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/serial_core.h>
  14 #include <linux/memblock.h>
  15 #include <linux/of_fdt.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 #include <plat/mfc.h>
  24
  25 #include "common.h"
  26
  27 /*
  28  * The following lookup table is used to override device names when devices
  29  * are registered from device tree. This is temporarily added to enable
  30  * device tree support addition for the EXYNOS5 architecture.
  31  *
  32  * For drivers that require platform data to be provided from the machine
  33  * file, a platform data pointer can also be supplied along with the
  34  * devices names. Usually, the platform data elements that cannot be parsed
  35  * from the device tree by the drivers (example: function pointers) are
  36  * supplied. But it should be noted that this is a temporary mechanism and
  37  * at some point, the drivers should be capable of parsing all the platform
  38  * data from the device tree.
  39  */
  40 static const struct of_dev_auxdata exynos5250_auxdata_lookup[] __initconst = {
  41         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART0,
  42                                 "exynos4210-uart.0", NULL),
  43         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART1,
  44                                 "exynos4210-uart.1", NULL),
  45         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART2,
  46                                 "exynos4210-uart.2", NULL),
  47         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART3,
  48                                 "exynos4210-uart.3", NULL),
  49         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(0),
  50                                 "s3c2440-i2c.0", NULL),
  51         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(1),
  52                                 "s3c2440-i2c.1", NULL),
  53         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI0,
  54                                 "dw_mmc.0", NULL),
  55         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI1,
  56                                 "dw_mmc.1", NULL),
  57         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI2,
  58                                 "dw_mmc.2", NULL),
  59         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI3,
  60                                 "dw_mmc.3", NULL),
  61         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI0,
  62                                 "exynos4210-spi.0", NULL),
  63         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI1,
  64                                 "exynos4210-spi.1", NULL),
  65         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI2,
  66                                 "exynos4210-spi.2", NULL),
  67         OF_DEV_AUXDATA("samsung,exynos5-sata-ahci", 0x122F0000,
  68                                 "exynos5-sata", NULL),
  69         OF_DEV_AUXDATA("samsung,exynos5-sata-phy", 0x12170000,
  70                                 "exynos5-sata-phy", NULL),
  71         OF_DEV_AUXDATA("samsung,exynos5-sata-phy-i2c", 0x121D0000,
  72                                 "exynos5-sata-phy-i2c", NULL),
  73         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA0, "dma-pl330.0", NULL),
  74         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA1, "dma-pl330.1", NULL),
  75         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_MDMA1, "dma-pl330.2", NULL),
  76         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC0,
  77                                 "exynos-gsc.0", NULL),
  78         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC1,
  79                                 "exynos-gsc.1", NULL),
  80         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC2,
  81                                 "exynos-gsc.2", NULL),
  82         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC3,
  83                                 "exynos-gsc.3", NULL),
  84         OF_DEV_AUXDATA("samsung,mfc-v6", 0x11000000, "s5p-mfc-v6", NULL),
  85         OF_DEV_AUXDATA("samsung,exynos5250-tmu", 0x10060000,
  86                                 "exynos-tmu", NULL),
  87         {},
  88 };
  89
  90 static void __init exynos5250_dt_map_io(void)
  91 {
  92         exynos_init_io(NULL, 0);
  93         s3c24xx_init_clocks(24000000);
  94 }
  95
  96 static void __init exynos5250_dt_machine_init(void)
  97 {
  98         of_platform_populate(NULL, of_default_bus_match_table,
  99                                 exynos5250_auxdata_lookup, NULL);
 100 }
 101
 102 static char const *exynos5250_dt_compat[] __initdata = {
 103         "samsung,exynos5250",
 104         NULL
 105 };
 106
 107 static void __init exynos5_reserve(void)
 108 {
 109         struct s5p_mfc_dt_meminfo mfc_mem;
 110
 111         /* Reserve memory for MFC only if it's available */
 112         mfc_mem.compatible = "samsung,mfc-v6";
 113         if (of_scan_flat_dt(s5p_fdt_find_mfc_mem, &mfc_mem))
 114                 s5p_mfc_reserve_mem(mfc_mem.roff, mfc_mem.rsize, mfc_mem.loff,
 115                                 mfc_mem.lsize);
 116 }
 117
 118 DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
 119         /* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
 120         .init_irq       = exynos5_init_irq,
 121         .smp            = smp_ops(exynos_smp_ops),
 122         .map_io         = exynos5250_dt_map_io,
 123         .handle_irq     = gic_handle_irq,
 124         .init_machine   = exynos5250_dt_machine_init,
 125         .init_late      = exynos_init_late,
 126         .timer          = &exynos4_timer,
 127         .dt_compat      = exynos5250_dt_compat,
 128         .restart        = exynos5_restart,
 129         .reserve        = exynos5_reserve,
 130 MACHINE_END