diff options
Diffstat (limited to 'arch/arm/mach-mvebu/board-v7.c')
-rw-r--r-- | arch/arm/mach-mvebu/board-v7.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/arch/arm/mach-mvebu/board-v7.c b/arch/arm/mach-mvebu/board-v7.c new file mode 100644 index 000000000000..333fca8fdc41 --- /dev/null +++ b/arch/arm/mach-mvebu/board-v7.c | |||
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1 | /* | ||
2 | * Device Tree support for Armada 370 and XP platforms. | ||
3 | * | ||
4 | * Copyright (C) 2012 Marvell | ||
5 | * | ||
6 | * Lior Amsalem <alior@marvell.com> | ||
7 | * Gregory CLEMENT <gregory.clement@free-electrons.com> | ||
8 | * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | ||
9 | * | ||
10 | * This file is licensed under the terms of the GNU General Public | ||
11 | * License version 2. This program is licensed "as is" without any | ||
12 | * warranty of any kind, whether express or implied. | ||
13 | */ | ||
14 | |||
15 | #include <linux/kernel.h> | ||
16 | #include <linux/init.h> | ||
17 | #include <linux/clk-provider.h> | ||
18 | #include <linux/of_address.h> | ||
19 | #include <linux/of_platform.h> | ||
20 | #include <linux/io.h> | ||
21 | #include <linux/clocksource.h> | ||
22 | #include <linux/dma-mapping.h> | ||
23 | #include <linux/mbus.h> | ||
24 | #include <linux/signal.h> | ||
25 | #include <linux/slab.h> | ||
26 | #include <asm/hardware/cache-l2x0.h> | ||
27 | #include <asm/mach/arch.h> | ||
28 | #include <asm/mach/map.h> | ||
29 | #include <asm/mach/time.h> | ||
30 | #include "armada-370-xp.h" | ||
31 | #include "common.h" | ||
32 | #include "coherency.h" | ||
33 | #include "mvebu-soc-id.h" | ||
34 | |||
35 | /* | ||
36 | * Early versions of Armada 375 SoC have a bug where the BootROM | ||
37 | * leaves an external data abort pending. The kernel is hit by this | ||
38 | * data abort as soon as it enters userspace, because it unmasks the | ||
39 | * data aborts at this moment. We register a custom abort handler | ||
40 | * below to ignore the first data abort to work around this | ||
41 | * problem. | ||
42 | */ | ||
43 | static int armada_375_external_abort_wa(unsigned long addr, unsigned int fsr, | ||
44 | struct pt_regs *regs) | ||
45 | { | ||
46 | static int ignore_first; | ||
47 | |||
48 | if (!ignore_first && fsr == 0x1406) { | ||
49 | ignore_first = 1; | ||
50 | return 0; | ||
51 | } | ||
52 | |||
53 | return 1; | ||
54 | } | ||
55 | |||
56 | static void __init mvebu_timer_and_clk_init(void) | ||
57 | { | ||
58 | of_clk_init(NULL); | ||
59 | clocksource_of_init(); | ||
60 | coherency_init(); | ||
61 | BUG_ON(mvebu_mbus_dt_init()); | ||
62 | #ifdef CONFIG_CACHE_L2X0 | ||
63 | l2x0_of_init(0, ~0UL); | ||
64 | #endif | ||
65 | |||
66 | if (of_machine_is_compatible("marvell,armada375")) | ||
67 | hook_fault_code(16 + 6, armada_375_external_abort_wa, SIGBUS, 0, | ||
68 | "imprecise external abort"); | ||
69 | } | ||
70 | |||
71 | static void __init i2c_quirk(void) | ||
72 | { | ||
73 | struct device_node *np; | ||
74 | u32 dev, rev; | ||
75 | |||
76 | /* | ||
77 | * Only revisons more recent than A0 support the offload | ||
78 | * mechanism. We can exit only if we are sure that we can | ||
79 | * get the SoC revision and it is more recent than A0. | ||
80 | */ | ||
81 | if (mvebu_get_soc_id(&rev, &dev) == 0 && dev > MV78XX0_A0_REV) | ||
82 | return; | ||
83 | |||
84 | for_each_compatible_node(np, NULL, "marvell,mv78230-i2c") { | ||
85 | struct property *new_compat; | ||
86 | |||
87 | new_compat = kzalloc(sizeof(*new_compat), GFP_KERNEL); | ||
88 | |||
89 | new_compat->name = kstrdup("compatible", GFP_KERNEL); | ||
90 | new_compat->length = sizeof("marvell,mv78230-a0-i2c"); | ||
91 | new_compat->value = kstrdup("marvell,mv78230-a0-i2c", | ||
92 | GFP_KERNEL); | ||
93 | |||
94 | of_update_property(np, new_compat); | ||
95 | } | ||
96 | return; | ||
97 | } | ||
98 | |||
99 | static void __init mvebu_dt_init(void) | ||
100 | { | ||
101 | if (of_machine_is_compatible("plathome,openblocks-ax3-4")) | ||
102 | i2c_quirk(); | ||
103 | of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); | ||
104 | } | ||
105 | |||
106 | static const char * const armada_370_xp_dt_compat[] = { | ||
107 | "marvell,armada-370-xp", | ||
108 | NULL, | ||
109 | }; | ||
110 | |||
111 | DT_MACHINE_START(ARMADA_370_XP_DT, "Marvell Armada 370/XP (Device Tree)") | ||
112 | .smp = smp_ops(armada_xp_smp_ops), | ||
113 | .init_machine = mvebu_dt_init, | ||
114 | .init_time = mvebu_timer_and_clk_init, | ||
115 | .restart = mvebu_restart, | ||
116 | .dt_compat = armada_370_xp_dt_compat, | ||
117 | MACHINE_END | ||
118 | |||
119 | static const char * const armada_375_dt_compat[] = { | ||
120 | "marvell,armada375", | ||
121 | NULL, | ||
122 | }; | ||
123 | |||
124 | DT_MACHINE_START(ARMADA_375_DT, "Marvell Armada 375 (Device Tree)") | ||
125 | .init_time = mvebu_timer_and_clk_init, | ||
126 | .restart = mvebu_restart, | ||
127 | .dt_compat = armada_375_dt_compat, | ||
128 | MACHINE_END | ||
129 | |||
130 | static const char * const armada_38x_dt_compat[] = { | ||
131 | "marvell,armada380", | ||
132 | "marvell,armada385", | ||
133 | NULL, | ||
134 | }; | ||
135 | |||
136 | DT_MACHINE_START(ARMADA_38X_DT, "Marvell Armada 380/385 (Device Tree)") | ||
137 | .init_time = mvebu_timer_and_clk_init, | ||
138 | .restart = mvebu_restart, | ||
139 | .dt_compat = armada_38x_dt_compat, | ||
140 | MACHINE_END | ||