arch/arm/mach-exynos/mach-exynos4-dt.c

   1 /*
   2  * Samsung's EXYNOS4 flattened device tree enabled machine
   3  *
   4  * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
   5  *              http://www.samsung.com
   6  * Copyright (c) 2010-2011 Linaro Ltd.
   7  *              www.linaro.org
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12 */
  13
  14 #include <linux/of_platform.h>
  15 #include <linux/serial_core.h>
  16
  17 #include <asm/mach/arch.h>
  18 #include <asm/hardware/gic.h>
  19 #include <mach/map.h>
  20
  21 #include <plat/cpu.h>
  22 #include <plat/regs-serial.h>
  23
  24 #include "common.h"
  25
  26 /*
  27  * The following lookup table is used to override device names when devices
  28  * are registered from device tree. This is temporarily added to enable
  29  * device tree support addition for the Exynos4 architecture.
  30  *
  31  * For drivers that require platform data to be provided from the machine
  32  * file, a platform data pointer can also be supplied along with the
  33  * devices names. Usually, the platform data elements that cannot be parsed
  34  * from the device tree by the drivers (example: function pointers) are
  35  * supplied. But it should be noted that this is a temporary mechanism and
  36  * at some point, the drivers should be capable of parsing all the platform
  37  * data from the device tree.
  38  */
  39 static const struct of_dev_auxdata exynos4_auxdata_lookup[] __initconst = {
  40         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS4_PA_UART0,
  41                                 "exynos4210-uart.0", NULL),
  42         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS4_PA_UART1,
  43                                 "exynos4210-uart.1", NULL),
  44         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS4_PA_UART2,
  45                                 "exynos4210-uart.2", NULL),
  46         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS4_PA_UART3,
  47                                 "exynos4210-uart.3", NULL),
  48         OF_DEV_AUXDATA("samsung,exynos4210-sdhci", EXYNOS4_PA_HSMMC(0),
  49                                 "exynos4-sdhci.0", NULL),
  50         OF_DEV_AUXDATA("samsung,exynos4210-sdhci", EXYNOS4_PA_HSMMC(1),
  51                                 "exynos4-sdhci.1", NULL),
  52         OF_DEV_AUXDATA("samsung,exynos4210-sdhci", EXYNOS4_PA_HSMMC(2),
  53                                 "exynos4-sdhci.2", NULL),
  54         OF_DEV_AUXDATA("samsung,exynos4210-sdhci", EXYNOS4_PA_HSMMC(3),
  55                                 "exynos4-sdhci.3", NULL),
  56         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(0),
  57                                 "s3c2440-i2c.0", NULL),
  58         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(1),
  59                                 "s3c2440-i2c.1", NULL),
  60         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(2),
  61                                 "s3c2440-i2c.2", NULL),
  62         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(3),
  63                                 "s3c2440-i2c.3", NULL),
  64         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(4),
  65                                 "s3c2440-i2c.4", NULL),
  66         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(5),
  67                                 "s3c2440-i2c.5", NULL),
  68         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(6),
  69                                 "s3c2440-i2c.6", NULL),
  70         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(7),
  71                                 "s3c2440-i2c.7", NULL),
  72         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS4_PA_SPI0,
  73                                 "exynos4210-spi.0", NULL),
  74         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS4_PA_SPI1,
  75                                 "exynos4210-spi.1", NULL),
  76         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS4_PA_SPI2,
  77                                 "exynos4210-spi.2", NULL),
  78         OF_DEV_AUXDATA("arm,pl330", EXYNOS4_PA_PDMA0, "dma-pl330.0", NULL),
  79         OF_DEV_AUXDATA("arm,pl330", EXYNOS4_PA_PDMA1, "dma-pl330.1", NULL),
  80         {},
  81 };
  82
  83 static void __init exynos4_dt_map_io(void)
  84 {
  85         exynos_init_io(NULL, 0);
  86         s3c24xx_init_clocks(24000000);
  87 }
  88
  89 static void __init exynos4_dt_machine_init(void)
  90 {
  91         of_platform_populate(NULL, of_default_bus_match_table,
  92                                 exynos4_auxdata_lookup, NULL);
  93 }
  94
  95 static char const *exynos4_dt_compat[] __initdata = {
  96         "samsung,exynos4210",
  97         NULL
  98 };
  99
 100 DT_MACHINE_START(EXYNOS4210_DT, "Samsung Exynos4 (Flattened Device Tree)")
 101         /* Maintainer: Thomas Abraham <thomas.abraham@linaro.org> */
 102         .smp            = smp_ops(exynos_smp_ops),
 103         .init_irq       = exynos4_init_irq,
 104         .map_io         = exynos4_dt_map_io,
 105         .handle_irq     = gic_handle_irq,
 106         .init_machine   = exynos4_dt_machine_init,
 107         .init_late      = exynos_init_late,
 108         .timer          = &exynos4_timer,
 109         .dt_compat      = exynos4_dt_compat,
 110         .restart        = exynos4_restart,
 111 MACHINE_END