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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/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         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
47 }
48
49 static char const *exynos5_dt_compat[] __initdata = {
50         "samsung,exynos5250",
51         "samsung,exynos5420",
52         "samsung,exynos5440",
53         NULL
54 };
55
56 static void __init exynos5_reserve(void)
57 {
58 #ifdef CONFIG_S5P_DEV_MFC
59         struct s5p_mfc_dt_meminfo mfc_mem;
60
61         /* Reserve memory for MFC only if it's available */
62         mfc_mem.compatible = "samsung,mfc-v6";
63         if (of_scan_flat_dt(s5p_fdt_find_mfc_mem, &mfc_mem))
64                 s5p_mfc_reserve_mem(mfc_mem.roff, mfc_mem.rsize, mfc_mem.loff,
65                                 mfc_mem.lsize);
66 #endif
67 }
68
69 DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
70         /* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
71         .smp            = smp_ops(exynos_smp_ops),
72         .map_io         = exynos_init_io,
73         .init_machine   = exynos5_dt_machine_init,
74         .init_late      = exynos_init_late,
75         .init_time      = exynos_init_time,
76         .dt_compat      = exynos5_dt_compat,
77         .restart        = exynos5_restart,
78         .reserve        = exynos5_reserve,
79 MACHINE_END