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