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