arm: tegra: fuse: replace globals with functions
[linux-3.10.git] / arch / arm / mach-shmobile / pm-r8a7740.c
1 /*
2  * r8a7740 power management support
3  *
4  * Copyright (C) 2012  Renesas Solutions Corp.
5  * Copyright (C) 2012  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6  *
7  * This file is subject to the terms and conditions of the GNU General Public
8  * License.  See the file "COPYING" in the main directory of this archive
9  * for more details.
10  */
11 #include <linux/console.h>
12 #include <linux/suspend.h>
13 #include <mach/pm-rmobile.h>
14 #include <mach/common.h>
15
16 #ifdef CONFIG_PM
17 static int r8a7740_pd_a4s_suspend(void)
18 {
19         /*
20          * The A4S domain contains the CPU core and therefore it should
21          * only be turned off if the CPU is in use.
22          */
23         return -EBUSY;
24 }
25
26 static int r8a7740_pd_a3sp_suspend(void)
27 {
28         /*
29          * Serial consoles make use of SCIF hardware located in A3SP,
30          * keep such power domain on if "no_console_suspend" is set.
31          */
32         return console_suspend_enabled ? 0 : -EBUSY;
33 }
34
35 static struct rmobile_pm_domain r8a7740_pm_domains[] = {
36         {
37                 .genpd.name     = "A4S",
38                 .bit_shift      = 10,
39                 .gov            = &pm_domain_always_on_gov,
40                 .no_debug       = true,
41                 .suspend        = r8a7740_pd_a4s_suspend,
42         },
43         {
44                 .genpd.name     = "A3SP",
45                 .bit_shift      = 11,
46                 .gov            = &pm_domain_always_on_gov,
47                 .no_debug       = true,
48                 .suspend        = r8a7740_pd_a3sp_suspend,
49         },
50         {
51                 .genpd.name     = "A4LC",
52                 .bit_shift      = 1,
53         },
54 };
55
56 void __init r8a7740_init_pm_domains(void)
57 {
58         rmobile_init_domains(r8a7740_pm_domains, ARRAY_SIZE(r8a7740_pm_domains));
59         pm_genpd_add_subdomain_names("A4S", "A3SP");
60 }
61
62 #endif /* CONFIG_PM */
63
64 #ifdef CONFIG_SUSPEND
65 static int r8a7740_enter_suspend(suspend_state_t suspend_state)
66 {
67         cpu_do_idle();
68         return 0;
69 }
70
71 static void r8a7740_suspend_init(void)
72 {
73         shmobile_suspend_ops.enter = r8a7740_enter_suspend;
74 }
75 #else
76 static void r8a7740_suspend_init(void) {}
77 #endif
78
79 void __init r8a7740_pm_init(void)
80 {
81         r8a7740_suspend_init();
82 }