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kernel/linux-imx6_3.14.28/arch/arm/mach-s3c24xx/mach-s3c2416-dt.c 2.8 KB
6b13f685e   김민수   BSP 최초 추가
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  /*
   * Samsung's S3C2416 flattened device tree enabled machine
   *
   * Copyright (c) 2012 Heiko Stuebner <heiko@sntech.de>
   *
   * based on mach-exynos/mach-exynos4-dt.c
   *
   * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
   *		http://www.samsung.com
   * Copyright (c) 2010-2011 Linaro Ltd.
   *		www.linaro.org
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
  */
  
  #include <linux/clocksource.h>
  #include <linux/irqchip.h>
  #include <linux/of_platform.h>
  #include <linux/serial_core.h>
  
  #include <asm/mach/arch.h>
  #include <mach/map.h>
  
  #include <plat/cpu.h>
  #include <plat/pm.h>
  #include <plat/regs-serial.h>
  
  #include "common.h"
  
  /*
   * The following lookup table is used to override device names when devices
   * are registered from device tree. This is temporarily added to enable
   * device tree support addition for the S3C2416 architecture.
   *
   * For drivers that require platform data to be provided from the machine
   * file, a platform data pointer can also be supplied along with the
   * devices names. Usually, the platform data elements that cannot be parsed
   * from the device tree by the drivers (example: function pointers) are
   * supplied. But it should be noted that this is a temporary mechanism and
   * at some point, the drivers should be capable of parsing all the platform
   * data from the device tree.
   */
  static const struct of_dev_auxdata s3c2416_auxdata_lookup[] __initconst = {
  	OF_DEV_AUXDATA("samsung,s3c2440-uart", S3C24XX_PA_UART,
  				"s3c2440-uart.0", NULL),
  	OF_DEV_AUXDATA("samsung,s3c2440-uart", S3C24XX_PA_UART + 0x4000,
  				"s3c2440-uart.1", NULL),
  	OF_DEV_AUXDATA("samsung,s3c2440-uart", S3C24XX_PA_UART + 0x8000,
  				"s3c2440-uart.2", NULL),
  	OF_DEV_AUXDATA("samsung,s3c2440-uart", S3C24XX_PA_UART + 0xC000,
  				"s3c2440-uart.3", NULL),
  	OF_DEV_AUXDATA("samsung,s3c6410-sdhci", S3C_PA_HSMMC0,
  				"s3c-sdhci.0", NULL),
  	OF_DEV_AUXDATA("samsung,s3c6410-sdhci", S3C_PA_HSMMC1,
  				"s3c-sdhci.1", NULL),
  	OF_DEV_AUXDATA("samsung,s3c2440-i2c", S3C_PA_IIC,
  				"s3c2440-i2c.0", NULL),
  	{},
  };
  
  static void __init s3c2416_dt_map_io(void)
  {
  	s3c24xx_init_io(NULL, 0);
  	s3c24xx_init_clocks(12000000);
  }
  
  static void __init s3c2416_dt_machine_init(void)
  {
  	of_platform_populate(NULL, of_default_bus_match_table,
  				s3c2416_auxdata_lookup, NULL);
  
  	s3c_pm_init();
  }
  
  static char const *s3c2416_dt_compat[] __initdata = {
  	"samsung,s3c2416",
  	"samsung,s3c2450",
  	NULL
  };
  
  DT_MACHINE_START(S3C2416_DT, "Samsung S3C2416 (Flattened Device Tree)")
  	/* Maintainer: Heiko Stuebner <heiko@sntech.de> */
  	.dt_compat	= s3c2416_dt_compat,
  	.map_io		= s3c2416_dt_map_io,
  	.init_irq	= irqchip_init,
  	.init_machine	= s3c2416_dt_machine_init,
  	 .init_time	= clocksource_of_init,
  	.restart	= s3c2416_restart,
  MACHINE_END