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 #include <linux/memblock.h>
  16 #include <linux/of_fdt.h>
  17
  18 #include <asm/mach/arch.h>
  19 #include <asm/hardware/gic.h>
  20 #include <mach/map.h>
  21
  22 #include <plat/cpu.h>
  23 #include <plat/regs-serial.h>
  24 #include <plat/mfc.h>
  25
  26 #include "common.h"
  27
  28 /*
  29  * The following lookup table is used to override device names when devices
  30  * are registered from device tree. This is temporarily added to enable
  31  * device tree support addition for the EXYNOS5 architecture.
  32  *
  33  * For drivers that require platform data to be provided from the machine
  34  * file, a platform data pointer can also be supplied along with the
  35  * devices names. Usually, the platform data elements that cannot be parsed
  36  * from the device tree by the drivers (example: function pointers) are
  37  * supplied. But it should be noted that this is a temporary mechanism and
  38  * at some point, the drivers should be capable of parsing all the platform
  39  * data from the device tree.
  40  */
  41 static const struct of_dev_auxdata exynos5250_auxdata_lookup[] __initconst = {
  42         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART0,
  43                                 "exynos4210-uart.0", NULL),
  44         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART1,
  45                                 "exynos4210-uart.1", NULL),
  46         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART2,
  47                                 "exynos4210-uart.2", NULL),
  48         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART3,
  49                                 "exynos4210-uart.3", NULL),
  50         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(0),
  51                                 "s3c2440-i2c.0", NULL),
  52         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(1),
  53                                 "s3c2440-i2c.1", NULL),
  54         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(2),
  55                                 "s3c2440-i2c.2", NULL),
  56         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(3),
  57                                 "s3c2440-i2c.3", NULL),
  58         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(4),
  59                                 "s3c2440-i2c.4", NULL),
  60         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(5),
  61                                 "s3c2440-i2c.5", NULL),
  62         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(6),
  63                                 "s3c2440-i2c.6", NULL),
  64         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(7),
  65                                 "s3c2440-i2c.7", NULL),
  66         OF_DEV_AUXDATA("samsung,s3c2440-hdmiphy-i2c", EXYNOS5_PA_IIC(8),
  67                                 "s3c2440-hdmiphy-i2c", NULL),
  68         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI0,
  69                                 "dw_mmc.0", NULL),
  70         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI1,
  71                                 "dw_mmc.1", NULL),
  72         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI2,
  73                                 "dw_mmc.2", NULL),
  74         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI3,
  75                                 "dw_mmc.3", NULL),
  76         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI0,
  77                                 "exynos4210-spi.0", NULL),
  78         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI1,
  79                                 "exynos4210-spi.1", NULL),
  80         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI2,
  81                                 "exynos4210-spi.2", NULL),
  82         OF_DEV_AUXDATA("samsung,exynos5-sata-ahci", 0x122F0000,
  83                                 "exynos5-sata", NULL),
  84         OF_DEV_AUXDATA("samsung,exynos5-sata-phy", 0x12170000,
  85                                 "exynos5-sata-phy", NULL),
  86         OF_DEV_AUXDATA("samsung,exynos5-sata-phy-i2c", 0x121D0000,
  87                                 "exynos5-sata-phy-i2c", NULL),
  88         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA0, "dma-pl330.0", NULL),
  89         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA1, "dma-pl330.1", NULL),
  90         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_MDMA1, "dma-pl330.2", NULL),
  91         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC0,
  92                                 "exynos-gsc.0", NULL),
  93         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC1,
  94                                 "exynos-gsc.1", NULL),
  95         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC2,
  96                                 "exynos-gsc.2", NULL),
  97         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC3,
  98                                 "exynos-gsc.3", NULL),
  99         OF_DEV_AUXDATA("samsung,exynos5-hdmi", 0x14530000,
 100                                 "exynos5-hdmi", NULL),
 101         OF_DEV_AUXDATA("samsung,exynos5-mixer", 0x14450000,
 102                                 "exynos5-mixer", NULL),
 103         OF_DEV_AUXDATA("samsung,mfc-v6", 0x11000000, "s5p-mfc-v6", NULL),
 104         OF_DEV_AUXDATA("samsung,exynos5250-tmu", 0x10060000,
 105                                 "exynos-tmu", NULL),
 106         {},
 107 };
 108
 109 static const struct of_dev_auxdata exynos5440_auxdata_lookup[] __initconst = {
 110         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5440_PA_UART0,
 111                                 "exynos4210-uart.0", NULL),
 112         {},
 113 };
 114
 115 static void __init exynos5_dt_map_io(void)
 116 {
 117         unsigned long root = of_get_flat_dt_root();
 118
 119         exynos_init_io(NULL, 0);
 120
 121         if (of_flat_dt_is_compatible(root, "samsung,exynos5250"))
 122                 s3c24xx_init_clocks(24000000);
 123 }
 124
 125 static void __init exynos5_dt_machine_init(void)
 126 {
 127         if (of_machine_is_compatible("samsung,exynos5250"))
 128                 of_platform_populate(NULL, of_default_bus_match_table,
 129                                      exynos5250_auxdata_lookup, NULL);
 130         else if (of_machine_is_compatible("samsung,exynos5440"))
 131                 of_platform_populate(NULL, of_default_bus_match_table,
 132                                      exynos5440_auxdata_lookup, NULL);
 133 }
 134
 135 static char const *exynos5_dt_compat[] __initdata = {
 136         "samsung,exynos5250",
 137         "samsung,exynos5440",
 138         NULL
 139 };
 140
 141 static void __init exynos5_reserve(void)
 142 {
 143         struct s5p_mfc_dt_meminfo mfc_mem;
 144
 145         /* Reserve memory for MFC only if it's available */
 146         mfc_mem.compatible = "samsung,mfc-v6";
 147         if (of_scan_flat_dt(s5p_fdt_find_mfc_mem, &mfc_mem))
 148                 s5p_mfc_reserve_mem(mfc_mem.roff, mfc_mem.rsize, mfc_mem.loff,
 149                                 mfc_mem.lsize);
 150 }
 151
 152 DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
 153         /* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
 154         .init_irq       = exynos5_init_irq,
 155         .smp            = smp_ops(exynos_smp_ops),
 156         .map_io         = exynos5_dt_map_io,
 157         .handle_irq     = gic_handle_irq,
 158         .init_machine   = exynos5_dt_machine_init,
 159         .init_late      = exynos_init_late,
 160         .timer          = &exynos4_timer,
 161         .dt_compat      = exynos5_dt_compat,
 162         .restart        = exynos5_restart,
 163         .reserve        = exynos5_reserve,
 164 MACHINE_END