arch/arm/mach-s3c24xx/mach-s3c2416-dt.c

   1 /*
   2  * Samsung's S3C2416 flattened device tree enabled machine
   3  *
   4  * Copyright (c) 2012 Heiko Stuebner <heiko@sntech.de>
   5  *
   6  * based on mach-exynos/mach-exynos4-dt.c
   7  *
   8  * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
   9  *              http://www.samsung.com
  10  * Copyright (c) 2010-2011 Linaro Ltd.
  11  *              www.linaro.org
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License version 2 as
  15  * published by the Free Software Foundation.
  16 */
  17
  18 #include <linux/clocksource.h>
  19 #include <linux/irqchip.h>
  20 #include <linux/of_platform.h>
  21 #include <linux/serial_core.h>
  22
  23 #include <asm/mach/arch.h>
  24 #include <mach/map.h>
  25
  26 #include <plat/cpu.h>
  27 #include <plat/pm.h>
  28 #include <plat/regs-serial.h>
  29
  30 #include "common.h"
  31
  32 /*
  33  * The following lookup table is used to override device names when devices
  34  * are registered from device tree. This is temporarily added to enable
  35  * device tree support addition for the S3C2416 architecture.
  36  *
  37  * For drivers that require platform data to be provided from the machine
  38  * file, a platform data pointer can also be supplied along with the
  39  * devices names. Usually, the platform data elements that cannot be parsed
  40  * from the device tree by the drivers (example: function pointers) are
  41  * supplied. But it should be noted that this is a temporary mechanism and
  42  * at some point, the drivers should be capable of parsing all the platform
  43  * data from the device tree.
  44  */
  45 static const struct of_dev_auxdata s3c2416_auxdata_lookup[] __initconst = {
  46         OF_DEV_AUXDATA("samsung,s3c2440-uart", S3C24XX_PA_UART,
  47                                 "s3c2440-uart.0", NULL),
  48         OF_DEV_AUXDATA("samsung,s3c2440-uart", S3C24XX_PA_UART + 0x4000,
  49                                 "s3c2440-uart.1", NULL),
  50         OF_DEV_AUXDATA("samsung,s3c2440-uart", S3C24XX_PA_UART + 0x8000,
  51                                 "s3c2440-uart.2", NULL),
  52         OF_DEV_AUXDATA("samsung,s3c2440-uart", S3C24XX_PA_UART + 0xC000,
  53                                 "s3c2440-uart.3", NULL),
  54         OF_DEV_AUXDATA("samsung,s3c6410-sdhci", S3C_PA_HSMMC0,
  55                                 "s3c-sdhci.0", NULL),
  56         OF_DEV_AUXDATA("samsung,s3c6410-sdhci", S3C_PA_HSMMC1,
  57                                 "s3c-sdhci.1", NULL),
  58         OF_DEV_AUXDATA("samsung,s3c2440-i2c", S3C_PA_IIC,
  59                                 "s3c2440-i2c.0", NULL),
  60         {},
  61 };
  62
  63 static void __init s3c2416_dt_map_io(void)
  64 {
  65         s3c24xx_init_io(NULL, 0);
  66         s3c24xx_init_clocks(12000000);
  67 }
  68
  69 static void __init s3c2416_dt_machine_init(void)
  70 {
  71         of_platform_populate(NULL, of_default_bus_match_table,
  72                                 s3c2416_auxdata_lookup, NULL);
  73
  74         s3c_pm_init();
  75 }
  76
  77 static char const *s3c2416_dt_compat[] __initdata = {
  78         "samsung,s3c2416",
  79         "samsung,s3c2450",
  80         NULL
  81 };
  82
  83 DT_MACHINE_START(S3C2416_DT, "Samsung S3C2416 (Flattened Device Tree)")
  84         /* Maintainer: Heiko Stuebner <heiko@sntech.de> */
  85         .dt_compat      = s3c2416_dt_compat,
  86         .map_io         = s3c2416_dt_map_io,
  87         .init_irq       = irqchip_init,
  88         .init_machine   = s3c2416_dt_machine_init,
  89          .init_time     = clocksource_of_init,
  90         .restart        = s3c2416_restart,
  91 MACHINE_END