arch/arm/mach-exynos/mach-exynos4-dt.c

   1 /*
   2  * Samsung's Exynos4210 flattened device tree enabled machine
   3  *
   4  * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
   5  *              http://www.samsung.com
   6  * Copyright (c) 2010-2011 Linaro Ltd.
   7  *              www.linaro.org
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12 */
  13
  14 #include <linux/of_platform.h>
  15 #include <linux/serial_core.h>
  16
  17 #include <asm/mach/arch.h>
  18 #include <mach/map.h>
  19
  20 #include <plat/cpu.h>
  21 #include <plat/regs-serial.h>
  22 #include <plat/exynos4.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 Exynos4 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 exynos4210_auxdata_lookup[] __initconst = {
  38         OF_DEV_AUXDATA("samsung,exynos4210-uart", S5P_PA_UART0,
  39                                 "exynos4210-uart.0", NULL),
  40         OF_DEV_AUXDATA("samsung,exynos4210-uart", S5P_PA_UART1,
  41                                 "exynos4210-uart.1", NULL),
  42         OF_DEV_AUXDATA("samsung,exynos4210-uart", S5P_PA_UART2,
  43                                 "exynos4210-uart.2", NULL),
  44         OF_DEV_AUXDATA("samsung,exynos4210-uart", S5P_PA_UART3,
  45                                 "exynos4210-uart.3", NULL),
  46         OF_DEV_AUXDATA("samsung,exynos4210-sdhci", EXYNOS4_PA_HSMMC(0),
  47                                 "exynos4-sdhci.0", NULL),
  48         OF_DEV_AUXDATA("samsung,exynos4210-sdhci", EXYNOS4_PA_HSMMC(1),
  49                                 "exynos4-sdhci.1", NULL),
  50         OF_DEV_AUXDATA("samsung,exynos4210-sdhci", EXYNOS4_PA_HSMMC(2),
  51                                 "exynos4-sdhci.2", NULL),
  52         OF_DEV_AUXDATA("samsung,exynos4210-sdhci", EXYNOS4_PA_HSMMC(3),
  53                                 "exynos4-sdhci.3", NULL),
  54         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(0),
  55                                 "s3c2440-i2c.0", NULL),
  56         OF_DEV_AUXDATA("arm,pl330", EXYNOS4_PA_PDMA0, "dma-pl330.0", NULL),
  57         OF_DEV_AUXDATA("arm,pl330", EXYNOS4_PA_PDMA1, "dma-pl330.1", NULL),
  58         {},
  59 };
  60
  61 static void __init exynos4210_dt_map_io(void)
  62 {
  63         s5p_init_io(NULL, 0, S5P_VA_CHIPID);
  64         s3c24xx_init_clocks(24000000);
  65 }
  66
  67 static void __init exynos4210_dt_machine_init(void)
  68 {
  69         of_platform_populate(NULL, of_default_bus_match_table,
  70                                 exynos4210_auxdata_lookup, NULL);
  71 }
  72
  73 static char const *exynos4210_dt_compat[] __initdata = {
  74         "samsung,exynos4210",
  75         NULL
  76 };
  77
  78 DT_MACHINE_START(EXYNOS4210_DT, "Samsung Exynos4 (Flattened Device Tree)")
  79         /* Maintainer: Thomas Abraham <thomas.abraham@linaro.org> */
  80         .init_irq       = exynos4_init_irq,
  81         .map_io         = exynos4210_dt_map_io,
  82         .init_machine   = exynos4210_dt_machine_init,
  83         .timer          = &exynos4_timer,
  84         .dt_compat      = exynos4210_dt_compat,
  85 MACHINE_END