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
  15 #include <asm/mach/arch.h>
  16 #include <asm/hardware/gic.h>
  17 #include <mach/map.h>
  18
  19 #include <plat/cpu.h>
  20 #include <plat/regs-serial.h>
  21
  22 #include "common.h"
  23
  24 /*
  25  * The following lookup table is used to override device names when devices
  26  * are registered from device tree. This is temporarily added to enable
  27  * device tree support addition for the EXYNOS5 architecture.
  28  *
  29  * For drivers that require platform data to be provided from the machine
  30  * file, a platform data pointer can also be supplied along with the
  31  * devices names. Usually, the platform data elements that cannot be parsed
  32  * from the device tree by the drivers (example: function pointers) are
  33  * supplied. But it should be noted that this is a temporary mechanism and
  34  * at some point, the drivers should be capable of parsing all the platform
  35  * data from the device tree.
  36  */
  37 static const struct of_dev_auxdata exynos5250_auxdata_lookup[] __initconst = {
  38         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART0,
  39                                 "exynos4210-uart.0", NULL),
  40         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART1,
  41                                 "exynos4210-uart.1", NULL),
  42         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART2,
  43                                 "exynos4210-uart.2", NULL),
  44         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART3,
  45                                 "exynos4210-uart.3", NULL),
  46         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(0),
  47                                 "s3c2440-i2c.0", NULL),
  48         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(1),
  49                                 "s3c2440-i2c.1", NULL),
  50         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI0,
  51                                 "dw_mmc.0", NULL),
  52         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI1,
  53                                 "dw_mmc.1", NULL),
  54         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI2,
  55                                 "dw_mmc.2", NULL),
  56         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI3,
  57                                 "dw_mmc.3", NULL),
  58         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI0,
  59                                 "exynos4210-spi.0", NULL),
  60         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI1,
  61                                 "exynos4210-spi.1", NULL),
  62         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI2,
  63                                 "exynos4210-spi.2", NULL),
  64         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA0, "dma-pl330.0", NULL),
  65         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA1, "dma-pl330.1", NULL),
  66         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_MDMA1, "dma-pl330.2", NULL),
  67         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC0,
  68                                 "exynos-gsc.0", NULL),
  69         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC1,
  70                                 "exynos-gsc.1", NULL),
  71         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC2,
  72                                 "exynos-gsc.2", NULL),
  73         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC3,
  74                                 "exynos-gsc.3", NULL),
  75         {},
  76 };
  77
  78 static void __init exynos5250_dt_map_io(void)
  79 {
  80         exynos_init_io(NULL, 0);
  81         s3c24xx_init_clocks(24000000);
  82 }
  83
  84 static void __init exynos5250_dt_machine_init(void)
  85 {
  86         of_platform_populate(NULL, of_default_bus_match_table,
  87                                 exynos5250_auxdata_lookup, NULL);
  88 }
  89
  90 static char const *exynos5250_dt_compat[] __initdata = {
  91         "samsung,exynos5250",
  92         NULL
  93 };
  94
  95 DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
  96         /* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
  97         .init_irq       = exynos5_init_irq,
  98         .smp            = smp_ops(exynos_smp_ops),
  99         .map_io         = exynos5250_dt_map_io,
 100         .handle_irq     = gic_handle_irq,
 101         .init_machine   = exynos5250_dt_machine_init,
 102         .init_late      = exynos_init_late,
 103         .timer          = &exynos4_timer,
 104         .dt_compat      = exynos5250_dt_compat,
 105         .restart        = exynos5_restart,
 106 MACHINE_END