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mach-exynos
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mach-exynos5-dt.c

mach-exynos5-dt.c 2.3 KB
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  1. /*
    2. 

  2.  * SAMSUNG EXYNOS5250 Flattened Device Tree enabled machine
    3. 

  3.  *
    4. 

  4.  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
    5. 

  5.  *		http://www.samsung.com
    6. 

  6.  *
    7. 

  7.  * This program is free software; you can redistribute it and/or modify
    8. 

  8.  * it under the terms of the GNU General Public License version 2 as
    9. 

  9.  * published by the Free Software Foundation.
    10. 

  10. */
    11. 

  11. 

  12. #include <linux/of_platform.h>
    13. 

  13. #include <linux/of_fdt.h>
    14. 

  14. #include <linux/memblock.h>
    15. 

  15. #include <linux/io.h>
    16. 

  16. #include <linux/clocksource.h>
    17. 

  17. 

  18. #include <asm/mach/arch.h>
    19. 

  19. #include <mach/regs-pmu.h>
    20. 

  20. 

  21. #include <plat/cpu.h>
    22. 

  22. #include <plat/mfc.h>
    23. 

  23. 

  24. #include "common.h"
    25. 

  25. 

  26. static void __init exynos5_dt_machine_init(void)
    27. 

  27. {
    28. 

  28. 	struct device_node *i2c_np;
    29. 

  29. 	const char *i2c_compat = "samsung,s3c2440-i2c";
    30. 

  30. 	unsigned int tmp;
    31. 

  31. 

  32. 	/*
    33. 

  33. 	 * Exynos5's legacy i2c controller and new high speed i2c
    34. 

  34. 	 * controller have muxed interrupt sources. By default the
    35. 

  35. 	 * interrupts for 4-channel HS-I2C controller are enabled.
    36. 

  36. 	 * If node for first four channels of legacy i2c controller
    37. 

  37. 	 * are available then re-configure the interrupts via the
    38. 

  38. 	 * system register.
    39. 

  39. 	 */
    40. 

  40. 	for_each_compatible_node(i2c_np, NULL, i2c_compat) {
    41. 

  41. 		if (of_device_is_available(i2c_np)) {
    42. 

  42. 			if (of_alias_get_id(i2c_np, "i2c") < 4) {
    43. 

  43. 				tmp = readl(EXYNOS5_SYS_I2C_CFG);
    44. 

  44. 				writel(tmp & ~(0x1 << of_alias_get_id(i2c_np, "i2c")),
    45. 

  45. 						EXYNOS5_SYS_I2C_CFG);
    46. 

  46. 			}
    47. 

  47. 		}
    48. 

  48. 	}
    49. 

  49. 

  50. 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
    51. 

  51. }
    52. 

  52. 

  53. static char const *exynos5_dt_compat[] __initdata = {
    54. 

  54. 	"samsung,exynos5250",
    55. 

  55. 	"samsung,exynos5420",
    56. 

  56. 	"samsung,exynos5440",
    57. 

  57. 	NULL
    58. 

  58. };
    59. 

  59. 

  60. static void __init exynos5_reserve(void)
    61. 

  61. {
    62. 

  62. #ifdef CONFIG_S5P_DEV_MFC
    63. 

  63. 	struct s5p_mfc_dt_meminfo mfc_mem;
    64. 

  64. 

  65. 	/* Reserve memory for MFC only if it's available */
    66. 

  66. 	mfc_mem.compatible = "samsung,mfc-v6";
    67. 

  67. 	if (of_scan_flat_dt(s5p_fdt_find_mfc_mem, &mfc_mem))
    68. 

  68. 		s5p_mfc_reserve_mem(mfc_mem.roff, mfc_mem.rsize, mfc_mem.loff,
    69. 

  69. 				mfc_mem.lsize);
    70. 

  70. #endif
    71. 

  71. }
    72. 

  72. 

  73. DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
    74. 

  74. 	/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
    75. 

  75. 	.smp		= smp_ops(exynos_smp_ops),
    76. 

  76. 	.map_io		= exynos_init_io,
    77. 

  77. 	.init_machine	= exynos5_dt_machine_init,
    78. 

  78. 	.init_late	= exynos_init_late,
    79. 

  79. 	.init_time	= exynos_init_time,
    80. 

  80. 	.dt_compat	= exynos5_dt_compat,
    81. 

  81. 	.restart        = exynos5_restart,
    82. 

  82. 	.reserve	= exynos5_reserve,
    83. 

  83. MACHINE_END
    84.