projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 8459293c KM |
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 | */ | |
| 802a5639 | 11 | #include <linux/console.h> |
| 895d3b53 | 12 | #include <linux/suspend.h> |
| fd44aa5e | 13 | #include "common.h" |
| 6b8b0cb4 | 14 | #include "pm-rmobile.h" |
| 8459293c | 15 | |
| c41215b7 | 16 | #if defined(CONFIG_PM) && !defined(CONFIG_ARCH_MULTIPLATFORM) |
| 8459293c KM |
17 | static int r8a7740_pd_a4s_suspend(void) |
| 18 | { | |
| 19 | /* | |
| 20 | * The A4S domain contains the CPU core and therefore it should | |
| 8237f9e5 | 21 | * only be turned off if the CPU is not in use. |
| 8459293c KM |
22 | */ |
| 23 | return -EBUSY; | |
| 24 | } | |
| 25 | ||
| 802a5639 KM |
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 | ||
| 7b567407 RW |
35 | static struct rmobile_pm_domain r8a7740_pm_domains[] = { |
| 36 | { | |
| 75349099 GU |
37 | .genpd.name = "A4LC", |
| 38 | .bit_shift = 1, | |
| 39 | }, { | |
| 7b567407 RW |
40 | .genpd.name = "A4S", |
| 41 | .bit_shift = 10, | |
| 42 | .gov = &pm_domain_always_on_gov, | |
| 43 | .no_debug = true, | |
| 44 | .suspend = r8a7740_pd_a4s_suspend, | |
| 75349099 | 45 | }, { |
| 7b567407 RW |
46 | .genpd.name = "A3SP", |
| 47 | .bit_shift = 11, | |
| 48 | .gov = &pm_domain_always_on_gov, | |
| 49 | .no_debug = true, | |
| 50 | .suspend = r8a7740_pd_a3sp_suspend, | |
| 51 | }, | |
| 802a5639 KM |
52 | }; |
| 53 | ||
| 7b567407 RW |
54 | void __init r8a7740_init_pm_domains(void) |
| 55 | { | |
| 56 | rmobile_init_domains(r8a7740_pm_domains, ARRAY_SIZE(r8a7740_pm_domains)); | |
| 57 | pm_genpd_add_subdomain_names("A4S", "A3SP"); | |
| 58 | } | |
| c41215b7 | 59 | #endif /* CONFIG_PM && !CONFIG_ARCH_MULTIPLATFORM */ |
| 895d3b53 BH |
60 | |
| 61 | #ifdef CONFIG_SUSPEND | |
| 62 | static int r8a7740_enter_suspend(suspend_state_t suspend_state) | |
| 63 | { | |
| 64 | cpu_do_idle(); | |
| 65 | return 0; | |
| 66 | } | |
| 67 | ||
| 68 | static void r8a7740_suspend_init(void) | |
| 69 | { | |
| 70 | shmobile_suspend_ops.enter = r8a7740_enter_suspend; | |
| 71 | } | |
| 72 | #else | |
| 73 | static void r8a7740_suspend_init(void) {} | |
| 74 | #endif | |
| 75 | ||
| 76 | void __init r8a7740_pm_init(void) | |
| 77 | { | |
| 78 | r8a7740_suspend_init(); | |
| 79 | } |