA,
+	.c2tdelay	= 8,
+	.t2cdelay	= 8,
+};
+
+static struct spi_board_info mityomapl138_spi_flash_info[] = {
+	{
+		.modalias		= "m25p80",
+		.platform_data		= &mityomapl138_spi_flash_data,
+		.controller_data	= &spi_eprom_config,
+		.mode			= SPI_MODE_0,
+		.max_speed_hz		= 30000000,
+		.bus_num		= 1,
+		.chip_select		= 0,
+	},
+};
+
+/*
+ * MityDSP-L138 includes a 256 MByte large-page NAND flash
+ * (128K blocks).
+ */
+static struct mtd_partition mityomapl138_nandflash_partition[] = {
+	{
+		.name		= "rootfs",
+		.offset		= 0,
+		.size		= SZ_128M,
+		.mask_flags	= 0, /* MTD_WRITEABLE, */
+	},
+	{
+		.name		= "homefs",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= MTDPART_SIZ_FULL,
+		.mask_flags	= 0,
+	},
+};
+
+static struct davinci_nand_pdata mityomapl138_nandflash_data = {
+	.parts		= mityomapl138_nandflash_partition,
+	.nr_parts	= ARRAY_SIZE(mityomapl138_nandflash_partition),
+	.ecc_mode	= NAND_ECC_HW,
+	.bbt_options	= NAND_BBT_USE_FLASH,
+	.options	= NAND_BUSWIDTH_16,
+	.ecc_bits	= 1, /* 4 bit mode is not supported with 16 bit NAND */
+};
+
+static struct resource mityomapl138_nandflash_resource[] = {
+	{
+		.start	= DA8XX_AEMIF_CS3_BASE,
+		.end	= DA8XX_AEMIF_CS3_BASE + SZ_512K + 2 * SZ_1K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.start	= DA8XX_AEMIF_CTL_BASE,
+		.end	= DA8XX_AEMIF_CTL_BASE + SZ_32K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct platform_device mityomapl138_nandflash_device = {
+	.name		= "davinci_nand",
+	.id		= 1,
+	.dev		= {
+		.platform_data	= &mityomapl138_nandflash_data,
+	},
+	.num_resources	= ARRAY_SIZE(mityomapl138_nandflash_resource),
+	.resource	= mityomapl138_nandflash_resource,
+};
+
+static struct platform_device *mityomapl138_devices[] __initdata = {
+	&mityomapl138_nandflash_device,
+};
+
+static void __init mityomapl138_setup_nand(void)
+{
+	platform_add_devices(mityomapl138_devices,
+				 ARRAY_SIZE(mityomapl138_devices));
+
+	if (davinci_aemif_setup(&mityomapl138_nandflash_device))
+		pr_warn("%s: Cannot configure AEMIF\n", __func__);
+}
+
+static const short mityomap_mii_pins[] = {
+	DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
+	DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
+	DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
+	DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0, DA850_MDIO_CLK,
+	DA850_MDIO_D,
+	-1
+};
+
+static const short mityomap_rmii_pins[] = {
+	DA850_RMII_TXD_0, DA850_RMII_TXD_1, DA850_RMII_TXEN,
+	DA850_RMII_CRS_DV, DA850_RMII_RXD_0, DA850_RMII_RXD_1,
+	DA850_RMII_RXER, DA850_RMII_MHZ_50_CLK, DA850_MDIO_CLK,
+	DA850_MDIO_D,
+	-1
+};
+
+static void __init mityomapl138_config_emac(void)
+{
+	void __iomem *cfg_chip3_base;
+	int ret;
+	u32 val;
+	struct davinci_soc_info *soc_info = &davinci_soc_info;
+
+	soc_info->emac_pdata->rmii_en = 0; /* hardcoded for now */
+
+	cfg_chip3_base = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
+	val = __raw_readl(cfg_chip3_base);
+
+	if (soc_info->emac_pdata->rmii_en) {
+		val |= BIT(8);
+		ret = davinci_cfg_reg_list(mityomap_rmii_pins);
+		pr_info("RMII PHY configured\n");
+	} else {
+		val &= ~BIT(8);
+		ret = davinci_cfg_reg_list(mityomap_mii_pins);
+		pr_info("MII PHY configured\n");
+	}
+
+	if (ret) {
+		pr_warn("mii/rmii mux setup failed: %d\n", ret);
+		return;
+	}
+
+	/* configure the CFGCHIP3 register for RMII or MII */
+	__raw_writel(val, cfg_chip3_base);
+
+	soc_info->emac_pdata->phy_id = MITYOMAPL138_PHY_ID;
+
+	ret = da8xx_register_emac();
+	if (ret)
+		pr_warn("emac registration failed: %d\n", ret);
+}
+
+static struct davinci_pm_config da850_pm_pdata = {
+	.sleepcount = 128,
+};
+
+static struct platform_device da850_pm_device = {
+	.name	= "pm-davinci",
+	.dev = {
+		.platform_data  = &da850_pm_pdata,
+	},
+	.id	= -1,
+};
+
+static void __init mityomapl138_init(void)
+{
+	int ret;
+
+	/* for now, no special EDMA channels are reserved */
+	ret = da850_register_edma(NULL);
+	if (ret)
+		pr_warn("edma registration failed: %d\n", ret);
+
+	ret = da8xx_register_watchdog();
+	if (ret)
+		pr_warn("watchdog registration failed: %d\n", ret);
+
+	davinci_serial_init(da8xx_serial_device);
+
+	ret = da8xx_register_i2c(0, &mityomap_i2c_0_pdata);
+	if (ret)
+		pr_warn("i2c0 registration failed: %d\n", ret);
+
+	ret = pmic_tps65023_init();
+	if (ret)
+		pr_warn("TPS65023 PMIC init failed: %d\n", ret);
+
+	mityomapl138_setup_nand();
+
+	ret = spi_register_board_info(mityomapl138_spi_flash_info,
+				      ARRAY_SIZE(mityomapl138_spi_flash_info));
+	if (ret)
+		pr_warn("spi info registration failed: %d\n", ret);
+
+	ret = da8xx_register_spi_bus(1,
+				     ARRAY_SIZE(mityomapl138_spi_flash_info));
+	if (ret)
+		pr_warn("spi 1 registration failed: %d\n", ret);
+
+	mityomapl138_config_emac();
+
+	ret = da8xx_register_rtc();
+	if (ret)
+		pr_warn("rtc setup failed: %d\n", ret);
+
+	ret = da8xx_register_cpuidle();
+	if (ret)
+		pr_warn("cpuidle registration failed: %d\n", ret);
+
+	ret = da850_register_pm(&da850_pm_device);
+	if (ret)
+		pr_warn("suspend registration failed: %d\n", ret);
+}
+
+#ifdef CONFIG_SERIAL_8250_CONSOLE
+static int __init mityomapl138_console_init(void)
+{
+	if (!machine_is_mityomapl138())
+		return 0;
+
+	return add_preferred_console("ttyS", 1, "115200");
+}
+console_initcall(mityomapl138_console_init);
+#endif
+
+static void __init mityomapl138_map_io(void)
+{
+	da850_init();
+}
+
+MACHINE_START(MITYOMAPL138, "MityDSP-L138/MityARM-1808")
+	.atag_offset	= 0x100,
+	.map_io		= mityomapl138_map_io,
+	.init_irq	= cp_intc_init,
+	.init_time	= davinci_timer_init,
+	.init_machine	= mityomapl138_init,
+	.init_late	= davinci_init_late,
+	.dma_zone_size	= SZ_128M,
+	.restart	= da8xx_restart,
+MACHINE_END