arch/arm/mach-exynos/mach-exynos5-dt.c

   1 /*
   2  * SAMSUNG EXYNOS5250 Flattened Device Tree enabled machine
   3  *
   4  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   5  *              http://www.samsung.com
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10 */
  11
  12 #include <linux/of_platform.h>
  13 #include <linux/of_fdt.h>
  14 #include <linux/serial_core.h>
  15
  16 #include <asm/mach/arch.h>
  17 #include <asm/hardware/gic.h>
  18 #include <mach/map.h>
  19
  20 #include <plat/cpu.h>
  21 #include <plat/regs-serial.h>
  22
  23 #include "common.h"
  24
  25 /*
  26  * The following lookup table is used to override device names when devices
  27  * are registered from device tree. This is temporarily added to enable
  28  * device tree support addition for the EXYNOS5 architecture.
  29  *
  30  * For drivers that require platform data to be provided from the machine
  31  * file, a platform data pointer can also be supplied along with the
  32  * devices names. Usually, the platform data elements that cannot be parsed
  33  * from the device tree by the drivers (example: function pointers) are
  34  * supplied. But it should be noted that this is a temporary mechanism and
  35  * at some point, the drivers should be capable of parsing all the platform
  36  * data from the device tree.
  37  */
  38 static const struct of_dev_auxdata exynos5250_auxdata_lookup[] __initconst = {
  39         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART0,
  40                                 "exynos4210-uart.0", NULL),
  41         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART1,
  42                                 "exynos4210-uart.1", NULL),
  43         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART2,
  44                                 "exynos4210-uart.2", NULL),
  45         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART3,
  46                                 "exynos4210-uart.3", NULL),
  47         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(0),
  48                                 "s3c2440-i2c.0", NULL),
  49         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(1),
  50                                 "s3c2440-i2c.1", NULL),
  51         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI0,
  52                                 "dw_mmc.0", NULL),
  53         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI1,
  54                                 "dw_mmc.1", NULL),
  55         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI2,
  56                                 "dw_mmc.2", NULL),
  57         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI3,
  58                                 "dw_mmc.3", NULL),
  59         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI0,
  60                                 "exynos4210-spi.0", NULL),
  61         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI1,
  62                                 "exynos4210-spi.1", NULL),
  63         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI2,
  64                                 "exynos4210-spi.2", NULL),
  65         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA0, "dma-pl330.0", NULL),
  66         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA1, "dma-pl330.1", NULL),
  67         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_MDMA1, "dma-pl330.2", NULL),
  68         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC0,
  69                                 "exynos-gsc.0", NULL),
  70         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC1,
  71                                 "exynos-gsc.1", NULL),
  72         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC2,
  73                                 "exynos-gsc.2", NULL),
  74         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC3,
  75                                 "exynos-gsc.3", NULL),
  76         {},
  77 };
  78
  79 static const struct of_dev_auxdata exynos5440_auxdata_lookup[] __initconst = {
  80         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5440_PA_UART0,
  81                                 "exynos4210-uart.0", NULL),
  82         {},
  83 };
  84
  85 static void __init exynos5_dt_map_io(void)
  86 {
  87         unsigned long root = of_get_flat_dt_root();
  88
  89         exynos_init_io(NULL, 0);
  90
  91         if (of_flat_dt_is_compatible(root, "samsung,exynos5250"))
  92                 s3c24xx_init_clocks(24000000);
  93 }
  94
  95 static void __init exynos5_dt_machine_init(void)
  96 {
  97         if (of_machine_is_compatible("samsung,exynos5250"))
  98                 of_platform_populate(NULL, of_default_bus_match_table,
  99                                      exynos5250_auxdata_lookup, NULL);
 100         else if (of_machine_is_compatible("samsung,exynos5440"))
 101                 of_platform_populate(NULL, of_default_bus_match_table,
 102                                      exynos5440_auxdata_lookup, NULL);
 103 }
 104
 105 static char const *exynos5_dt_compat[] __initdata = {
 106         "samsung,exynos5250",
 107         "samsung,exynos5440",
 108         NULL
 109 };
 110
 111 DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
 112         /* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
 113         .init_irq       = exynos5_init_irq,
 114         .smp            = smp_ops(exynos_smp_ops),
 115         .map_io         = exynos5_dt_map_io,
 116         .handle_irq     = gic_handle_irq,
 117         .init_machine   = exynos5_dt_machine_init,
 118         .init_late      = exynos_init_late,
 119         .timer          = &exynos4_timer,
 120         .dt_compat      = exynos5_dt_compat,
 121         .restart        = exynos5_restart,
 122 MACHINE_END