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/of_fdt.h>
  14 #include <linux/io.h>
  15
  16 #include <asm/mach/arch.h>
  17 #include <mach/regs-pmu.h>
  18 #include <plat/mfc.h>
  19
  20 #include "common.h"
  21
  22 static void __init exynos5_dt_machine_init(void)
  23 {
  24         struct device_node *i2c_np;
  25         const char *i2c_compat = "samsung,s3c2440-i2c";
  26         unsigned int tmp;
  27
  28         /*
  29          * Exynos5's legacy i2c controller and new high speed i2c
  30          * controller have muxed interrupt sources. By default the
  31          * interrupts for 4-channel HS-I2C controller are enabled.
  32          * If node for first four channels of legacy i2c controller
  33          * are available then re-configure the interrupts via the
  34          * system register.
  35          */
  36         for_each_compatible_node(i2c_np, NULL, i2c_compat) {
  37                 if (of_device_is_available(i2c_np)) {
  38                         if (of_alias_get_id(i2c_np, "i2c") < 4) {
  39                                 tmp = readl(EXYNOS5_SYS_I2C_CFG);
  40                                 writel(tmp & ~(0x1 << of_alias_get_id(i2c_np, "i2c")),
  41                                                 EXYNOS5_SYS_I2C_CFG);
  42                         }
  43                 }
  44         }
  45
  46         exynos_cpuidle_init();
  47
  48         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  49 }
  50
  51 static char const *exynos5_dt_compat[] __initdata = {
  52         "samsung,exynos5250",
  53         "samsung,exynos5420",
  54         "samsung,exynos5440",
  55         NULL
  56 };
  57
  58 static void __init exynos5_reserve(void)
  59 {
  60 #ifdef CONFIG_S5P_DEV_MFC
  61         struct s5p_mfc_dt_meminfo mfc_mem;
  62
  63         /* Reserve memory for MFC only if it's available */
  64         mfc_mem.compatible = "samsung,mfc-v6";
  65         if (of_scan_flat_dt(s5p_fdt_find_mfc_mem, &mfc_mem))
  66                 s5p_mfc_reserve_mem(mfc_mem.roff, mfc_mem.rsize, mfc_mem.loff,
  67                                 mfc_mem.lsize);
  68 #endif
  69 }
  70
  71 DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
  72         /* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
  73         .smp            = smp_ops(exynos_smp_ops),
  74         .map_io         = exynos_init_io,
  75         .init_machine   = exynos5_dt_machine_init,
  76         .init_late      = exynos_init_late,
  77         .dt_compat      = exynos5_dt_compat,
  78         .restart        = exynos5_restart,
  79         .reserve        = exynos5_reserve,
  80 MACHINE_END